/*
* DSpaceOREGenerator.java
*
* Version: $Revision: 1.0 $
*
* Date: $Date: 2008/06/30 05:30:55 $
*
* Copyright (c) 2002, Hewlett-Packard Company and Massachusetts
* Institute of Technology. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the Hewlett-Packard Company nor the name of the
* Massachusetts Institute of Technology nor the names of their
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.dspace.app.xmlui.cocoon;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.http.HttpServletResponse;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.ResourceNotFoundException;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.generation.AbstractGenerator;
import org.dspace.app.xmlui.objectmanager.AbstractAdapter;
import org.dspace.app.xmlui.objectmanager.ContainerAdapter;
import org.dspace.app.xmlui.objectmanager.ItemAdapter;
import org.dspace.app.xmlui.objectmanager.RepositoryAdapter;
import org.dspace.app.xmlui.utils.ContextUtil;
import org.dspace.app.xmlui.wing.WingException;
import org.dspace.authorize.AuthorizeException;
import org.dspace.content.Collection;
import org.dspace.content.Community;
import org.dspace.content.DSpaceObject;
import org.dspace.content.Item;
import org.dspace.content.crosswalk.CrosswalkException;
import org.dspace.content.crosswalk.DisseminationCrosswalk;
import org.dspace.core.ConfigurationManager;
import org.dspace.core.Context;
import org.dspace.core.LogManager;
import org.dspace.core.PluginManager;
import org.dspace.handle.HandleManager;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.output.SAXOutputter;
import org.xml.sax.SAXException;
/**
* Generate an ORE aggregation of a DSpace Item. The object to be rendered should be an item identified by pasing
* in one of the two parameters: handle or internal. The fragment parameter determines the encoding format for
* the aggregation; only Atom is supported at this time.
* @author Alexey Maslov
*/
public class DSpaceOREGenerator extends AbstractGenerator
{
/**
* Generate the ORE Aggregation.
*/
public void generate() throws IOException, SAXException,
ProcessingException {
try {
// Grab the context.
Context context = ContextUtil.obtainContext(objectModel);
Item item = getItem(context);
if (item == null)
throw new ResourceNotFoundException("Unable to locate object.");
// Instantiate and execute the ORE plugin
SAXOutputter out = new SAXOutputter(contentHandler);
DisseminationCrosswalk xwalk = (DisseminationCrosswalk)PluginManager.getNamedPlugin(DisseminationCrosswalk.class,"ore");
Element ore = xwalk.disseminateElement(item);
out.output(ore);
/* Generate the METS document
contentHandler.startDocument();
adapter.renderMETS(contentHandler,lexicalHandler);
contentHandler.endDocument();*/
} catch (JDOMException je) {
throw new ProcessingException(je);
} catch (AuthorizeException ae) {
throw new ProcessingException(ae);
} catch (CrosswalkException ce) {
throw new ProcessingException(ce);
} catch (SQLException sqle) {
throw new ProcessingException(sqle);
}
}
private Item getItem(Context context) throws SQLException, CrosswalkException
{
Request request = ObjectModelHelper.getRequest(objectModel);
String contextPath = request.getContextPath();
// Determine the correct adatper to use for this item
String handle = parameters.getParameter("handle",null);
String internal = parameters.getParameter("internal",null);
if (handle != null)
{
// Specified using a regular handle.
DSpaceObject dso = HandleManager.resolveToObject(context, handle);
// Handles can be either items or containers.
if (dso instanceof Item)
return (Item)dso;
else
throw new CrosswalkException("ORE dissemination only available for DSpace Items.");
}
else if (internal != null)
{
// Internal identifier, format: "type:id".
String[] parts = internal.split(":");
if (parts.length == 2)
{
String type = parts[0];
int id = Integer.valueOf(parts[1]);
if ("item".equals(type))
{
Item item = Item.find(context,id);
return item;
}
else
throw new CrosswalkException("ORE dissemination only available for DSpace Items.");
}
}
return null;
}
}