/*
 * Copyright (C) FuseSource, Inc.
 *   http://fusesource.com
 *
 *   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.fusesource.fabric.utils;

import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;

public class BundleUtils {

    private BundleUtils() {
        //Utility Class
    }

    public static Bundle installOrStopBundle(BundleContext bundleContext, String bsn, String url) throws BundleException {
        Bundle bundle = findBundle(bundleContext, bsn);
        if (bundle == null) {
            bundle = bundleContext.installBundle(url);
        }
        if (bundle.getState() == Bundle.ACTIVE) {
            bundle.stop();
        }
        return bundle;
    }

    public static Bundle findBundle(BundleContext bundleContext, String bsn) throws BundleException {
        for (Bundle b : bundleContext.getBundles()) {
            if (b.getSymbolicName() != null && b.getSymbolicName().equals(bsn)) {
                return b;
            }
        }
        return null;
    }

    public static Bundle findAndStopBundle(BundleContext bundleContext, String bsn) throws BundleException {
        Bundle bundle = findBundle(bundleContext, bsn);
        if (bundle != null && bundle.getState() == Bundle.ACTIVE) {
            bundle.stop();
        }
        return bundle;
    }

    public static Bundle findOrInstallBundle(BundleContext bundleContext, String bsn, String url) throws BundleException {
        Bundle bundle = findBundle(bundleContext, bsn);
        return bundle != null ? bundle : bundleContext.installBundle(url);
    }
}