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java.lang.Object
- org.scijava.AbstractContextual
- - org.scijava.plugin.AbstractRichPlugin
  - - org.scijava.service.AbstractService
    - - org.scijava.plugin.DefaultPluginService

All Implemented Interfaces:

Comparable<Prioritized>, Contextual, Disposable, Identifiable, Initializable, Locatable, Logged, HasPluginInfo, PluginService, RichPlugin, SciJavaPlugin, Prioritized, SciJavaService, Service, Versioned
```
public class DefaultPluginService
extends AbstractService
implements PluginService
```
Default service for keeping track of available plugins.
Available plugins are discovered using indexes generated by using scijava-common as annotation processor. Loading of the actual plugin classes can be deferred until a particular plugin is actually needed.

Plugins are added or removed via the plugin service are reported via the event service. (No events are published for plugins directly added to or removed from the PluginIndex.)

Author:

Curtis Rueden, Johannes Schindelin

See Also:

SciJavaPlugin, Plugin

Constructor Summary

Constructors
Constructor and Description

DefaultPluginService()

Constructors
Constructor and Description
`DefaultPluginService()`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addPlugin(PluginInfo<?> plugin)` Manually registers a plugin with the plugin service.
`<T extends PluginInfo<?>> void`	`addPlugins(Collection<T> plugins)` Manually registers plugins with the plugin service.
`<PT extends SciJavaPlugin> PT`	`createInstance(PluginInfo<PT> info)` Creates an instance of the given plugin.
`<PT extends SciJavaPlugin> List<PT>`	`createInstances(List<PluginInfo<PT>> infos)` Creates an instance of each of the plugins on the given list.
`<PT extends SciJavaPlugin> List<PT>`	`createInstancesOfType(Class<PT> type)` Creates one instance each of the available plugins of the given type.
`static <T extends PluginInfo<?>> void`	`findPluginsOfClass(String className, List<? extends PluginInfo<?>> srcList, List<T> destList)` Transfers plugins of the given class from the source list to the destination list.
`PluginIndex`	`getIndex()` Gets the index of available plugins.
`<P extends SciJavaPlugin> PluginInfo<SciJavaPlugin>`	`getPlugin(Class<P> pluginClass)` Gets the first available plugin of the given class, or null if none.
`<PT extends SciJavaPlugin,P extends PT> PluginInfo<PT>`	`getPlugin(Class<P> pluginClass, Class<PT> type)` Gets the first available plugin of the given class, or null if none.
`PluginInfo<SciJavaPlugin>`	`getPlugin(String className)` Gets the first available plugin of the given class name, or null if none.
`List<PluginInfo<?>>`	`getPlugins()` Gets the list of known plugins.
`<P extends SciJavaPlugin> List<PluginInfo<SciJavaPlugin>>`	`getPluginsOfClass(Class<P> pluginClass)` Gets the list of plugins of the given class.
`<PT extends SciJavaPlugin,P extends PT> List<PluginInfo<PT>>`	`getPluginsOfClass(Class<P> pluginClass, Class<PT> type)` Gets the list of plugins of the given class.
`List<PluginInfo<SciJavaPlugin>>`	`getPluginsOfClass(String className)` Gets the list of plugins with the given class name.
`<PT extends SciJavaPlugin> List<PluginInfo<SciJavaPlugin>>`	`getPluginsOfClass(String className, Class<PT> type)` Gets the list of plugins with the given class name.
`<PT extends SciJavaPlugin> List<PluginInfo<PT>>`	`getPluginsOfType(Class<PT> type)` Gets the list of plugins of the given type (e.g., `Service`).
`static <PT extends SciJavaPlugin,P extends PT> Class<PT>`	`getPluginType(Class<P> pluginClass)` Gets the plugin type of the given plugin class, as declared by its `@Plugin` annotation (i.e., `Plugin.type()`).
`void`	`initialize()` Performs any needed initialization when the service is first loaded.
`void`	`reloadPlugins()` Rediscovers all plugins available on the classpath.
`void`	`removePlugin(PluginInfo<?> plugin)` Manually unregisters a plugin with the plugin service.
`<T extends PluginInfo<?>> void`	`removePlugins(Collection<T> plugins)` Manually unregisters plugins with the plugin service.

Methods inherited from class org.scijava.service.AbstractService
getContext, setContext, toString

Methods inherited from class org.scijava.plugin.AbstractRichPlugin
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.PluginService
sort

Methods inherited from interface org.scijava.service.Service
registerEventHandlers

Methods inherited from interface org.scijava.plugin.RichPlugin
getIdentifier, log

Methods inherited from interface org.scijava.Contextual
context, getContext, setContext

Methods inherited from interface org.scijava.Prioritized
compareTo, getPriority, setPriority

Methods inherited from interface org.scijava.plugin.HasPluginInfo
getInfo, setInfo

Methods inherited from interface org.scijava.Locatable
getLocation

Methods inherited from interface org.scijava.Versioned
getVersion

Methods inherited from interface org.scijava.Disposable
dispose

- Constructor Detail
 - DefaultPluginService
```
public DefaultPluginService()
```
- Method Detail
 - getIndex
```
public PluginIndex getIndex()
```
 Description copied from interface: PluginService
 
 Gets the index of available plugins.
 
 Specified by:
 
 getIndex in interface PluginService
 - reloadPlugins
```
public void reloadPlugins()
```
 Description copied from interface: PluginService
 
 Rediscovers all plugins available on the classpath. Note that this will clear any individual plugins added programmatically.
 
 Specified by:
 
 reloadPlugins in interface PluginService
 - addPlugin
```
public void addPlugin(PluginInfo<?> plugin)
```
 Description copied from interface: PluginService
 
 Manually registers a plugin with the plugin service.
 
 Specified by:
 
 addPlugin in interface PluginService
 - addPlugins
```
public <T extends PluginInfo<?>> void addPlugins(Collection<T> plugins)
```
 Description copied from interface: PluginService
 
 Manually registers plugins with the plugin service.
 
 Specified by:
 
 addPlugins in interface PluginService
 - removePlugin
```
public void removePlugin(PluginInfo<?> plugin)
```
 Description copied from interface: PluginService
 
 Manually unregisters a plugin with the plugin service.
 
 Specified by:
 
 removePlugin in interface PluginService
 - removePlugins
```
public <T extends PluginInfo<?>> void removePlugins(Collection<T> plugins)
```
 Description copied from interface: PluginService
 
 Manually unregisters plugins with the plugin service.
 
 Specified by:
 
 removePlugins in interface PluginService
 - getPlugins
```
public List<PluginInfo<?>> getPlugins()
```
 Description copied from interface: PluginService
 
 Gets the list of known plugins.
 
 Specified by:
 
 getPlugins in interface PluginService
 - getPlugin
```
public  PluginInfo<SciJavaPlugin> getPlugin(Class pluginClass)
```
 Description copied from interface: PluginService
 
 Gets the first available plugin of the given class, or null if none.
 
 Specified by:
 
 getPlugin in interface PluginService
 
 Type Parameters:
 
 P - The class of the plugin to look up.
 - getPlugin
```
public <PT extends SciJavaPlugin,P extends PT> PluginInfo<PT> getPlugin(Class pluginClass,
 Class<PT> type)
```
 Description copied from interface: PluginService
 
 Gets the first available plugin of the given class, or null if none.
 
 Specified by:
 
 getPlugin in interface PluginService
 
 Type Parameters:
 
 PT - The type of the plugin to look up; e.g., Service.class.
 
 P - The class of the plugin to look up.
 - getPlugin
```
public PluginInfo<SciJavaPlugin> getPlugin(String className)
```
 Description copied from interface: PluginService
 
 Gets the first available plugin of the given class name, or null if none.
 
 Specified by:
 
 getPlugin in interface PluginService
 - getPluginsOfType
```
public <PT extends SciJavaPlugin> List<PluginInfo<PT>> getPluginsOfType(Class<PT> type)
```
 Description copied from interface: PluginService
 
 Gets the list of plugins of the given type (e.g., Service).
 
 Specified by:
 
 getPluginsOfType in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugins to look up; e.g., Service.class.
 - getPluginsOfClass
```
public  List<PluginInfo<SciJavaPlugin>> getPluginsOfClass(Class pluginClass)
```
 Description copied from interface: PluginService
 
 Gets the list of plugins of the given class.
 Most classes will have only a single match, but some special classes (such as ImageJ's LegacyCommand) may match many entries.
 
 Note that this method will result in PluginInfos with matching class names to load their plugin Classes so that they can be compared with the given one.
 
 NB: Classes are matched by strict equality, not assignability; subtypes of the specified class will not match. For this behavior, use PluginService.getPluginsOfType(Class) on a common parent interface.
 
 Specified by:
 
 getPluginsOfClass in interface PluginService
 
 Type Parameters:
 
 P - The class of plugins to look up.
 
 Parameters:
 
 pluginClass - The class for which to obtain the list of matching plugins.
 - getPluginsOfClass
```
public <PT extends SciJavaPlugin,P extends PT> List<PluginInfo<PT>> getPluginsOfClass(Class pluginClass,
 Class<PT> type)
```
 Description copied from interface: PluginService
 
 Gets the list of plugins of the given class.
 Most classes will have only a single match, but some special classes (such as ImageJ's LegacyCommand) may match many entries.
 
 Note that this method will result in PluginInfos with matching class names and types to load their plugin Classes so that they can be compared with the given one.
 
 NB: Classes are matched by strict equality, not assignability; subtypes of the specified class will not match. For this behavior, use PluginService.getPluginsOfType(Class) on a common parent interface.
 
 Specified by:
 
 getPluginsOfClass in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugins to look up; e.g., Service.class.
 
 P - The class of plugins to look up.
 
 Parameters:
 
 pluginClass - The class for which to obtain the list of matching plugins.
 
 type - The type of plugins to which the search should be limited.
 - getPluginsOfClass
```
public List<PluginInfo<SciJavaPlugin>> getPluginsOfClass(String className)
```
 Description copied from interface: PluginService
 
 Gets the list of plugins with the given class name.
 Most classes will have only a single match, but some special classes (such as ImageJ's LegacyCommand) may match many entries.
 
 NB: Classes are matched by strict equality, not assignability; subtypes of the specified class will not match. For this behavior, use PluginService.getPluginsOfType(Class) on a common parent interface.
 
 Specified by:
 
 getPluginsOfClass in interface PluginService
 
 Parameters:
 
 className - The class name for which to obtain the list of matching plugins.
 - getPluginsOfClass
```
public <PT extends SciJavaPlugin> List<PluginInfo<SciJavaPlugin>> getPluginsOfClass(String className,
 Class<PT> type)
```
 Description copied from interface: PluginService
 
 Gets the list of plugins with the given class name.
 Most classes will have only a single match, but some special classes (such as ImageJ's LegacyCommand) may match many entries.
 
 NB: Classes are matched by strict equality, not assignability; subtypes of the specified class will not match. For this behavior, use PluginService.getPluginsOfType(Class) on a common parent interface.
 
 Specified by:
 
 getPluginsOfClass in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugins to look up; e.g., Service.class.
 
 Parameters:
 
 className - The class name for which to obtain the list of matching plugins.
 
 type - The type of plugins to which the search should be limited.
 - createInstancesOfType
```
public <PT extends SciJavaPlugin> List<PT> createInstancesOfType(Class<PT> type)
```
 Description copied from interface: PluginService
 
 Creates one instance each of the available plugins of the given type.
 Note that in the case of commands, this method does not do any preprocessing on the command instances, so parameters will not be auto-populated, initializers will not be executed, etc.
 
 Specified by:
 
 createInstancesOfType in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugins to instantiate; e.g., Service.class.
 - createInstances
```
public <PT extends SciJavaPlugin> List<PT> createInstances(List<PluginInfo<PT>> infos)
```
 Description copied from interface: PluginService
 
 Creates an instance of each of the plugins on the given list.
 If the plugin implements the Contextual interface, the appropriate context is injected. Similarly, if the plugin implements the Prioritized interface, the appropriate priority is injected.
 
 Note that in the case of commands, this method does not do any preprocessing on the command instances, so parameters will not be auto-populated, initializers will not be executed, etc.
 
 Specified by:
 
 createInstances in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugins to instantiate; e.g., Service.class.
 - createInstance
```
public <PT extends SciJavaPlugin> PT createInstance(PluginInfo<PT> info)
```
 Description copied from interface: PluginService
 
 Creates an instance of the given plugin.
 If the plugin implements the Contextual interface, the appropriate context is injected. Similarly, if the plugin implements the Prioritized interface, the appropriate priority is injected.
 
 Note that in the case of commands, this method does not do any preprocessing on the command instances, so parameters will not be auto-populated, initializers will not be executed, etc.
 
 Specified by:
 
 createInstance in interface PluginService
 
 Type Parameters:
 
 PT - The type of plugin to instantiate; e.g., Service.class.
 - 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 Initializable
 
 Specified by:
 
 initialize in interface Service
 - findPluginsOfClass
```
public static <T extends PluginInfo<?>> void findPluginsOfClass(String className,
 List<? extends PluginInfo<?>> srcList,
 List<T> destList)
```
 Transfers plugins of the given class from the source list to the destination list. Note that because this method compares class name strings, it does not need to actually load the class in question.
 
 Parameters:
 
 className - The class name of the desired plugins.
 
 srcList - The list to scan for matching plugins.
 
 destList - The list to which matching plugins are added.
 - getPluginType
```
public static <PT extends SciJavaPlugin,P extends PT> Class<PT> getPluginType(Class pluginClass)
```
 Gets the plugin type of the given plugin class, as declared by its @Plugin annotation (i.e., Plugin.type()).
 
 Parameters:
 
 pluginClass - The plugin class whose plugin type is needed.
 
 Returns:
 
 The plugin type, or null if no Plugin annotation exists for the given class.

Class DefaultPluginService

Constructor Summary

Method Summary

Methods inherited from class org.scijava.service.AbstractService

Methods inherited from class org.scijava.plugin.AbstractRichPlugin

Methods inherited from class org.scijava.AbstractContextual

Methods inherited from class java.lang.Object

Methods inherited from interface org.scijava.plugin.PluginService

Methods inherited from interface org.scijava.service.Service

Methods inherited from interface org.scijava.plugin.RichPlugin

Methods inherited from interface org.scijava.Contextual

Methods inherited from interface org.scijava.Prioritized

Methods inherited from interface org.scijava.plugin.HasPluginInfo

Methods inherited from interface org.scijava.Locatable

Methods inherited from interface org.scijava.Versioned

Methods inherited from interface org.scijava.Disposable

Constructor Detail

DefaultPluginService

Method Detail

getIndex

reloadPlugins

addPlugin

addPlugins

removePlugin

removePlugins

getPlugins

getPlugin

getPlugin

getPlugin

getPluginsOfType

getPluginsOfClass

getPluginsOfClass

getPluginsOfClass

getPluginsOfClass

createInstancesOfType

createInstances

createInstance

initialize

findPluginsOfClass

getPluginType