CoverageLaunchShortcut.java

/*******************************************************************************
 * Copyright (c) 2006, 2016 Mountainminds GmbH & Co. KG and Contributors
 * 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:
 *    Marc R. Hoffmann - initial API and implementation
 *    
 ******************************************************************************/
package com.mountainminds.eclemma.ui.launching;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExecutableExtension;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.Platform;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.debug.ui.ILaunchShortcut;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorPart;

import com.mountainminds.eclemma.core.CoverageTools;
import com.mountainminds.eclemma.internal.ui.EclEmmaUIPlugin;

/**
 * Generic ILaunchShortcut implementation that delegates to another
 * ILaunchShortcut with a given id. The id is specified via the executable
 * extension attribute "class":
 * 
 * <pre>
 *   class="com.mountainminds.eclemma.internal.ui.launching.CoverageLaunchShortcut:org.eclipse.jdt.debug.ui.localJavaShortcut"
 * </pre>
 */
public class CoverageLaunchShortcut implements ILaunchShortcut,
    IExecutableExtension {

  private String delegateId;
  private ILaunchShortcut delegate;

  private ILaunchShortcut getDelegate() {
    if (delegate == null) {
      IExtensionPoint extensionPoint = Platform.getExtensionRegistry()
          .getExtensionPoint(IDebugUIConstants.PLUGIN_ID,
              IDebugUIConstants.EXTENSION_POINT_LAUNCH_SHORTCUTS);
      for (final IConfigurationElement config : extensionPoint
          .getConfigurationElements()) {
        if (delegateId.equals(config.getAttribute("id"))) { //$NON-NLS-1$
          try {
            delegate = (ILaunchShortcut) config
                .createExecutableExtension("class"); //$NON-NLS-1$
          } catch (CoreException e) {
            EclEmmaUIPlugin.log(e);
          }
          break;
        }
      }
      if (delegate == null) {
        String msg = "ILaunchShortcut declaration not found: " + delegateId; //$NON-NLS-1$
        EclEmmaUIPlugin.getInstance().getLog()
            .log(EclEmmaUIPlugin.errorStatus(msg, null));
      }
    }
    return delegate;
  }

  // IExecutableExtension interface:

  public void setInitializationData(IConfigurationElement config,
      String propertyName, Object data) throws CoreException {
    delegateId = String.valueOf(data);
  }

  // ILaunchShortcut interface:

  public void launch(ISelection selection, String mode) {
    ILaunchShortcut delegate = getDelegate();
    if (delegate != null) {
      delegate.launch(selection, CoverageTools.LAUNCH_MODE);
    }
  }

  public void launch(IEditorPart editor, String mode) {
    ILaunchShortcut delegate = getDelegate();
    if (delegate != null) {
      delegate.launch(editor, CoverageTools.LAUNCH_MODE);
    }
  }

}