/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.rest.ext.provider;
import org.exoplatform.container.ExoContainer;
import org.exoplatform.container.ExoContainerContext;
import org.exoplatform.services.xml.transform.NotSupportedIOTypeException;
import org.exoplatform.services.xml.transform.impl.trax.TRAXTemplatesServiceImpl;
import org.exoplatform.services.xml.transform.trax.TRAXTemplates;
import org.exoplatform.services.xml.transform.trax.TRAXTemplatesService;
import org.exoplatform.services.xml.transform.trax.TRAXTransformer;
import java.io.IOException;
import java.io.OutputStream;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.StreamingOutput;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.stream.StreamResult;
/**
* This type should be used by resource methods when need to apply XSLT
* transformation for returned {@link Source}.
*
* @see StreamingOutput
* @author <a href="dkatayev@gmail.com">Dmytro Katayev</a>
* @version $Id: XLSTStreamingOutPut.java
*/
public class XSLTStreamingOutput implements StreamingOutput
{
private String schemeName;
private Source source;
/**
* XSLTStreamingOutput constructor.
*
* @param schemeName XLST scheme name. Must be registered in
* {@link org.exoplatform.services.xml.transform.impl.trax.TRAXTemplatesLoaderPlugin
* TRAXTemplatesLoaderPlugin }
* @param source entity to write into output stream.
*/
public XSLTStreamingOutput(String schemeName, Source source)
{
this.schemeName = schemeName;
this.source = source;
}
/**
* {@inheritDoc} .
*/
public void write(OutputStream outStream) throws IOException, WebApplicationException
{
ExoContainer container = ExoContainerContext.getCurrentContainer();
TRAXTemplatesService templatesService =
(TRAXTemplatesService)container.getComponentInstanceOfType(TRAXTemplatesServiceImpl.class);
try
{
TRAXTransformer transformer = null;
if (schemeName != null)
{
TRAXTemplates t = templatesService.getTemplates(schemeName);
if (t == null)
{
String msg = "Template " + schemeName + " not found.";
throw new IllegalArgumentException(msg);
}
transformer = t.newTransformer();
}
else
{
String msg = "XSLT scheme name is null.";
throw new NullPointerException(msg);
}
transformer.initResult(new StreamResult(outStream));
transformer.transform(source);
}
catch (TransformerConfigurationException tce)
{
throw new IOException("Can't write to output stream " + tce);
}
catch (NotSupportedIOTypeException nse)
{
throw new IOException("Can't write to output stream " + nse);
}
catch (TransformerException tre)
{
throw new IOException("Can't write to output stream " + tre);
}
}
}