X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=tests%2Fhoneynode%2Fnetconf-netty-util%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fnetconf%2Fnettyutil%2Fhandler%2FNetconfEXIToMessageDecoder.java;fp=tests%2Fhoneynode%2Fnetconf-netty-util%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fnetconf%2Fnettyutil%2Fhandler%2FNetconfEXIToMessageDecoder.java;h=1ddacb8bb512f9b1abc0c5df3e4f2236723af36b;hb=73d276ca887159c41a0877c2250d54b42e7fd64c;hp=0000000000000000000000000000000000000000;hpb=57e20793c55e43ed6bbec42e3304b9a37a1ff2f5;p=transportpce.git

diff --git a/tests/honeynode/netconf-netty-util/src/main/java/org/opendaylight/netconf/nettyutil/handler/NetconfEXIToMessageDecoder.java b/tests/honeynode/netconf-netty-util/src/main/java/org/opendaylight/netconf/nettyutil/handler/NetconfEXIToMessageDecoder.java
new file mode 100644
index 000000000..1ddacb8bb
--- /dev/null
+++ b/tests/honeynode/netconf-netty-util/src/main/java/org/opendaylight/netconf/nettyutil/handler/NetconfEXIToMessageDecoder.java
@@ -0,0 +1,102 @@
+/*
+ * 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.netconf.nettyutil.handler;
+
+import static java.util.Objects.requireNonNull;
+
+import com.siemens.ct.exi.core.exceptions.EXIException;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufInputStream;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.ByteToMessageDecoder;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.TransformerFactoryConfigurationError;
+import javax.xml.transform.dom.DOMResult;
+import javax.xml.transform.sax.SAXTransformerFactory;
+import javax.xml.transform.sax.TransformerHandler;
+import org.opendaylight.netconf.api.NetconfMessage;
+import org.opendaylight.yangtools.util.xml.UntrustedXML;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.Document;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+
+public final class NetconfEXIToMessageDecoder extends ByteToMessageDecoder {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NetconfEXIToMessageDecoder.class);
+    private static final SAXTransformerFactory FACTORY;
+
+    static {
+        final TransformerFactory f = SAXTransformerFactory.newInstance();
+        if (!f.getFeature(SAXTransformerFactory.FEATURE)) {
+            throw new TransformerFactoryConfigurationError(
+                    String.format("Factory %s is not a SAXTransformerFactory", f));
+        }
+
+        FACTORY = (SAXTransformerFactory)f;
+    }
+
+    /**
+     * This class is not marked as shared, so it can be attached to only a single channel,
+     * which means that {@link #decode(ChannelHandlerContext, ByteBuf, List)}
+     * cannot be invoked concurrently. Hence we can reuse the reader.
+     */
+    private final XMLReader reader;
+    private final DocumentBuilder documentBuilder;
+
+    private NetconfEXIToMessageDecoder(final XMLReader reader) {
+        this.reader = requireNonNull(reader);
+        this.documentBuilder = UntrustedXML.newDocumentBuilder();
+    }
+
+    public static NetconfEXIToMessageDecoder create(final NetconfEXICodec codec) throws EXIException {
+        return new NetconfEXIToMessageDecoder(codec.getReader());
+    }
+
+    @Override
+    protected void decode(final ChannelHandlerContext ctx, final ByteBuf in, final List<Object> out)
+            throws IOException, SAXException, TransformerConfigurationException {
+        /*
+         * Note that we could loop here and process all the messages, but we can't do that.
+         * The reason is <stop-exi> operation, which has the contract of immediately stopping
+         * the use of EXI, which means the next message needs to be decoded not by us, but rather
+         * by the XML decoder.
+         */
+
+        // If empty Byte buffer is passed to r.parse, EOFException is thrown
+        if (!in.isReadable()) {
+            LOG.debug("No more content in incoming buffer.");
+            return;
+        }
+
+        if (LOG.isTraceEnabled()) {
+            LOG.trace("Received to decode: {}", ByteBufUtil.hexDump(in));
+        }
+
+        final TransformerHandler handler = FACTORY.newTransformerHandler();
+        reader.setContentHandler(handler);
+
+        final DOMResult domResult = new DOMResult(documentBuilder.newDocument());
+        handler.setResult(domResult);
+
+        try (InputStream is = new ByteBufInputStream(in)) {
+            // Performs internal reset before doing anything
+            reader.parse(new InputSource(is));
+        }
+
+        out.add(new NetconfMessage((Document) domResult.getNode()));
+    }
+}