JMSMapMessage
public class JMSMapMessage
extends JMSMessage
implements MapMessagejava.lang.Object | +----com.ibm.jms.JMSMessage | +----com.ibm.jms.JMSMapMessage
JMSMapMessage is used to send a set of name/type/value triplets (see Message body for details). The entries can be accessed sequentially or randomly by name. The order of the entries is undefined. It adds a map message body.
The primitive types can be read or written explicitly using methods for each type. They can also be read or written generically as objects. For example, the call 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 then be both read from and written to.
Map messages support the following conversion table. The marked cases are supported and the unmarked cases throw a JMSException. The String to primitive conversions might 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 X byte[] X --------------------------------------------------------------------------
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