001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.transport.util; 018 019import java.io.DataInput; 020import java.io.DataInputStream; 021import java.io.DataOutput; 022import java.io.DataOutputStream; 023import java.io.IOException; 024import java.io.Reader; 025 026import org.apache.activemq.util.ByteArrayInputStream; 027import org.apache.activemq.util.ByteArrayOutputStream; 028import org.apache.activemq.util.ByteSequence; 029import org.apache.activemq.wireformat.WireFormat; 030 031/** 032 * Adds the extra methods available to text based wire format implementations 033 * 034 * 035 */ 036public abstract class TextWireFormat implements WireFormat { 037 038 public abstract Object unmarshalText(String text) throws IOException; 039 040 public abstract Object unmarshalText(Reader reader) throws IOException; 041 042 public abstract String marshalText(Object command) throws IOException; 043 044 public void marshal(Object command, DataOutput out) throws IOException { 045 String text = marshalText(command); 046 byte[] utf8 = text.getBytes("UTF-8"); 047 out.writeInt(utf8.length); 048 out.write(utf8); 049 } 050 051 public Object unmarshal(DataInput in) throws IOException { 052 int length = in.readInt(); 053 byte[] utf8 = new byte[length]; 054 in.readFully(utf8); 055 String text = new String(utf8, "UTF-8"); 056 return unmarshalText(text); 057 } 058 059 public ByteSequence marshal(Object command) throws IOException { 060 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 061 DataOutputStream dos = new DataOutputStream(baos); 062 marshal(command, dos); 063 dos.close(); 064 return baos.toByteSequence(); 065 } 066 067 public Object unmarshal(ByteSequence packet) throws IOException { 068 ByteArrayInputStream stream = new ByteArrayInputStream(packet); 069 DataInputStream dis = new DataInputStream(stream); 070 return unmarshal(dis); 071 } 072 073 public boolean inReceive() { 074 // TODO Implement for inactivity monitor 075 return false; 076 } 077 078}