edu.harvard.iq.dvn.core.web.study.StudyVersionDifferencesPage.java Source code

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Here is the source code for edu.harvard.iq.dvn.core.web.study.StudyVersionDifferencesPage.java

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/*
 * Dataverse Network - A web application to distribute, share and analyze quantitative data.
 * Copyright (C) 2007
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses
 * or write to the Free Software Foundation,Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301 USA
 */

/*
 * StudyVersionDifferencesPage.java
 *
 * Created on February 18, 2010, 3:02 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
package edu.harvard.iq.dvn.core.web.study;

import edu.harvard.iq.dvn.core.study.StudyServiceLocal;
import edu.harvard.iq.dvn.core.study.StudyVersion;
import edu.harvard.iq.dvn.core.study.FileMetadata;
import edu.harvard.iq.dvn.core.web.MainLayoutBean;
import java.io.File;
import org.apache.commons.io.FileUtils;

import edu.harvard.iq.dvn.core.web.common.VDCBaseBean;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.EJB;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import javax.servlet.http.HttpServletRequest;

/**
 *
 * @author Leonid Andreev
 */
public class StudyVersionDifferencesPage extends VDCBaseBean implements java.io.Serializable {

    @EJB
    private StudyServiceLocal studyService;

    public StudyVersionDifferencesPage() {
    }

    // params
    private String actionMode;
    private Long studyId;
    private String versionNumberList;
    VersionNotesPopupBean versionNotesPopup;

    public VersionNotesPopupBean getVersionNotesPopup() {
        return versionNotesPopup;
    }

    public void setVersionNotesPopup(VersionNotesPopupBean versionNotesPopup) {
        this.versionNotesPopup = versionNotesPopup;
    }

    public String getActionMode() {
        return actionMode;
    }

    public void setActionMode(String am) {
        this.actionMode = am;
    }

    public Long getStudyId() {
        return studyId;
    }

    public void setStudyId(Long studyId) {
        this.studyId = studyId;
    }

    public String getVersionNumberList() {
        return versionNumberList;
    }

    public void setVersionNumberList(String vnl) {
        this.versionNumberList = vnl;
    }

    // internals
    private Long versionNumber1 = null;
    private Long versionNumber2 = null;

    private StudyVersion studyVersion1 = null;
    private StudyVersion studyVersion2 = null;

    private StudyUI studyUI1;
    private StudyUI studyUI2;

    private List<catalogInfoDifferenceItem> citationDiffList;
    private List<catalogInfoDifferenceItem> abstractandscopeDiffList;
    private List<catalogInfoDifferenceItem> datacollectionDiffList;
    private List<catalogInfoDifferenceItem> dataavailDiffList;
    private List<catalogInfoDifferenceItem> termsofuseDiffList;
    private List<catalogInfoDifferenceItem> notesDiffList;

    private List<studyFileDifferenceItem> studyFilesDiffList;

    private String noCatalogDifferencesFoundLabel = "";
    private String noFileDifferencesFoundLabel = "";

    public List<catalogInfoDifferenceItem> getCitationDiffList() {
        return citationDiffList;
    }

    public void setCitationDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.citationDiffList = cidl;
    }

    public List<catalogInfoDifferenceItem> getAbstractandscopeDiffList() {
        return abstractandscopeDiffList;
    }

    public void setAbstractandscopeDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.abstractandscopeDiffList = cidl;
    }

    public List<catalogInfoDifferenceItem> getDatacollectionDiffList() {
        return datacollectionDiffList;
    }

    public void setDatacollectionDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.datacollectionDiffList = cidl;
    }

    public List<catalogInfoDifferenceItem> getDataavailDiffList() {
        return dataavailDiffList;
    }

    public void setDataavailDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.dataavailDiffList = cidl;
    }

    public List<catalogInfoDifferenceItem> getTermsofuseDiffList() {
        return termsofuseDiffList;
    }

    public void setTermsofuseDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.termsofuseDiffList = cidl;
    }

    public List<catalogInfoDifferenceItem> getNotesDiffList() {
        return notesDiffList;
    }

    public void setNotesDiffList(List<catalogInfoDifferenceItem> cidl) {
        this.notesDiffList = cidl;
    }

    public List<studyFileDifferenceItem> getStudyFilesDiffList() {
        return studyFilesDiffList;
    }

    public void setStudyFilesDiffList(List<studyFileDifferenceItem> sfdl) {
        this.studyFilesDiffList = sfdl;
    }

    public Long getVersionNumber1() {
        return versionNumber1;
    }

    public void setVersionNumber1(Long versionNumber) {
        this.versionNumber1 = versionNumber;
    }

    public Long getVersionNumber2() {
        return versionNumber2;
    }

    public void setVersionNumber2(Long versionNumber) {
        this.versionNumber2 = versionNumber;
    }

    public StudyVersion getStudyVersion1() {
        return studyVersion1;
    }

    public void setStudyVersion1(StudyVersion sv) {
        this.studyVersion1 = sv;
    }

    public StudyVersion getStudyVersion2() {
        return studyVersion2;
    }

    public void setStudyVersion2(StudyVersion sv) {
        this.studyVersion2 = sv;
    }

    public StudyUI getStudyUI1() {
        return studyUI1;
    }

    public void setStudyUI1(StudyUI studyUI) {
        this.studyUI1 = studyUI;
    }

    public StudyUI getStudyUI2() {
        return studyUI2;
    }

    public void setStudyUI2(StudyUI studyUI) {
        this.studyUI2 = studyUI;
    }

    public String getNoCatalogDifferencesFoundLabel() {
        return noCatalogDifferencesFoundLabel;
    }

    public void setNoCatalogDifferencesFoundLabel(String label) {
        noCatalogDifferencesFoundLabel = label;
    }

    public String getNoFileDifferencesFoundLabel() {
        return noFileDifferencesFoundLabel;
    }

    public void setNoFileDifferencesFoundLabel(String label) {
        noFileDifferencesFoundLabel = label;
    }

    public void init() {
        super.init();

        HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext()
                .getRequest();

        if (studyId == null) {
            studyId = getVDCRequestBean().getStudyId();
        }

        if (actionMode == null) {
            actionMode = getVDCRequestBean().getActionMode();
        }

        Long[] versionNumberValues = getVDCRequestBean().parseVersionNumberList(request);
        if (studyId != null && versionNumberValues != null) {

            if (versionNumberValues[0] != null && versionNumberValues[1] != null) {
                // we want to show first the older version,
                // then the newer:
                if (versionNumberValues[0].compareTo(versionNumberValues[1]) < 0) {
                    versionNumber1 = versionNumberValues[0];
                    versionNumber2 = versionNumberValues[1];
                } else {
                    versionNumber1 = versionNumberValues[1];
                    versionNumber2 = versionNumberValues[0];
                }

                studyVersion1 = studyService.getStudyVersion(studyId, versionNumber1);
                studyVersion2 = studyService.getStudyVersion(studyId, versionNumber2);
            }

            if (studyVersion1 == null || studyVersion2 == null) {
                redirect("/faces/IdDoesNotExistPage.xhtml?type=Study%20Version");
                return;
            }

            studyUI1 = new StudyUI(studyVersion1, getVDCSessionBean().getUser(), true);
            studyUI2 = new StudyUI(studyVersion2, getVDCSessionBean().getUser(), true);

            //initPanelDisplay();

            initCatalogInfoDifferencesList();

            initStudyFilesDifferencesList();

        } else {
            // We must have a StudyId and the Version numbers; throw an error
            //System.out.println("ERROR: in StudyVersionDifferencePage, without a studyId and/or version Ids");
        }
    }

    public boolean isReleaseConfrimInProgress() {
        return ("confirmRelease".equals(actionMode));
    }

    public boolean isCatalogingInformationDifferent() {
        return citationDiffList.size() > 0 || abstractandscopeDiffList.size() > 0
                || datacollectionDiffList.size() > 0 || dataavailDiffList.size() > 0
                || termsofuseDiffList.size() > 0 || notesDiffList.size() > 0;
    }

    public boolean isStudyFilesDifferent() {
        //return false;
        return studyFilesDiffList.size() > 0;
    }

    public void openPopup(ActionEvent ae) {
        versionNotesPopup.setActionType(VersionNotesPopupBean.ActionType.VERSION_RELEASE);
        versionNotesPopup.setVersionNote(studyUI2.getStudyVersion().getVersionNote());
        versionNotesPopup.openPopup(ae);
    }

    //public void saveVersionNoteAndRelease (ActionEvent ae) {
    public String saveVersionNoteAndRelease() {
        // First we save the Version Note:
        studyUI2.getStudyVersion().setVersionNote(versionNotesPopup.getVersionNote());

        // Release the latest version, save the new version note,
        // and archive the previously released version:
        studyService.setReleased(studyUI2.getStudy().getId(), studyUI2.getStudyVersion().getVersionNote());

        // the setReleased method in the StudyServiceBean, above,
        // also updates the study with the Indexer service.
        // every time a study is released.

        versionNotesPopup.setShowPopup(false);

        // And now we are redirecting back to the StudyPage;
        // no need to specify the version really, since the latest version is now released.
        //redirect("/faces/study/StudyPage.xhtml?studyId="+studyId);

        getVDCRequestBean().setStudyId(getStudyId());
        //getVDCRequestBean().setStudyVersionNumber(getVersionNumber2());

        return "viewStudy";

    }

    public String cancel() {

        // Do nothing and redirect back to the StudyPage;
        // Need to set the HTTP parameters:

        getVDCRequestBean().setStudyId(getStudyId());
        //getVDCRequestBean().setStudyVersionNumber(getVersionNumber2());

        return "viewStudy";

    }

    private void initCatalogInfoDifferencesList() {
        initCitationDifferencesList();
        initAbstractandscopeDifferencesList();
        initDatacollectionDifferencesList();
        initDataavailDifferencesList();
        initTermsofuseDifferencesList();
        initNotesDifferencesList();

        if (!isCatalogingInformationDifferent()) {
            noCatalogDifferencesFoundLabel = "There are no differences in the Cataloging Information between the 2 versions";
        }
    }

    private void initStudyFilesDifferencesList() {
        studyFilesDiffList = new ArrayList<studyFileDifferenceItem>();

        // Study Files themselves are version-less;
        // In other words, 2 different versions can have different sets of
        // study files, but the files themselves don't have versions.
        // So in order to find the differences between the 2 sets of study
        // files in 2 versions we can just go through the lists of the
        // files and compare the ids. If both versions have the file with
        // the same file id, it is the same file.

        // UPDATE: in addition to the above, even when the 2 versions share the
        // same study file, the file metadatas ARE version-specific, so some of
        // the fields there (filename, etc.) may be different. If this is the
        // case, we want to display these differences as well.

        if (studyUI1.getFileMetadataList().size() == 0 && studyUI2.getFileMetadataList().size() == 0) {
            noFileDifferencesFoundLabel = "No data files in either version of the study";
            return;
        }

        int i = 0;
        int j = 0;

        FileMetadata fm1;
        FileMetadata fm2;

        while (i < studyUI1.getFileMetadataList().size() && j < studyUI2.getFileMetadataList().size()) {
            fm1 = studyUI1.getFileMetadataList().get(i);
            fm2 = studyUI2.getFileMetadataList().get(j);

            if (fm1.getStudyFile().getId().compareTo(fm2.getStudyFile().getId()) == 0) {
                // The 2 versions share the same study file;
                // Check if the metadata information is identical in the 2 versions
                // of the metadata:
                if (fileMetadataIsDifferent(fm1, fm2)) {
                    studyFileDifferenceItem fdi = selectFileMetadataDiffs(fm1, fm2);
                    fdi.setFileId(fm1.getStudyFile().getId().toString());
                    studyFilesDiffList.add(fdi);
                }
                i++;
                j++;
            } else if (fm1.getStudyFile().getId().compareTo(fm2.getStudyFile().getId()) > 0) {
                studyFileDifferenceItem fdi = selectFileMetadataDiffs(null, fm2);
                fdi.setFileId(fm2.getStudyFile().getId().toString());
                studyFilesDiffList.add(fdi);

                j++;
            } else if (fm1.getStudyFile().getId().compareTo(fm2.getStudyFile().getId()) < 0) {
                studyFileDifferenceItem fdi = selectFileMetadataDiffs(fm1, null);
                fdi.setFileId(fm1.getStudyFile().getId().toString());
                studyFilesDiffList.add(fdi);

                i++;
            }
        }

        // We've reached the end of at least one file list.
        // Whatever files are left on either of the 2 lists are automatically "different"
        // between the 2 versions.

        while (i < studyUI1.getFileMetadataList().size()) {
            fm1 = studyUI1.getFileMetadataList().get(i);
            studyFileDifferenceItem fdi = selectFileMetadataDiffs(null, fm1);
            fdi.setFileId(fm1.getStudyFile().getId().toString());
            studyFilesDiffList.add(fdi);

            i++;
        }

        while (j < studyUI2.getFileMetadataList().size()) {
            fm2 = studyUI2.getFileMetadataList().get(j);
            studyFileDifferenceItem fdi = selectFileMetadataDiffs(null, fm2);
            fdi.setFileId(fm2.getStudyFile().getId().toString());
            studyFilesDiffList.add(fdi);

            j++;
        }

        if (studyFilesDiffList.size() == 0) {
            noFileDifferencesFoundLabel = "These study versions have identical sets of data files";
        }
    }

    private boolean fileMetadataIsDifferent(FileMetadata fm1, FileMetadata fm2) {
        if (fm1 == null && fm2 == null) {
            return false;
        }

        if (fm1 == null && fm2 != null) {
            return true;
        }

        if (fm2 == null && fm1 != null) {
            return true;
        }

        // Both are non-null metadata objects.
        // We simply go through the 5 metadata fields, if any one of them
        // is different between the 2 versions, we declare the objects
        // different.

        String value1;
        String value2;

        // filename:

        value1 = fm1.getStudyFile().getFileName();
        value2 = fm2.getStudyFile().getFileName();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {
                return true;
            }
        }

        // file type:
        value1 = fm1.getStudyFile().getFileType();
        value2 = fm2.getStudyFile().getFileType();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {
                return true;
            }
        }

        // file size:
        value1 = FileUtils.byteCountToDisplaySize(new File(fm1.getStudyFile().getFileSystemLocation()).length());
        value2 = FileUtils.byteCountToDisplaySize(new File(fm2.getStudyFile().getFileSystemLocation()).length());

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {
                return true;
            }
        }

        // file category:
        value1 = fm1.getCategory();
        value2 = fm2.getCategory();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {
                return true;
            }
        }

        // file description:
        value1 = fm1.getDescription();
        value2 = fm2.getDescription();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {
                return true;
            }
        }

        // if we got this far, the 2 metadatas are identical:
        return false;
    }

    private studyFileDifferenceItem selectFileMetadataDiffs(FileMetadata fm1, FileMetadata fm2) {
        studyFileDifferenceItem fdi = new studyFileDifferenceItem();

        if (fm1 == null && fm2 == null) {
            // this should never happen; but if it does,
            // we return an empty diff object.

            return fdi;

        }
        if (fm2 == null) {
            fdi.setFileName1(fm1.getLabel());
            fdi.setFileType1(fm1.getStudyFile().getFileType());
            fdi.setFileSize1(FileUtils
                    .byteCountToDisplaySize(new File(fm1.getStudyFile().getFileSystemLocation()).length()));
            fdi.setFileCat1(fm1.getCategory());
            fdi.setFileDesc1(fm1.getDescription());

            fdi.setFile2Empty(true);

        } else if (fm1 == null) {
            fdi.setFile1Empty(true);

            fdi.setFileName2(fm2.getLabel());
            fdi.setFileType2(fm2.getStudyFile().getFileType());
            fdi.setFileSize2(FileUtils
                    .byteCountToDisplaySize(new File(fm2.getStudyFile().getFileSystemLocation()).length()));
            fdi.setFileCat2(fm2.getCategory());
            fdi.setFileDesc2(fm2.getDescription());

        } else {
            // Both are non-null metadata objects.
            // We simply go through the 5 metadata fields, if any are
            // different between the 2 versions, we add them to the
            // difference object:

            String value1;
            String value2;

            // filename:

            value1 = fm1.getLabel();
            value2 = fm2.getLabel();

            if (value1 != null || value2 != null) {
                if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                    if (value1 == null || value1.equals("")) {
                        value1 = "[Empty]";
                    } else if (value2 == null || value2.equals("")) {
                        value2 = "[Empty]";
                    }

                    fdi.setFileName1(value1);
                    fdi.setFileName2(value2);
                }
            }

            // NOTE:
            // fileType and fileSize will always be the same
            // for the same studyFile! -- so no need to check for differences in
            // these 2 items.

            // file category:

            value1 = fm1.getCategory();
            value2 = fm2.getCategory();

            if (value1 != null || value2 != null) {
                if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                    if (value1 == null || value1.equals("")) {
                        value1 = "[Empty]";
                    } else if (value2 == null || value2.equals("")) {
                        value2 = "[Empty]";
                    }

                    fdi.setFileCat1(value1);
                    fdi.setFileCat2(value2);
                }
            }

            // file description:

            value1 = fm1.getDescription();
            value2 = fm2.getDescription();

            if (value1 != null || value2 != null) {
                if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                    if (value1 == null || value1.equals("")) {
                        value1 = "[Empty]";
                    } else if (value2 == null || value2.equals("")) {
                        value2 = "[Empty]";
                    }

                    fdi.setFileDesc1(value1);
                    fdi.setFileDesc2(value2);
                }
            }
        }
        return fdi;
    }

    private void initCitationDifferencesList() {
        // Can't think of a better way of doing this than just going
        // through and comparing all the cataloging information entries.
        //
        // I also decided to use the same exact items for these comparisons
        // that we generate for the study view page, in the same order.
        //
        // The code below is largely automatically generated from the
        // cataloging information items on the study view page.

        String value1;
        String value2;

        citationDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getMetadata().getTitle();
        value2 = getStudyUI2().getMetadata().getTitle();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Title");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getSubTitle();
        value2 = getStudyUI2().getMetadata().getSubTitle();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Subtitle");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getStudy().getGlobalId();
        value2 = getStudyUI2().getStudy().getGlobalId();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Global ID");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getUNF();
        value2 = getStudyUI2().getMetadata().getUNF();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[N/A]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[N/A]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("UNF");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getOtherIds();
        value2 = getStudyUI2().getOtherIds();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Other ID");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getAuthorAffiliations();
        value2 = getStudyUI2().getAuthorAffiliations();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Author");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getProducers();
        value2 = getStudyUI2().getProducers();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Producer");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getProductionDate();
        value2 = getStudyUI2().getProductionDate();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Production Date");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getProductionPlace();
        value2 = getStudyUI2().getMetadata().getProductionPlace();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Production Place");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getSoftware();
        value2 = getStudyUI2().getSoftware();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Software");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getFundingAgency();
        value2 = getStudyUI2().getMetadata().getFundingAgency();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Funding Agency");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getGrants();
        value2 = getStudyUI2().getGrants();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Grant Number");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getDistributors();
        value2 = getStudyUI2().getDistributors();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Distributor");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getDistributorContact();
        value2 = getStudyUI2().getDistributorContact();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Distributor Contact");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getDistributionDate();
        value2 = getStudyUI2().getDistributionDate();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Distribution Date");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDepositor();
        value2 = getStudyUI2().getMetadata().getDepositor();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Depositor");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getDateOfDeposit();
        value2 = getStudyUI2().getDateOfDeposit();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Deposit Date");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getSeries();
        value2 = getStudyUI2().getSeries();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Series");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getStudyVersionText();
        value2 = getStudyUI2().getStudyVersionText();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Version");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getReplicationFor();
        value2 = getStudyUI2().getMetadata().getReplicationFor();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Replication For");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                citationDiffList.add(idi);

            }
        }

    }

    private void initAbstractandscopeDifferencesList() {
        String value1;
        String value2;

        abstractandscopeDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getAbstracts();
        value2 = getStudyUI2().getAbstracts();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Abstract");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getAbstractDates();
        value2 = getStudyUI2().getAbstractDates();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Abstract Date");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getKeywords();
        value2 = getStudyUI2().getKeywords();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Keyword");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getTopicClasses();
        value2 = getStudyUI2().getTopicClasses();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Topic Classification");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

        value1 = getStudyUI1().getRelPublications();
        value2 = getStudyUI2().getRelPublications();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Related Publications");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

        value1 = getStudyUI1().getRelMaterials();
        value2 = getStudyUI2().getRelMaterials();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Related Materials");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

        value1 = getStudyUI1().getRelStudies();
        value2 = getStudyUI2().getRelStudies();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Related Studies");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

        value1 = getStudyUI1().getOtherRefs();
        value2 = getStudyUI2().getOtherRefs();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Other References");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

        value1 = getStudyUI1().getTimePeriodCovered();
        value2 = getStudyUI2().getTimePeriodCovered();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Time Period Covered");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getDateOfCollection();
        value2 = getStudyUI2().getDateOfCollection();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Date of Collection");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCountry();
        value2 = getStudyUI2().getMetadata().getCountry();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Country/Nation");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getGeographicCoverage();
        value2 = getStudyUI2().getMetadata().getGeographicCoverage();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Geographic Coverage");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getGeographicUnit();
        value2 = getStudyUI2().getMetadata().getGeographicUnit();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Geographic Unit");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getGeographicBoundings();
        value2 = getStudyUI2().getGeographicBoundings();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Geographic Bounding Box");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getUnitOfAnalysis();
        value2 = getStudyUI2().getMetadata().getUnitOfAnalysis();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Unit of Analysis");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getUniverse();
        value2 = getStudyUI2().getMetadata().getUniverse();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Universe");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getKindOfData();
        value2 = getStudyUI2().getMetadata().getKindOfData();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Kind of Data");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                abstractandscopeDiffList.add(idi);

            }
        }

    }

    private void initDatacollectionDifferencesList() {
        String value1;
        String value2;

        datacollectionDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getMetadata().getTimeMethod();
        value2 = getStudyUI2().getMetadata().getTimeMethod();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Time Method");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDataCollector();
        value2 = getStudyUI2().getMetadata().getDataCollector();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Data Collector");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getFrequencyOfDataCollection();
        value2 = getStudyUI2().getMetadata().getFrequencyOfDataCollection();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Frequency");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getSamplingProcedure();
        value2 = getStudyUI2().getMetadata().getSamplingProcedure();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Sampling Procedure");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDeviationsFromSampleDesign();
        value2 = getStudyUI2().getMetadata().getDeviationsFromSampleDesign();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Major Deviations for Sample Design");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCollectionMode();
        value2 = getStudyUI2().getMetadata().getCollectionMode();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Collection Mode");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getResearchInstrument();
        value2 = getStudyUI2().getMetadata().getResearchInstrument();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Type of Research Instrument");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDataSources();
        value2 = getStudyUI2().getMetadata().getDataSources();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Data Sources");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getOriginOfSources();
        value2 = getStudyUI2().getMetadata().getOriginOfSources();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Origin of Sources");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCharacteristicOfSources();
        value2 = getStudyUI2().getMetadata().getCharacteristicOfSources();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Characteristic of Sources Noted");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getAccessToSources();
        value2 = getStudyUI2().getMetadata().getAccessToSources();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Documentation and Access to Sources");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDataCollectionSituation();
        value2 = getStudyUI2().getMetadata().getDataCollectionSituation();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Characteristics of Data Collection Situation");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getActionsToMinimizeLoss();
        value2 = getStudyUI2().getMetadata().getActionsToMinimizeLoss();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Actions to Minimize Losses");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getControlOperations();
        value2 = getStudyUI2().getMetadata().getControlOperations();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Control Operations");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getWeighting();
        value2 = getStudyUI2().getMetadata().getWeighting();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Weighting");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCleaningOperations();
        value2 = getStudyUI2().getMetadata().getCleaningOperations();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Cleaning Operations");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getStudyLevelErrorNotes();
        value2 = getStudyUI2().getMetadata().getStudyLevelErrorNotes();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Study Level Error Notes");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getResponseRate();
        value2 = getStudyUI2().getMetadata().getResponseRate();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Response Rate");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getSamplingErrorEstimate();
        value2 = getStudyUI2().getMetadata().getSamplingErrorEstimate();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Estimates of Sampling Error ");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getOtherDataAppraisal();
        value2 = getStudyUI2().getMetadata().getOtherDataAppraisal();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Other Forms of Data Appraisal");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                datacollectionDiffList.add(idi);

            }
        }
    }

    private void initDataavailDifferencesList() {
        String value1;
        String value2;

        dataavailDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getMetadata().getPlaceOfAccess();
        value2 = getStudyUI2().getMetadata().getPlaceOfAccess();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Data Access Place");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                dataavailDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getOriginalArchive();
        value2 = getStudyUI2().getMetadata().getOriginalArchive();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Original Archive");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                dataavailDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getAvailabilityStatus();
        value2 = getStudyUI2().getMetadata().getAvailabilityStatus();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Availability Status");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                dataavailDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCollectionSize();
        value2 = getStudyUI2().getMetadata().getCollectionSize();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Size of Collection");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                dataavailDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getStudyCompletion();
        value2 = getStudyUI2().getMetadata().getStudyCompletion();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Study Completion");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                dataavailDiffList.add(idi);

            }
        }
    }

    private void initTermsofuseDifferencesList() {
        String value1;
        String value2;

        termsofuseDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getMetadata().getConfidentialityDeclaration();
        value2 = getStudyUI2().getMetadata().getConfidentialityDeclaration();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Confidentiality Declaration");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getSpecialPermissions();
        value2 = getStudyUI2().getMetadata().getSpecialPermissions();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Special Permissions");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getRestrictions();
        value2 = getStudyUI2().getMetadata().getRestrictions();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Restrictions");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getContact();
        value2 = getStudyUI2().getMetadata().getContact();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Contact");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getCitationRequirements();
        value2 = getStudyUI2().getMetadata().getCitationRequirements();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Citation Requirements");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDepositorRequirements();
        value2 = getStudyUI2().getMetadata().getDepositorRequirements();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Depositor Requirements");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getConditions();
        value2 = getStudyUI2().getMetadata().getConditions();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Conditions");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
        value1 = getStudyUI1().getMetadata().getDisclaimer();
        value2 = getStudyUI2().getMetadata().getDisclaimer();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Disclaimer");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                termsofuseDiffList.add(idi);

            }
        }
    }

    private void initNotesDifferencesList() {
        String value1;
        String value2;

        notesDiffList = new ArrayList<catalogInfoDifferenceItem>();

        catalogInfoDifferenceItem idi;

        // insert auto-generated code here:
        value1 = getStudyUI1().getNotes();
        value2 = getStudyUI2().getNotes();

        if (value1 != null || value2 != null) {
            if ((value1 != null && !value1.equals(value2)) || (value2 != null && !value2.equals(value1))) {

                if (value1 == null || value1.equals("")) {
                    value1 = "[Empty]";
                } else if (value2 == null || value2.equals("")) {
                    value2 = "[Empty]";
                }

                idi = new catalogInfoDifferenceItem();

                idi.setFieldName("Notes");
                idi.setFieldValue1(value1);
                idi.setFieldValue2(value2);

                notesDiffList.add(idi);

            }
        }
    }

    public boolean isEmpty(String s) {
        if (s == null || s.trim().equals("")) {
            return true;
        } else {
            return false;
        }
    }

    public class catalogInfoDifferenceItem {

        public catalogInfoDifferenceItem() {
        }

        private String fieldName;
        private String fieldValue1;
        private String fieldValue2;

        public String getFieldName() {
            return fieldName;
        }

        public void setFieldName(String fn) {
            this.fieldName = fn;
        }

        public String getFieldValue1() {
            return fieldValue1;
        }

        public void setFieldValue1(String fv) {
            this.fieldValue1 = fv;
        }

        public String getFieldValue2() {
            return fieldValue2;
        }

        public void setFieldValue2(String fv) {
            this.fieldValue2 = fv;
        }

    }

    public class studyFileDifferenceItem {

        public studyFileDifferenceItem() {
        }

        private String fileId;

        private String fileName1;
        private String fileType1;
        private String fileSize1;
        private String fileCat1;
        private String fileDesc1;

        private String fileName2;
        private String fileType2;
        private String fileSize2;
        private String fileCat2;
        private String fileDesc2;

        private boolean file1Empty = false;
        private boolean file2Empty = false;

        public String getFileId() {
            return fileId;
        }

        public void setFileId(String fid) {
            this.fileId = fid;
        }

        public String getFileName1() {
            return fileName1;
        }

        public void setFileName1(String fn) {
            this.fileName1 = fn;
        }

        public String getFileType1() {
            return fileType1;
        }

        public void setFileType1(String ft) {
            this.fileType1 = ft;
        }

        public String getFileSize1() {
            return fileSize1;
        }

        public void setFileSize1(String fs) {
            this.fileSize1 = fs;
        }

        public String getFileCat1() {
            return fileCat1;
        }

        public void setFileCat1(String fc) {
            this.fileCat1 = fc;
        }

        public String getFileDesc1() {
            return fileDesc1;
        }

        public void setFileDesc1(String fd) {
            this.fileDesc1 = fd;
        }

        public String getFileName2() {
            return fileName2;
        }

        public void setFileName2(String fn) {
            this.fileName2 = fn;
        }

        public String getFileType2() {
            return fileType2;
        }

        public void setFileType2(String ft) {
            this.fileType2 = ft;
        }

        public String getFileSize2() {
            return fileSize2;
        }

        public void setFileSize2(String fs) {
            this.fileSize2 = fs;
        }

        public String getFileCat2() {
            return fileCat2;
        }

        public void setFileCat2(String fc) {
            this.fileCat2 = fc;
        }

        public String getFileDesc2() {
            return fileDesc2;
        }

        public void setFileDesc2(String fd) {
            this.fileDesc2 = fd;
        }

        public boolean isFile1Empty() {
            return file1Empty;
        }

        public boolean isFile2Empty() {
            return file2Empty;
        }

        public void setFile1Empty(boolean state) {
            file1Empty = state;
        }

        public void setFile2Empty(boolean state) {
            file2Empty = state;
        }

    }

}