org.bonitasoft.forms.client.view.widget.FileDownloadWidget.java Source code

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Here is the source code for org.bonitasoft.forms.client.view.widget.FileDownloadWidget.java

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/**
 * Copyright (C) 2009 BonitaSoft S.A.
 * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.bonitasoft.forms.client.view.widget;

import java.util.Map;

import org.bonitasoft.forms.client.view.SupportedFieldTypes;
import org.bonitasoft.forms.client.view.common.RpcFormsServices;
import org.bonitasoft.forms.client.view.common.URLUtils;

import com.google.gwt.http.client.URL;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Image;

/**
 * Widget displaying a file download link
 *
 * @author Anthony Birembaut
 *
 */
public class FileDownloadWidget extends Composite {

    /**
     * the flow panel used to display the widgets
     */
    protected FlowPanel flowPanel;

    protected Anchor fileNameLabel;

    protected Image previewImage;

    protected long attachmentId;

    protected boolean hasImagePreview;

    private final String formID;

    private String imageServletURL;

    private final Map<String, Object> contextMap;

    private final String attachmentServletURL;

    private final String valueType;

    /**
     * Constructor
     *
     * @param contextMap
     * @param valueType
     * @param attachmentId
     * @param hasImagePreview
     */
    public FileDownloadWidget(final String formID, final Map<String, Object> contextMap, final String valueType,
            final long attachmentId, final boolean hasImagePreview) {

        this(formID, contextMap, valueType, attachmentId, hasImagePreview, null);
    }

    /**
     * Constructor
     *
     * @param contextMap
     *
     * @param taskUUIDStr
     * @param processUUIDStr
     * @param instanceUUIDStr
     * @param valueType
     * @param attachmentId
     * @param hasImagePreview
     * @param fileName
     */
    public FileDownloadWidget(final String formID, final Map<String, Object> contextMap, final String valueType,
            final long attachmentId, final boolean hasImagePreview, final String fileName) {

        this.hasImagePreview = hasImagePreview;
        this.attachmentId = attachmentId;
        this.formID = formID;
        this.contextMap = contextMap;
        this.valueType = valueType;

        flowPanel = new FlowPanel();
        attachmentServletURL = RpcFormsServices.getAttachmentDownloadURL();
        String downloadURL;
        if (SupportedFieldTypes.JAVA_FILE_CLASSNAME.equals(valueType)) {
            downloadURL = URLUtils.getInstance().getAttachmentURL(attachmentServletURL, formID, contextMap,
                    this.attachmentId, fileName);
        } else {
            downloadURL = fileName;
        }
        if (this.hasImagePreview) {
            previewImage = new Image();
            previewImage.setStyleName("bonita_image_preview");
            if (SupportedFieldTypes.JAVA_FILE_CLASSNAME.equals(valueType)) {
                imageServletURL = RpcFormsServices.getAttachmentImageURL();
                final String imageURL = URLUtils.getInstance().getAttachmentURL(imageServletURL, formID, contextMap,
                        this.attachmentId, fileName);
                if (fileName != null) {
                    previewImage.setUrl(imageURL);
                    previewImage.setTitle(fileName);
                }
            } else {
                if (fileName != null) {
                    previewImage.setUrl(fileName);
                }
            }
            flowPanel.add(previewImage);
        }
        fileNameLabel = new Anchor();
        fileNameLabel.setStyleName("bonita_download_link");
        if (fileName != null) {
            fileNameLabel.setHref(downloadURL);
            fileNameLabel.setText(fileName);
        }
        flowPanel.add(fileNameLabel);

        initWidget(flowPanel);
    }

    public void setFileName(final String fileName) {

        if (SupportedFieldTypes.JAVA_FILE_CLASSNAME.equals(valueType)) {
            if (hasImagePreview) {
                final String imageURL = URLUtils.getInstance().getAttachmentURL(imageServletURL, formID, contextMap,
                        attachmentId, fileName);
                previewImage.setUrl(imageURL);
                previewImage.setTitle(fileName);
            }
            final String downloadURL = URLUtils.getInstance().getAttachmentURL(attachmentServletURL, formID,
                    contextMap, attachmentId, fileName);
            fileNameLabel.setHref(downloadURL);
            fileNameLabel.setText(fileName);
        } else {
            if (hasImagePreview) {
                previewImage.setUrl(fileName);
            }
            fileNameLabel.setHref(fileName);
            fileNameLabel.setText(fileName);
        }
    }

    public void setFilePath(String filePath, final String realFileName) {
        filePath = URL.encodeQueryString(filePath);
        final String fileName = URL.encodeQueryString(realFileName);
        final String downloadURL = URLUtils.getInstance().getFileURL(attachmentServletURL, filePath, fileName);
        if (hasImagePreview) {
            final String imageURL = URLUtils.getInstance().getFileURL(imageServletURL, filePath, fileName);
            previewImage.setTitle(fileName);
            previewImage.setUrl(imageURL);
        }
        fileNameLabel.setHref(downloadURL);
        fileNameLabel.setText(realFileName);
    }

    public String getDisplayedValue() {
        final String displayedValue = fileNameLabel.getText();
        if (displayedValue != null && !displayedValue.isEmpty()) {
            return displayedValue;
        } else {
            return null;
        }
    }

    public void resetDownloadlink() {
        fileNameLabel.setHref((String) null);
        fileNameLabel.setText(null);
    }

}