de.kp.ames.web.function.dms.DmsDQM.java Source code

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Here is the source code for de.kp.ames.web.function.dms.DmsDQM.java

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package de.kp.ames.web.function.dms;
/**
 * This Java module is part of the
 *  Application Developer Framework
 *
 *  Project: AMES-Web-Service
 *  Package: de.kp.ames.web.function.dms
 *  Module: DmsDQM
 *  @author krusche@dr-kruscheundpartner.de
 *
 * Add your semantic annotations within the SemanticAssist tags and
 * mark them with a leading hashtag #:
 *
 * <SemanticAssist>
 *     #dms #dqm #function #web
 * </SemanticAssist>
 *
 */

/**
 *   Copyright 2012 Dr. Krusche & Partner PartG
 *
 *   AMES-Web-Service 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 3 of 
 *   the License, or (at your option) any later version.
 *
 *   AMES- Web-Service 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 software. If not, see <http://www.gnu.org/licenses/>.
 *
 */

import java.awt.image.BufferedImage;
import java.io.InputStream;
import java.util.List;

import javax.activation.DataHandler;
import javax.imageio.ImageIO;

import org.freebxml.omar.client.xml.registry.infomodel.ExtrinsicObjectImpl;
import org.freebxml.omar.client.xml.registry.infomodel.RegistryObjectImpl;
import org.json.JSONArray;

import de.kp.ames.web.core.graphics.GraphicsUtil;
import de.kp.ames.web.core.regrep.JaxrHandle;
import de.kp.ames.web.core.regrep.dqm.JaxrDQM;
import de.kp.ames.web.core.util.FileUtil;
import de.kp.ames.web.core.util.ImageUtil;
import de.kp.ames.web.function.dms.cache.DmsDocument;
import de.kp.ames.web.function.dms.cache.DmsImage;
import de.kp.ames.web.function.dms.cache.DocumentCacheManager;
import de.kp.ames.web.function.dms.cache.ImageCacheManager;
import de.kp.ames.web.function.domain.JsonBusinessProvider;
import de.kp.ames.web.shared.constants.ClassificationConstants;

public class DmsDQM extends JaxrDQM {

    /**
     * Constructor
     * 
     * @param jaxrHandle
     */
    public DmsDQM(JaxrHandle jaxrHandle) {
        super(jaxrHandle);
    }

    /**
     * Get either single documents or all
     * registered documents
     * 
     * @param item
     * @return
     * @throws Exception
     */
    public JSONArray getDocuments(String item) throws Exception {

        /*
         * Determine documents
         */
        List<RegistryObjectImpl> documents = getRegistryObjects_ByClasNode(item,
                ClassificationConstants.FNC_ID_Document);

        /*
         * Build JSON representation
         */
        return JsonBusinessProvider.getDocuments(jaxrHandle, documents);

    }

    /**
     * Get either single images or all
     * registered images
     * 
     * @param item
     * @return
     * @throws Exception
     */
    public JSONArray getImages(String item) throws Exception {

        /*
         * Determine images
         */
        List<RegistryObjectImpl> images = getRegistryObjects_ByClasNode(item, ClassificationConstants.FNC_ID_Image);

        /*
         * Build JSON representation
         */
        return JsonBusinessProvider.getImages(jaxrHandle, images);

    }

    /**
     * @param item
     * @return
     * @throws Exception
     */
    public ImageUtil getImage(String item) throws Exception {

        ImageCacheManager cacheManager = ImageCacheManager.getInstance();
        DmsImage cacheEntry = (DmsImage) cacheManager.getFromCache(item);

        BufferedImage image = null;
        String fileName = null;
        String mimetype = null;

        if (cacheEntry == null) {

            ExtrinsicObjectImpl eo = (ExtrinsicObjectImpl) getRegistryObjectById(item);
            if (eo == null)
                throw new Exception("[DmsDQM] An image with id <" + item + "> does not exist.");

            mimetype = eo.getMimeType();
            fileName = eo.getDisplayName();

            if ((mimetype != null) && mimetype.startsWith("image")) {

                DataHandler handler = eo.getRepositoryItem();
                image = ImageIO.read(handler.getInputStream());

                ImageUtil imageUtil = new ImageUtil(GraphicsUtil.createSource(image), mimetype);
                imageUtil.setFileName(fileName);
                return imageUtil;
            } else {
                return null;
            }

        } else {

            image = cacheEntry.getImage();
            mimetype = cacheEntry.getMimetype();
            fileName = cacheEntry.getName();

            ImageUtil imageUtil = new ImageUtil(GraphicsUtil.createSource(image), mimetype);
            imageUtil.setFileName(fileName);
            return imageUtil;

        }

    }

    /**
     * @param item
     * @return
     * @throws Exception
     */
    public FileUtil getDocument(String item) throws Exception {

        DocumentCacheManager cacheManager = DocumentCacheManager.getInstance();
        DmsDocument cacheEntry = (DmsDocument) cacheManager.getFromCache(item);

        FileUtil file = null;
        if (cacheEntry == null) {

            ExtrinsicObjectImpl eo = (ExtrinsicObjectImpl) getRegistryObjectById(item);
            if (eo == null)
                throw new Exception("[DmsDQM] A document with id <" + item + "> does not exist.");

            String mimetype = eo.getMimeType();
            String fileName = eo.getDisplayName();

            DataHandler handler = eo.getRepositoryItem();
            InputStream stream = handler.getInputStream();

            file = new FileUtil(stream, mimetype);
            file.setFilename(fileName);

        } else {
            file = cacheEntry.asFile();
            file.setFilename(cacheEntry.getName());

        }

        return file;
    }

}