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/*******************************************************************************
* Copyright (c) 2008, 2013 Wind River Systems 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:
* Wind River Systems - initial API and implementation
* IBM Corporation - bug fixing
*******************************************************************************/
package org.eclipse.debug.examples.ui.pda.views;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.debug.examples.core.pda.model.PDAStackFrame;
import org.eclipse.debug.examples.core.pda.model.PDAThread;
import org.eclipse.debug.ui.DebugUITools;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Base class for command handlers for data stack view.
*/
abstract public class AbstractDataStackViewHandler extends AbstractHandler {
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
IWorkbenchPart part = HandlerUtil.getActivePartChecked(event);
if (part instanceof DataStackView) {
DataStackView view = (DataStackView)part;
ISelection selection = DebugUITools.getDebugContextForEventChecked(event);
if (selection instanceof IStructuredSelection) {
Object element = ((IStructuredSelection)selection).getFirstElement();
PDAThread thread = null;
if (element instanceof PDAThread) {
thread = (PDAThread)element;
} else if (element instanceof PDAStackFrame) {
thread = (PDAThread)((PDAStackFrame)element).getThread();
}
if (element != null) {
doExecute(
view,
thread,
HandlerUtil.getCurrentSelectionChecked(event));
}
}
} else {
throw new ExecutionException("Handler must be with DataStackView only"); //$NON-NLS-1$
}
return null;
}
/**
* Performs the actual handler operation.
*
* @param view The view that the handler was invoked in.
* @param target The current active debug target.
* @param selection The current selection in view.
*/
abstract protected void doExecute(DataStackView view, PDAThread target, ISelection selection) throws ExecutionException;
}
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