| /******************************************************************************* |
| * Copyright (c) 2006, 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 |
| * Brad Reynolds - bug 164653 |
| * Brad Reynolds - bug 167204 |
| * Matthew Hall - bug 208858 |
| * Matthew Hall - bug 208332 |
| *******************************************************************************/ |
| |
| package org.eclipse.core.databinding.observable.list; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.eclipse.core.databinding.observable.AbstractObservable; |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.ObservableTracker; |
| import org.eclipse.core.databinding.observable.Realm; |
| |
| /** |
| * |
| * Abstract implementation of {@link IObservableList}, based on an underlying regular list. |
| * <p> |
| * This class is thread safe. All state accessing methods must be invoked from |
| * the {@link Realm#isCurrent() current realm}. Methods for adding and removing |
| * listeners may be invoked from any thread. |
| * </p> |
| * @since 1.0 |
| * |
| */ |
| public abstract class ObservableList extends AbstractObservable implements |
| IObservableList { |
| |
| protected List wrappedList; |
| |
| /** |
| * Stale state of the list. Access must occur in the current realm. |
| */ |
| private boolean stale = false; |
| |
| private Object elementType; |
| |
| protected ObservableList(List wrappedList, Object elementType) { |
| this(Realm.getDefault(), wrappedList, elementType); |
| } |
| |
| protected ObservableList(Realm realm, List wrappedList, Object elementType) { |
| super(realm); |
| this.wrappedList = wrappedList; |
| this.elementType = elementType; |
| } |
| |
| public synchronized void addListChangeListener(IListChangeListener listener) { |
| addListener(ListChangeEvent.TYPE, listener); |
| } |
| |
| public synchronized void removeListChangeListener(IListChangeListener listener) { |
| removeListener(ListChangeEvent.TYPE, listener); |
| } |
| |
| protected void fireListChange(ListDiff diff) { |
| // fire general change event first |
| super.fireChange(); |
| fireEvent(new ListChangeEvent(this, diff)); |
| } |
| |
| public boolean contains(Object o) { |
| getterCalled(); |
| return wrappedList.contains(o); |
| } |
| |
| public boolean containsAll(Collection c) { |
| getterCalled(); |
| return wrappedList.containsAll(c); |
| } |
| |
| public boolean equals(Object o) { |
| getterCalled(); |
| return wrappedList.equals(o); |
| } |
| |
| public int hashCode() { |
| getterCalled(); |
| return wrappedList.hashCode(); |
| } |
| |
| public boolean isEmpty() { |
| getterCalled(); |
| return wrappedList.isEmpty(); |
| } |
| |
| public Iterator iterator() { |
| getterCalled(); |
| final Iterator wrappedIterator = wrappedList.iterator(); |
| return new Iterator() { |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean hasNext() { |
| return wrappedIterator.hasNext(); |
| } |
| |
| public Object next() { |
| return wrappedIterator.next(); |
| } |
| }; |
| } |
| |
| public int size() { |
| getterCalled(); |
| return wrappedList.size(); |
| } |
| |
| public Object[] toArray() { |
| getterCalled(); |
| return wrappedList.toArray(); |
| } |
| |
| public Object[] toArray(Object[] a) { |
| getterCalled(); |
| return wrappedList.toArray(a); |
| } |
| |
| public String toString() { |
| getterCalled(); |
| return wrappedList.toString(); |
| } |
| |
| /** |
| * @TrackedGetter |
| */ |
| public Object get(int index) { |
| getterCalled(); |
| return wrappedList.get(index); |
| } |
| |
| /** |
| * @TrackedGetter |
| */ |
| public int indexOf(Object o) { |
| getterCalled(); |
| return wrappedList.indexOf(o); |
| } |
| |
| /** |
| * @TrackedGetter |
| */ |
| public int lastIndexOf(Object o) { |
| getterCalled(); |
| return wrappedList.lastIndexOf(o); |
| } |
| |
| // List Iterators |
| |
| /** |
| * @TrackedGetter |
| */ |
| public ListIterator listIterator() { |
| return listIterator(0); |
| } |
| |
| /** |
| * @TrackedGetter |
| */ |
| public ListIterator listIterator(int index) { |
| getterCalled(); |
| final ListIterator wrappedIterator = wrappedList.listIterator(index); |
| return new ListIterator() { |
| |
| public int nextIndex() { |
| return wrappedIterator.nextIndex(); |
| } |
| |
| public int previousIndex() { |
| return wrappedIterator.previousIndex(); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean hasNext() { |
| return wrappedIterator.hasNext(); |
| } |
| |
| public boolean hasPrevious() { |
| return wrappedIterator.hasPrevious(); |
| } |
| |
| public Object next() { |
| return wrappedIterator.next(); |
| } |
| |
| public Object previous() { |
| return wrappedIterator.previous(); |
| } |
| |
| public void add(Object o) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void set(Object o) { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| |
| public List subList(final int fromIndex, final int toIndex) { |
| getterCalled(); |
| if (fromIndex < 0 || fromIndex > toIndex || toIndex > size()) { |
| throw new IndexOutOfBoundsException(); |
| } |
| return new AbstractObservableList(getRealm()) { |
| |
| public Object getElementType() { |
| return ObservableList.this.getElementType(); |
| } |
| |
| public Object get(int location) { |
| return ObservableList.this.get(fromIndex + location); |
| } |
| |
| protected int doGetSize() { |
| return toIndex - fromIndex; |
| } |
| }; |
| } |
| |
| protected void getterCalled() { |
| ObservableTracker.getterCalled(this); |
| } |
| |
| public Object set(int index, Object element) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Moves the element located at <code>oldIndex</code> to |
| * <code>newIndex</code>. This method is equivalent to calling |
| * <code>add(newIndex, remove(oldIndex))</code>. |
| * <p> |
| * Subclasses should override this method to deliver list change |
| * notification for the remove and add operations in the same |
| * ListChangeEvent, as this allows {@link ListDiff#accept(ListDiffVisitor)} |
| * to recognize the operation as a move. |
| * |
| * @param oldIndex |
| * the element's position before the move. Must be within the |
| * range <code>0 <= oldIndex < size()</code>. |
| * @param newIndex |
| * the element's position after the move. Must be within the |
| * range <code>0 <= newIndex < size()</code>. |
| * @return the element that was moved. |
| * @throws IndexOutOfBoundsException |
| * if either argument is out of range (<code>0 <= index < size()</code>). |
| * @see ListDiffVisitor#handleMove(int, int, Object) |
| * @see ListDiff#accept(ListDiffVisitor) |
| * @since 1.1 |
| */ |
| public Object move(int oldIndex, int newIndex) { |
| checkRealm(); |
| int size = wrappedList.size(); |
| if (oldIndex < 0 || oldIndex >= size) |
| throw new IndexOutOfBoundsException( |
| "oldIndex: " + oldIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$ |
| if (newIndex < 0 || newIndex >= size) |
| throw new IndexOutOfBoundsException( |
| "newIndex: " + newIndex + ", size:" + size); //$NON-NLS-1$ //$NON-NLS-2$ |
| Object element = remove(oldIndex); |
| add(newIndex, element); |
| return element; |
| } |
| |
| public Object remove(int index) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean add(Object o) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void add(int index, Object element) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean addAll(Collection c) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean addAll(int index, Collection c) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean remove(Object o) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean removeAll(Collection c) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean retainAll(Collection c) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public void clear() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Returns the stale state. Must be invoked from the current realm. |
| * |
| * @return stale state |
| */ |
| public boolean isStale() { |
| getterCalled(); |
| return stale; |
| } |
| |
| /** |
| * Sets the stale state. Must be invoked from the current realm. |
| * |
| * @param stale |
| * The stale state to list. This will fire a stale event if the |
| * given boolean is true and this observable list was not already |
| * stale. |
| */ |
| public void setStale(boolean stale) { |
| checkRealm(); |
| |
| boolean wasStale = this.stale; |
| this.stale = stale; |
| if (!wasStale && stale) { |
| fireStale(); |
| } |
| } |
| |
| protected void fireChange() { |
| throw new RuntimeException("fireChange should not be called, use fireListChange() instead"); //$NON-NLS-1$ |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.provisional.databinding.observable.AbstractObservable#dispose() |
| */ |
| public synchronized void dispose() { |
| super.dispose(); |
| } |
| |
| public Object getElementType() { |
| return elementType; |
| } |
| |
| protected void updateWrappedList(List newList) { |
| List oldList = wrappedList; |
| ListDiff listDiff = Diffs.computeListDiff(oldList, newList); |
| wrappedList = newList; |
| fireListChange(listDiff); |
| } |
| |
| } |