Revision [1580]

This is an old revision of JavaObjects made by DavidLee on 2010-11-18 13:47:27.


Java Objects

Version 1.1 introduced direct support for creating native Java Objects, invoking both static and instance methods, storing Java Objects in Variables and passing object references through Command Invocation and Function Calls.

Java Objects can be created in xmlsh scripting language or passed in externally via one of the integration API's.
Java Objects may be passed to commands and functions (including user defined modules) as well as set into variables accessible by any xmlsh script code, functions, commands or modules.

Creating a Java Object

To create a Java Object use either the Function jnew or the Command jset.

For example, to create a Date object and assign it to variable "date" you can either


jset -v date -c java.util.Date

To see the object has been created properly and of the right type, use the Commmand xtype.

xtype $date


With jnew you can create Java Objects with non-default constructors.
Example: create an Integer with the value 123

i=jnew(java.lang.Integer 123)
xtype $i
echo $i


Converting To Strings

To convert an object to a String, simply use it in any string context or pass it as an argument to a command that accepts strings.
( Note this actually converts the object to an XDM string type, not the java String type.
xtype $date
echo $date
xtype "$date"
echo "The date is $date"

Thu Nov 18 16:40:58 EST 2010
echo "The date is $date"

To get a real Java java.lang.String object you can use the toString() method ( using the Method Call syntax below)

xtype date.toString()


For most uses, xs:string and java.lang.String are interchangable.

Calling Instance Methods

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