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/*******************************************************************************
* Copyright (c) 2010 BestSolution.at 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:
* Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.databinding.observable.Diffs;
import org.eclipse.core.databinding.observable.list.IListChangeListener;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.ListChangeEvent;
import org.eclipse.core.databinding.observable.list.ListDiff;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.core.databinding.property.list.IListProperty;
public abstract class VirtualEntry<M> {
private int id;
private Object originalParent;
private String label;
private IObservableList list;
public VirtualEntry(int id, IListProperty property, Object originalParent, String label) {
this.id = id;
this.originalParent = originalParent;
this.label = label;
this.list = new WritableList();
IObservableList origList = property.observe(originalParent);
list.addAll(cleanedList(origList));
origList.addListChangeListener(new IListChangeListener() {
public void handleListChange(ListChangeEvent event) {
List<Object> clean = cleanedList(event.getObservableList());
ListDiff diff = Diffs.computeListDiff(VirtualEntry.this.list, clean);
diff.applyTo(VirtualEntry.this.list);
}
});
}
private List<Object> cleanedList(IObservableList list) {
List<Object> l = new ArrayList<Object>(list.size());
for( Object o : list ) {
if( accepted((M) o) ) {
l.add(o);
}
}
return l;
}
protected abstract boolean accepted(M o);
public IObservableList getList() {
return list;
}
public Object getOriginalParent() {
return originalParent;
}
public int getId() {
return id;
}
@Override
public String toString() {
return label;
}
}
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