Bootstrap.java :  » IDE-Eclipse » All-Other-packages » org » eclipse » jdi » Java Open Source

/*******************************************************************************
 * Copyright (c) 2000, 2005 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
 *******************************************************************************/
package org.eclipse.jdi;

import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jdt.internal.debug.core.JDIDebugPlugin;


public class Bootstrap
{
  private static com.sun.jdi.VirtualMachineManager fVirtualMachineManager;

  public Bootstrap() { }
  
  public static synchronized com.sun.jdi.VirtualMachineManager virtualMachineManager() {
    if (fVirtualMachineManager != null)
      return fVirtualMachineManager;
    
    try {
      IExtensionRegistry extensionRegistry= Platform.getExtensionRegistry();
      String className= null;
      if (extensionRegistry != null) { // is null if the platform was not started
        className= extensionRegistry.getExtensionPoint(JDIDebugPlugin.getUniqueIdentifier(), "jdiclient").getLabel(); //$NON-NLS-1$
      }
      Class clazz= null;
      if (className != null) {
        clazz= Class.forName(className);
      }
      if (clazz != null) {
        fVirtualMachineManager = (com.sun.jdi.VirtualMachineManager)clazz.newInstance();
      }
    } catch (ClassNotFoundException e) {
    } catch (NoClassDefFoundError e) {
    } catch (InstantiationException e) {
    } catch (IllegalAccessException e) {
    }

    if (fVirtualMachineManager == null) {
      // If any exceptions occurred, we'll end up here
      fVirtualMachineManager= new org.eclipse.jdi.internal.VirtualMachineManagerImpl();
    }
    
    return fVirtualMachineManager;
  }
}