/*
 * 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.jackrabbit;

import java.util.Collection;
import java.util.Hashtable;
import java.util.Properties;

import javax.jcr.Repository;

import org.argeo.jcr.ArgeoJcrException;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;

/**
 * OSGi-aware Jackrabbit repository factory which can retrieve/publish
 * {@link Repository} as OSGi services.
 */
public class OsgiJackrabbitRepositoryFactory extends JackrabbitRepositoryFactory {
	private BundleContext bundleContext;

	@Override
	protected Repository getRepositoryByAlias(String alias) {
		try {
			Collection<ServiceReference<Repository>> srs = bundleContext.getServiceReferences(Repository.class,
					"(" + JCR_REPOSITORY_ALIAS + "=" + alias + ")");
			if (srs.size() == 0)
				throw new ArgeoJcrException("No repository with alias " + alias + " found in OSGi registry");
			else if (srs.size() > 1)
				throw new ArgeoJcrException(
						srs.size() + " repositories with alias " + alias + " found in OSGi registry");
			return bundleContext.getService(srs.iterator().next());
		} catch (InvalidSyntaxException e) {
			throw new ArgeoJcrException("Cannot find repository with alias " + alias, e);
		}
	}

	protected void publish(String alias, Repository repository, Properties properties) {
		if (bundleContext != null) {
			// do not modify reference
			Hashtable<String, String> props = new Hashtable<String, String>();
			props.putAll(props);
			props.put(JCR_REPOSITORY_ALIAS, alias);
			bundleContext.registerService(Repository.class.getName(), repository, props);
		}
	}

	public void setBundleContext(BundleContext bundleContext) {
		this.bundleContext = bundleContext;
	}

}