Package org.apache.velocity.runtime.parser.node

Class ASTAndNode

java.lang.Object

org.apache.velocity.runtime.parser.node.SimpleNode

org.apache.velocity.runtime.parser.node.ASTBinaryOperator

org.apache.velocity.runtime.parser.node.ASTLogicalOperator

org.apache.velocity.runtime.parser.node.ASTAndNode

All Implemented Interfaces:

Cloneable, Node, Renderable

public class ASTAndNode
extends ASTLogicalOperator

Please look at the Parser.jjt file which is what controls the generation of this class.

Version:

$Id$

Author:

Jason van Zyl, Geir Magnusson Jr.

Field Summary

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

children, column, first, firstImage, id, info, invalid, last, lastImage, line, literal, log, parent, parser, rsvc, state, template

Constructor Summary

Constructors

Constructor	Description
ASTAndNode(int id)
ASTAndNode(Parser p, int id)

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(InternalContextAdapter context)	logical and :
String	getLiteralOperator()	get the string representing the mathematical operator
Object	jjtAccept(StandardParserVisitor visitor, Object data)
Object	value(InternalContextAdapter context)	Returns the value of the expression.

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

init

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

literal

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

childrenAccept, cleanupParserAndTokens, clone, clone, dump, dump, dump, execute, getColumn, getFirstToken, getFirstTokenImage, getInfo, getLastToken, getLastTokenImage, getLine, getLocation, getParser, getRuntimeServices, getTemplate, getTemplateName, getType, isInvalid, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, render, saveTokenImages, setFirstToken, setInfo, setInvalid, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTAndNode

public ASTAndNode(int id)

Parameters:

id -

ASTAndNode

public ASTAndNode(Parser p,
                  int id)

Parameters:

p -

id -

Method Detail

getLiteralOperator

public String getLiteralOperator()

Description copied from class: ASTBinaryOperator

get the string representing the mathematical operator

Specified by:

getLiteralOperator in class ASTBinaryOperator

Returns:

operator string

jjtAccept

public Object jjtAccept(StandardParserVisitor visitor,
                        Object data)

Specified by:

jjtAccept in interface Node

Overrides:

jjtAccept in class SimpleNode

Returns:

The Node execution result object.

See Also:

SimpleNode.jjtAccept(org.apache.velocity.runtime.parser.node.StandardParserVisitor, java.lang.Object)

value

public Object value(InternalContextAdapter context)
             throws MethodInvocationException

Returns the value of the expression. Since the value of the expression is simply the boolean result of evaluate(), lets return that.

Specified by:

value in interface Node

Overrides:

value in class SimpleNode

Parameters:

context -

Returns:

The value of the expression.

Throws:

MethodInvocationException

See Also:

Node.value(org.apache.velocity.context.InternalContextAdapter)

evaluate

public boolean evaluate(InternalContextAdapter context)
                 throws MethodInvocationException

logical and :

   null && right = false
   left && null = false
   null && null = false
 

Specified by:

evaluate in interface Node

Overrides:

evaluate in class SimpleNode

Parameters:

context -

Returns:

True if both sides are true.

Throws:

MethodInvocationException

See Also:

Node.evaluate(org.apache.velocity.context.InternalContextAdapter)