Mercurial > projects > dwt2
diff org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/list/WritableList.d @ 78:0a55d2d5a946
Added file for databinding
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 14 Apr 2009 11:35:29 +0200 |
parents | |
children | 383ce7bd736b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/list/WritableList.d Tue Apr 14 11:35:29 2009 +0200 @@ -0,0 +1,241 @@ +/******************************************************************************* + * 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 + * Brad Reynolds - bug 164653 + * Brad Reynolds - bug 167204 + * Gautam Saggar - bug 169529 + * Brad Reynolds - bug 147515 + * Matthew Hall - bug 208858, 213145 + *******************************************************************************/ +module org.eclipse.core.databinding.observable.list.WritableList; + +import java.lang.all; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Iterator; +import java.util.List; + +import org.eclipse.core.databinding.observable.Diffs; +import org.eclipse.core.databinding.observable.Realm; + +/** + * Mutable observable list backed by an ArrayList. + * + * <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 class WritableList : ObservableList { + + /** + * Creates an empty writable list in the default realm with a + * <code>null</code> element type. + * + */ + public this() { + this(Realm.getDefault()); + } + + /** + * Creates an empty writable list with a <code>null</code> element type. + * + * @param realm + */ + public this(Realm realm) { + this(realm, new ArrayList(), null); + } + + /** + * Constructs a new instance with the default realm. + * + * @param toWrap + * @param elementType + * can be <code>null</code> + */ + public this(List toWrap, Object elementType) { + this(Realm.getDefault(), toWrap, elementType); + } + + /** + * Creates a writable list containing elements of the given type, wrapping + * an existing client-supplied list. + * + * @param realm + * @param toWrap + * The java.utilList to wrap + * @param elementType + * can be <code>null</code> + */ + public this(Realm realm, List toWrap, Object elementType) { + super(realm, toWrap, elementType); + } + + public Object set(int index, Object element) { + checkRealm(); + Object oldElement = wrappedList.set(index, element); + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index, + false, oldElement), Diffs.createListDiffEntry(index, true, + element))); + return oldElement; + } + + /** + * @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); //$NON-NLS-1$ //$NON-NLS-2$ + if (oldIndex is newIndex) + return wrappedList.get(oldIndex); + Object element = wrappedList.remove(oldIndex); + wrappedList.add(newIndex, element); + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(oldIndex, + false, element), Diffs.createListDiffEntry(newIndex, true, + element))); + return element; + } + + public Object remove(int index) { + checkRealm(); + Object oldElement = wrappedList.remove(index); + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index, + false, oldElement))); + return oldElement; + } + + public bool add(Object element) { + checkRealm(); + bool added = wrappedList.add(element); + if (added) { + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry( + wrappedList.size() - 1, true, element))); + } + return added; + } + + public void add(int index, Object element) { + checkRealm(); + wrappedList.add(index, element); + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index, + true, element))); + } + + public bool addAll(Collection c) { + checkRealm(); + ListDiffEntry[] entries = new ListDiffEntry[c.size()]; + int i = 0; + int addIndex = wrappedList.size(); + for (Iterator it = c.iterator(); it.hasNext();) { + Object element = it.next(); + entries[i++] = Diffs.createListDiffEntry(addIndex++, true, element); + } + bool added = wrappedList.addAll(c); + fireListChange(Diffs.createListDiff(entries)); + return added; + } + + public bool addAll(int index, Collection c) { + checkRealm(); + ListDiffEntry[] entries = new ListDiffEntry[c.size()]; + int i = 0; + int addIndex = index; + for (Iterator it = c.iterator(); it.hasNext();) { + Object element = it.next(); + entries[i++] = Diffs.createListDiffEntry(addIndex++, true, element); + } + bool added = wrappedList.addAll(index, c); + fireListChange(Diffs.createListDiff(entries)); + return added; + } + + public bool remove(Object o) { + checkRealm(); + int index = wrappedList.indexOf(o); + if (index is -1) { + return false; + } + wrappedList.remove(index); + fireListChange(Diffs.createListDiff(Diffs.createListDiffEntry(index, + false, o))); + return true; + } + + public bool removeAll(Collection c) { + checkRealm(); + List entries = new ArrayList(); + for (Iterator it = c.iterator(); it.hasNext();) { + Object element = it.next(); + int removeIndex = wrappedList.indexOf(element); + if (removeIndex !is -1) { + wrappedList.remove(removeIndex); + entries.add(Diffs.createListDiffEntry(removeIndex, false, + element)); + } + } + if (entries.size() > 0) + fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries + .toArray(new ListDiffEntry[entries.size()]))); + return entries.size() > 0; + } + + public bool retainAll(Collection c) { + checkRealm(); + List entries = new ArrayList(); + int removeIndex = 0; + for (Iterator it = wrappedList.iterator(); it.hasNext();) { + Object element = it.next(); + if (!c.contains(element)) { + entries.add(Diffs.createListDiffEntry(removeIndex, false, + element)); + it.remove(); + } else { + // only increment if we haven't removed the current element + removeIndex++; + } + } + if (entries.size() > 0) + fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries + .toArray(new ListDiffEntry[entries.size()]))); + return entries.size() > 0; + } + + public void clear() { + checkRealm(); + List entries = new ArrayList(); + for (Iterator it = wrappedList.iterator(); it.hasNext();) { + Object element = it.next(); + // always report 0 as the remove index + entries.add(Diffs.createListDiffEntry(0, false, element)); + it.remove(); + } + fireListChange(Diffs.createListDiff(cast(ListDiffEntry[]) entries + .toArray(new ListDiffEntry[entries.size()]))); + } + + /** + * @param elementType + * can be <code>null</code> + * @return new list with the default realm. + */ + public static WritableList withElementType(Object elementType) { + return new WritableList(Realm.getDefault(), new ArrayList(), + elementType); + } +}