org.glassfish.hk2.osgiresourcelocator.ResourceFinderImpl Maven / Gradle / Ivy

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Used by various API providers that rely on META-INF/services mechanism to locate providers.

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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2015 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package org.glassfish.hk2.osgiresourcelocator;

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

import java.net.URL;
import java.util.ArrayList;
import java.util.List;

/**
 * @author [email protected]
 */
public class ResourceFinderImpl extends ResourceFinder {

    private BundleContext bundleContext;

    public ResourceFinderImpl() {
        ClassLoader cl = getClass().getClassLoader();
        if (cl instanceof BundleReference) {
            bundleContext = BundleReference.class.cast(cl).getBundle().getBundleContext();
        }
        if (bundleContext == null) {
            throw new RuntimeException("There is no bundle context available yet. " +
                    "Instatiate this class in STARTING or ACTIVE state only");
        }
    }

    URL findEntry1(String path) {
        for (Bundle bundle : bundleContext.getBundles()) {
            URL url = bundle.getEntry(path);
            if (url != null) return url;
        }
        return null;
    }

    List findEntries1(String path) {
        List urls = new ArrayList();
        for (Bundle bundle : bundleContext.getBundles()) {
            URL url = bundle.getEntry(path);
            if (url != null) urls.add(url);
        }
        return urls;
    }
}