org.scijava.plugin

Class DefaultPluginService

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, HasPluginInfo, PluginService, RichPlugin, SciJavaPlugin, Prioritized, SciJavaService, Service

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()

Method Summary

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

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.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

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 <P extends SciJavaPlugin> PluginInfo<SciJavaPlugin> getPlugin(Class<P> 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<P> 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 <P extends SciJavaPlugin> List<PluginInfo<SciJavaPlugin>> getPluginsOfClass(Class<P> 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<P> 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 Service

Overrides:

initialize in class AbstractService

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<P> 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.