| /******************************************************************************* |
| * Copyright (c) 2008, 2010 Matthew Hall 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: |
| * Matthew Hall - initial API and implementation (bug 194734) |
| * Matthew Hall - bug 195222 |
| ******************************************************************************/ |
| |
| package org.eclipse.core.databinding.property.set; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.IObservable; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
| import org.eclipse.core.databinding.observable.masterdetail.MasterDetailObservables; |
| import org.eclipse.core.databinding.observable.set.IObservableSet; |
| import org.eclipse.core.databinding.observable.set.SetDiff; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.core.databinding.property.map.IMapProperty; |
| import org.eclipse.core.databinding.property.value.IValueProperty; |
| import org.eclipse.core.internal.databinding.identity.IdentitySet; |
| import org.eclipse.core.internal.databinding.property.SetPropertyDetailValuesMap; |
| |
| /** |
| * Abstract implementation of ISetProperty |
| * |
| * @since 1.2 |
| */ |
| public abstract class SetProperty implements ISetProperty { |
| /** |
| * @since 1.3 |
| */ |
| public final Set getSet(Object source) { |
| if (source == null) { |
| return Collections.EMPTY_SET; |
| } |
| return Collections.unmodifiableSet(doGetSet(source)); |
| } |
| |
| /** |
| * Returns a Set with the current contents of the source's set property |
| * |
| * @param source |
| * the property source |
| * @return a Set with the current contents of the source's set property |
| * @since 1.3 |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| protected Set doGetSet(Object source) { |
| IObservableSet observable = observe(source); |
| try { |
| return new IdentitySet(observable); |
| } finally { |
| observable.dispose(); |
| } |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| public final void setSet(Object source, Set set) { |
| if (source != null) { |
| doSetSet(source, set); |
| } |
| } |
| |
| /** |
| * Updates the property on the source with the specified change. |
| * |
| * @param source |
| * the property source |
| * @param set |
| * the new set |
| * @since 1.3 |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| protected void doSetSet(Object source, Set set) { |
| doUpdateSet(source, Diffs.computeSetDiff(doGetSet(source), set)); |
| } |
| |
| /** |
| * @since 1.3 |
| */ |
| public final void updateSet(Object source, SetDiff diff) { |
| if (source != null && !diff.isEmpty()) { |
| doUpdateSet(source, diff); |
| } |
| } |
| |
| /** |
| * Updates the property on the source with the specified change. |
| * |
| * @param source |
| * the property source |
| * @param diff |
| * a diff describing the change |
| * @since 1.3 |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| protected void doUpdateSet(Object source, SetDiff diff) { |
| IObservableSet observable = observe(source); |
| try { |
| diff.applyTo(observable); |
| } finally { |
| observable.dispose(); |
| } |
| } |
| |
| public IObservableSet observe(Object source) { |
| return observe(Realm.getDefault(), source); |
| } |
| |
| public IObservableFactory setFactory() { |
| return new IObservableFactory() { |
| public IObservable createObservable(Object target) { |
| return observe(target); |
| } |
| }; |
| } |
| |
| public IObservableFactory setFactory(final Realm realm) { |
| return new IObservableFactory() { |
| public IObservable createObservable(Object target) { |
| return observe(realm, target); |
| } |
| }; |
| } |
| |
| public IObservableSet observeDetail(IObservableValue master) { |
| return MasterDetailObservables.detailSet(master, setFactory(master |
| .getRealm()), getElementType()); |
| } |
| |
| public final IMapProperty values(IValueProperty detailValues) { |
| return new SetPropertyDetailValuesMap(this, detailValues); |
| } |
| } |