2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.nettyutil.handler;
10 import com.google.common.base.Preconditions;
11 import com.siemens.ct.exi.api.sax.SAXEncoder;
12 import com.siemens.ct.exi.exceptions.EXIException;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.ByteBufOutputStream;
15 import io.netty.channel.ChannelHandlerContext;
16 import io.netty.handler.codec.MessageToByteEncoder;
17 import java.io.IOException;
18 import java.io.OutputStream;
19 import javax.xml.transform.Transformer;
20 import javax.xml.transform.TransformerException;
21 import javax.xml.transform.dom.DOMSource;
22 import javax.xml.transform.sax.SAXResult;
23 import org.opendaylight.netconf.api.NetconfMessage;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
27 public final class NetconfMessageToEXIEncoder extends MessageToByteEncoder<NetconfMessage> {
28 private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageToEXIEncoder.class);
29 private final NetconfEXICodec codec;
31 private NetconfMessageToEXIEncoder(final NetconfEXICodec codec) {
32 this.codec = Preconditions.checkNotNull(codec);
35 public static NetconfMessageToEXIEncoder create(final NetconfEXICodec codec) {
36 return new NetconfMessageToEXIEncoder(codec);
40 protected void encode(final ChannelHandlerContext ctx, final NetconfMessage msg, final ByteBuf out)
41 throws IOException, TransformerException, EXIException {
42 LOG.trace("Sent to encode : {}", msg);
44 try (OutputStream os = new ByteBufOutputStream(out)) {
45 final SAXEncoder encoder = codec.getWriter();
46 encoder.setOutputStream(os);
47 final Transformer transformer = ThreadLocalTransformers.getDefaultTransformer();
48 transformer.transform(new DOMSource(msg.getDocument()), new SAXResult(encoder));