| /******************************************************************************* |
| * Copyright (c) 2005, 2009 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 |
| * Brad Reynolds - bug 147515 |
| * Matthew Hall - bug 221351, 247875, 246782, 249526, 268022, 251424 |
| * Ovidio Mallo - bug 241318 |
| *******************************************************************************/ |
| package org.eclipse.core.internal.databinding.observable.masterdetail; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.DisposeEvent; |
| import org.eclipse.core.databinding.observable.IDisposeListener; |
| import org.eclipse.core.databinding.observable.IObserving; |
| import org.eclipse.core.databinding.observable.ObservableTracker; |
| 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.ObservableList; |
| import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory; |
| 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 DetailObservableList extends ObservableList implements IObserving { |
| |
| private boolean updating = false; |
| |
| private IListChangeListener innerChangeListener = new IListChangeListener() { |
| public void handleListChange(ListChangeEvent event) { |
| if (!updating) { |
| fireListChange(event.diff); |
| } |
| } |
| }; |
| |
| private Object currentOuterValue; |
| |
| private IObservableList innerObservableList; |
| |
| private IObservableFactory factory; |
| |
| private IObservableValue outerObservableValue; |
| |
| private Object detailType; |
| |
| /** |
| * @param factory |
| * @param outerObservableValue |
| * @param detailType |
| */ |
| public DetailObservableList(IObservableFactory factory, |
| IObservableValue outerObservableValue, Object detailType) { |
| super(outerObservableValue.getRealm(), Collections.EMPTY_LIST, |
| detailType); |
| Assert.isTrue(!outerObservableValue.isDisposed(), |
| "Master observable is disposed"); //$NON-NLS-1$ |
| |
| this.factory = factory; |
| this.outerObservableValue = outerObservableValue; |
| this.detailType = detailType; |
| |
| outerObservableValue.addDisposeListener(new IDisposeListener() { |
| public void handleDispose(DisposeEvent staleEvent) { |
| dispose(); |
| } |
| }); |
| |
| ObservableTracker.setIgnore(true); |
| try { |
| updateInnerObservableList(); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| outerObservableValue.addValueChangeListener(outerChangeListener); |
| } |
| |
| IValueChangeListener outerChangeListener = new IValueChangeListener() { |
| public void handleValueChange(ValueChangeEvent event) { |
| ObservableTracker.setIgnore(true); |
| try { |
| List oldList = new ArrayList(wrappedList); |
| updateInnerObservableList(); |
| fireListChange(Diffs.computeListDiff(oldList, wrappedList)); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| }; |
| |
| private void updateInnerObservableList() { |
| if (innerObservableList != null) { |
| innerObservableList.removeListChangeListener(innerChangeListener); |
| innerObservableList.dispose(); |
| } |
| currentOuterValue = outerObservableValue.getValue(); |
| if (currentOuterValue == null) { |
| innerObservableList = null; |
| wrappedList = Collections.EMPTY_LIST; |
| } else { |
| ObservableTracker.setIgnore(true); |
| try { |
| innerObservableList = (IObservableList) factory |
| .createObservable(currentOuterValue); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| DetailObservableHelper.warnIfDifferentRealms(getRealm(), |
| innerObservableList.getRealm()); |
| wrappedList = innerObservableList; |
| |
| if (detailType != null) { |
| Object innerValueType = innerObservableList.getElementType(); |
| Assert.isTrue(getElementType().equals(innerValueType), |
| "Cannot change value type in a nested observable list"); //$NON-NLS-1$ |
| } |
| innerObservableList.addListChangeListener(innerChangeListener); |
| } |
| } |
| |
| public boolean add(final Object o) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.add(o); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public void add(final int index, final Object element) { |
| ObservableTracker.setIgnore(true); |
| try { |
| wrappedList.add(index, element); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public boolean remove(final Object o) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.remove(o); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public Object set(final int index, final Object element) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.set(index, element); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public Object move(final int oldIndex, final int newIndex) { |
| if (innerObservableList != null) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return innerObservableList.move(oldIndex, newIndex); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| return super.move(oldIndex, newIndex); |
| } |
| |
| public Object remove(final int index) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.remove(index); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public boolean addAll(final Collection c) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.addAll(c); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public boolean addAll(final int index, final Collection c) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.addAll(index, c); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public boolean removeAll(final Collection c) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.removeAll(c); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public boolean retainAll(final Collection c) { |
| ObservableTracker.setIgnore(true); |
| try { |
| return wrappedList.retainAll(c); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public void clear() { |
| ObservableTracker.setIgnore(true); |
| try { |
| wrappedList.clear(); |
| } finally { |
| ObservableTracker.setIgnore(false); |
| } |
| } |
| |
| public synchronized void dispose() { |
| super.dispose(); |
| |
| if (outerObservableValue != null) { |
| outerObservableValue.removeValueChangeListener(outerChangeListener); |
| } |
| if (innerObservableList != null) { |
| innerObservableList.removeListChangeListener(innerChangeListener); |
| innerObservableList.dispose(); |
| } |
| outerObservableValue = null; |
| outerChangeListener = null; |
| currentOuterValue = null; |
| factory = null; |
| innerObservableList = null; |
| innerChangeListener = null; |
| } |
| |
| public Object getObserved() { |
| if (innerObservableList instanceof IObserving) { |
| return ((IObserving) innerObservableList).getObserved(); |
| } |
| return null; |
| } |
| } |