/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* 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.gatein.management.rest;
import org.gatein.management.api.ContentType;
import org.gatein.management.api.controller.ManagedResponse;
import org.json.JSONException;
import org.json.JSONObject;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author <a href="mailto:nscavell@redhat.com">Nick Scavelli</a>
* @version $Revision$
*/
public class FailureResponse implements ManagedResponse
{
private final String operationName;
private final Outcome outcome;
private final ContentType contentType;
public FailureResponse(final String failure, final String operationName, final ContentType contentType)
{
this.operationName = operationName;
this.outcome = new Outcome()
{
@Override
public boolean isSuccess()
{
return false;
}
@Override
public String getFailureDescription()
{
return failure;
}
};
this.contentType = contentType;
}
@Override
public Outcome getOutcome()
{
return outcome;
}
@Override
public Object getResult()
{
return null;
}
@Override
public void writeResult(OutputStream outputStream, boolean pretty) throws IOException
{
switch (contentType)
{
case JSON:
writeJson(outputStream, pretty);
break;
case XML:
writeXml(outputStream, pretty);
break;
default:
throw new IOException(contentType + " is not a supported content type for a failure.");
}
}
private void writeJson(OutputStream out, boolean pretty) throws IOException
{
try
{
JSONObject json = new JSONObject();
json.put("operationName", operationName);
json.put("failure", outcome.getFailureDescription());
String text = (pretty) ? json.toString(3) : json.toString();
out.write(text.getBytes());
out.write('\n');
}
catch (JSONException e)
{
throw new IOException("Exception writing failure response to json. The failure response message was '" + outcome.getFailureDescription() + "'", e);
}
}
private void writeXml(OutputStream out, boolean pretty) throws IOException
{
XMLStreamWriter writer;
try
{
writer = XMLOutputFactory.newInstance().createXMLStreamWriter(out);
}
catch (XMLStreamException e)
{
throw new IOException("Could not create XML streaming writer.", e);
}
try
{
writer.writeStartDocument("UTF-8", "1.0");
// root element <failureResult>
nl(writer, pretty);
writer.writeStartElement("failureResult");
nl(writer, pretty);
indent(writer, 1, pretty);
// <failure>
writer.writeStartElement("failure");
writer.writeCharacters(outcome.getFailureDescription());
writer.writeEndElement();
nl(writer, pretty);
indent(writer, 1, pretty);
// <operationName>
writer.writeStartElement("operationName");
writer.writeCharacters(operationName);
writer.writeEndElement();
nl(writer, pretty);
// </failureResult>
writer.writeEndElement();
// End document
writer.writeCharacters("\n");
writer.writeEndDocument();
writer.flush();
}
catch (XMLStreamException e)
{
throw new IOException("Exception writing failure response to XML. Failure response message was '" + outcome.getFailureDescription() + "'", e);
}
// finally
// {
// try
// {
// writer.close();
// }
// catch (XMLStreamException e)
// {
// // ignore
// }
// }
}
private static void nl(XMLStreamWriter writer, boolean pretty) throws XMLStreamException
{
if (pretty) writer.writeCharacters("\n");
}
private static void indent(XMLStreamWriter writer, int depth, boolean pretty) throws XMLStreamException
{
if (pretty)
{
for (int i = 0; i < depth; i++)
{
writer.writeCharacters(" ");
}
}
}
}