Package org.objectstyle.wolips.launching

Source Code of org.objectstyle.wolips.launching.LaunchingPlugin

/*
* ====================================================================
*
* The ObjectStyle Group Software License, Version 1.0
*
* Copyright (c) 2004 -2005 The ObjectStyle Group and individual authors of the
* software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowlegement: "This product includes software
* developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
* this acknowlegement may appear in the software itself, if and wherever such
* third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or
* promote products derived from this software without prior written permission.
* For written permission, please contact andrus@objectstyle.org.
*
* 5. Products derived from this software may not be called "ObjectStyle" nor
* may "ObjectStyle" appear in their names without prior written permission of
* the ObjectStyle Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
* OBJECTSTYLE GROUP OR ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many individuals on
* behalf of the ObjectStyle Group. For more information on the ObjectStyle
* Group, please see <http://objectstyle.org/>.
*/
package org.objectstyle.wolips.launching;

import java.util.ArrayList;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.objectstyle.wolips.baseforuiplugins.AbstractBaseUIActivator;
import org.objectstyle.wolips.jdt.classpath.WOFrameworkClasspathContainer;
import org.objectstyle.wolips.launching.classpath.WORuntimeClasspathEntryResolver;
import org.objectstyle.wolips.launching.exceptionhandler.IExceptionHandler;
import org.objectstyle.wolips.launching.exceptionhandler.internal.ExceptionHandlerWrapper;
import org.osgi.framework.BundleContext;

/**
* The main plugin class to be used in the desktop.
*
* @author uli
* @author markus
*/
public class LaunchingPlugin extends AbstractBaseUIActivator {
  // The shared instance.
  private static LaunchingPlugin plugin;

  public static final String PLUGIN_ID = "org.objectstyle.wolips.launching";

  private ExceptionHandlerWrapper[] exceptionHandlerWrapper;

  private static final String EXTENSION_POINT_ID = "org.objectstyle.wolips.launching.exceptionhandlers";

  /**
   * The constructor.
   */
  public LaunchingPlugin() {
    super();
    plugin = this;
    JavaRuntime.addContainerResolver(new WORuntimeClasspathEntryResolver(), WOFrameworkClasspathContainer.ID);
  }

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

  /**
   * Returns the shared instance.
   */
  public static LaunchingPlugin getDefault() {
    return plugin;
  }

  /**
   * Returns an image descriptor for the image file at the given plug-in
   * relative path.
   *
   * @param path
   *            the path
   * @return the image descriptor
   */
  public static ImageDescriptor getImageDescriptor(String path) {
    return AbstractUIPlugin.imageDescriptorFromPlugin("org.objectstyle.wolips.launching", path);
  }

  /**
   * @return The exceptionHandler defined in the exceptionHandler extension
   *         point
   * @throws CoreException
   */
  private void loadExceptionHandlerExtensionPoint() {
    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(EXTENSION_POINT_ID);
    IExtension[] extensions = extensionPoint.getExtensions();
    ArrayList<ExceptionHandlerWrapper> arrayList = new ArrayList<ExceptionHandlerWrapper>();
    for (int i = 0; i < extensions.length; i++) {
      IConfigurationElement[] configurationElements = extensions[i].getConfigurationElements();
      for (int j = 0; j < configurationElements.length; j++) {
        IConfigurationElement configurationElement = configurationElements[j];
        IExceptionHandler currentBuilder = null;
        try {
          currentBuilder = (IExceptionHandler) configurationElement.createExecutableExtension("class");
          String name = configurationElement.getAttribute("name");
          arrayList.add(new ExceptionHandlerWrapper(currentBuilder, name));
        } catch (CoreException e) {
          this.log("Could not create executable from configuration element: " + configurationElement, e);
        }
      }
    }
    this.exceptionHandlerWrapper = arrayList.toArray(new ExceptionHandlerWrapper[arrayList.size()]);
  }

  public ExceptionHandlerWrapper[] getExceptionHandlerWrapper() {
    if (this.exceptionHandlerWrapper == null) {
      loadExceptionHandlerExtensionPoint();
    }
    return exceptionHandlerWrapper;
  }
}
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