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/*****************************************************************************
* Copyright (c) 2016 Christian W. Damus and others.
*
* 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:
* Christian W. Damus - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.emf.spi.resolver;
import org.eclipse.papyrus.infra.tools.util.CompositeServiceTracker;
import org.osgi.framework.BundleContext;
/**
* A resolver that delegates to registered OSGi services in a <em>Chain of Command</em>
* pattern to provide the first available service result.
*
* @since 2.0
*/
public class EObjectResolverService implements IEObjectResolver {
private final CompositeServiceTracker<IEObjectResolver> tracker;
/**
* Initializes me with the bundle context in which I track resolver services.
*
* @param context
* the bundle context
*/
public EObjectResolverService(BundleContext context) {
super();
tracker = new CompositeServiceTracker<>(context,
IEObjectResolver.class,
IEObjectResolver.identity(),
IEObjectResolver::compose);
tracker.open();
}
public void dispose() {
tracker.close();
}
@Override
public Object resolve(Object object) {
return tracker.getService().resolve(object);
}
}
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