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/*******************************************************************************
* Copyright (c) 2007, 2008 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.equinox.internal.p2.ui.model;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.jobs.ISchedulingRule;
import org.eclipse.equinox.internal.provisional.p2.ui.query.ElementQueryDescriptor;
import org.eclipse.equinox.internal.provisional.p2.ui.query.QueriedElement;
import org.eclipse.ui.progress.IDeferredWorkbenchAdapter;
import org.eclipse.ui.progress.IElementCollector;
/**
* Element wrapper class for objects that gets their children using
* a deferred query.
*
* @since 3.4
*/
public abstract class RemoteQueriedElement extends QueriedElement implements IDeferredWorkbenchAdapter {
public Object getParent(Object o) {
return null;
}
public void fetchDeferredChildren(Object o, IElementCollector collector, IProgressMonitor monitor) {
collector.add(fetchChildren(o, monitor), monitor);
}
public Object[] getChildren(Object o) {
return fetchChildren(o, null);
}
protected Object[] fetchChildren(Object o, IProgressMonitor monitor) {
if (getQueryProvider() == null)
return new Object[0];
ElementQueryDescriptor queryDescriptor = getQueryProvider().getQueryDescriptor(this, getQueryType());
if (queryDescriptor == null || !queryDescriptor.isComplete())
return new Object[0];
queryDescriptor.queryable.query(queryDescriptor.query, queryDescriptor.collector, monitor);
return queryDescriptor.collector.toArray(Object.class);
}
public ISchedulingRule getRule(Object object) {
return null;
}
public boolean isContainer() {
return true;
}
}
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