org.apache.velocity.runtime.parser.node
Class ASTEQNode

java.lang.Object
  |
  +--org.apache.velocity.runtime.parser.node.SimpleNode
        |
        +--org.apache.velocity.runtime.parser.node.ASTEQNode

All Implemented Interfaces:

Node

public class ASTEQNode

extends SimpleNode

Handles the equivalence operator == This operator requires that the LHS and RHS are both of the same Class.

Version:

$Id: ASTEQNode.java,v 1.8 2001/08/07 21:56:30 geirm Exp $

Fields inherited from class org.apache.velocity.runtime.parser.node.SimpleNode

children, first, id, info, invalid, last, parent, parser, rsvc, state

Constructor Summary

ASTEQNode(int id)

ASTEQNode(Parser p, int id)

Method Summary

boolean	evaluate(InternalContextAdapter context) Calculates the value of the logical expression arg1 == arg2 All class types are supported.
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data) Accept the visitor.

Methods inherited from class org.apache.velocity.runtime.parser.node.SimpleNode

childrenAccept, dump, execute, getColumn, getFirstToken, getInfo, getLastToken, getLine, getType, init, isInvalid, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, literal, render, setFirstToken, setInfo, setInvalid, toString, value

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTEQNode

public ASTEQNode(int id)

ASTEQNode

public ASTEQNode(Parser p,
                 int id)

Method Detail

jjtAccept

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

Accept the visitor.

Overrides:

jjtAccept in class SimpleNode

evaluate

public boolean evaluate(InternalContextAdapter context)
                 throws MethodInvocationException

Calculates the value of the logical expression arg1 == arg2 All class types are supported. Uses equals() to determine equivalence. This should work as we represent with the types we already support, and anything else that implements equals() to mean more than identical references.

Overrides:

evaluate in class SimpleNode

Parameters:

context - internal context used to evaluate the LHS and RHS

Returns:

true if equivalent, false if not equivalent, false if not compatible arguments, or false if either LHS or RHS is null