/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.vysper.mina.codec;
import java.nio.charset.CharsetEncoder;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.service.IoHandler;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoder;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;
import org.apache.vysper.charset.CharsetUtil;
import org.apache.vysper.mina.XmppIoHandlerAdapter;
import org.apache.vysper.xml.fragment.Renderer;
import org.apache.vysper.xmpp.stanza.Stanza;
import org.apache.vysper.xmpp.writer.StanzaWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* connects MINA low level protocol and session stanza writer
*
* @author The Apache MINA Project (dev@mina.apache.org)
*/
public class StanzaWriterProtocolEncoder implements ProtocolEncoder {
private final Logger logger = LoggerFactory.getLogger(StanzaWriterProtocolEncoder.class);
public void encode(IoSession ioSession, Object o, ProtocolEncoderOutput protocolEncoderOutput) throws Exception {
if (!(o instanceof StanzaWriteInfo)) {
throw new IllegalArgumentException("StanzaWriterProtocolEncoder only handles StanzaWriteInfo objects");
}
StanzaWriteInfo stanzaWriteInfo = (StanzaWriteInfo) o;
Stanza element = stanzaWriteInfo.getStanza();
Renderer renderer = new Renderer(element);
IoBuffer byteBuffer = IoBuffer.allocate(16).setAutoExpand(true);
if (stanzaWriteInfo.isWriteProlog())
byteBuffer.putString(StanzaWriter.XML_PROLOG, getSessionEncoder());
if (stanzaWriteInfo.isWriteOpeningElement())
byteBuffer.putString(renderer.getOpeningElement(), getSessionEncoder());
if (stanzaWriteInfo.isWriteContent())
byteBuffer.putString(renderer.getElementContent(), getSessionEncoder());
if (stanzaWriteInfo.isWriteClosingElement())
byteBuffer.putString(renderer.getClosingElement(), getSessionEncoder());
byteBuffer.flip();
protocolEncoderOutput.write(byteBuffer);
}
public void dispose(IoSession ioSession) throws Exception {
final IoHandler handler = ioSession.getHandler();
if (handler instanceof XmppIoHandlerAdapter) {
XmppIoHandlerAdapter xmppIoHandlerAdapter = (XmppIoHandlerAdapter)handler;
xmppIoHandlerAdapter.sessionClosed(ioSession);
logger.debug("terminated and disposed session id = " + ioSession.getId());
} else {
logger.warn("unhandled StanzaWriterProtocolEncoder.dispose()");
}
}
public CharsetEncoder getSessionEncoder() {
return CharsetUtil.UTF8_ENCODER;
}
}