net.sf.joost.grammar.tree
Class AttrLocalWildcardTree

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

public final class AttrLocalWildcardTree
extends Tree

Objects of AttrLocalWildcardTree represent attribute tests nodes of the form '@ns:*' in the syntax tree of a pattern or an STXPath expression.

Version:
$Revision: 1.3 $ $Date: 2007/11/25 14:18:01 $
Author:
Oliver Becker

Field Summary
private  String prefix
           
 
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
AttrLocalWildcardTree(String prefix, ParseContext context)
          Constructs an AttrLocalWildcardTree object with a given namespace prefix
 
Method Summary
 Value evaluate(Context context, int top)
          Evaluates the current Tree if it represents an expression.
 double getPriority()
          Returns the default priority of the STXPath pattern represented by this tree.
 boolean isConstant()
           
 boolean matches(Context context, int top, boolean setPosition)
          Determines if the event stack matches the pattern represented by this Tree object.
 
Methods inherited from class net.sf.joost.grammar.Tree
deepCopy, evaluate, reverseAssociativity, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

prefix

private String prefix
Constructor Detail

AttrLocalWildcardTree

public AttrLocalWildcardTree(String prefix,
                             ParseContext context)
                      throws SAXParseException
Constructs an AttrLocalWildcardTree object with a given namespace prefix

Parameters:
prefix - the namespace prefix
context - the parse context
Throws:
SAXParseException
Method Detail

matches

public boolean matches(Context context,
                       int top,
                       boolean setPosition)
                throws SAXException
Description copied from class: Tree
Determines if the event stack matches the pattern represented by this Tree object.

Overrides:
matches in class Tree
Parameters:
context - the Context object
top - the part of the stack to be considered while matching (the upper most element is at position top-1)
setPosition - true if the context position (Context.position) should be set in case the event stack matches this pattern
Returns:
true if the stack matches the pattern represented by this Tree.
Throws:
SAXException

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

getPriority

public double getPriority()
Description copied from class: Tree
Returns the default priority of the STXPath pattern represented by this tree.

Overrides:
getPriority in class Tree

isConstant

public boolean isConstant()
Overrides:
isConstant in class Tree
Returns:
whether the expression represented by this tree is constant