/**
* Copyright (C) 2003-2008 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* 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.etk.core.rest.impl.provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.etk.common.logging.Logger;
import org.etk.core.rest.provider.EntityProvider;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
* @version $Id: $
*/
@Provider
@Consumes({ MediaType.APPLICATION_XML, MediaType.TEXT_XML, MediaType.APPLICATION_XHTML_XML })
@Produces({ MediaType.APPLICATION_XML, MediaType.TEXT_XML, MediaType.APPLICATION_XHTML_XML })
public class DOMSourceEntityProvider implements EntityProvider<DOMSource> {
/**
* Logger.
*/
private static final Logger LOG = Logger.getLogger(DOMSourceEntityProvider.class);
/**
* {@inheritDoc}
*/
public boolean isReadable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return type == DOMSource.class;
}
/**
* {@inheritDoc}
*/
public DOMSource readFrom(Class<DOMSource> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException {
try {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
Document d = factory.newDocumentBuilder().parse(entityStream);
return new DOMSource(d);
} catch (SAXParseException saxpe) {
// if can't read from stream (e.g. steam is empty)
if (LOG.isDebugEnabled())
saxpe.printStackTrace();
return null;
} catch (SAXException saxe) {
throw new IOException("Can't read from input stream " + saxe);
} catch (ParserConfigurationException pce) {
throw new IOException("Can't read from input stream " + pce);
}
}
/**
* {@inheritDoc}
*/
public long getSize(DOMSource t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return -1;
}
/**
* {@inheritDoc}
*/
public boolean isWriteable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return DOMSource.class.isAssignableFrom(type);
}
/**
* {@inheritDoc}
*/
public void writeTo(DOMSource t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException {
StreamResult out = new StreamResult(entityStream);
try {
TransformerFactory.newInstance().newTransformer().transform(t, out);
} catch (TransformerConfigurationException e) {
throw new IOException("Can't write to output stream " + e);
} catch (TransformerException e) {
throw new IOException("Can't write to output stream " + e);
} catch (TransformerFactoryConfigurationError e) {
throw new IOException("Can't write to output stream " + e);
}
}
}