/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.osgi.deploy;
  
  import org.argeo.slc.core.deploy.DefaultResourceSet;
  import org.eclipse.gemini.blueprint.context.BundleContextAware;
  import org.eclipse.gemini.blueprint.io.OsgiBundleResourceLoader;
  import org.eclipse.gemini.blueprint.io.OsgiBundleResourcePatternResolver;
  import org.eclipse.gemini.blueprint.util.OsgiBundleUtils;
  import org.osgi.framework.Bundle;
  import org.osgi.framework.BundleContext;
  import org.springframework.core.io.ResourceLoader;
  
  /**
   * Retrieves ressources from an OSGi bundle either the active one or another one
   * referenced by its symbolic name.
   */
  public class OsgiResourceSet extends DefaultResourceSet implements
  		BundleContextAware {
  	private BundleContext bundleContext;
  	private Bundle bundle = null;
  	private String bundleSymbolicName = null;
  
  	private OsgiBundleResourceLoader osgiBundleResourceLoader = null;
  
  	@Override
  	public void afterPropertiesSet() throws Exception {
  		osgiBundleResourceLoader = new OsgiBundleResourceLoader(getBundle());
  		if (getResourcePatternResolver() == null)
  			setResourcePatternResolver(new OsgiBundleResourcePatternResolver(
  					osgiBundleResourceLoader));
  		super.afterPropertiesSet();
  	}
  
  	public Bundle getBundle() {
  		if (bundle != null)
  			return bundle;
  		else if (bundleSymbolicName != null)// do not cache
  			return OsgiBundleUtils.findBundleBySymbolicName(bundleContext,
  					bundleSymbolicName);
  		else
  			// containing bundle
  			return bundleContext.getBundle();
  	}
  
  	public void setBundleContext(BundleContext bundleContext) {
  		this.bundleContext = bundleContext;
  	}
  
  	@Override
  	public ResourceLoader getResourceLoaderToUse() {
  		return osgiBundleResourceLoader;
  	}
  
  	public void setBundle(Bundle bundle) {
  		this.bundle = bundle;
  	}
  
  	public void setBundleSymbolicName(String bundleSymbolicName) {
  		this.bundleSymbolicName = bundleSymbolicName;
  	}
  
  }