MapMessage

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:

Session.createMapMessage(), BytesMessage, Message, ObjectMessage, StreamMessage, TextMessage

Field Summary
- Fields inherited from interface jakarta.jms.Message
  DEFAULT_DELIVERY_DELAY, DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`boolean`	`getBoolean(java.lang.String name)` Returns the `boolean` value with the specified name.
`byte`	`getByte(java.lang.String name)` Returns the `byte` value with the specified name.
`byte[]`	`getBytes(java.lang.String name)` Returns the byte array value with the specified name.
`char`	`getChar(java.lang.String name)` Returns the Unicode character value with the specified name.
`double`	`getDouble(java.lang.String name)` Returns the `double` value with the specified name.
`float`	`getFloat(java.lang.String name)` Returns the `float` value with the specified name.
`int`	`getInt(java.lang.String name)` Returns the `int` value with the specified name.
`long`	`getLong(java.lang.String name)` Returns the `long` value with the specified name.
`java.util.Enumeration`	`getMapNames()` Returns an `Enumeration` of all the names in the `MapMessage` object.
`java.lang.Object`	`getObject(java.lang.String name)` Returns the value of the object with the specified name.
`short`	`getShort(java.lang.String name)` Returns the `short` value with the specified name.
`java.lang.String`	`getString(java.lang.String name)` Returns the `String` value with the specified name.
`boolean`	`itemExists(java.lang.String name)` Indicates whether an item exists in this `MapMessage` object.
`void`	`setBoolean(java.lang.String name, boolean value)` Sets a `boolean` value with the specified name into the Map.
`void`	`setByte(java.lang.String name, byte value)` Sets a `byte` value with the specified name into the Map.
`void`	`setBytes(java.lang.String name, byte[] value)` Sets a byte array value with the specified name into the Map.
`void`	`setBytes(java.lang.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(java.lang.String name, char value)` Sets a Unicode character value with the specified name into the Map.
`void`	`setDouble(java.lang.String name, double value)` Sets a `double` value with the specified name into the Map.
`void`	`setFloat(java.lang.String name, float value)` Sets a `float` value with the specified name into the Map.
`void`	`setInt(java.lang.String name, int value)` Sets an `int` value with the specified name into the Map.
`void`	`setLong(java.lang.String name, long value)` Sets a `long` value with the specified name into the Map.
`void`	`setObject(java.lang.String name, java.lang.Object value)` Sets an object value with the specified name into the Map.
`void`	`setShort(java.lang.String name, short value)` Sets a `short` value with the specified name into the Map.
`void`	`setString(java.lang.String name, java.lang.String value)` Sets a `String` value with the specified name into the Map.

Methods inherited from interface jakarta.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 Detail
  - getBoolean
```
boolean getBoolean(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getByte
```
byte getByte(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getShort
```
short getShort(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getChar
```
char getChar(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getInt
```
int getInt(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getLong
```
long getLong(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getFloat
```
float getFloat(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getDouble
```
double getDouble(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getString
```
java.lang.String getString(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getBytes
```
byte[] getBytes(java.lang.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 Jakarta Messaging provider fails to read the message due to some internal error.
    
    MessageFormatException - if this type conversion is invalid.
  - getObject
```
java.lang.Object getObject(java.lang.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 settype 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 Jakarta Messaging provider fails to read the message due to some internal error.
  - getMapNames
```
java.util.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 Jakarta Messaging provider fails to read the message due to some internal error.
  - setBoolean
```
void setBoolean(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.String name,
               java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.String name,
               java.lang.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 Jakarta Messaging provider fails to write the message due to some internal error.
    
    java.lang.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(java.lang.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 Jakarta Messaging provider fails to determine if the item exists due to some internal error.

Interface MapMessage

Field Summary

Fields inherited from interface jakarta.jms.Message

Method Summary

Methods inherited from interface jakarta.jms.Message

Method Detail

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