org.exolab.jms.message
Class MapMessageImpl

java.lang.Object
  |
  +--org.exolab.jms.message.MessageImpl
        |
        +--org.exolab.jms.message.MapMessageImpl

All Implemented Interfaces:

java.lang.Cloneable, java.io.Externalizable, javax.jms.MapMessage, javax.jms.Message, java.io.Serializable

public class MapMessageImpl

extends MessageImpl

implements javax.jms.MapMessage

This class implements the MapMessage interface.

A MapMessage is used to send a set of name-value pairs where names are Strings and values are Java primitive types. The entries can be accessed sequentially or randomly by name. The order of the entries is undefined. It inherits from Message and adds a map message body.

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 MapMessage.setInt("foo", 6) is equivalent to MapMessage.setObject("foo", new Integer(6)). 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.

When a client receives a MapMessage, it is in read-only mode. If a client attempts to write to the message at this point, a MessageNotWriteableException is thrown. If clearBody() is called, the message can now be both read from and written to.

Map messages support the following conversion table. The marked cases must be supported. The unmarked cases must throw a JMSException. The String to primitive conversions may throw a runtime exception if the primitives valueOf() method does not accept it as a valid String representation of the primitive.

A value written as the row type can be read as the column type.

 |        | 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
 |----------------------------------------------------------------------
 

Attempting to read a null value as a Java primitive type must be treated as calling the primitive's corresponding valueOf(String) conversion method with a null value. Since char does not support a String conversion, attempting to read a null value as a char must throw NullPointerException.

Version:

$Revision: 1.1 $ $Date: 2004/11/26 01:50:43 $

Author:

Jim Mourikis

See Also:

MapMessage, Serialized Form

Fields inherited from class org.exolab.jms.message.MessageImpl

_acceptedTime, _bodyReadOnly, _connectionId, _processed, _propertiesReadOnly, _sequenceNumber, EMPTY

Fields inherited from interface javax.jms.Message

DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE

Constructor Summary

MapMessageImpl()
Construct a new MapMessage

Method Summary

void	clearBody() Clear out the message body.
java.lang.Object	clone() Clone an instance of this object
boolean	getBoolean(java.lang.String name) Return the boolean value with the given name
byte	getByte(java.lang.String name) Return the byte value with the given name
byte[]	getBytes(java.lang.String name) Return the byte array value with the given name
char	getChar(java.lang.String name) Return the Unicode character value with the given name
double	getDouble(java.lang.String name) Return the double value with the given name
float	getFloat(java.lang.String name) Return the float value with the given name
int	getInt(java.lang.String name) Return the integer value with the given name
long	getLong(java.lang.String name) Return the long value with the given name
java.util.Enumeration	getMapNames() Return an Enumeration of all the Map message's names.
java.lang.Object	getObject(java.lang.String name) Return the Java object value with the given name
short	getShort(java.lang.String name) Return the short value with the given name
java.lang.String	getString(java.lang.String name) Return the String value with the given name
boolean	itemExists(java.lang.String name) Check if an item exists in this MapMessage
void	readExternal(java.io.ObjectInput in) Serialize in this message's data
void	setBoolean(java.lang.String name, boolean value) Set a boolean value with the given name, into the Map
void	setByte(java.lang.String name, byte value) Set a byte value with the given name, into the Map
void	setBytes(java.lang.String name, byte[] value) Set a byte array value with the given name, into the Map
void	setBytes(java.lang.String name, byte[] value, int offset, int length) Set a portion of the byte array value with the given name, into the Map
void	setChar(java.lang.String name, char value) Set a Unicode character value with the given name, into the Map
void	setDouble(java.lang.String name, double value) Set a double value with the given name, into the Map
void	setFloat(java.lang.String name, float value) Set a float value with the given name, into the Map
void	setInt(java.lang.String name, int value) Set an integer value with the given name, into the Map
void	setLong(java.lang.String name, long value) Set a long value with the given name, into the Map
void	setObject(java.lang.String name, java.lang.Object value) Set a Java object value with the given name, into the Map
void	setShort(java.lang.String name, short value) Set a short value with the given name, into the Map
void	setString(java.lang.String name, java.lang.String value) Set a String value with the given name, into the Map
void	writeExternal(java.io.ObjectOutput out) Serialize out this message's data

Methods inherited from class org.exolab.jms.message.MessageImpl

acknowledge, checkPropertyWrite, checkRead, checkWrite, clearProperties, getAcceptedTime, getAckMessageID, getBooleanProperty, getByteProperty, getConnectionId, getConsumerId, getDoubleProperty, getFloatProperty, getId, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getMessageId, getObjectProperty, getProcessed, getPropertyNames, getReadOnly, getSequenceNumber, getShortProperty, getStringProperty, getWildcard, propertyExists, setAcceptedTime, setBooleanProperty, setByteProperty, setConnectionId, setConsumerId, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setJMSXRcvTimestamp, setLongProperty, setObjectProperty, setProcessed, setReadOnly, setSequenceNumber, setSession, setShortProperty, setStringProperty, setWildcard

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.jms.Message

acknowledge, clearProperties, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getShortProperty, getStringProperty, propertyExists, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty

Constructor Detail

MapMessageImpl

public MapMessageImpl()
               throws javax.jms.JMSException

Construct a new MapMessage

Throws:

javax.jms.JMSException - if the message type can't be set

Method Detail

clone

public final java.lang.Object clone()
                             throws java.lang.CloneNotSupportedException

Clone an instance of this object

Overrides:

clone in class MessageImpl

Returns:

a copy of this object

Throws:

java.lang.CloneNotSupportedException - if object or attributes aren't cloneable

writeExternal

public final void writeExternal(java.io.ObjectOutput out)
                         throws java.io.IOException

Serialize out this message's data

Overrides:

writeExternal in class MessageImpl

Parameters:

out - the stream to serialize out to

Throws:

java.io.IOException - if any I/O exceptions occurr

readExternal

public final void readExternal(java.io.ObjectInput in)
                        throws java.lang.ClassNotFoundException,
                               java.io.IOException

Serialize in this message's data

Overrides:

readExternal in class MessageImpl

Parameters:

in - the stream to serialize in from

Throws:

java.lang.ClassNotFoundException - if the class for an object being restored cannot be found.

java.io.IOException - if any I/O exceptions occur

getBoolean

public final boolean getBoolean(java.lang.String name)
                         throws javax.jms.JMSException,
                                javax.jms.MessageFormatException

Return the boolean value with the given name

Specified by:

getBoolean in interface javax.jms.MapMessage

Parameters:

name - the name of the boolean

Returns:

the boolean value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getByte

public final byte getByte(java.lang.String name)
                   throws javax.jms.JMSException,
                          javax.jms.MessageFormatException

Return the byte value with the given name

Specified by:

getByte in interface javax.jms.MapMessage

Parameters:

name - the name of the byte

Returns:

the byte value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getShort

public final short getShort(java.lang.String name)
                     throws javax.jms.JMSException,
                            javax.jms.MessageFormatException

Return the short value with the given name

Specified by:

getShort in interface javax.jms.MapMessage

Parameters:

name - the name of the short

Returns:

the short value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getChar

public final char getChar(java.lang.String name)
                   throws javax.jms.JMSException,
                          javax.jms.MessageFormatException

Return the Unicode character value with the given name

Specified by:

getChar in interface javax.jms.MapMessage

Parameters:

name - the name of the Unicode character

Returns:

the Unicode character value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getInt

public final int getInt(java.lang.String name)
                 throws javax.jms.JMSException,
                        javax.jms.MessageFormatException

Return the integer value with the given name

Specified by:

getInt in interface javax.jms.MapMessage

Parameters:

name - the name of the integer

Returns:

the integer value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getLong

public final long getLong(java.lang.String name)
                   throws javax.jms.JMSException,
                          javax.jms.MessageFormatException

Return the long value with the given name

Specified by:

getLong in interface javax.jms.MapMessage

Parameters:

name - the name of the long

Returns:

the long value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getFloat

public final float getFloat(java.lang.String name)
                     throws javax.jms.JMSException,
                            javax.jms.MessageFormatException

Return the float value with the given name

Specified by:

getFloat in interface javax.jms.MapMessage

Parameters:

name - the name of the float

Returns:

the float value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getDouble

public final double getDouble(java.lang.String name)
                       throws javax.jms.JMSException,
                              javax.jms.MessageFormatException

Return the double value with the given name

Specified by:

getDouble in interface javax.jms.MapMessage

Parameters:

name - the name of the double

Returns:

the double value with the given name

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getString

public final java.lang.String getString(java.lang.String name)
                                 throws javax.jms.JMSException,
                                        javax.jms.MessageFormatException

Return the String value with the given name

Specified by:

getString in interface javax.jms.MapMessage

Parameters:

name - the name of the String

Returns:

the String value with the given name. If there is no item by this name, a null value is returned.

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getBytes

public final byte[] getBytes(java.lang.String name)
                      throws javax.jms.JMSException,
                             javax.jms.MessageFormatException

Return the byte array value with the given name

Specified by:

getBytes in interface javax.jms.MapMessage

Parameters:

name - the name of the byte array

Returns:

a copy of the byte array value with the given name. If there is no item by this name, a null value is returned.

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

javax.jms.MessageFormatException - if this type conversion is invalid

getObject

public final java.lang.Object getObject(java.lang.String name)
                                 throws javax.jms.JMSException

Return the Java object value with the given name

Note that this method can be used to return in objectified format, an object that had been stored in the Map with the equivalent setObject method call, or it's equivalent primitive set method.

Specified by:

getObject in interface javax.jms.MapMessage

Parameters:

name - the name of the Java object

Returns:

a copy of the Java object value with the given name, in objectified format (eg. if it set as an int, then an Integer is returned). Note that byte values are returned as byte[], not Byte[]. If there is no item by this name, a null value is returned.

Throws:

javax.jms.JMSException - if JMS fails to read the message due to some internal JMS error

getMapNames

public final java.util.Enumeration getMapNames()

Return an Enumeration of all the Map message's names.

Specified by:

getMapNames in interface javax.jms.MapMessage

Returns:

an enumeration of all the names in this Map message.

setBoolean

public final void setBoolean(java.lang.String name,
                             boolean value)
                      throws javax.jms.MessageNotWriteableException

Set a boolean value with the given name, into the Map

Specified by:

setBoolean in interface javax.jms.MapMessage

Parameters:

name - the name of the boolean

value - the boolean value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setByte

public final void setByte(java.lang.String name,
                          byte value)
                   throws javax.jms.MessageNotWriteableException

Set a byte value with the given name, into the Map

Specified by:

setByte in interface javax.jms.MapMessage

Parameters:

name - the name of the byte

value - the byte value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setShort

public final void setShort(java.lang.String name,
                           short value)
                    throws javax.jms.MessageNotWriteableException

Set a short value with the given name, into the Map

Specified by:

setShort in interface javax.jms.MapMessage

Parameters:

name - the name of the short

value - the short value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setChar

public final void setChar(java.lang.String name,
                          char value)
                   throws javax.jms.MessageNotWriteableException

Set a Unicode character value with the given name, into the Map

Specified by:

setChar in interface javax.jms.MapMessage

Parameters:

name - the name of the Unicode character

value - the Unicode character value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setInt

public final void setInt(java.lang.String name,
                         int value)
                  throws javax.jms.MessageNotWriteableException

Set an integer value with the given name, into the Map

Specified by:

setInt in interface javax.jms.MapMessage

Parameters:

name - the name of the integer

value - the integer value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setLong

public final void setLong(java.lang.String name,
                          long value)
                   throws javax.jms.MessageNotWriteableException

Set a long value with the given name, into the Map

Specified by:

setLong in interface javax.jms.MapMessage

Parameters:

name - the name of the long

value - the long value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setFloat

public final void setFloat(java.lang.String name,
                           float value)
                    throws javax.jms.MessageNotWriteableException

Set a float value with the given name, into the Map

Specified by:

setFloat in interface javax.jms.MapMessage

Parameters:

name - the name of the float

value - the float value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setDouble

public final void setDouble(java.lang.String name,
                            double value)
                     throws javax.jms.MessageNotWriteableException

Set a double value with the given name, into the Map

Specified by:

setDouble in interface javax.jms.MapMessage

Parameters:

name - the name of the double

value - the double value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setString

public final void setString(java.lang.String name,
                            java.lang.String value)
                     throws javax.jms.MessageNotWriteableException

Set a String value with the given name, into the Map

Specified by:

setString in interface javax.jms.MapMessage

Parameters:

name - the name of the String

value - the String value to set in the Map

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setBytes

public final void setBytes(java.lang.String name,
                           byte[] value)
                    throws javax.jms.MessageNotWriteableException

Set a byte array value with the given name, into the Map

Specified by:

setBytes in interface javax.jms.MapMessage

Parameters:

name - the name of the byte array

value - the byte array value to set in the Map. The array is copied so the value for name will not be altered by future modifications.

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setBytes

public final void setBytes(java.lang.String name,
                           byte[] value,
                           int offset,
                           int length)
                    throws javax.jms.MessageNotWriteableException

Set a portion of the byte array value with the given name, into the Map

Specified by:

setBytes in interface javax.jms.MapMessage

Parameters:

name - the name of the byte array

value - the byte array value to set in the Map.

offset - the initial offset within the byte array.

length - the number of bytes to use.

Throws:

javax.jms.MessageNotWriteableException - if the message is in read-only mode

setObject

public final void setObject(java.lang.String name,
                            java.lang.Object value)
                     throws javax.jms.MessageFormatException,
                            javax.jms.MessageNotWriteableException

Set a Java object value with the given name, into the Map

Note that this method only works for the objectified primitive object types (Integer, Double, Long ...), String's and byte arrays.

Specified by:

setObject in interface javax.jms.MapMessage

Parameters:

name - the name of the Java object

value - the Java object value to set in the Map

Throws:

javax.jms.MessageFormatException - if object is invalid

javax.jms.MessageNotWriteableException - if message in read-only mode.

itemExists

public final boolean itemExists(java.lang.String name)

Check if an item exists in this MapMessage

Specified by:

itemExists in interface javax.jms.MapMessage

Parameters:

name - the name of the item to test

Returns:

true if the item exists

clearBody

public final void clearBody()
                     throws javax.jms.JMSException

Clear out the message body. Clearing a message's body does not clear its header values or property entries. If this message body was read-only, calling this method leaves the message body is in the same state as an empty body in a newly created message

Specified by:

clearBody in interface javax.jms.Message

Overrides:

clearBody in class MessageImpl