com.caucho.xpath.pattern
Class FromExpr

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

public class FromExpr
extends AbstractPattern

matches if the expression returns a node set and the test-node is contained in that node set.

The code interprets Iterators, ArrayLists, and Nodes as node sets.

Field Summary

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

_child, _parent, log, XMLNS

Constructor Summary

FromExpr(AbstractPattern parent, Expr expr)

Method Summary

int	count(org.w3c.dom.Node node, Env env, AbstractPattern pattern) The count is the size of the expression node-set.
NodeIterator	createNodeIterator(org.w3c.dom.Node node, ExprEnvironment env, AbstractPattern match) Creates a new node iterator.
boolean	match(org.w3c.dom.Node node, ExprEnvironment env) matches if the expression returns a node set and the test-node is contained in that node set.
int	position(org.w3c.dom.Node node, Env env, AbstractPattern pattern) The position is the position in the expression node-set.
java.lang.String	toString()

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

copyAxis, copyPosition, findAny, firstNode, getNodeName, getParent, getPrefix, getPriority, isAscending, isStrictlyAscending, 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

FromExpr

public FromExpr(AbstractPattern parent,
                Expr expr)

Method Detail

match

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

matches if the expression returns a node set and the test-node is contained in that node set.

Specified by:

match in class AbstractPattern

Parameters:

node - the node to test

env - the variable environment.

Returns:

true if the node matches the pattern.

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

position

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

The position is the position in the expression node-set.

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

The count is the size of the expression node-set.

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object