/*******************************************************************************
* Copyright (c) 2010, 2014 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Stuart McCulloch (Sonatype, Inc.) - initial API and implementation
*******************************************************************************/
package org.eclipse.sisu.launch;
import org.eclipse.sisu.inject.BindingPublisher;
import org.eclipse.sisu.inject.InjectorPublisher;
import org.eclipse.sisu.inject.MutableBeanLocator;
import org.osgi.framework.Bundle;
import org.osgi.framework.Constants;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;
/**
* {@link BundlePlan} that prepares {@link BindingPublisher}s for JSR330 bundles.
*/
public class SisuBundlePlan
implements BundlePlan
{
// ----------------------------------------------------------------------
// Implementation fields
// ----------------------------------------------------------------------
protected final MutableBeanLocator locator;
// ----------------------------------------------------------------------
// Constructors
// ----------------------------------------------------------------------
public SisuBundlePlan( final MutableBeanLocator locator )
{
this.locator = locator;
}
// ----------------------------------------------------------------------
// Public methods
// ----------------------------------------------------------------------
public BindingPublisher prepare( final Bundle bundle )
{
return appliesTo( bundle ) ? new InjectorPublisher( inject( compose( bundle ) ) ) : null;
}
// ----------------------------------------------------------------------
// Customizable methods
// ----------------------------------------------------------------------
/**
* @return {@code true} if plan applies to the bundle; otherwise {@code false}
*/
protected boolean appliesTo( final Bundle bundle )
{
final String imports = (String) bundle.getHeaders().get( Constants.IMPORT_PACKAGE );
return null != imports && ( imports.contains( "javax.inject" ) || imports.contains( "com.google.inject" ) );
}
/**
* Creates an {@link Injector} from the composed {@link Module} configuration.
*
* @param module The module
* @return Bundle injector
*/
protected Injector inject( final Module module )
{
return Guice.createInjector( module );
}
/**
* Composes a {@link Module} that configures components from the given bundle.
*
* @param bundle The bundle
* @return Bundle module
*/
protected Module compose( final Bundle bundle )
{
return new BundleModule( bundle, locator );
}
}