/**
* 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 io.hawtjms.jms.message;
import io.hawtjms.jms.exceptions.JmsExceptionSupport;
import java.util.ArrayList;
import java.util.List;
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.fusesource.hawtbuf.Buffer;
/**
* 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/>
* <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 |----------------------------------------------------------------------
* <p/>
* </PRE>
* <p/>
* <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 JmsStreamMessage extends JmsMessage implements StreamMessage {
private final List<Object> content = new ArrayList<Object>(20);
private Buffer bytes;
private int remainingBytes;
private int index;
private List<Object> stream;
public JmsStreamMessage(JmsMessageFacade facade) {
super(facade);
}
@Override
public JmsMessage copy() throws JMSException {
JmsStreamMessage other = new JmsStreamMessage(facade.copy());
other.copy(this);
return other;
}
private void copy(JmsStreamMessage other) throws JMSException {
super.copy(other);
this.content.clear();
this.content.addAll(other.content);
}
@Override
public void onSend() throws JMSException {
super.onSend();
reset();
}
/**
* 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.
*/
@Override
public void clearBody() throws JMSException {
super.clearBody();
content.clear();
index = 0;
bytes = null;
remainingBytes = -1;
}
/**
* 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.
*/
@Override
public boolean readBoolean() throws JMSException {
initializeReading();
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Boolean) {
return (Boolean) value;
}
if (value instanceof String) {
return Boolean.valueOf((String) value);
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to boolean.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
}
/**
* 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.
*/
@Override
public byte readByte() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Byte) {
return (Byte) value;
}
if (value instanceof String) {
return Byte.valueOf((String) value);
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to byte.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public short readShort() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Short) {
return (Short) value;
}
if (value instanceof Byte) {
return ((Byte) value).shortValue();
}
if (value instanceof String) {
return Short.valueOf((String) value);
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to short.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public char readChar() throws JMSException {
initializeReading();
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Character) {
return (Character) value;
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to char.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
}
/**
* 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.
*/
@Override
public int readInt() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Integer) {
return (Integer) value;
}
if (value instanceof Short) {
return ((Short) value).intValue();
}
if (value instanceof Byte) {
return ((Byte) value).intValue();
}
if (value instanceof String) {
return Integer.valueOf((String) value).shortValue();
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to int.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public long readLong() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Long) {
return (Long) value;
}
if (value instanceof Integer) {
return ((Integer) value).longValue();
}
if (value instanceof Short) {
return ((Short) value).longValue();
}
if (value instanceof Byte) {
return ((Byte) value).longValue();
}
if (value instanceof String) {
return Long.valueOf((String) value).shortValue();
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to long.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public float readFloat() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Float) {
return (Float) value;
}
if (value instanceof String) {
return Float.valueOf((String) value);
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to float.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public double readDouble() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value instanceof Double) {
return (Double) value;
}
if (value instanceof Float) {
return (Float) value;
}
if (value instanceof String) {
return Double.valueOf((String) value);
}
index--;
if (value == null) {
throw new NullPointerException("Cannot convert NULL value to double.");
} else {
throw new MessageFormatException("stream value is not a boolean type");
}
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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.
*/
@Override
public String readString() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value == null) {
return null;
}
if (value instanceof String) {
return (String) value;
}
if (value instanceof Double) {
return ((Double) value).toString();
}
if (value instanceof Float) {
return ((Float) value).toString();
}
if (value instanceof Long) {
return ((Long) value).toString();
}
if (value instanceof Integer) {
return ((Integer) value).toString();
}
if (value instanceof Short) {
return ((Short) value).toString();
}
if (value instanceof Byte) {
return ((Byte) value).toString();
}
if (value instanceof Character) {
return ((Character) value).toString();
}
if (value instanceof Boolean) {
return ((Boolean) value).toString();
}
index--;
throw new MessageFormatException("Cannot convert byte array to String.");
} catch (NumberFormatException nfe) {
index--;
throw nfe;
}
}
/**
* 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()
*/
@Override
public int readBytes(byte[] value) throws JMSException {
initializeReading();
try {
if (value == null) {
throw new NullPointerException();
}
checkEndOfStream();
if (remainingBytes == -1) {
Object data = stream.get(index++);
if (!(data instanceof Buffer)) {
throw new MessageFormatException("Not a byte array");
}
bytes = (Buffer) data;
remainingBytes = bytes.length();
} else if (remainingBytes == 0) {
remainingBytes = -1;
bytes = null;
return -1;
}
if (value.length <= remainingBytes) {
// small buffer
remainingBytes -= value.length;
System.arraycopy(bytes.data, bytes.offset, value, 0, value.length);
bytes.offset += value.length;
return value.length;
} else {
// big buffer
System.arraycopy(bytes.data, bytes.offset, value, 0, remainingBytes);
remainingBytes = 0;
return bytes.length();
}
} catch (Throwable e) {
throw JmsExceptionSupport.createMessageFormatException(e);
}
}
/**
* 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)
*/
@Override
public Object readObject() throws JMSException {
initializeReading();
try {
checkEndOfStream();
Object value = stream.get(index++);
if (value == null) {
return null;
}
if (value instanceof String) {
return value;
}
if (value instanceof Double) {
return value;
}
if (value instanceof Float) {
return value;
}
if (value instanceof Long) {
return value;
}
if (value instanceof Integer) {
return value;
}
if (value instanceof Short) {
return value;
}
if (value instanceof Byte) {
return value;
}
if (value instanceof Character) {
return value;
}
if (value instanceof Boolean) {
return value;
}
if (value instanceof Buffer) {
return ((Buffer) value).toByteArray();
} else {
index--;
throw new MessageFormatException("Unknown type found in stream");
}
} catch (Exception ex) {
index--;
throw JmsExceptionSupport.create(ex);
}
}
/**
* 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.
*/
@Override
public void writeBoolean(boolean value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeByte(byte value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeShort(short value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeChar(char value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeInt(int value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeLong(long value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeFloat(float value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeDouble(double value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
public void writeString(String value) throws JMSException {
initializeWriting();
stream.add(value);
}
/**
* 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.
*/
@Override
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.
*/
@Override
public void writeBytes(byte[] value, int offset, int length) throws JMSException {
initializeWriting();
Buffer temp = new Buffer(value, offset, length);
stream.add(temp.deepCopy());
}
/**
* 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.
*/
@Override
public void writeObject(Object value) throws JMSException {
initializeWriting();
if (value == null) {
stream.add(null);
} 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);
} else if (value instanceof Long) {
writeLong(((Long) value).longValue());
} else {
throw new MessageFormatException("Unsupported Object type: " + value.getClass());
}
}
/**
* Puts the message body in read-only mode and repositions the stream of
* bytes to the beginning.
*
* @throws JMSException
* if an internal error occurs
*/
@Override
public void reset() throws JMSException {
stream = null;
index = 0;
bytes = null;
remainingBytes = -1;
setReadOnlyBody(true);
}
private void initializeWriting() throws MessageNotWriteableException {
checkReadOnlyBody();
if (stream == null) {
content.clear();
stream = content;
}
}
protected void checkWriteOnlyBody() throws MessageNotReadableException {
if (!readOnlyBody) {
throw new MessageNotReadableException("Message body is write-only");
}
}
private void initializeReading() throws MessageNotReadableException {
checkWriteOnlyBody();
if (stream == null) {
stream = content;
index = 0;
bytes = null;
remainingBytes = -1;
}
}
private void checkEndOfStream() throws MessageEOFException {
if (stream.isEmpty() || index >= stream.size()) {
throw new MessageEOFException("Cannot read beyond end of stream");
}
}
@Override
public String toString() {
return super.toString() + " JmsStreamMessage{ " + content + " }";
}
}