org.apache.commons.jexl.parser
Class ASTReference

java.lang.Object
  org.apache.commons.jexl.parser.SimpleNode
      org.apache.commons.jexl.parser.ASTReference

All Implemented Interfaces:

Node

public class ASTReference

extends SimpleNode

reference - any variable expression

Version:

$Id: ASTReference.java,v 1.4 2004/09/01 00:35:38 dion Exp $

Author:

Geir Magnusson Jr.

Field Summary

(package private) SimpleNode

root

Fields inherited from class org.apache.commons.jexl.parser.SimpleNode

children, id, parent, parser

Constructor Summary

ASTReference(int id)

ASTReference(Parser p, int id)

Method Summary

java.lang.Object	execute(java.lang.Object obj, JexlContext jc) Used to let a node calcuate it's value..
private java.lang.String	getIdentifierToDepth(int i) This method returns a variable from this identifier and it's children.
java.lang.String	getRootString()
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data) Accept the visitor.
void	jjtClose() This method is called after all the child nodes have been added.
java.lang.Object	value(JexlContext jc) Returns the value of the node.

Methods inherited from class org.apache.commons.jexl.parser.SimpleNode

childrenAccept, dump, interpret, jjtAddChild, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, setValue, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

root

SimpleNode root

Constructor Detail

ASTReference

public ASTReference(int id)

ASTReference

public ASTReference(Parser p,
                    int id)

Method Detail

jjtAccept

public java.lang.Object jjtAccept(ParserVisitor visitor,
                                  java.lang.Object data)

Accept the visitor.

Specified by:

jjtAccept in interface Node

Overrides:

jjtAccept in class SimpleNode

value

public java.lang.Object value(JexlContext jc)
                       throws java.lang.Exception

Description copied from class: SimpleNode

Returns the value of the node.

Overrides:

value in class SimpleNode

Throws:

java.lang.Exception

jjtClose

public void jjtClose()

Description copied from interface: Node

This method is called after all the child nodes have been added.

Specified by:

jjtClose in interface Node

Overrides:

jjtClose in class SimpleNode

execute

public java.lang.Object execute(java.lang.Object obj,
                                JexlContext jc)
                         throws java.lang.Exception

Description copied from class: SimpleNode

Used to let a node calcuate it's value..

Overrides:

execute in class SimpleNode

Throws:

java.lang.Exception

getIdentifierToDepth

private java.lang.String getIdentifierToDepth(int i)

This method returns a variable from this identifier and it's children. For an expression like 'a.b.c', a is child zero, b is child 1 and c is child 2.

Parameters:

i - the depth of the child nodes to go to

Returns:

the a dotted variable from this identifier and it's child nodes.

getRootString

public java.lang.String getRootString()
                               throws java.lang.Exception

Throws:

java.lang.Exception