org.scijava.plugin
Class AbstractSingletonService<PT extends SingletonPlugin>

java.lang.Object
  org.scijava.AbstractContextual
      org.scijava.plugin.AbstractRichPlugin
          org.scijava.service.AbstractService
              org.scijava.plugin.AbstractPTService<PT>
                  org.scijava.plugin.AbstractSingletonService<PT>

Type Parameters:

PT - Plugin type of the SingletonPlugins being managed.

All Implemented Interfaces:

Comparable<Prioritized>, Contextual, Disposable, HasPluginInfo, PTService<PT>, RichPlugin, SciJavaPlugin, SingletonService<PT>, Prioritized, Service

Direct Known Subclasses:

AbstractHandlerService

public abstract class AbstractSingletonService<PT extends SingletonPlugin>
extends AbstractPTService<PT>
implements SingletonService<PT>

Abstract base class for SingletonServices.

Author:

Curtis Rueden

Constructor Summary

AbstractSingletonService()

Method Summary

protected List<? extends PT>	filterInstances(List<PT> list) Allows subclasses to exclude instances.
<P extends PT> P	getInstance(Class<P> pluginClass) Gets the singleton plugin instance of the given class.
List<PT>	getInstances() Gets the list of plugin instances.
void	initialize() Performs any needed initialization when the service is first loaded.

Methods inherited from class org.scijava.plugin.AbstractPTService

getPlugins, getPluginService

Methods inherited from class org.scijava.service.AbstractService

dispose, getContext, registerEventHandlers, setContext, toString

Methods inherited from class org.scijava.plugin.AbstractRichPlugin

compareTo, getInfo, getPriority, setInfo, setPriority

Methods inherited from class org.scijava.AbstractContextual

context

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.scijava.plugin.PTService

getPlugins, getPluginService, getPluginType

Methods inherited from interface org.scijava.service.Service

registerEventHandlers

Methods inherited from interface org.scijava.Contextual

context, getContext, setContext

Methods inherited from interface org.scijava.Prioritized

getPriority, setPriority

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface org.scijava.plugin.HasPluginInfo

getInfo, setInfo

Methods inherited from interface org.scijava.Disposable

dispose

Constructor Detail

AbstractSingletonService

public AbstractSingletonService()

Method Detail

getInstances

public List<PT> getInstances()

Description copied from interface: SingletonService

Gets the list of plugin instances. There will be one singleton instance for each available plugin.

Specified by:

getInstances in interface SingletonService<PT extends SingletonPlugin>

getInstance

public <P extends PT> P getInstance(Class<P> pluginClass)

Description copied from interface: SingletonService

Gets the singleton plugin instance of the given class.

Specified by:

getInstance in interface SingletonService<PT extends SingletonPlugin>

initialize

public void initialize()

Description copied from interface: Service

Performs any needed initialization when the service is first loaded.

NB: This method is not intended to be called directly. It is called by the service framework itself (specifically by the ServiceHelper) when initializing the service. It should not be called a second time.

Specified by:

initialize in interface Service

Overrides:

initialize in class AbstractService

filterInstances

protected List<? extends PT> filterInstances(List<PT> list)

Allows subclasses to exclude instances.

Parameters:

list - the initial list of instances

Returns:

the filtered list of instances