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

java.lang.Object
  org.apache.velocity.runtime.parser.node.SimpleNode
      org.apache.velocity.runtime.parser.node.ASTComparisonNode

All Implemented Interfaces:

Node, Renderable

Direct Known Subclasses:

ASTEQNode, ASTGENode, ASTGTNode, ASTLENode, ASTLTNode

public abstract class ASTComparisonNode
extends SimpleNode

Numeric comparison support

Author:

Will Glass-Husain, Peter Romianowski, Nathan Bubna

Field Summary

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

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

Constructor Summary

ASTComparisonNode(int id)

ASTComparisonNode(Parser p, int id)

Method Summary

boolean	compareNonNumber(Object left, Object right)
boolean	compareNull(Object left, Object right) Always false by default, != and == subclasses must override this.
Boolean	compareNumbers(Object left, Object right)
boolean	evaluate(InternalContextAdapter context)
Object	jjtAccept(ParserVisitor visitor, Object data)
abstract boolean	numberTest(int compareResult)
Object	value(InternalContextAdapter context)

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTComparisonNode

public ASTComparisonNode(int id)

Parameters:

id -

ASTComparisonNode

public ASTComparisonNode(Parser p,
                         int id)

Parameters:

p -

id -

Method Detail

jjtAccept

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

evaluate

public boolean evaluate(InternalContextAdapter context)
                 throws MethodInvocationException

Specified by:

evaluate in interface Node

Overrides:

evaluate in class SimpleNode

Returns:

The evaluation result.

Throws:

MethodInvocationException

See Also:

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

compareNull

public boolean compareNull(Object left,
                           Object right)

Always false by default, != and == subclasses must override this.

compareNumbers

public Boolean compareNumbers(Object left,
                              Object right)

numberTest

public abstract boolean numberTest(int compareResult)

compareNonNumber

public boolean compareNonNumber(Object left,
                                Object right)

value

public Object value(InternalContextAdapter context)
             throws MethodInvocationException

Specified by:

value in interface Node

Overrides:

value in class SimpleNode

Returns:

The node value.

Throws:

MethodInvocationException

See Also:

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