+++ /dev/null
-/*
- * 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()));
- }
-}