BUG-472: Add EXI codecs without wiring them

[controller.git] / opendaylight / netconf / netconf-util / src / main / java / org / opendaylight / controller / netconf / util / handler / NetconfMessageToEXIEncoder.java

diff --git a/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/NetconfMessageToEXIEncoder.java b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/NetconfMessageToEXIEncoder.java
new file mode 100644 (file)
index 0000000..70d9c2b
--- /dev/null
+++ b/opendaylight/netconf/netconf-util/src/main/java/org/opendaylight/controller/netconf/util/handler/NetconfMessageToEXIEncoder.java
@@ -0,0 +1,46 @@
+/*
+ * 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.util.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.OutputStream;
+
+import javax.xml.transform.Transformer;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.sax.SAXResult;
+import javax.xml.transform.sax.SAXTransformerFactory;
+
+import org.opendaylight.controller.netconf.api.NetconfMessage;
+import org.openexi.sax.Transmogrifier;
+
+import com.google.common.base.Preconditions;
+
+public final class NetconfMessageToEXIEncoder extends MessageToByteEncoder<NetconfMessage> {
+    private static final SAXTransformerFactory saxTransformerFactory = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
+
+    private final NetconfEXICodec codec;
+
+    public NetconfMessageToEXIEncoder(final NetconfEXICodec codec) {
+        this.codec = Preconditions.checkNotNull(codec);
+    }
+
+    @Override
+    protected void encode(ChannelHandlerContext ctx, NetconfMessage msg, ByteBuf out) throws Exception {
+        try (final OutputStream os = new ByteBufOutputStream(out)) {
+            final Transmogrifier transmogrifier = codec.getTransmogrifier();
+            transmogrifier.setOutputStream(os);
+
+            final Transformer transformer = saxTransformerFactory.newTransformer();
+            transformer.transform(new DOMSource(msg.getDocument()), new SAXResult(transmogrifier.getSAXTransmogrifier()));
+        }
+    }
+}