| /******************************************************************************* |
| * Copyright (c) 2008 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) |
| ******************************************************************************/ |
| |
| package org.eclipse.core.internal.databinding.property.list; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.ConcurrentModificationException; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.ObservableTracker; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.list.AbstractObservableList; |
| import org.eclipse.core.databinding.observable.list.ListDiff; |
| import org.eclipse.core.databinding.observable.list.ListDiffEntry; |
| import org.eclipse.core.databinding.property.INativePropertyListener; |
| import org.eclipse.core.databinding.property.IProperty; |
| import org.eclipse.core.databinding.property.IPropertyObservable; |
| import org.eclipse.core.databinding.property.ISimplePropertyListener; |
| import org.eclipse.core.databinding.property.SimplePropertyEvent; |
| import org.eclipse.core.databinding.property.list.SimpleListProperty; |
| |
| /** |
| * @since 1.2 |
| * |
| */ |
| public class SimpleListPropertyObservableList extends AbstractObservableList |
| implements IPropertyObservable { |
| private Object source; |
| private SimpleListProperty property; |
| |
| private volatile boolean updating = false; |
| |
| private volatile int modCount = 0; |
| |
| private INativePropertyListener listener; |
| |
| private List cachedList; |
| |
| /** |
| * @param realm |
| * @param source |
| * @param property |
| */ |
| public SimpleListPropertyObservableList(Realm realm, Object source, |
| SimpleListProperty property) { |
| super(realm); |
| this.source = source; |
| this.property = property; |
| } |
| |
| protected void firstListenerAdded() { |
| if (!isDisposed()) { |
| cachedList = getList(); |
| |
| if (listener == null) { |
| listener = property |
| .adaptListener(new ISimplePropertyListener() { |
| public void handlePropertyChange( |
| final SimplePropertyEvent event) { |
| modCount++; |
| if (!isDisposed() && !updating) { |
| getRealm().exec(new Runnable() { |
| public void run() { |
| notifyIfChanged((ListDiff) event.diff); |
| } |
| }); |
| } |
| } |
| }); |
| } |
| property.addListener(source, listener); |
| } |
| } |
| |
| protected void lastListenerRemoved() { |
| if (listener != null) { |
| property.removeListener(source, listener); |
| } |
| |
| cachedList = null; |
| } |
| |
| private void getterCalled() { |
| ObservableTracker.getterCalled(this); |
| } |
| |
| public Object getElementType() { |
| return property.getElementType(); |
| } |
| |
| // Queries |
| |
| private List getList() { |
| return property.getList(source); |
| } |
| |
| protected int doGetSize() { |
| return getList().size(); |
| } |
| |
| public boolean contains(Object o) { |
| getterCalled(); |
| return getList().contains(o); |
| } |
| |
| public boolean containsAll(Collection c) { |
| getterCalled(); |
| return getList().containsAll(c); |
| } |
| |
| public Object get(int index) { |
| getterCalled(); |
| return getList().get(index); |
| } |
| |
| public int indexOf(Object o) { |
| getterCalled(); |
| return getList().indexOf(o); |
| } |
| |
| public boolean isEmpty() { |
| getterCalled(); |
| return getList().isEmpty(); |
| } |
| |
| public int lastIndexOf(Object o) { |
| getterCalled(); |
| return getList().lastIndexOf(o); |
| } |
| |
| public Object[] toArray() { |
| getterCalled(); |
| return getList().toArray(); |
| } |
| |
| public Object[] toArray(Object[] a) { |
| getterCalled(); |
| return getList().toArray(a); |
| } |
| |
| // Single change operations |
| |
| public boolean add(Object o) { |
| checkRealm(); |
| add(getList().size(), o); |
| return true; |
| } |
| |
| public void add(int index, Object o) { |
| checkRealm(); |
| boolean wasUpdating = updating; |
| updating = true; |
| List list = new ArrayList(getList()); |
| list.add(index, o); |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry(index, |
| true, o)); |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| } |
| |
| public Iterator iterator() { |
| getterCalled(); |
| return new Iterator() { |
| int expectedModCount = modCount; |
| List list = new ArrayList(getList()); |
| ListIterator iterator = list.listIterator(); |
| |
| Object lastElement = null; |
| int lastIndex = -1; |
| |
| public boolean hasNext() { |
| getterCalled(); |
| checkForComodification(); |
| return iterator.hasNext(); |
| } |
| |
| public Object next() { |
| getterCalled(); |
| checkForComodification(); |
| Object next = lastElement = iterator.next(); |
| lastIndex = iterator.previousIndex(); |
| return next; |
| } |
| |
| public void remove() { |
| checkRealm(); |
| checkForComodification(); |
| if (lastIndex == -1) |
| throw new IllegalStateException(); |
| |
| iterator.remove(); // stay in sync |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry( |
| lastIndex, false, lastElement)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| lastElement = null; |
| lastIndex = -1; |
| |
| expectedModCount = modCount; |
| } |
| |
| private void checkForComodification() { |
| if (expectedModCount != modCount) |
| throw new ConcurrentModificationException(); |
| } |
| }; |
| } |
| |
| public Object move(int oldIndex, int newIndex) { |
| checkRealm(); |
| |
| List list = getList(); |
| int size = list.size(); |
| if (oldIndex < 0 || oldIndex >= size || newIndex < 0 |
| || newIndex >= size) |
| throw new IndexOutOfBoundsException(); |
| |
| if (oldIndex == newIndex) |
| return list.get(oldIndex); |
| |
| list = new ArrayList(list); |
| Object element = list.remove(oldIndex); |
| list.add(newIndex, element); |
| |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry( |
| oldIndex, false, element), Diffs.createListDiffEntry(newIndex, |
| true, element)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return element; |
| } |
| |
| public boolean remove(Object o) { |
| checkRealm(); |
| |
| int index = getList().indexOf(o); |
| if (index == -1) |
| return false; |
| |
| remove(index); |
| |
| return true; |
| } |
| |
| public ListIterator listIterator() { |
| return listIterator(0); |
| } |
| |
| public ListIterator listIterator(final int index) { |
| getterCalled(); |
| return new ListIterator() { |
| int expectedModCount = modCount; |
| List list = new ArrayList(getList()); |
| ListIterator iterator = list.listIterator(index); |
| |
| Object lastElement = null; |
| int lastIndex = -1; |
| |
| public boolean hasNext() { |
| getterCalled(); |
| checkForComodification(); |
| return iterator.hasNext(); |
| } |
| |
| public int nextIndex() { |
| getterCalled(); |
| checkForComodification(); |
| return iterator.nextIndex(); |
| } |
| |
| public Object next() { |
| getterCalled(); |
| checkForComodification(); |
| lastElement = iterator.next(); |
| lastIndex = iterator.previousIndex(); |
| return lastElement; |
| } |
| |
| public boolean hasPrevious() { |
| getterCalled(); |
| checkForComodification(); |
| return iterator.hasPrevious(); |
| } |
| |
| public int previousIndex() { |
| getterCalled(); |
| checkForComodification(); |
| return iterator.previousIndex(); |
| } |
| |
| public Object previous() { |
| getterCalled(); |
| checkForComodification(); |
| lastElement = iterator.previous(); |
| lastIndex = iterator.nextIndex(); |
| return lastElement; |
| } |
| |
| public void add(Object o) { |
| checkRealm(); |
| checkForComodification(); |
| int index = iterator.nextIndex(); |
| |
| iterator.add(o); // keep in sync |
| |
| List list = getList(); |
| list.add(index, o); |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry( |
| index, true, o)); |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| lastElement = null; |
| lastIndex = -1; |
| expectedModCount = modCount; |
| } |
| |
| public void set(Object o) { |
| checkRealm(); |
| checkForComodification(); |
| |
| iterator.set(o); |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry( |
| lastIndex, false, lastElement), Diffs |
| .createListDiffEntry(lastIndex, true, o)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| lastElement = o; |
| expectedModCount = modCount; |
| } |
| |
| public void remove() { |
| checkRealm(); |
| checkForComodification(); |
| if (lastIndex == -1) |
| throw new IllegalStateException(); |
| |
| iterator.remove(); // keep in sync |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry( |
| lastIndex, false, lastElement)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| lastElement = null; |
| lastIndex = -1; |
| expectedModCount = modCount; |
| } |
| |
| private void checkForComodification() { |
| if (expectedModCount != modCount) |
| throw new ConcurrentModificationException(); |
| } |
| }; |
| } |
| |
| public Object remove(int index) { |
| checkRealm(); |
| |
| List list = new ArrayList(getList()); |
| Object element = list.remove(index); |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry(index, |
| false, element)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return element; |
| } |
| |
| public Object set(int index, Object o) { |
| checkRealm(); |
| |
| List list = new ArrayList(getList()); |
| Object oldElement = list.set(index, o); |
| |
| ListDiff diff = Diffs.createListDiff(Diffs.createListDiffEntry(index, |
| false, oldElement), Diffs.createListDiffEntry(index, true, o)); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return oldElement; |
| } |
| |
| public List subList(int fromIndex, int toIndex) { |
| getterCalled(); |
| return Collections.unmodifiableList(getList().subList(fromIndex, |
| toIndex)); |
| } |
| |
| // Bulk change operations |
| |
| public boolean addAll(Collection c) { |
| checkRealm(); |
| |
| return addAll(getList().size(), c); |
| } |
| |
| public boolean addAll(int index, Collection c) { |
| checkRealm(); |
| |
| if (c.isEmpty()) |
| return false; |
| |
| List list = new ArrayList(getList()); |
| list.addAll(index, c); |
| |
| ListDiffEntry[] entries = new ListDiffEntry[c.size()]; |
| int offsetIndex = 0; |
| for (Iterator it = c.iterator(); it.hasNext();) { |
| Object element = it.next(); |
| entries[offsetIndex] = Diffs.createListDiffEntry(index |
| + offsetIndex, true, element); |
| offsetIndex++; |
| } |
| ListDiff diff = Diffs.createListDiff(entries); |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return true; |
| } |
| |
| public boolean removeAll(Collection c) { |
| checkRealm(); |
| |
| if (c.isEmpty()) |
| return false; |
| |
| List list = getList(); |
| if (list.isEmpty()) |
| return false; |
| |
| list = new ArrayList(list); |
| List entries = new ArrayList(); |
| ListDiff diff; |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| for (ListIterator it = list.listIterator(); it.hasNext();) { |
| Object element = it.next(); |
| int index = it.previousIndex(); |
| if (c.contains(element)) { |
| it.remove(); |
| entries.add(Diffs |
| .createListDiffEntry(index, false, element)); |
| } |
| } |
| if (entries.isEmpty()) |
| return false; |
| |
| diff = Diffs.createListDiff((ListDiffEntry[]) entries |
| .toArray(new ListDiffEntry[entries.size()])); |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return !diff.isEmpty(); |
| } |
| |
| public boolean retainAll(Collection c) { |
| checkRealm(); |
| |
| List list = getList(); |
| if (list.isEmpty()) |
| return false; |
| |
| if (c.isEmpty()) { |
| clear(); |
| return true; |
| } |
| |
| list = new ArrayList(list); |
| List entries = new ArrayList(); |
| ListDiff diff; |
| |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| for (ListIterator it = list.listIterator(); it.hasNext();) { |
| Object element = it.next(); |
| int index = it.previousIndex(); |
| if (!c.contains(element)) { |
| it.remove(); |
| entries.add(Diffs |
| .createListDiffEntry(index, false, element)); |
| } |
| } |
| if (entries.isEmpty()) |
| return false; |
| |
| diff = Diffs.createListDiff((ListDiffEntry[]) entries |
| .toArray(new ListDiffEntry[entries.size()])); |
| property.setList(source, list, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| |
| return !diff.isEmpty(); |
| } |
| |
| public void clear() { |
| checkRealm(); |
| |
| List list = getList(); |
| if (list.isEmpty()) |
| return; |
| |
| List entries = new ArrayList(); |
| for (Iterator it = list.iterator(); it.hasNext();) { |
| // always report 0 as the remove index |
| entries.add(Diffs.createListDiffEntry(0, false, it.next())); |
| } |
| |
| ListDiff diff = Diffs.createListDiff((ListDiffEntry[]) entries |
| .toArray(new ListDiffEntry[entries.size()])); |
| boolean wasUpdating = updating; |
| updating = true; |
| try { |
| property.setList(source, Collections.EMPTY_LIST, diff); |
| modCount++; |
| } finally { |
| updating = wasUpdating; |
| } |
| |
| notifyIfChanged(null); |
| } |
| |
| private void notifyIfChanged(ListDiff diff) { |
| if (hasListeners()) { |
| List oldList = cachedList; |
| List newList = cachedList = property.getList(source); |
| if (diff == null) |
| diff = Diffs.computeListDiff(oldList, newList); |
| if (!diff.isEmpty()) { |
| fireListChange(diff); |
| } |
| } |
| } |
| |
| public boolean equals(Object o) { |
| getterCalled(); |
| return getList().equals(o); |
| } |
| |
| public int hashCode() { |
| getterCalled(); |
| return getList().hashCode(); |
| } |
| |
| public Object getObserved() { |
| return source; |
| } |
| |
| public IProperty getProperty() { |
| return property; |
| } |
| |
| public synchronized void dispose() { |
| if (!isDisposed()) { |
| if (listener != null) |
| property.removeListener(source, listener); |
| property = null; |
| source = null; |
| listener = null; |
| } |
| super.dispose(); |
| } |
| } |