| /******************************************************************************* |
| * Copyright (c) 2005-2008 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 |
| * Matthew Hall - bug 221351, 247875, 246782, 249526 |
| * Ovidio Mallo - bug 241318 |
| *******************************************************************************/ |
| package org.eclipse.core.internal.databinding.observable.masterdetail; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.IObserving; |
| import org.eclipse.core.databinding.observable.ObservableTracker; |
| import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
| import org.eclipse.core.databinding.observable.set.IObservableSet; |
| import org.eclipse.core.databinding.observable.set.ISetChangeListener; |
| import org.eclipse.core.databinding.observable.set.ObservableSet; |
| import org.eclipse.core.databinding.observable.set.SetChangeEvent; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.observable.value.IValueChangeListener; |
| import org.eclipse.core.databinding.observable.value.ValueChangeEvent; |
| import org.eclipse.core.runtime.Assert; |
| |
| /** |
| * @since 3.2 |
| * |
| */ |
| public class DetailObservableSet extends ObservableSet implements IObserving { |
| |
| private boolean updating = false; |
| |
| private ISetChangeListener innerChangeListener = new ISetChangeListener() { |
| public void handleSetChange(SetChangeEvent event) { |
| if (!updating) { |
| fireSetChange(event.diff); |
| } |
| } |
| }; |
| |
| private Object currentOuterValue; |
| |
| private IObservableSet innerObservableSet; |
| |
| private IObservableValue outerObservableValue; |
| |
| private IObservableFactory factory; |
| |
| /** |
| * @param factory |
| * @param outerObservableValue |
| * @param detailType |
| */ |
| public DetailObservableSet(IObservableFactory factory, |
| IObservableValue outerObservableValue, Object detailType) { |
| super(outerObservableValue.getRealm(), Collections.EMPTY_SET, |
| detailType); |
| this.factory = factory; |
| this.outerObservableValue = outerObservableValue; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| updateInnerObservableSet(); |
| } |
| }); |
| |
| outerObservableValue.addValueChangeListener(outerChangeListener); |
| } |
| |
| IValueChangeListener outerChangeListener = new IValueChangeListener() { |
| public void handleValueChange(ValueChangeEvent event) { |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| Set oldSet = new HashSet(wrappedSet); |
| updateInnerObservableSet(); |
| fireSetChange(Diffs.computeSetDiff(oldSet, wrappedSet)); |
| } |
| }); |
| } |
| }; |
| |
| private void updateInnerObservableSet() { |
| currentOuterValue = outerObservableValue.getValue(); |
| if (innerObservableSet != null) { |
| innerObservableSet.removeSetChangeListener(innerChangeListener); |
| innerObservableSet.dispose(); |
| } |
| if (currentOuterValue == null) { |
| innerObservableSet = null; |
| wrappedSet = Collections.EMPTY_SET; |
| } else { |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| innerObservableSet = (IObservableSet) factory |
| .createObservable(currentOuterValue); |
| } |
| }); |
| DetailObservableHelper.warnIfDifferentRealms(getRealm(), |
| innerObservableSet.getRealm()); |
| wrappedSet = innerObservableSet; |
| |
| if (elementType != null) { |
| Object innerValueType = innerObservableSet.getElementType(); |
| |
| Assert.isTrue(elementType.equals(innerValueType), |
| "Cannot change value type in a nested observable set"); //$NON-NLS-1$ |
| } |
| |
| innerObservableSet.addSetChangeListener(innerChangeListener); |
| } |
| } |
| |
| public boolean add(final Object o) { |
| getterCalled(); |
| final boolean[] result = new boolean[1]; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| result[0] = wrappedSet.add(o); |
| } |
| }); |
| return result[0]; |
| } |
| |
| public boolean remove(final Object o) { |
| getterCalled(); |
| final boolean[] result = new boolean[1]; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| result[0] = wrappedSet.remove(o); |
| } |
| }); |
| return result[0]; |
| } |
| |
| public boolean addAll(final Collection c) { |
| getterCalled(); |
| final boolean[] result = new boolean[1]; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| result[0] = wrappedSet.addAll(c); |
| } |
| }); |
| return result[0]; |
| } |
| |
| public boolean removeAll(final Collection c) { |
| getterCalled(); |
| final boolean[] result = new boolean[1]; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| result[0] = wrappedSet.removeAll(c); |
| } |
| }); |
| return result[0]; |
| } |
| |
| public boolean retainAll(final Collection c) { |
| getterCalled(); |
| final boolean[] result = new boolean[1]; |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| result[0] = wrappedSet.retainAll(c); |
| } |
| }); |
| return result[0]; |
| } |
| |
| public void clear() { |
| getterCalled(); |
| ObservableTracker.runAndIgnore(new Runnable() { |
| public void run() { |
| wrappedSet.clear(); |
| } |
| }); |
| } |
| |
| public synchronized void dispose() { |
| super.dispose(); |
| |
| if (outerObservableValue != null) { |
| outerObservableValue.removeValueChangeListener(outerChangeListener); |
| } |
| if (innerObservableSet != null) { |
| innerObservableSet.removeSetChangeListener(innerChangeListener); |
| innerObservableSet.dispose(); |
| } |
| outerObservableValue = null; |
| outerChangeListener = null; |
| currentOuterValue = null; |
| factory = null; |
| innerObservableSet = null; |
| innerChangeListener = null; |
| } |
| |
| public Object getObserved() { |
| if (innerObservableSet instanceof IObserving) { |
| return ((IObserving) innerObservableSet).getObserved(); |
| } |
| return null; |
| } |
| |
| } |