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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.core;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IDebugTarget;
/**
* Default rule factory returns rules that serialzie access and modification of
* debug elements.
*
* @since 3.1
*/
public class DefaultDebugRuleFactory implements IDebugRuleFactory {
private static IDebugRuleFactory fgDefault;
class PessimisticRule implements ISchedulingRule {
private IDebugElement fElement;
PessimisticRule(IDebugElement element) {
fElement = element;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.jobs.ISchedulingRule#contains(org.eclipse.core.runtime.jobs.ISchedulingRule)
*/
public boolean contains(ISchedulingRule rule) {
if (rule instanceof PessimisticRule) {
return isSameTarget((PessimisticRule) rule, this);
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.core.runtime.jobs.ISchedulingRule#isConflicting(org.eclipse.core.runtime.jobs.ISchedulingRule)
*/
public boolean isConflicting(ISchedulingRule rule) {
if (rule instanceof PessimisticRule) {
return isSameTarget((PessimisticRule) rule, this);
}
return false;
}
private boolean isSameTarget(PessimisticRule a, PessimisticRule b) {
IDebugTarget t1 = a.fElement.getDebugTarget();
IDebugTarget t2 = b.fElement.getDebugTarget();
return t1 != null && t1.equals(t2);
}
}
public static IDebugRuleFactory getDefault() {
if (fgDefault == null) {
fgDefault = new DefaultDebugRuleFactory();
}
return fgDefault;
}
/**
* Constucts a rule factory.
*/
DefaultDebugRuleFactory() {
super();
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.IDebugRuleFactory#accessRule(org.eclipse.debug.core.model.IDebugElement)
*/
public ISchedulingRule accessRule(IDebugElement debugElement) {
return new PessimisticRule(debugElement);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.IDebugRuleFactory#modificationRule(org.eclipse.debug.core.model.IDebugElement)
*/
public ISchedulingRule modificationRule(IDebugElement debugElement) {
return new PessimisticRule(debugElement);
}
}
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