/**
*
* Copyright 2004 Protique Ltd
*
* 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.activemq.message;
import javax.jms.JMSException;
import javax.jms.MessageEOFException;
import javax.jms.MessageFormatException;
import javax.jms.MessageNotReadableException;
import javax.jms.MessageNotWriteableException;
import javax.jms.StreamMessage;
import org.activemq.io.util.ByteArray;
import org.activemq.io.util.ByteArrayCompression;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
/**
* A <CODE>StreamMessage</CODE> object is used to send a stream of primitive
* types in the Java programming language. It is filled and read sequentially.
* It inherits from the <CODE>Message</CODE> interface
* and adds a stream message body. Its methods are based largely on those
* found in <CODE>java.io.DataInputStream</CODE> and
* <CODE>java.io.DataOutputStream</CODE>.
* <p/>
* <P>The primitive types can be read or written explicitly using methods
* for each type. They may also be read or written generically as objects.
* For instance, a call to <CODE>StreamMessage.writeInt(6)</CODE> is
* equivalent to <CODE>StreamMessage.writeObject(new Integer(6))</CODE>.
* Both forms are provided, because the explicit form is convenient for
* static programming, and the object form is needed when types are not known
* at compile time.
* <p/>
* <P>When the message is first created, and when <CODE>clearBody</CODE>
* is called, the body of the message is in write-only mode. After the
* first call to <CODE>reset</CODE> has been made, the message body is in
* read-only mode.
* After a message has been sent, the client that sent it can retain and
* modify it without affecting the message that has been sent. The same message
* object can be sent multiple times.
* When a message has been received, the provider has called
* <CODE>reset</CODE> so that the message body is in read-only mode for the client.
* <p/>
* <P>If <CODE>clearBody</CODE> is called on a message in read-only mode,
* the message body is cleared and the message body is in write-only mode.
* <p/>
* <P>If a client attempts to read a message in write-only mode, a
* <CODE>MessageNotReadableException</CODE> is thrown.
* <p/>
* <P>If a client attempts to write a message in read-only mode, a
* <CODE>MessageNotWriteableException</CODE> is thrown.
* <p/>
* <P><CODE>StreamMessage</CODE> objects support the following conversion
* table. The marked cases must be supported. The unmarked cases must throw a
* <CODE>JMSException</CODE>. The <CODE>String</CODE>-to-primitive conversions
* may throw a runtime exception if the primitive's <CODE>valueOf()</CODE>
* method does not accept it as a valid <CODE>String</CODE> representation of
* the primitive.
* <p/>
* <P>A value written as the row type can be read as the column type.
* <p/>
* <PRE>
* | | boolean byte short char int long float double String byte[]
* |----------------------------------------------------------------------
* |boolean | X X
* |byte | X X X X X
* |short | X X X X
* |char | X X
* |int | X X X
* |long | X X
* |float | X X X
* |double | X X
* |String | X X X X X X X X
* |byte[] | X
* |----------------------------------------------------------------------
* </PRE>
* <p/>
* <P>Attempting to read a null value as a primitive type must be treated
* as calling the primitive's corresponding <code>valueOf(String)</code>
* conversion method with a null value. Since <code>char</code> does not
* support a <code>String</code> conversion, attempting to read a null value
* as a <code>char</code> must throw a <code>NullPointerException</code>.
*
* @see javax.jms.Session#createStreamMessage()
* @see javax.jms.BytesMessage
* @see javax.jms.MapMessage
* @see javax.jms.Message
* @see javax.jms.ObjectMessage
* @see javax.jms.TextMessage
*/
public class ActiveMQStreamMessage extends ActiveMQMessage implements StreamMessage {
private DataOutputStream dataOut;
private ByteArrayOutputStream bytesOut;
private DataInputStream dataIn;
private int bytesToRead = -1;
/**
* Return the type of Packet
*
* @return integer representation of the type of Packet
*/
public int getPacketType() {
return ACTIVEMQ_STREAM_MESSAGE;
}
/**
* @return Returns a shallow copy of the message instance
* @throws JMSException
*/
public ActiveMQMessage shallowCopy() throws JMSException {
ActiveMQStreamMessage other = new ActiveMQStreamMessage();
this.initializeOther(other);
try {
other.setBodyAsBytes(this.getBodyAsBytes());
}
catch (IOException e) {
JMSException jmsEx = new JMSException("setBodyAsBytes() failed");
jmsEx.setLinkedException(e);
throw jmsEx;
}
return other;
}
/**
* @return Returns a deep copy of the message - note the header fields are only shallow copied
* @throws JMSException
*/
public ActiveMQMessage deepCopy() throws JMSException {
ActiveMQStreamMessage other = new ActiveMQStreamMessage();
this.initializeOther(other);
try {
if (this.getBodyAsBytes() != null) {
ByteArray data = this.getBodyAsBytes().copy();
other.setBodyAsBytes(data);
}
}
catch (IOException e) {
JMSException jmsEx = new JMSException("setBodyAsBytes() failed");
jmsEx.setLinkedException(e);
throw jmsEx;
}
return other;
}
/**
* Clears out the message body. Clearing a message's body does not clear
* its header values or property entries.
* <p/>
* <P>If this message body was read-only, calling this method leaves
* the message body in the same state as an empty body in a newly
* created message.
*
* @throws JMSException if the JMS provider fails to clear the message
* body due to some internal error.
*/
public void clearBody() throws JMSException {
super.clearBody();
this.dataOut = null;
this.dataIn = null;
this.bytesOut = null;
}
/**
* Reads a <code>boolean</code> from the stream message.
*
* @return the <code>boolean</code> value read
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public boolean readBoolean() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(10);
int type = this.dataIn.read();
if (type == BOOLEAN) {
return this.dataIn.readBoolean();
}
if (type == STRING) {
return Boolean.valueOf(this.dataIn.readUTF()).booleanValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to boolean.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a boolean type");
}
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a <code>byte</code> value from the stream message.
*
* @return the next byte from the stream message as a 8-bit
* <code>byte</code>
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public byte readByte() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(10);
int type = this.dataIn.read();
if (type == BYTE) {
return this.dataIn.readByte();
}
if (type == STRING) {
return Byte.valueOf(this.dataIn.readUTF()).byteValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to byte.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a byte type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a 16-bit integer from the stream message.
*
* @return a 16-bit integer from the stream message
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public short readShort() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(17);
int type = this.dataIn.read();
if (type == SHORT) {
return this.dataIn.readShort();
}
if (type == BYTE) {
return this.dataIn.readByte();
}
if (type == STRING) {
return Short.valueOf(this.dataIn.readUTF()).shortValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to short.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a short type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a Unicode character value from the stream message.
*
* @return a Unicode character from the stream message
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public char readChar() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(17);
int type = this.dataIn.read();
if (type == CHAR) {
return this.dataIn.readChar();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to char.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a char type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a 32-bit integer from the stream message.
*
* @return a 32-bit integer value from the stream message, interpreted
* as an <code>int</code>
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public int readInt() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(33);
int type = this.dataIn.read();
if (type == INT) {
return this.dataIn.readInt();
}
if (type == SHORT) {
return this.dataIn.readShort();
}
if (type == BYTE) {
return this.dataIn.readByte();
}
if (type == STRING) {
return Integer.valueOf(this.dataIn.readUTF()).intValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to int.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not an int type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a 64-bit integer from the stream message.
*
* @return a 64-bit integer value from the stream message, interpreted as
* a <code>long</code>
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public long readLong() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == LONG) {
return this.dataIn.readLong();
}
if (type == INT) {
return this.dataIn.readInt();
}
if (type == SHORT) {
return this.dataIn.readShort();
}
if (type == BYTE) {
return this.dataIn.readByte();
}
if (type == STRING) {
return Long.valueOf(this.dataIn.readUTF()).longValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to long.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a long type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a <code>float</code> from the stream message.
*
* @return a <code>float</code> value from the stream message
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public float readFloat() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(33);
int type = this.dataIn.read();
if (type == FLOAT) {
return this.dataIn.readFloat();
}
if (type == STRING) {
return Float.valueOf(this.dataIn.readUTF()).floatValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to float.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a float type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a <code>double</code> from the stream message.
*
* @return a <code>double</code> value from the stream message
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public double readDouble() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == DOUBLE) {
return this.dataIn.readDouble();
}
if (type == FLOAT) {
return this.dataIn.readFloat();
}
if (type == STRING) {
return Double.valueOf(this.dataIn.readUTF()).doubleValue();
}
if (type == NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to double.");
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a double type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a <CODE>String</CODE> from the stream message.
*
* @return a Unicode string from the stream message
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
*/
public String readString() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == NULL) {
return null;
}
if (type == STRING) {
return this.dataIn.readUTF();
}
if (type == LONG) {
return new Long(this.dataIn.readLong()).toString();
}
if (type == INT) {
return new Integer(this.dataIn.readInt()).toString();
}
if (type == SHORT) {
return new Short(this.dataIn.readShort()).toString();
}
if (type == BYTE) {
return new Byte(this.dataIn.readByte()).toString();
}
if (type == FLOAT) {
return new Float(this.dataIn.readFloat()).toString();
}
if (type == DOUBLE) {
return new Double(this.dataIn.readDouble()).toString();
}
if (type == BOOLEAN) {
return (this.dataIn.readBoolean() ? Boolean.TRUE : Boolean.FALSE).toString();
}
if (type == CHAR) {
return new Character(this.dataIn.readChar()).toString();
}
else {
this.dataIn.reset();
throw new MessageFormatException(" not a String type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads a byte array field from the stream message into the
* specified <CODE>byte[]</CODE> object (the read buffer).
* <p/>
* <P>To read the field value, <CODE>readBytes</CODE> should be
* successively called
* until it returns a value less than the length of the read buffer.
* The value of the bytes in the buffer following the last byte
* read is undefined.
* <p/>
* <P>If <CODE>readBytes</CODE> returns a value equal to the length of the
* buffer, a subsequent <CODE>readBytes</CODE> call must be made. If there
* are no more bytes to be read, this call returns -1.
* <p/>
* <P>If the byte array field value is null, <CODE>readBytes</CODE>
* returns -1.
* <p/>
* <P>If the byte array field value is empty, <CODE>readBytes</CODE>
* returns 0.
* <p/>
* <P>Once the first <CODE>readBytes</CODE> call on a <CODE>byte[]</CODE>
* field value has been made,
* the full value of the field must be read before it is valid to read
* the next field. An attempt to read the next field before that has
* been done will throw a <CODE>MessageFormatException</CODE>.
* <p/>
* <P>To read the byte field value into a new <CODE>byte[]</CODE> object,
* use the <CODE>readObject</CODE> method.
*
* @param value the buffer into which the data is read
* @return the total number of bytes read into the buffer, or -1 if
* there is no more data because the end of the byte field has been
* reached
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
* @see #readObject()
*/
public int readBytes(byte[] value) throws JMSException {
initializeReading();
try {
if (value == null) {
throw new NullPointerException();
}
if (bytesToRead == 0) {
bytesToRead = -1;
return -1;
}
else if (bytesToRead > 0) {
if (value.length >= bytesToRead) {
bytesToRead = 0;
return dataIn.read(value, 0, bytesToRead);
}
else {
bytesToRead -= value.length;
return dataIn.read(value);
}
}
else {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
if (this.dataIn.available() < 1) {
throw new MessageFormatException("Not enough data left to read value");
}
this.dataIn.mark(value.length + 1);
int type = this.dataIn.read();
if (this.dataIn.available() < 1) {
return -1;
}
if (type != BYTES) {
throw new MessageFormatException("Not a byte array");
}
int len = this.dataIn.readInt();
if (len >= value.length) {
bytesToRead = len - value.length;
return this.dataIn.read(value);
}
else {
bytesToRead = 0;
return this.dataIn.read(value, 0, len);
}
}
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Reads an object from the stream message.
* <p/>
* <P>This method can be used to return, in objectified format,
* an object in the Java programming language ("Java object") that has
* been written to the stream with the equivalent
* <CODE>writeObject</CODE> method call, or its equivalent primitive
* <CODE>write<I>type</I></CODE> method.
* <p/>
* <P>Note that byte values are returned as <CODE>byte[]</CODE>, not
* <CODE>Byte[]</CODE>.
* <p/>
* <P>An attempt to call <CODE>readObject</CODE> to read a byte field
* value into a new <CODE>byte[]</CODE> object before the full value of the
* byte field has been read will throw a
* <CODE>MessageFormatException</CODE>.
*
* @return a Java object from the stream message, in objectified
* format (for example, if the object was written as an <CODE>int</CODE>,
* an <CODE>Integer</CODE> is returned)
* @throws JMSException if the JMS provider fails to read the message
* due to some internal error.
* @throws MessageEOFException if unexpected end of message stream has
* been reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only
* mode.
* @see #readBytes(byte[] value)
*/
public Object readObject() throws JMSException {
initializeReading();
try {
if (this.dataIn.available() == 0) {
throw new MessageEOFException("reached end of data");
}
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == NULL) {
return null;
}
if (type == STRING) {
return this.dataIn.readUTF();
}
if (type == LONG) {
return new Long(this.dataIn.readLong());
}
if (type == INT) {
return new Integer(this.dataIn.readInt());
}
if (type == SHORT) {
return new Short(this.dataIn.readShort());
}
if (type == BYTE) {
return new Byte(this.dataIn.readByte());
}
if (type == FLOAT) {
return new Float(this.dataIn.readFloat());
}
if (type == DOUBLE) {
return new Double(this.dataIn.readDouble());
}
if (type == BOOLEAN) {
return this.dataIn.readBoolean() ? Boolean.TRUE : Boolean.FALSE;
}
if (type == CHAR) {
return new Character(this.dataIn.readChar());
}
if (type == BYTES) {
int len = this.dataIn.readInt();
byte[] value = new byte[len];
this.dataIn.read(value);
return value;
}
else {
this.dataIn.reset();
throw new MessageFormatException("unknown type");
}
}
catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed");
jmsEx.setLinkedException(ioe);
}
throw mfe;
}
catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* Writes a <code>boolean</code> to the stream message.
* The value <code>true</code> is written as the value
* <code>(byte)1</code>; the value <code>false</code> is written as
* the value <code>(byte)0</code>.
*
* @param value the <code>boolean</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeBoolean(boolean value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(BOOLEAN);
this.dataOut.writeBoolean(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>byte</code> to the stream message.
*
* @param value the <code>byte</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeByte(byte value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(BYTE);
this.dataOut.writeByte(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>short</code> to the stream message.
*
* @param value the <code>short</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeShort(short value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(SHORT);
this.dataOut.writeShort(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>char</code> to the stream message.
*
* @param value the <code>char</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeChar(char value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(CHAR);
this.dataOut.writeChar(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes an <code>int</code> to the stream message.
*
* @param value the <code>int</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeInt(int value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(INT);
this.dataOut.writeInt(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>long</code> to the stream message.
*
* @param value the <code>long</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeLong(long value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(LONG);
this.dataOut.writeLong(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>float</code> to the stream message.
*
* @param value the <code>float</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeFloat(float value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(FLOAT);
this.dataOut.writeFloat(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>double</code> to the stream message.
*
* @param value the <code>double</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeDouble(double value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(DOUBLE);
this.dataOut.writeDouble(value);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a <code>String</code> to the stream message.
*
* @param value the <code>String</code> value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeString(String value) throws JMSException {
initializeWriting();
try {
if (value == null) {
this.dataOut.write(NULL);
}
else {
this.dataOut.write(STRING);
this.dataOut.writeUTF(value);
}
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes a byte array field to the stream message.
* <p/>
* <P>The byte array <code>value</code> is written to the message
* as a byte array field. Consecutively written byte array fields are
* treated as two distinct fields when the fields are read.
*
* @param value the byte array value to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeBytes(byte[] value) throws JMSException {
writeBytes(value, 0, value.length);
}
/**
* Writes a portion of a byte array as a byte array field to the stream
* message.
* <p/>
* <P>The a portion of the byte array <code>value</code> is written to the
* message as a byte array field. Consecutively written byte
* array fields are treated as two distinct fields when the fields are
* read.
*
* @param value the byte array value to be written
* @param offset the initial offset within the byte array
* @param length the number of bytes to use
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeBytes(byte[] value, int offset, int length) throws JMSException {
initializeWriting();
try {
this.dataOut.write(BYTES);
this.dataOut.writeInt(length);
this.dataOut.write(value, offset, length);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
/**
* Writes an object to the stream message.
* <p/>
* <P>This method works only for the objectified primitive
* object types (<code>Integer</code>, <code>Double</code>,
* <code>Long</code> ...), <code>String</code> objects, and byte
* arrays.
*
* @param value the Java object to be written
* @throws JMSException if the JMS provider fails to write the message
* due to some internal error.
* @throws MessageFormatException if the object is invalid.
* @throws MessageNotWriteableException if the message is in read-only
* mode.
*/
public void writeObject(Object value) throws JMSException {
initializeWriting();
if (value == null) {
try {
this.dataOut.write(NULL);
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException(ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
else if (value instanceof String) {
writeString(value.toString());
}
else if (value instanceof Character) {
writeChar(((Character) value).charValue());
}
else if (value instanceof Boolean) {
writeBoolean(((Boolean) value).booleanValue());
}
else if (value instanceof Byte) {
writeByte(((Byte) value).byteValue());
}
else if (value instanceof Short) {
writeShort(((Short) value).shortValue());
}
else if (value instanceof Integer) {
writeInt(((Integer) value).intValue());
}
else if (value instanceof Float) {
writeFloat(((Float) value).floatValue());
}
else if (value instanceof Double) {
writeDouble(((Double) value).doubleValue());
}
else if (value instanceof byte[]) {
writeBytes((byte[]) value);
}
}
/**
* Puts the message body in read-only mode and repositions the stream of
* bytes to the beginning.
*
* @throws JMSException if an internal error occurs
*/
public void reset() throws JMSException {
super.readOnlyMessage = true;
if (this.dataOut != null) {
try {
this.dataOut.flush();
byte[] data = this.bytesOut.toByteArray();
super.setBodyAsBytes(data,0,data.length);
dataOut.close();
}
catch (IOException ioe) {
JMSException jmsEx = new JMSException("reset failed: " + ioe.getMessage());
jmsEx.setLinkedException(ioe);
throw jmsEx;
}
}
this.bytesOut = null;
this.dataIn = null;
this.dataOut = null;
}
/**
* @param bodyAsBytes The bodyAsBytes to set.
* @param offset
* @param length
*/
public void setBodyAsBytes(byte[] bodyAsBytes,int offset, int length) {
super.setBodyAsBytes(bodyAsBytes,offset,length);
dataOut = null;
dataIn = null;
}
/**
* @return Returns the data body
* @throws IOException if an exception occurs retreiving the data
*/
public ByteArray getBodyAsBytes() throws IOException {
if (this.dataOut != null) {
this.dataOut.flush();
byte[] data = this.bytesOut.toByteArray();
super.setBodyAsBytes(data,0,data.length);
dataOut.close();
dataOut = null;
}
return super.getBodyAsBytes();
}
private void initializeWriting() throws MessageNotWriteableException {
if (super.readOnlyMessage) {
throw new MessageNotWriteableException("This message is in read-only mode");
}
if (this.dataOut == null) {
this.bytesOut = new ByteArrayOutputStream();
this.dataOut = new DataOutputStream(this.bytesOut);
}
}
private void initializeReading() throws MessageNotReadableException {
if (!super.readOnlyMessage) {
throw new MessageNotReadableException("This message is in write-only mode");
}
try {
ByteArray data = super.getBodyAsBytes();
if (this.dataIn == null && data != null) {
if (ByteArrayCompression.isCompressed(data)){
ByteArrayCompression compression = new ByteArrayCompression();
data = compression.inflate(data);
}
ByteArrayInputStream bytesIn = new ByteArrayInputStream(data.getBuf(),data.getOffset(),data.getLength());
this.dataIn = new DataInputStream(bytesIn);
}
}
catch (IOException e) {
MessageNotReadableException mnr = new MessageNotReadableException("getBodyAsBytes failed");
mnr.setLinkedException(e);
throw mnr;
}
}
public String toString() {
return super.toString() + " ActiveMQStreamMessage{ " +
"bytesOut = " + bytesOut +
", dataOut = " + dataOut +
", dataIn = " + dataIn +
", bytesToRead = " + bytesToRead +
" }";
}
}