org.datanucleus.plugin

Class EclipsePluginRegistry

java.lang.Object

org.datanucleus.plugin.EclipsePluginRegistry

All Implemented Interfaces:

PluginRegistry

public class EclipsePluginRegistry
extends Object
implements PluginRegistry

Manages the registry of Extensions and Extension Points.

Constructor Summary

Constructors

Constructor and Description
EclipsePluginRegistry(ClassLoaderResolver clr) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
Object	createExecutableExtension(ConfigurationElement confElm, String name, Class[] argsClass, Object[] args) Loads a class (do not initialize) from an attribute of ConfigurationElement
Bundle[]	getBundles() Accessor for all registered bundles
ExtensionPoint	getExtensionPoint(String id) Acessor for the ExtensionPoint
ExtensionPoint[]	getExtensionPoints() Acessor for the currently registed ExtensionPoints
Class	loadClass(String pluginId, String className) Loads a class (do not initialize)
void	registerExtensionPoints() Register Extension Points
void	registerExtensions() Register ExtensionPoints and Extensions declared in plugin files
void	resolveConstraints() Resolve constraints declared in bundle manifest.mf files.
URL	resolveURLAsFileURL(URL url) Converts a URL that uses a user-defined protocol into a URL that uses the file protocol.

Methods inherited from class java.lang.Object

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

Constructor Detail

EclipsePluginRegistry

public EclipsePluginRegistry(ClassLoaderResolver clr)

Constructor

Parameters:

clr - the ClassLoaderResolver

Method Detail

getExtensionPoint

public ExtensionPoint getExtensionPoint(String id)

Acessor for the ExtensionPoint

Specified by:

getExtensionPoint in interface PluginRegistry

Parameters:

id - the unique id of the extension point

Returns:

null if the ExtensionPoint is not registered

getExtensionPoints

public ExtensionPoint[] getExtensionPoints()

Acessor for the currently registed ExtensionPoints

Specified by:

getExtensionPoints in interface PluginRegistry

Returns:

array of ExtensionPoints

registerExtensionPoints

public void registerExtensionPoints()

Register Extension Points

Specified by:

registerExtensionPoints in interface PluginRegistry

registerExtensions

public void registerExtensions()

Register ExtensionPoints and Extensions declared in plugin files

Specified by:

registerExtensions in interface PluginRegistry

resolveURLAsFileURL

public URL resolveURLAsFileURL(URL url)
                        throws IOException

Converts a URL that uses a user-defined protocol into a URL that uses the file protocol.

Specified by:

resolveURLAsFileURL in interface PluginRegistry

Parameters:

url - the url to be converted

Returns:

the converted URL

Throws:

IOException

createExecutableExtension

public Object createExecutableExtension(ConfigurationElement confElm,
                               String name,
                               Class[] argsClass,
                               Object[] args)
                                 throws ClassNotFoundException,
                                        SecurityException,
                                        NoSuchMethodException,
                                        IllegalArgumentException,
                                        InstantiationException,
                                        IllegalAccessException,
                                        InvocationTargetException

Loads a class (do not initialize) from an attribute of ConfigurationElement

Specified by:

createExecutableExtension in interface PluginRegistry

Parameters:

confElm - the configuration element

name - the attribute name

Returns:

the Class

Throws:

NoSuchMethodException

SecurityException

InvocationTargetException

IllegalAccessException

InstantiationException

IllegalArgumentException

ClassNotFoundException

loadClass

public Class loadClass(String pluginId,
              String className)
                throws ClassNotFoundException

Loads a class (do not initialize)

Specified by:

loadClass in interface PluginRegistry

Parameters:

pluginId - the plugin id

className - the class name

Returns:

the Class

Throws:

ClassNotFoundException

resolveConstraints

public void resolveConstraints()

Resolve constraints declared in bundle manifest.mf files. This must be invoked after registering all bundles. Should log errors if bundles are not resolvable, or raise runtime exceptions.

Specified by:

resolveConstraints in interface PluginRegistry

getBundles

public Bundle[] getBundles()

Accessor for all registered bundles

Specified by:

getBundles in interface PluginRegistry

Returns:

the bundles

Throws:

UnsupportedOperationException - if this operation is not supported by the implementation