org.apache.stanbol.enhancer.engines.entityhublinking
Class TrackingEntitySearcher<T>

java.lang.Object
  org.apache.stanbol.enhancer.engines.entityhublinking.TrackingEntitySearcher<T>

All Implemented Interfaces:

org.apache.stanbol.enhancer.engines.entitylinking.EntitySearcher

Direct Known Subclasses:

EntityhubSearcher, ReferencedSiteSearcher

public abstract class TrackingEntitySearcher<T>
extends Object
implements org.apache.stanbol.enhancer.engines.entitylinking.EntitySearcher

Abstract super class for EntitySearchers that need to track the OSGI service used to lookup Entities. Used by the EntityhubSearcher and the ReferencedSiteSearcher implementation

Author:

Rupert Westenthaler

Field Summary

protected org.osgi.framework.BundleContext

bundleContext

Constructor Summary

protected

TrackingEntitySearcher(org.osgi.framework.BundleContext context, Class<T> serviceClass, Map<String,String> filterEntries, org.osgi.util.tracker.ServiceTrackerCustomizer customizer) Creates a new instance for the parsed parameter

Method Summary

void	close() Closes the ServiceTracker used to track the service.
protected void	finalize()
protected T	getSearchService() Getter for the Service used to search for Entities.
void	open() Starts the tracking by calling ServiceTracker.open()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.stanbol.enhancer.engines.entitylinking.EntitySearcher

get, getLimit, getOriginInformation, lookup, supportsOfflineMode

Field Detail

bundleContext

protected org.osgi.framework.BundleContext bundleContext

Constructor Detail

TrackingEntitySearcher

protected TrackingEntitySearcher(org.osgi.framework.BundleContext context,
                                 Class<T> serviceClass,
                                 Map<String,String> filterEntries,
                                 org.osgi.util.tracker.ServiceTrackerCustomizer customizer)

Creates a new instance for the parsed parameter

Parameters:

context - the BundleContexed used to create the ServiceTracker listening for the SearchService

serviceClass -

filterEntries -

Method Detail

open

public void open()

Starts the tracking by calling ServiceTracker.open()

getSearchService

protected T getSearchService()

Getter for the Service used to search for Entities. If the service is currently not available, than this method will return null

Returns:

The service of null if not available

close

public void close()

Closes the ServiceTracker used to track the service.

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable