net.sf.joost.grammar.tree
Class NeTree

java.lang.Object
  extended by net.sf.joost.grammar.Tree
      extended by net.sf.joost.grammar.tree.NeTree
All Implemented Interfaces:
Cloneable

public final class NeTree
extends Tree

Objects of NeTree represent comparison nodes (not equal, "!=") in the syntax tree of a pattern or an STXPath expression.

Version:
$Revision: 1.1 $ $Date: 2004/09/29 05:59:51 $
Author:
Oliver Becker

Field Summary
 
Fields inherited from class net.sf.joost.grammar.Tree
ADD, AND, ATTR, ATTR_LOCAL_WILDCARD, ATTR_URI_WILDCARD, ATTR_WILDCARD, AVT, CDATA_TEST, CHILD, COMMENT_TEST, DDOT, DESC, DIV, DOT, EQ, FUNCTION, GE, GT, LE, left, LIST, lName, LOCAL_WILDCARD, LT, MOD, MULT, NAME_TEST, NE, NODE_TEST, NUMBER, OR, PI_TEST, PREDICATE, right, ROOT, SEQ, STRING, SUB, TEXT_TEST, type, UNION, uri, URI_WILDCARD, value, VALUE, VAR, WILDCARD
 
Constructor Summary
NeTree(Tree left, Tree right)
           
 
Method Summary
 Value evaluate(Context context, int top)
          Evaluates the current Tree if it represents an expression.
 
Methods inherited from class net.sf.joost.grammar.Tree
deepCopy, evaluate, getPriority, isConstant, matches, reverseAssociativity, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

NeTree

public NeTree(Tree left,
              Tree right)
Method Detail

evaluate

public Value evaluate(Context context,
                      int top)
               throws SAXException
Description copied from class: Tree
Evaluates the current Tree if it represents an expression.

Overrides:
evaluate in class Tree
Parameters:
context - the current Context
top - the part of the stack to be considered for the evaluation (the upper most element is at position top-1)
Returns:
a new computed Value object containing the result
Throws:
SAXException