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

java.lang.Object
  extended by org.apache.velocity.runtime.parser.node.SimpleNode
      extended by 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)


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