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By default there isn't much you have to do to use the new compilation abilities in OGNL.  Following is an example of compiling a simple property expression and invoking it.

Code Blocknoformat
SimpleObject root = new SimpleObject();OgnlContext context =  (OgnlContext) Ognl.createDefaultContext(null);  Node node =  (Node) Ognl.compileExpression(context, root, "user.name");String userName = node.getAccessor().get(context, root);