org.apache.commons.jexl.parser

Class ASTEQNode

java.lang.Object

org.apache.commons.jexl.parser.SimpleNode

org.apache.commons.jexl.parser.ASTEQNode

All Implemented Interfaces:

Node

public class ASTEQNode
extends SimpleNode

Represents equality between values. If the values are of the same class, .equals() is used. If either value is a Float or Double (but both are not the same class), the values are coerced to Doubles before comparing. If either value is a Number or Character (but both are not the same class), the values are coerced to Longs before comparing. If either value is a Boolean (but both are not the same class), the values are coerced to Booleans before comparing. If either value is a String (but both are not the same class), toString() is called on both before comparing. Otherwise left.equals(right) is returned.

Version:

$Id: ASTEQNode.java 398190 2006-04-29 16:04:10Z dion $

Author:

Geir Magnusson Jr.

Field Summary

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

children, id, parent, parser

Constructor Summary

Constructors

Constructor and Description
ASTEQNode(int id) Create the node given an id.
ASTEQNode(Parser p, int id) Create a node with the given parser and id.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data) Accept the visitor.
java.lang.Object	value(JexlContext pc) Gets the value of this node.

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

childrenAccept, dump, execute, interpret, jjtAddChild, jjtClose, 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

Constructor Detail

ASTEQNode

public ASTEQNode(int id)

Create the node given an id.

Parameters:

id - node id.

ASTEQNode

public ASTEQNode(Parser p,
                 int id)

Create a node with the given parser and id.

Parameters:

p - a parser.

id - node 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

Parameters:

visitor - a ParserVisitor.

data - data to be passed along to the visitor.

Returns:

the value from visiting.

See Also:

ParserVisitor.visit(org.apache.commons.jexl.parser.SimpleNode, java.lang.Object)

value

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

Gets the value of this node.

Overrides:

value in class SimpleNode

Parameters:

pc - the context to retrieve values from.

Returns:

the value of the node.

Throws:

java.lang.Exception - when evaluating the operands fails.