/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jms.message;
import javax.jms.JMSException;
import javax.jms.MessageEOFException;
import javax.jms.StreamMessage;
import java.util.ArrayList;
import java.io.*;
import com.caucho.vfs.*;
import com.caucho.hessian.io.*;
/**
* A stream message.
*/
public class StreamMessageImpl extends MessageImpl implements StreamMessage
{
private ArrayList<Object> _values = new ArrayList<Object>();
private int _index;
private byte []_bytes;
private int _bytesOffset;
public StreamMessageImpl()
{
}
StreamMessageImpl(StreamMessage stream)
throws JMSException
{
super(stream);
try {
stream.reset();
Object value;
while (true) {
writeObject(stream.readObject());
}
} catch (MessageEOFException e) {
}
reset();
}
StreamMessageImpl(StreamMessageImpl stream)
{
super(stream);
_values.addAll(stream._values);
try {
reset();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Returns the type enumeration.
*/
@Override
public MessageType getType()
{
return MessageType.STREAM;
}
/**
* Sets the body for reading.
*/
public void setReceive()
throws JMSException
{
super.setReceive();
reset();
}
/**
* Set the stream for reading.
*/
public void reset()
throws JMSException
{
setBodyReadOnly();
_index = 0;
_bytes = null;
_bytesOffset = 0;
}
/**
* Read a boolean from the stream.
*/
public boolean readBoolean()
throws JMSException
{
boolean value = ObjectConverter.toBoolean(readObjectImpl());
_index++;
return value;
}
/**
* Read a byte from the stream.
*/
public byte readByte()
throws JMSException
{
byte value = ObjectConverter.toByte(readObjectImpl());
_index++;
return value;
}
/**
* Read a short from the stream.
*/
public short readShort()
throws JMSException
{
short value = ObjectConverter.toShort(readObjectImpl());
_index++;
return value;
}
/**
* Read an integer from the stream.
*/
public int readInt()
throws JMSException
{
int value = ObjectConverter.toInt(readObjectImpl());
_index++;
return value;
}
/**
* Read a long from the stream.
*/
public long readLong()
throws JMSException
{
long value = ObjectConverter.toLong(readObjectImpl());
_index++;
return value;
}
/**
* Read a float from the stream.
*/
public float readFloat()
throws JMSException
{
float value = ObjectConverter.toFloat(readObjectImpl());
_index++;
return value;
}
/**
* Read a double from the stream.
*/
public double readDouble()
throws JMSException
{
double value = ObjectConverter.toDouble(readObjectImpl());
_index++;
return value;
}
/**
* Read a character object from the stream.
*/
public char readChar()
throws JMSException
{
char value = ObjectConverter.toChar(readObjectImpl());
_index++;
return value;
}
/**
* Read a string from the stream.
*/
public String readString()
throws JMSException
{
String value = ObjectConverter.toString(readObjectImpl());
_index++;
return value;
}
/**
* Read a byte array object from the stream.
*/
public int readBytes(byte []value)
throws JMSException
{
byte []bytes;
if (_bytes != null) {
if (_bytesOffset == _bytes.length) {
_bytes = null;
_bytesOffset = 0;
return -1;
}
}
else {
_bytes = ObjectConverter.toBytes(readObjectImpl());
_index++;
}
if (_bytes == null)
return -1;
int sublen = _bytes.length - _bytesOffset;
if (value.length < sublen)
sublen = value.length;
for (int i = 0; i < sublen; i++)
value[i] = _bytes[_bytesOffset++];
return sublen;
}
/**
* Reads the next object.
*/
public Object readObject()
throws JMSException
{
Object value = readObjectImpl();
_index++;
return value;
}
/**
* Reads the next object.
*/
private Object readObjectImpl()
throws JMSException
{
checkBodyReadable();
if (_values.size() <= _index)
throw new MessageEOFException(L.l("end of message in stream"));
_bytes = null;
_bytesOffset = 0;
return _values.get(_index);
}
/**
* Clears the message and puts it into write mode.
*/
public void clearBody()
throws JMSException
{
super.clearBody();
_values.clear();
_index = 0;
_bytes = null;
_bytesOffset = 0;
}
/**
* Writes a boolean to the stream.
*/
public void writeBoolean(boolean b)
throws JMSException
{
writeObject(new Boolean(b));
}
/**
* Writes a byte to the stream.
*/
public void writeByte(byte b)
throws JMSException
{
writeObject(new Byte(b));
}
/**
* Writes a short to the stream.
*/
public void writeShort(short s)
throws JMSException
{
writeObject(new Short(s));
}
/**
* Writes an integer to the stream.
*/
public void writeInt(int i)
throws JMSException
{
writeObject(new Integer(i));
}
/**
* Writes a long to the stream.
*/
public void writeLong(long l)
throws JMSException
{
writeObject(new Long(l));
}
/**
* Writes a float to the stream.
*/
public void writeFloat(float f)
throws JMSException
{
writeObject(new Float(f));
}
/**
* Writes a double to the stream.
*/
public void writeDouble(double d)
throws JMSException
{
writeObject(new Double(d));
}
/**
* Writes a string to the stream.
*/
public void writeString(String s)
throws JMSException
{
writeObject(s);
}
/**
* Writes a character to the stream.
*/
public void writeChar(char ch)
throws JMSException
{
writeObject(new Character(ch));
}
/**
* Writes a byte array to the stream.
*/
public void writeBytes(byte []buf)
throws JMSException
{
writeBytes(buf, 0, buf.length);
}
/**
* Writes a byte array to the stream.
*/
public void writeBytes(byte []buf, int offset, int length)
throws JMSException
{
byte []newBuf = new byte[length];
System.arraycopy(buf, offset, newBuf, 0, length);
writeObject(newBuf);
}
/**
* Writes the next object.
*/
public void writeObject(Object obj)
throws JMSException
{
checkBodyWriteable();
_values.add(obj);
}
@Override
public MessageImpl copy()
{
return new StreamMessageImpl(this);
}
protected void copy(StreamMessageImpl newMsg)
{
super.copy(newMsg);
newMsg._values = new ArrayList(_values);
newMsg._index = 0;
}
/**
* Serialize the body to an input stream.
*/
@Override
public InputStream bodyToInputStream()
throws IOException
{
if (_values == null || _values.size() == 0)
return null;
TempStream body = new TempStream();
body.openWrite();
StreamImplOutputStream ws = new StreamImplOutputStream(body);
Hessian2Output out = new Hessian2Output(ws);
out.writeObject(_values);
out.close();
ws.close();
return body.openRead();
}
/**
* Read the body from an input stream.
*/
@Override
public void readBody(InputStream is)
throws IOException, JMSException
{
if (is != null) {
Hessian2Input in = new Hessian2Input(is);
_values = (ArrayList<Object>) in.readObject();
in.close();
}
reset();
}
public String toString()
{
return "StreamMessageImpl[]";
}
}