Bug 624 - Separate netty and exi specific classes from netconf-util.

[controller.git] / opendaylight / netconf / netconf-netty-util / src / main / java / org / opendaylight / controller / netconf / nettyutil / handler / NetconfMessageToXMLEncoder.java

diff --git a/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToXMLEncoder.java b/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToXMLEncoder.java
new file mode 100644 (file)
index 0000000..fae2000
--- /dev/null
+++ b/opendaylight/netconf/netconf-netty-util/src/main/java/org/opendaylight/controller/netconf/nettyutil/handler/NetconfMessageToXMLEncoder.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.netconf.nettyutil.handler;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufOutputStream;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToByteEncoder;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.opendaylight.controller.netconf.api.NetconfMessage;
+import org.opendaylight.controller.netconf.util.xml.XmlUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Comment;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Optional;
+
+public class NetconfMessageToXMLEncoder extends MessageToByteEncoder<NetconfMessage> {
+    private static final Logger LOG = LoggerFactory.getLogger(NetconfMessageToXMLEncoder.class);
+    private static final TransformerFactory FACTORY = TransformerFactory.newInstance();
+
+    private final Optional<String> clientId;
+
+    public NetconfMessageToXMLEncoder() {
+        this(Optional.<String>absent());
+    }
+
+    public NetconfMessageToXMLEncoder(Optional<String> clientId) {
+        this.clientId = clientId;
+    }
+
+    @Override
+    @VisibleForTesting
+    public void encode(ChannelHandlerContext ctx, NetconfMessage msg, ByteBuf out) throws IOException, TransformerException {
+        LOG.trace("Sent to encode : {}", XmlUtil.toString(msg.getDocument()));
+
+        if (clientId.isPresent()) {
+            Comment comment = msg.getDocument().createComment("clientId:" + clientId.get());
+            msg.getDocument().appendChild(comment);
+        }
+
+        try (OutputStream os = new ByteBufOutputStream(out)) {
+            Transformer transformer = FACTORY.newTransformer();
+            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
+
+            StreamResult result = new StreamResult(new OutputStreamWriter(os));
+            DOMSource source = new DOMSource(msg.getDocument());
+            transformer.transform(source, result);
+        }
+    }
+}