com.caucho.xpath.pattern
Class UnionPattern

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

public class UnionPattern
extends AbstractPattern

Implementation of the 'a|b' pattern. It's made public so XSLT can separate the left and right sides.

Field Summary

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

_child, _parent, log, XMLNS

Constructor Summary

UnionPattern(AbstractPattern left, AbstractPattern right)

Method Summary

int	count(org.w3c.dom.Node node, Env env, AbstractPattern pattern) Returns the number of nodes in its context for a match pattern.
NodeIterator	createNodeIterator(org.w3c.dom.Node node, ExprEnvironment env, AbstractPattern match) Creates a new node iterator.
AbstractPattern	getLeft() Return left node of the union.
AbstractPattern	getRight() Return right node of the union.
boolean	isStrictlyAscending() Returns true if the nodes are ascending.
boolean	match(org.w3c.dom.Node node, ExprEnvironment env) Match if either pattern matches.
int	position(org.w3c.dom.Node node, Env env, AbstractPattern pattern) Returns the position of the node in its context for a match pattern.
java.lang.String	toString()

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

copyAxis, copyPosition, findAny, firstNode, getNodeName, getParent, getPrefix, getPriority, isAscending, isUnique, lastNode, nextNode, select, selectUnique, toPatternString

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionPattern

public UnionPattern(AbstractPattern left,
                    AbstractPattern right)

Method Detail

match

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

Match if either pattern matches.

Specified by:

match in class AbstractPattern

Parameters:

node - the node to test

env - the variable environment

Returns:

true if the pattern matches.

Throws:

XPathException

isStrictlyAscending

public boolean isStrictlyAscending()

Returns true if the nodes are ascending.

Overrides:

isStrictlyAscending in class AbstractPattern

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 xpath environment

match - the axis match pattern

Returns:

the node iterator

Throws:

XPathException

position

public int position(org.w3c.dom.Node node,
                    Env env,
                    AbstractPattern pattern)
             throws XPathException

Description copied from class: AbstractPattern

Returns the position of the node in its context for a match pattern.

Overrides:

position in class AbstractPattern

Parameters:

node - the current node

env - the variable environment

pattern - the position pattern

Returns:

the node's position.

Throws:

XPathException

count

public int count(org.w3c.dom.Node node,
                 Env env,
                 AbstractPattern pattern)
          throws XPathException

Description copied from class: AbstractPattern

Returns the number of nodes in its context for a match pattern.

Overrides:

count in class AbstractPattern

Parameters:

node - the current node

env - the variable environment

pattern - the position pattern

Returns:

the count of nodes in the match selection

Throws:

XPathException

getLeft

public AbstractPattern getLeft()

Return left node of the union.

getRight

public AbstractPattern getRight()

Return right node of the union.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object