cgl.narada.matching.xpath
Class XPathMatching

java.lang.Object
  cgl.narada.matching.xpath.XPathMatching

All Implemented Interfaces:

XPathMatchingDebugFlags, XPathMatchingTree

public class XPathMatching
extends Object
implements XPathMatchingTree, XPathMatchingDebugFlags

This class implements the XPATH matching algorithm. This provides methods to add a subscription and also to remove interest in a subscription predicate. The matching algorithm should also be able to compute destinations.

Field Summary

Fields inherited from interface cgl.narada.matching.xpath.XPathMatchingDebugFlags

ClientXPathMatching_Debug, XPathMatching_Debug, XPathProfile_Debug

Constructor Summary

XPathMatching(int unitLevel, int systemLevel, XPathProfilePropagation xPathPropagate)
The XPathMatching constructor

Method Summary

void	addSubscriptionProfile(XPathProfile profile) This method adds a subscription predicate to the matching tree
boolean	documentMatchesXPathQuery(Document document, String xpath)
int	getMatchingLevel() This method returns the level assocaited with this matching tree.
static void	main(String[] args)
int	matchEvent(XmlEvent xmlEvent) This method return the destinations assocaited with an event that needs to be matched to the matching tree
void	propagateChangesToHigherLevels(XPathProfile xPathProfile, boolean addProfile)
void	removeSubscriptionProfile(XPathProfile profile) This method removes a subscription predicate to the matching tree
void	setNodeDestination(Destinations destination) This method sets the destination address for this node

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathMatching

public XPathMatching(int unitLevel,
                     int systemLevel,
                     XPathProfilePropagation xPathPropagate)

The XPathMatching constructor

Method Detail

getMatchingLevel

public int getMatchingLevel()

This method returns the level assocaited with this matching tree. A node could be a gateway at multiple levels. How it handles destinations at different levels, and propagates destinations at different levels is dicatated by the level of the matching tree which computes the destinations and initiates profile propagation changes.

Returns:

The level of the matching tree.

setNodeDestination

public void setNodeDestination(Destinations destination)

This method sets the destination address for this node

Specified by:

setNodeDestination in interface XPathMatchingTree

addSubscriptionProfile

public void addSubscriptionProfile(XPathProfile profile)

This method adds a subscription predicate to the matching tree

Specified by:

addSubscriptionProfile in interface XPathMatchingTree

Parameters:

profile - The predicate comprising the subscription and the destination assocaited with the subscription.

removeSubscriptionProfile

public void removeSubscriptionProfile(XPathProfile profile)

This method removes a subscription predicate to the matching tree

Specified by:

removeSubscriptionProfile in interface XPathMatchingTree

Parameters:

profile - The predicate comprising the subscription and the destination assocaited with the subscription.

propagateChangesToHigherLevels

public void propagateChangesToHigherLevels(XPathProfile xPathProfile,
                                           boolean addProfile)

Specified by:

propagateChangesToHigherLevels in interface XPathMatchingTree

matchEvent

public int matchEvent(XmlEvent xmlEvent)

This method return the destinations assocaited with an event that needs to be matched to the matching tree

Returns:

The destination as an INT

documentMatchesXPathQuery

public boolean documentMatchesXPathQuery(Document document,
                                         String xpath)

main

public static void main(String[] args)