com.caucho.xpath.pattern
Class FilterPattern

java.lang.Object
  com.caucho.xpath.pattern.AbstractPattern
      com.caucho.xpath.pattern.FilterPattern

public class FilterPattern
extends AbstractPattern

matches a node if it matches a filter expression. Filter implements the a[b] pattern.

Field Summary

Fields inherited from class com.caucho.xpath.pattern.AbstractPattern

_child, _parent, log, XMLNS

Constructor Summary

FilterPattern(AbstractPattern parent, Expr expr)

Method Summary

AbstractPattern	copyPosition() Returns the position matching pattern.
NodeIterator	createNodeIterator(org.w3c.dom.Node node, ExprEnvironment env, AbstractPattern match) Creates a new node iterator.
Expr	getExpr() Returns the filter's expression.
java.lang.String	getNodeName() Returns the name of the matching node or '*' if many nodes match.
boolean	match(org.w3c.dom.Node node, ExprEnvironment env) Matches if the filter expression matches.
java.lang.String	toString()

Methods inherited from class com.caucho.xpath.pattern.AbstractPattern

copyAxis, count, findAny, firstNode, getParent, getPrefix, getPriority, isAscending, isStrictlyAscending, isUnique, lastNode, nextNode, position, select, selectUnique, toPatternString

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterPattern

public FilterPattern(AbstractPattern parent,
                     Expr expr)

Method Detail

getNodeName

public java.lang.String getNodeName()

Description copied from class: AbstractPattern

Returns the name of the matching node or '*' if many nodes match.

The Xsl package uses this to speed template matching.

Overrides:

getNodeName in class AbstractPattern

getExpr

public Expr getExpr()

Returns the filter's expression.

match

public boolean match(org.w3c.dom.Node node,
                     ExprEnvironment env)
              throws XPathException

Matches if the filter expression matches. When the filter expression returns a number, match if the position() equals the expression.

Specified by:

match in class AbstractPattern

Parameters:

node - the current node to test

env - the variable environment

Returns:

true if the pattern matches.

Throws:

XPathException

createNodeIterator

public NodeIterator createNodeIterator(org.w3c.dom.Node node,
                                       ExprEnvironment env,
                                       AbstractPattern match)
                                throws XPathException

Creates a new node iterator.

Overrides:

createNodeIterator in class AbstractPattern

Parameters:

node - the starting node

env - the variable environment

match - the axis match pattern

Returns:

the node iterator

Throws:

XPathException

copyPosition

public AbstractPattern copyPosition()

Description copied from class: AbstractPattern

Returns the position matching pattern.

Overrides:

copyPosition in class AbstractPattern

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object