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/*******************************************************************************
* Copyright (c) 2006, 2015 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.debug.internal.core.commands;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.debug.core.IRequest;
import org.eclipse.debug.core.commands.AbstractDebugCommand;
import org.eclipse.debug.core.commands.IEnabledStateRequest;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IStep;
import org.eclipse.debug.core.model.IThread;
/**
* Common function for step commands.
*
* @since 3.3
*/
public abstract class StepCommand extends AbstractDebugCommand {
@Override
protected void doExecute(Object[] targets, IProgressMonitor monitor, IRequest request) throws CoreException {
for (int i = 0; i < targets.length; i++) {
step(targets[i]);
}
}
protected abstract void step(Object target) throws CoreException ;
@Override
protected boolean isExecutable(Object[] targets, IProgressMonitor monitor, IEnabledStateRequest collector) throws CoreException {
if (isThreadCompatible(targets)) {
for (int i = 0; i < targets.length; i++) {
if (!isSteppable(targets[i])) {
return false;
}
}
return true;
} else {
return false;
}
}
protected abstract boolean isSteppable(Object target) throws CoreException;
protected boolean isThreadCompatible(Object[] targets) {
if (targets.length == 1) {
return true;
}
// check if frames from same thread
Set<IThread> threads = new HashSet<IThread>(targets.length);
for (int i = 0; i < targets.length; i++) {
Object object = targets[i];
IStackFrame frame = null;
if (object instanceof IStackFrame) {
frame = (IStackFrame) object;
} else if (object instanceof IAdaptable) {
frame = ((IAdaptable)object).getAdapter(IStackFrame.class);
}
if (frame != null) {
if (!threads.add(frame.getThread())) {
return false;
}
}
}
return true;
}
@Override
protected Object getTarget(Object element) {
return getAdapter(element, IStep.class);
}
}
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