com.swordlord.gozer.databinding.DataBindingMember.java Source code

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Here is the source code for com.swordlord.gozer.databinding.DataBindingMember.java

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/*-----------------------------------------------------------------------------
**
** -Gozer is not Zuul-
**
** Copyright 2017 by SwordLord - the coding crew - https://www.swordlord.com/
**
** 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/>.
**
**-----------------------------------------------------------------------------
**
** $Id: DataBindingMember.java 1295 2011-12-15 15:41:02Z LordEidi $
**
-----------------------------------------------------------------------------*/

package com.swordlord.gozer.databinding;

import java.io.Serializable;
import java.util.LinkedList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.cayenne.map.ObjEntity;
import org.apache.cayenne.map.ObjRelationship;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.swordlord.jalapeno.DBConnection;

@SuppressWarnings("serial")
public class DataBindingMember implements Serializable {
    protected static final Log LOG = LogFactory.getLog(DataBindingMember.class);

    protected LinkedList<DataBindingElement> _dataBindingElements;
    protected String _strDataBindingMember;
    protected String _strBindingPathName;
    protected String _strTableName;

    public DataBindingMember(String strDataMember) {
        _strDataBindingMember = strDataMember;

        _dataBindingElements = new LinkedList<DataBindingElement>();

        parseBindingMember();
    }

    public String getDataBindingMemberWOField() {
        int position = _strDataBindingMember.lastIndexOf(".");
        return _strDataBindingMember.substring(0, position >= 0 ? position : _strDataBindingMember.length());
    }

    public LinkedList<DataBindingElement> getDataBindingElements() {
        return _dataBindingElements;
    }

    public String getDataBindingFieldName() {
        if (_dataBindingElements.size() == 0)
            return null;

        DataBindingElement element = _dataBindingElements.getLast();

        if (element.isField()) {
            return element.getPathElement();
        } else {
            return "";
        }
    }

    public String getDataBindingPathName() {
        if (_strBindingPathName == null) {
            _strBindingPathName = "";

            for (DataBindingElement element : _dataBindingElements) {
                if (!element.isField()) {
                    if (_strBindingPathName.length() > 0) {
                        _strBindingPathName += ".";
                    }

                    _strBindingPathName += element.getPathElement();
                }
            }
        }

        return _strBindingPathName;
    }

    public String getDataBindingTableName() {
        if (_strTableName == null) {
            _strTableName = resolveTableName(getDataBindingElements(), getDataBindingRootTableName());
        }

        return _strTableName;
    }

    private String resolveTableName(LinkedList<DataBindingElement> elements, String strTableName) {
        // if there are no elements or only one, then this element must be the table name
        if ((elements == null) || (elements.size() <= 1)) {
            return strTableName;
        }

        // otherwise walk the references to find the table

        ObjEntity parentTable = DBConnection.instance().getObjectContext().getEntityResolver()
                .getObjEntity(strTableName);

        for (DataBindingElement element : elements) {
            if (!element.isField()) {
                String strPathElement = element.getPathElement();
                LOG.debug("TableName/PatheElement=" + strTableName + "/" + strPathElement);

                // ignore the same level
                if (strPathElement.compareToIgnoreCase(strTableName) != 0) {
                    ObjRelationship rel = (ObjRelationship) parentTable.getRelationship(strPathElement);
                    parentTable = (ObjEntity) rel.getTargetEntity();
                }
            }
        }

        return parentTable.getName();
    }

    public String getDataBindingRootTableName() {
        if (_dataBindingElements.size() > 0) {
            DataBindingElement element = _dataBindingElements.getFirst();
            return element.getPathElement();
        } else {
            return "";
        }
    }

    public String getRelativePathWithField() {
        String strPath = getDataBindingPathName();
        if ((strPath != null) && (strPath.length() > 0)) {
            strPath += ".";

            String strTableName = getDataBindingRootTableName() + ".";
            strPath = strPath.replace(strTableName, "");
        }

        strPath += getDataBindingFieldName();

        return strPath;
    }

    // @Table{Filter}[Position].Reference{Filter}[Position].Field
    private void parseBindingMember() {
        // probably throw error in this case? -> no. DataBinding can be NULL!
        if (_strDataBindingMember == null) {
            return;
        }

        Pattern pattern = Pattern.compile(
                "^(@)?([a-z_0-9]*)(\\{[(\\?)?a-z_0-9,:='%\\s@\\[\\]\\(\\)]*\\})?(\\[[0-9]*\\])?$",
                Pattern.CASE_INSENSITIVE | Pattern.MULTILINE);

        String[] bmElements = _strDataBindingMember.split("\\.");
        if (bmElements.length == 0) {
            LOG.error("Split of binding member return 0 elements: " + _strDataBindingMember);
            return;
        }

        // reset this, is no problem since works with lazy initialisation
        _strBindingPathName = null;
        int iElement = 0;

        for (String strBindingMemberElement : bmElements) {
            Matcher matcher = pattern.matcher(strBindingMemberElement);

            if (!matcher.find()) {
                LOG.error("DataBinding parser can't parse binding member: " + strBindingMemberElement);
                return;
            }

            if (matcher.groupCount() != 4) {
                LOG.error("Wrong group count during parsing of binding member element: " + strBindingMemberElement
                        + " in binding member: " + _strDataBindingMember);
                return;
            }

            DataBindingElement element = new DataBindingElement();

            element.setPathElement(matcher.group(2));

            String strFilter = matcher.group(3);
            if ((strFilter != null) && (strFilter.length() > 2)) {
                try {
                    element.setFilter(strFilter.substring(1, strFilter.length() - 1));
                } catch (IndexOutOfBoundsException e) {
                    LOG.error("strFilter is defect: " + strFilter);
                    LOG.debug(e.getMessage());
                    return;
                }
            }

            String strRowNumber = matcher.group(4);
            if ((strRowNumber != null) && (strRowNumber.length() > 2)) {
                try {
                    element.setRowNumber(Integer.parseInt(strRowNumber.substring(1, strRowNumber.length() - 1)));
                } catch (NumberFormatException e) {
                    LOG.error("RowNumber is not of type integer: " + strRowNumber);
                    LOG.debug(e.getMessage());
                    return;
                } catch (IndexOutOfBoundsException e) {
                    LOG.error("RowNumber is defect: " + strRowNumber);
                    LOG.debug(e.getMessage());
                    return;
                }
            } else {
                if (iElement < bmElements.length - 1) {
                    // wrong syntax, add 0 on our own
                    element.setRowNumber(0);
                    //element.isField(true);
                } else {
                    element.setField(true);
                }
            }

            _dataBindingElements.add(element);

            iElement++;
        }
    }

    @Override
    public String toString() {
        return _strDataBindingMember;
    }
}