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/*******************************************************************************
* Copyright (c) 2006 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.ui.model.elements;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementCompareRequest;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementMementoProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementMementoRequest;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.ui.IMemento;
/**
* @since 3.3
*/
public abstract class ElementMementoProvider implements IElementMementoProvider {
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IElementMementoProvider#compareElements(org.eclipse.debug.internal.ui.viewers.model.provisional.IElementCompareRequest[])
*/
public void compareElements(final IElementCompareRequest[] requests) {
Job job = new Job("compare element") { //$NON-NLS-1$
protected IStatus run(IProgressMonitor monitor) {
for (int i = 0; i < requests.length; i++) {
IElementCompareRequest request = requests[i];
try {
request.setEqual(isEqual(request.getElement(), request.getMemento(), request.getPresentationContext()));
} catch (CoreException e) {
request.setStatus(e.getStatus());
}
request.done();
}
return Status.OK_STATUS;
}
};
job.setSystem(true);
// TODO: rule
job.schedule();
}
/**
* Returns whether the memento represents the given element.
*
* @param element the element to compare to the memento
* @param memento memento
* @param context the context the compare is in
* @return whether the memento represents the given element
*/
protected abstract boolean isEqual(Object element, IMemento memento, IPresentationContext context) throws CoreException;
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.IElementMementoProvider#encodeElements(org.eclipse.debug.internal.ui.viewers.model.provisional.IElementMementoRequest[])
*/
public void encodeElements(final IElementMementoRequest[] requests) {
Job job = new Job("encode element") { //$NON-NLS-1$
protected IStatus run(IProgressMonitor monitor) {
for (int i = 0; i < requests.length; i++) {
IElementMementoRequest request = requests[i];
try {
if (!encodeElement(request.getElement(), request.getMemento(), request.getPresentationContext())) {
request.setCanceled(true);
}
} catch (CoreException e) {
request.setStatus(e.getStatus());
}
request.done();
}
return Status.OK_STATUS;
}
};
job.setSystem(true);
// TODO: rule
job.schedule();
}
/**
* Encodes the specified element into the given memento.
* Returns whether the element could be encoded
*
* @param element the element to encode
* @param memento the memento to write to
* @param context presentation context
* @return false if cancelled/not supported
* @throws CoreException
*/
protected abstract boolean encodeElement(Object element, IMemento memento, IPresentationContext context) throws CoreException;
}
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