bundles/org.eclipse.rap.pde.runtime/src/org/eclipse/pde/internal/runtime/PDERuntimePlugin.java

/*******************************************************************************
 *  Copyright (c) 2000, 2013 IBM Corporation and others.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 * 
 *  Contributors:
 *     IBM Corporation                   - initial API and implementation
 *     Arnaud Mergey <a_mergey@yahoo.fr> - RAP port
 *******************************************************************************/
package org.eclipse.pde.internal.runtime;

import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.runtime.*;
import org.eclipse.osgi.service.resolver.PlatformAdmin;
import org.eclipse.osgi.service.resolver.State;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.service.packageadmin.PackageAdmin;
import org.osgi.util.tracker.ServiceTracker;


public class PDERuntimePlugin extends AbstractUIPlugin {

  public static final String ID = "org.eclipse.rap.pde.runtime"; //$NON-NLS-1$
  private static PDERuntimePlugin inst;
  private BundleContext fContext;
  private ServiceTracker packageAdminTracker;
  private ServiceTracker platformAdminTracker;

  public PDERuntimePlugin() {
    inst = this;
  }

  private static boolean isBundleAvailable( String bundleID ) {
    Bundle bundle = Platform.getBundle( bundleID );
    return bundle != null
           && ( bundle.getState() & ( Bundle.ACTIVE | Bundle.STARTING | Bundle.RESOLVED ) ) != 0;
  }

  public static final boolean HAS_IDE_BUNDLES = false;

  // static {
  // boolean result = false;
  // try {
  //			result = isBundleAvailable("org.eclipse.core.resources") //$NON-NLS-1$
  //					&& isBundleAvailable("org.eclipse.pde.core") //$NON-NLS-1$
  //					&& isBundleAvailable("org.eclipse.jdt.core") //$NON-NLS-1$
  //					&& isBundleAvailable("org.eclipse.help") //$NON-NLS-1$
  //					&& isBundleAvailable("org.eclipse.pde.ui") //$NON-NLS-1$
  //					&& isBundleAvailable("org.eclipse.jdt.ui"); //$NON-NLS-1$
  // } catch (Throwable exception) { // do nothing
  // }
  // HAS_IDE_BUNDLES = result;
  // }
  public static IWorkbenchPage getActivePage() {
    return getDefault().internalGetActivePage();
  }

  public static Shell getActiveWorkbenchShell() {
    return getActiveWorkbenchWindow().getShell();
  }

  public static IWorkbenchWindow getActiveWorkbenchWindow() {
    return getDefault().getWorkbench().getActiveWorkbenchWindow();
  }

  public PackageAdmin getPackageAdmin() {
    if( packageAdminTracker == null ) {
      return null;
    }
    return ( PackageAdmin )packageAdminTracker.getService();
  }

  public PlatformAdmin getPlatformAdmin() {
    if( platformAdminTracker == null ) {
      return null;
    }
    return ( PlatformAdmin )platformAdminTracker.getService();
  }

  public static PDERuntimePlugin getDefault() {
    return inst;
  }

  public static String getPluginId() {
    return getDefault().getBundle().getSymbolicName();
  }

  private IWorkbenchPage internalGetActivePage() {
    return getWorkbench().getActiveWorkbenchWindow().getActivePage();
  }

  /*
   * (non-Javadoc)
   * @see org.eclipse.core.runtime.Plugin#start(org.osgi.framework.BundleContext)
   */
  public void start( BundleContext context ) throws Exception {
    super.start( context );
    this.fContext = context;
    packageAdminTracker = new ServiceTracker( context, PackageAdmin.class.getName(), null );
    packageAdminTracker.open();
    platformAdminTracker = new ServiceTracker( context, PlatformAdmin.class.getName(), null );
    platformAdminTracker.open();
  }

  public BundleContext getBundleContext() {
    return this.fContext;
  }

  public State getState() {
    return getPlatformAdmin().getState( false );
  }

  public static void log( Throwable e ) {
    if( e instanceof InvocationTargetException )
      e = ( ( InvocationTargetException )e ).getTargetException();
    IStatus status = null;
    if( e instanceof CoreException ) {
      status = ( ( CoreException )e ).getStatus();
    } else if( e.getMessage() != null ) {
      status = new Status( IStatus.ERROR, ID, IStatus.OK, e.getMessage(), e );
    }
    if( status != null )
      getDefault().getLog().log( status );
  }

  /**
   * This method is called when the plug-in is stopped
   */
  public void stop( BundleContext context ) throws Exception {
    super.stop( context );
    if( packageAdminTracker != null ) {
      packageAdminTracker.close();
      packageAdminTracker = null;
    }
    if( platformAdminTracker != null ) {
      platformAdminTracker.close();
      platformAdminTracker = null;
    }
  }
}