Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 com.google.code.or.net.impl.packet; import java.io.IOException; import org.apache.commons.lang.builder.ToStringBuilder; import org.apache.commons.lang.builder.ToStringStyle; import com.google.code.or.common.glossary.UnsignedLong; import com.google.code.or.io.util.XDeserializer; import com.google.code.or.io.util.XSerializer; import com.google.code.or.net.Packet; /** * * @author Jingqi Xu */ public class ResultSetHeaderPacket extends AbstractPacket { // private static final long serialVersionUID = -5491186291875548645L; // private UnsignedLong fieldCount; private UnsignedLong extra; /** * */ @Override public String toString() { return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE).append("fieldCount", fieldCount) .append("extra", extra).toString(); } /** * */ public byte[] getPacketBody() { final XSerializer s = new XSerializer(32); s.writeUnsignedLong(this.fieldCount); if (this.extra != null) s.writeUnsignedLong(this.extra); return s.toByteArray(); } /** * */ public UnsignedLong getFieldCount() { return fieldCount; } public void setFieldCount(UnsignedLong fieldCount) { this.fieldCount = fieldCount; } public UnsignedLong getExtra() { return extra; } public void setExtra(UnsignedLong extra) { this.extra = extra; } /** * */ public static ResultSetHeaderPacket valueOf(Packet packet) throws IOException { final XDeserializer d = new XDeserializer(packet.getPacketBody()); final ResultSetHeaderPacket r = new ResultSetHeaderPacket(); r.length = packet.getLength(); r.sequence = packet.getSequence(); r.fieldCount = d.readUnsignedLong(); if (d.available() > 0) r.extra = d.readUnsignedLong(); return r; } }