de.kp.ames.web.function.transform.XslConsumer.java Source code

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Here is the source code for de.kp.ames.web.function.transform.XslConsumer.java

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package de.kp.ames.web.function.transform;
/**
 * This Java module is part of the
 *  Application Developer Framework
 *
 *  Project: AMES-Web-Service
 *  Package: de.kp.ames.web.function.transform
 *  Module: XslConsumer
 *  @author krusche@dr-kruscheundpartner.de
 *
 * Add your semantic annotations within the SemanticAssist tags and
 * mark them with a leading hashtag #:
 *
 * <SemanticAssist>
 *     #consumer #function #transform #web #xsl
 * </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.io.InputStream;
import java.util.ArrayList;

import javax.activation.DataHandler;

import org.freebxml.omar.client.xml.registry.infomodel.ExtrinsicObjectImpl;
import org.freebxml.omar.client.xml.registry.infomodel.RegistryObjectImpl;
import org.freebxml.omar.common.CanonicalSchemes;
import org.json.JSONObject;

import de.kp.ames.web.GlobalConstants;
import de.kp.ames.web.core.regrep.JaxrHandle;
import de.kp.ames.web.core.regrep.lcm.JaxrLCM;
import de.kp.ames.web.core.util.FileUtil;

public class XslConsumer extends JaxrLCM {

    private static String EXTRINSIC_OBJECT = CanonicalSchemes.CANONICAL_OBJECT_TYPE_ID_ExtrinsicObject;

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

    /**
     * Attach XSL result (stream) to the target object
     * 
     * @param target
     * @param stream
     * @return
     * @throws Exception
     */
    public String setRepositoryItem(String target, InputStream stream) throws Exception {
        /* 
         * Determine target object from unique identifier
         */
        RegistryObjectImpl ro = getRegistryObjectById(target);
        if (ro == null)
            throw new Exception("[XslConsumer] Target object not found.");

        String objectType = ro.getObjectType().getKey().getId();
        if (objectType.startsWith(EXTRINSIC_OBJECT)) {
            /*
             * The stream must be allocated to an existing extrinsic object
             */
            ExtrinsicObjectImpl eo = (ExtrinsicObjectImpl) ro;
            eo.setMimeType(GlobalConstants.MT_XML);

            /*
             * Create and set repository item
             */
            byte[] bytes = FileUtil.getByteArrayFromInputStream(stream);

            DataHandler handler = new DataHandler(
                    FileUtil.createByteArrayDataSource(bytes, GlobalConstants.MT_XML));
            eo.setRepositoryItem(handler);

            /*
             * Save extrinsic object
             */
            ArrayList<RegistryObjectImpl> objectsToSave = new ArrayList<RegistryObjectImpl>();
            objectsToSave.add(eo);

            saveObjects(objectsToSave, false, false);

            /*
             * Build response
             */
            JSONObject jResponse = new JSONObject();
            jResponse.put("uid", target);

            return jResponse.toString();

        } else {
            throw new Exception("[XslConsumer] The object type " + objectType + " is not supported.");

        }

    }

}