/* * 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 java.security.AccessController;import java.util.ArrayList;import java.util.List;import org.osgi.framework.AdminPermission;import org.osgi.framework.Bundle;import org.osgi.service.startlevel.StartLevel;/** * @author rickhall * * To change the template for this generated type comment go to * Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments**/public class StartLevelImpl implements StartLevel, Runnable{    private Oscar m_oscar = null;    private List m_requestList = null;    // Reusable admin permission.    private static AdminPermission m_adminPerm = new AdminPermission();        public StartLevelImpl(Oscar oscar)    {        m_oscar = oscar;        m_requestList = new ArrayList();        // Start a thread to perform asynchronous package refreshes.        Thread t = new Thread(this, "OscarStartLevel");        t.setDaemon(true);        t.start();    }        /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#getStartLevel()    **/    public int getStartLevel()    {        return m_oscar.getStartLevel();    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#setStartLevel(int)    **/    public void setStartLevel(int startlevel)    {        if (System.getSecurityManager() != null)        {            AccessController.checkPermission(m_adminPerm);        }        else if (startlevel <= 0)        {            throw new IllegalArgumentException(                "Start level must be greater than zero.");        }        synchronized (m_requestList)        {            m_requestList.add(new Integer(startlevel));            m_requestList.notifyAll();        }    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#getBundleStartLevel(org.osgi.framework.Bundle)    **/    public int getBundleStartLevel(Bundle bundle)    {        return m_oscar.getBundleStartLevel(bundle);    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#setBundleStartLevel(org.osgi.framework.Bundle, int)    **/    public void setBundleStartLevel(Bundle bundle, int startlevel)    {        m_oscar.setBundleStartLevel(bundle, startlevel);    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#getInitialBundleStartLevel()    **/    public int getInitialBundleStartLevel()    {        return m_oscar.getInitialBundleStartLevel();    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#setInitialBundleStartLevel(int)    **/    public void setInitialBundleStartLevel(int startlevel)    {        m_oscar.setInitialBundleStartLevel(startlevel);    }    /* (non-Javadoc)     * @see org.osgi.service.startlevel.StartLevel#isBundlePersistentlyStarted(org.osgi.framework.Bundle)    **/    public boolean isBundlePersistentlyStarted(Bundle bundle)    {        return m_oscar.isBundlePersistentlyStarted(bundle);    }    public void run()    {        int startLevel = 0;        // This thread loops forever, thus it should        // be a daemon thread.        while (true)        {            synchronized (m_requestList)            {                // Wait for a request.                while (m_requestList.size() == 0)                {                    try {                        m_requestList.wait();                    } catch (InterruptedException ex) {                    }                }                                // Get the requested start level.                startLevel = ((Integer) m_requestList.remove(0)).intValue();            }            // Set the new start level.            m_oscar.setStartLevelInternal(startLevel);        }    }}