Package org.scijava.plugin

Interface SingletonService<PT extends SingletonPlugin>

Type Parameters:

PT - Plugin type of the plugins being managed.

All Superinterfaces:

Comparable<Prioritized>, Contextual, Disposable, HasPluginInfo, Identifiable, Initializable, Locatable, Logged, Prioritized, PTService<PT>, RichPlugin, SciJavaPlugin, Service, Versioned

All Known Subinterfaces:

AppService, ConsoleService, ConvertService, DragAndDropService, HandlerService<DT,PT>, IOService, LocationService, OptionsService, PlatformService, RunService, ScriptHeaderService, ScriptService, TextIOService, TextService, ToolService, TypedIOService<D>

All Known Implementing Classes:

AbstractConvertService, AbstractHandlerService, AbstractSingletonService, AbstractTypedIOService, DefaultAppService, DefaultConsoleService, DefaultConvertService, DefaultDragAndDropService, DefaultIOService, DefaultLocationService, DefaultOptionsService, DefaultPlatformService, DefaultRunService, DefaultScriptHeaderService, DefaultScriptService, DefaultTextIOService, DefaultTextService, DefaultToolService

public interface SingletonService<PT extends SingletonPlugin>
extends PTService<PT>

A service for managing SingletonPlugins of a particular type. The SingletonService creates and maintain a list of singleton instances.

Note that like PTService, TypedService and WrapperService, SingletonService is not a service interface defining API for a specific concrete service implementation, but rather a more general layer in a type hierarchy intended to ease creation of services that fit its pattern.

Author:

Curtis Rueden

See Also:

PTService

Method Summary

Modifier and Type	Method	Description
default <P extends PT> P	create(Class<P> pluginClass)	Creates an instance of the given plugin class.
default List<? extends PT>	filterInstances(List<PT> list)	Filters the given list of instances by this service's inclusion criteria.
<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.
default void	initialize()	Performs any needed initialization when the service is first loaded.
default ObjectService	objectService()	Gets the ObjectService upon which this service depends.

Methods inherited from interface org.scijava.Contextual

context, getContext, setContext

Methods inherited from interface org.scijava.Disposable

dispose

Methods inherited from interface org.scijava.plugin.HasPluginInfo

getInfo, setInfo

Methods inherited from interface org.scijava.Locatable

getLocation

Methods inherited from interface org.scijava.Prioritized

compareTo, getPriority, setPriority

Methods inherited from interface org.scijava.plugin.PTService

getPlugins, getPluginService, getPluginType, pluginService

Methods inherited from interface org.scijava.plugin.RichPlugin

getIdentifier, log

Methods inherited from interface org.scijava.service.Service

registerEventHandlers

Methods inherited from interface org.scijava.Versioned

getVersion

Method Detail

objectService

default ObjectService objectService()

Gets the ObjectService upon which this service depends.

getInstances

List<PT> getInstances()

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

getInstance

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

Gets the singleton plugin instance of the given class.

filterInstances

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

Filters the given list of instances by this service's inclusion criteria.

Parameters:

list - the initial list of instances

Returns:

the filtered list of instances

create

default <P extends PT> P create(Class<P> pluginClass)

Description copied from interface: PTService

Creates an instance of the given plugin class.

Specified by:

create in interface PTService<PT extends SingletonPlugin>

initialize

default 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 Initializable

Specified by:

initialize in interface Service