org.eclipse.gemini.blueprint.extender.support

Class ConditionalApplicationContextCreator

java.lang.Object

org.eclipse.gemini.blueprint.extender.support.ConditionalApplicationContextCreator

All Implemented Interfaces:

OsgiApplicationContextCreator, org.springframework.beans.factory.InitializingBean

public class ConditionalApplicationContextCreator
extends Object
implements OsgiApplicationContextCreator, org.springframework.beans.factory.InitializingBean

Useful OsgiApplicationContextCreator implementation that dictates whether the default application context used by the Spring-DM extender should be created (or not) based on a boolean value. This allows clients to handle only the bundleContext filtering while being decoupled from the context creation process:

 
 ConditionalApplicationContextCreator creator = new ConditionalApplicationContextCreator();
 
 creator.setFilter(new ConditionalApplicationContextCreator.BundleContextFilter() {
        // filter bundles with no copyright
        public boolean matches(BundleContext bundleContext) {
                return bundleContext.getBundle().getHeaders().get(Constants.BUNDLE_COPYRIGHT) != null)
        }
 }
 
 creator.createApplicationContext(bundleContext); 
 

Author:

Costin Leau

See Also:

OsgiApplicationContextCreator

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ConditionalApplicationContextCreator.BundleContextFilter Callback used to filter the bundle contexts for which the default application contexts are created.

Constructor Summary

Constructors

Constructor and Description
ConditionalApplicationContextCreator()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
DelegatedExecutionOsgiBundleApplicationContext	createApplicationContext(org.osgi.framework.BundleContext bundleContext) Creates an application context for the given bundle context.
void	setDelegatedApplicationContextCreator(OsgiApplicationContextCreator delegatedContextCreator) Sets the OsgiApplicationContextCreator used by this context creator for the actual creation.
void	setFilter(ConditionalApplicationContextCreator.BundleContextFilter filter) Sets the ConditionalApplicationContextCreator.BundleContextFilter used by this context creator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConditionalApplicationContextCreator

public ConditionalApplicationContextCreator()

Method Detail

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Throws:

Exception

createApplicationContext

public DelegatedExecutionOsgiBundleApplicationContext createApplicationContext(org.osgi.framework.BundleContext bundleContext)
                                                                        throws Exception

Description copied from interface: OsgiApplicationContextCreator

Creates an application context for the given bundle context. If no application context needs to be created, then null should be returned. Exceptions will be caught and logged but will not prevent the creation of other application contexts.

Specified by:

createApplicationContext in interface OsgiApplicationContextCreator

Parameters:

bundleContext - OSGi bundle context determining the context creation

Returns:

null if no context should be created, non- null otherwise

Throws:

Exception - if something goes wrong

setFilter

public void setFilter(ConditionalApplicationContextCreator.BundleContextFilter filter)

Sets the ConditionalApplicationContextCreator.BundleContextFilter used by this context creator.

Parameters:

filter - The bundle context filter to set.

setDelegatedApplicationContextCreator

public void setDelegatedApplicationContextCreator(OsgiApplicationContextCreator delegatedContextCreator)

Sets the OsgiApplicationContextCreator used by this context creator for the actual creation. If none is specified, DefaultOsgiApplicationContextCreator is used.

Parameters:

delegatedContextCreator - the instance used for creating the application context