/* * Oscar - An implementation of the OSGi framework. * Copyright (c) 2004, Richard S. Hall * All rights reserved. *   * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: *   *   * Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. *   * Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in *     the documentation and/or other materials provided with the *     distribution. *   * Neither the name of the ungoverned.org nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. *   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * Contact: Richard S. Hall (heavy@ungoverned.org) * Contributor(s): ***/package org.ungoverned.oscar;import org.osgi.framework.Bundle;import org.osgi.service.packageadmin.ExportedPackage;import org.osgi.service.packageadmin.PackageAdmin;class PackageAdminImpl implements PackageAdmin, Runnable{    private Oscar m_oscar = null;    private Bundle[][] m_reqBundles = null;    public PackageAdminImpl(Oscar oscar)    {        m_oscar = oscar;        // Start a thread to perform asynchronous package refreshes.        Thread t = new Thread(this, "OscarPackageAdmin");        t.setDaemon(true);        t.start();    }    /**     * Returns the exported package associated with the specified     * package name.     *     * @param name the name of the exported package to find.     * @return the exported package or null if no matching package was found.    **/    public ExportedPackage getExportedPackage(String name)    {        return m_oscar.getExportedPackage(name);    }    /**     * Returns the packages exported by the specified bundle.     *     * @param bundle the bundle whose exported packages are to be returned.     * @return an array of packages exported by the bundle or null if the     *         bundle does not export any packages.    **/    public ExportedPackage[] getExportedPackages(Bundle b)    {        return m_oscar.getExportedPackages(b);    }    /**     * The OSGi specification states that refreshing packages is     * asynchronous; this method simply notifies the package admin     * thread to do a refresh.     * @param bundles array of bundles to refresh or <tt>null</tt> to refresh     *                any bundles in need of refreshing.    **/    public synchronized void refreshPackages(Bundle[] bundles)        throws SecurityException    {        // Save our request parameters and notify all.        if (m_reqBundles == null)        {            m_reqBundles = new Bundle[][] { bundles };        }        else        {            Bundle[][] newReqBundles = new Bundle[m_reqBundles.length + 1][];            System.arraycopy(m_reqBundles, 0,                newReqBundles, 0, m_reqBundles.length);            newReqBundles[m_reqBundles.length] = bundles;            m_reqBundles = newReqBundles;        }        notifyAll();    }    /**     * The OSGi specification states that package refreshes happen     * asynchronously; this is the run() method for the package     * refreshing thread.    **/    public void run()    {        // This thread loops forever, thus it should        // be a daemon thread.        Bundle[] bundles = null;        while (true)        {            synchronized (this)            {                // Wait for a refresh request.                while (m_reqBundles == null)                {                    try                    {                        wait();                    }                    catch (InterruptedException ex)                    {                    }                }                // Get the bundles parameter for the current                // refresh request.                if (m_reqBundles != null)                {                    bundles = m_reqBundles[0];                }            }            // Perform refresh.            m_oscar.refreshPackages(bundles);            // Remove the first request since it is now completed.            synchronized (this)            {                if (m_reqBundles.length == 1)                {                    m_reqBundles = null;                }                else                {                    Bundle[][] newReqBundles = new Bundle[m_reqBundles.length - 1][];                    System.arraycopy(m_reqBundles, 1,                        newReqBundles, 0, m_reqBundles.length - 1);                    m_reqBundles = newReqBundles;                }            }        }    }}