All Superinterfaces:: Message

public interface MapMessage extends Message

A MapMessage object is used to send a set of name-value pairs. The names are String objects, and the values are primitive data types in the Java programming language. The names must have a value that is not null, and not an empty string. The entries can be accessed sequentially or randomly by name. The order of the entries is undefined. MapMessage inherits from the Message interface and adds a message body that contains a Map.

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.

MapMessage objects 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 primitive's 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 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 a NullPointerException.

Since:

JMS 1.0

See Also:

Field Summary

Fields inherited from interface javax.jms.Message
DEFAULT_DELIVERY_DELAY, DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE
Method Summary

Modifier and Type

Method

Description

boolean

getBoolean(String name)

Returns the boolean value with the specified name.

byte

getByte(String name)

Returns the byte value with the specified name.

byte[]

getBytes(String name)

Returns the byte array value with the specified name.

char

getChar(String name)

Returns the Unicode character value with the specified name.

double

getDouble(String name)

Returns the double value with the specified name.

float

getFloat(String name)

Returns the float value with the specified name.

int

getInt(String name)

Returns the int value with the specified name.

long

getLong(String name)

Returns the long value with the specified name.

Enumeration

getMapNames()

Returns an Enumeration of all the names in the MapMessage object.

Object

getObject(String name)

Returns the value of the object with the specified name.

short

getShort(String name)

Returns the short value with the specified name.

String

getString(String name)

Returns the String value with the specified name.

boolean

itemExists(String name)

Indicates whether an item exists in this MapMessage object.

void

setBoolean(String name, boolean value)

Sets a boolean value with the specified name into the Map.

void

setByte(String name, byte value)

Sets a byte value with the specified name into the Map.

void

setBytes(String name, byte[] value)

Sets a byte array value with the specified name into the Map.

void

setBytes(String name, byte[] value, int offset, int length)

Sets a portion of the byte array value with the specified name into the Map.

void

setChar(String name, char value)

Sets a Unicode character value with the specified name into the Map.

void

setDouble(String name, double value)

Sets a double value with the specified name into the Map.

void

setFloat(String name, float value)

Sets a float value with the specified name into the Map.

void

setInt(String name, int value)

Sets an int value with the specified name into the Map.

void

setLong(String name, long value)

Sets a long value with the specified name into the Map.

void

setObject(String name, Object value)

Sets an object value with the specified name into the Map.

void

setShort(String name, short value)

Sets a short value with the specified name into the Map.

void

setString(String name, String value)

Sets a String value with the specified name into the Map.

Methods inherited from interface javax.jms.Message
acknowledge, clearBody, clearProperties, getBody, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDeliveryTime, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getShortProperty, getStringProperty, isBodyAssignableTo, propertyExists, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDeliveryTime, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty

Method Details
- getBoolean
  
  boolean getBoolean(String name) throws JMSException
  
  Returns the boolean value with the specified name.
  
  Parameters:
  
  name - the name of the boolean
  
  Returns:
  
  the boolean value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getByte
  
  byte getByte(String name) throws JMSException
  
  Returns the byte value with the specified name.
  
  Parameters:
  
  name - the name of the byte
  
  Returns:
  
  the byte value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getShort
  
  short getShort(String name) throws JMSException
  
  Returns the short value with the specified name.
  
  Parameters:
  
  name - the name of the short
  
  Returns:
  
  the short value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getChar
  
  char getChar(String name) throws JMSException
  
  Returns the Unicode character value with the specified name.
  
  Parameters:
  
  name - the name of the Unicode character
  
  Returns:
  
  the Unicode character value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getInt
  
  int getInt(String name) throws JMSException
  
  Returns the int value with the specified name.
  
  Parameters:
  
  name - the name of the int
  
  Returns:
  
  the int value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getLong
  
  long getLong(String name) throws JMSException
  
  Returns the long value with the specified name.
  
  Parameters:
  
  name - the name of the long
  
  Returns:
  
  the long value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getFloat
  
  float getFloat(String name) throws JMSException
  
  Returns the float value with the specified name.
  
  Parameters:
  
  name - the name of the float
  
  Returns:
  
  the float value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getDouble
  
  double getDouble(String name) throws JMSException
  
  Returns the double value with the specified name.
  
  Parameters:
  
  name - the name of the double
  
  Returns:
  
  the double value with the specified name
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getString
  
  String getString(String name) throws JMSException
  
  Returns the String value with the specified name.
  
  Parameters:
  
  name - the name of the String
  
  Returns:
  
  the String value with the specified name; if there is no item by this name, a null value is returned
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getBytes
  
  byte[] getBytes(String name) throws JMSException
  
  Returns the byte array value with the specified name.
  
  Parameters:
  
  name - the name of the byte array
  
  Returns:
  
  a copy of the byte array value with the specified name; if there is no item by this name, a null value is returned.
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
  
  MessageFormatException - if this type conversion is invalid.
- getObject
  
  Object getObject(String name) throws JMSException
  
  Returns the value of the object with the specified name.
  This method can be used to return, in objectified format, an object in the Java programming language ("Java object") that had been stored in the Map with the equivalent setObject method call, or its equivalent primitive set<I>type</I> method.
  Note that byte values are returned as byte[], not Byte[].
  
  Parameters:
  
  name - the name of the Java object
  
  Returns:
  
  a copy of the Java object value with the specified name, in objectified format (for example, if the object was set as an int, an Integer is returned); if there is no item by this name, a null value is returned
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
- getMapNames
  
  Enumeration getMapNames() throws JMSException
  
  Returns an Enumeration of all the names in the MapMessage object.
  
  Returns:
  
  an enumeration of all the names in this MapMessage
  
  Throws:
  
  JMSException - if the JMS provider fails to read the message due to some internal error.
- setBoolean
  
  void setBoolean(String name, boolean value) throws JMSException
  
  Sets a boolean value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the boolean
  
  value - the boolean value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setByte
  
  void setByte(String name, byte value) throws JMSException
  
  Sets a byte value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the byte
  
  value - the byte value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setShort
  
  void setShort(String name, short value) throws JMSException
  
  Sets a short value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the short
  
  value - the short value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setChar
  
  void setChar(String name, char value) throws JMSException
  
  Sets a Unicode character value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the Unicode character
  
  value - the Unicode character value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setInt
  
  void setInt(String name, int value) throws JMSException
  
  Sets an int value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the int
  
  value - the int value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setLong
  
  void setLong(String name, long value) throws JMSException
  
  Sets a long value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the long
  
  value - the long value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setFloat
  
  void setFloat(String name, float value) throws JMSException
  
  Sets a float value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the float
  
  value - the float value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setDouble
  
  void setDouble(String name, double value) throws JMSException
  
  Sets a double value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the double
  
  value - the double value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setString
  
  void setString(String name, String value) throws JMSException
  
  Sets a String value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the String
  
  value - the String value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setBytes
  
  void setBytes(String name, byte[] value) throws JMSException
  
  Sets a byte array value with the specified name into the Map.
  
  Parameters:
  
  name - the name of the byte array
  
  value - the byte array value to set in the Map; the array is copied so that the value for name will not be altered by future modifications
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null, or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setBytes
  
  void setBytes(String name, byte[] value, int offset, int length) throws JMSException
  
  Sets a portion of the byte array value with the specified name into the Map.
  
  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:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageNotWriteableException - if the message is in read-only mode.
- setObject
  
  void setObject(String name, Object value) throws JMSException
  
  Sets an object value with the specified name into the Map.
  This method works only for the objectified primitive object types (Integer, Double, Long ...), String objects, and byte arrays.
  
  Parameters:
  
  name - the name of the Java object
  
  value - the Java object value to set in the Map
  
  Throws:
  
  JMSException - if the JMS provider fails to write the message due to some internal error.
  
  IllegalArgumentException - if the name is null or if the name is an empty string.
  
  MessageFormatException - if the object is invalid.
  
  MessageNotWriteableException - if the message is in read-only mode.
- itemExists
  
  boolean itemExists(String name) throws JMSException
  
  Indicates whether an item exists in this MapMessage object.
  
  Parameters:
  
  name - the name of the item to test
  
  Returns:
  
  true if the item exists
  
  Throws:
  
  JMSException - if the JMS provider fails to determine if the item exists due to some internal error.

Interface MapMessage

Field Summary

Fields inherited from interface javax.jms.Message

Method Summary

Methods inherited from interface javax.jms.Message

Method Details

getBoolean

getByte

getShort

getChar

getInt

getLong

getFloat

getDouble

getString

getBytes

getObject

getMapNames

setBoolean

setByte

setShort

setChar

setInt

setLong

setFloat

setDouble

setString

setBytes

setBytes

setObject

itemExists