Java tutorial
/* * Copyright 2013-2018 Lilinfeng. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.tiger.netty.http.xml.codec; import com.thoughtworks.xstream.XStream; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandler; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelPipeline; import io.netty.handler.codec.MessageToMessageDecoder; import java.io.StringReader; import java.nio.charset.Charset; import org.tiger.netty.http.xml.bean.Order; /** * @author Lilinfeng * @date 201431 * @version 1.0 */ public abstract class AbstractHttpXmlDecoder<T> extends MessageToMessageDecoder<T> { private StringReader reader; private Class<?> clazz; private boolean isPrint; private final static String CHARSET_NAME = "UTF-8"; private final static Charset UTF_8 = Charset.forName(CHARSET_NAME); protected AbstractHttpXmlDecoder(Class<?> clazz) { this(clazz, false); } protected AbstractHttpXmlDecoder(Class<?> clazz, boolean isPrint) { this.clazz = clazz; this.isPrint = isPrint; } protected Object decode0(ChannelHandlerContext arg0, ByteBuf body) throws Exception { String content = body.toString(UTF_8); XStream xs = new XStream(); xs.processAnnotations(Order.class);//Hotel.class Order result = (Order) xs.fromXML(content); /*factory = BindingDirectory.getFactory(clazz); if (isPrint) System.out.println("The body is : " + content); reader = new StringReader(content); IUnmarshallingContext uctx = factory.createUnmarshallingContext(); Object result = uctx.unmarshalDocument(reader); reader.close(); reader = null;*/ return result; } /** * Calls {@link ChannelHandlerContext#fireExceptionCaught(Throwable)} to * forward to the next {@link ChannelHandler} in the {@link ChannelPipeline} * . * * Sub-classes may override this method to change behavior. */ @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { // ? if (reader != null) { reader.close(); reader = null; } } }