[VELOCITY-102] Add Support for Static Utility Classes - ASF JIRA

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Support for Static Utility Classes is:

1) define namespaces

context.defineNamespace("Math").add( java.lang.Math.class ) ;
used as $Math.sin(0)

2) Add / Replace / remove methods in namespace :

context.getNamespace("Math").add(MyRandom.class.getMethod("randomString",new
Class[]

{int.class}

))
used as $Math.randomString(12)

3) "union" on namespaces

context.defineNamespace("Utils")
.add(context.getNamespace("Math"))
.add(context.defineNamespace("Collections",Collections.class ) );

used as:
$Utils.sin(0)
$Utils.sort($list)

4) Global namespace

context.getGlobalNamespace().add( Math.class );
used as $sin(0)

5) inline namespaces:

#use java.lang.Math as Math
$Math.sin(0)
#end

#with Math
$sin(0)
#end