diff options
Diffstat (limited to 'jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/SortedListValueModelAdapter.java')
-rw-r--r-- | jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/SortedListValueModelAdapter.java | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/SortedListValueModelAdapter.java b/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/SortedListValueModelAdapter.java deleted file mode 100644 index b912b9a207..0000000000 --- a/jpa/plugins/org.eclipse.jpt.utility/src/org/eclipse/jpt/utility/internal/model/value/SortedListValueModelAdapter.java +++ /dev/null @@ -1,133 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2007, 2008 Oracle. 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: - * Oracle - initial API and implementation - ******************************************************************************/ -package org.eclipse.jpt.utility.internal.model.value; - -import java.util.ArrayList; -import java.util.Collections; -import java.util.Comparator; -import java.util.List; - -import org.eclipse.jpt.utility.internal.CollectionTools; -import org.eclipse.jpt.utility.internal.Range; -import org.eclipse.jpt.utility.model.event.CollectionChangeEvent; -import org.eclipse.jpt.utility.model.value.CollectionValueModel; -import org.eclipse.jpt.utility.model.value.ListValueModel; - -/** - * An adapter that allows us to make a <code>CollectionValueModel</code> - * (or <code>ListValueModel</code>) behave like a <code>ListValueModel</code> - * that keeps its contents sorted and notifies listeners appropriately. - * <p> - * The comparator can be changed at any time; allowing the same - * adapter to be used with different sort criteria (e.g. when the user - * wants to sort a list of files first by name, then by date, then by size). - * <p> - * NB: Since we only listen to the wrapped collection when we have - * listeners ourselves and we can only stay in synch with the wrapped - * collection while we are listening to it, results to various methods - * (e.g. <code>#size()</code>, <code>#getItem(int)</code>) will be - * unpredictable whenever - * we do not have any listeners. This should not be too painful since, - * most likely, client objects will also be listeners. - */ -public class SortedListValueModelAdapter<E> - extends CollectionListValueModelAdapter<E> -{ - /** - * A comparator used for sorting the elements; - * if it is null, we use "natural ordering". - */ - protected Comparator<E> comparator; - - - // ********** constructors ********** - - /** - * Wrap the specified collection value model and sort its contents - * using the specified comparator. - */ - public SortedListValueModelAdapter(CollectionValueModel<? extends E> collectionHolder, Comparator<E> comparator) { - super(collectionHolder); - this.comparator = comparator; - } - - /** - * Wrap the specified collection value model and sort its contents - * based on the elements' "natural ordering". - */ - public SortedListValueModelAdapter(CollectionValueModel<? extends E> collectionHolder) { - this(collectionHolder, null); - } - - /** - * Wrap the specified list value model and sort its contents - * using the specified comparator. - */ - public SortedListValueModelAdapter(ListValueModel<? extends E> listHolder, Comparator<E> comparator) { - this(new ListCollectionValueModelAdapter<E>(listHolder), comparator); - } - - /** - * Wrap the specified list value model and sort its contents - * based on the elements' "natural ordering". - */ - public SortedListValueModelAdapter(ListValueModel<? extends E> listHolder) { - this(listHolder, null); - } - - - // ********** accessors ********** - - public void setComparator(Comparator<E> comparator) { - this.comparator = comparator; - this.sortList(); - } - - - // ********** behavior ********** - - /** - * Sort the internal list before - * sending out change notification. - */ - @Override - protected void postBuildList() { - super.postBuildList(); - Collections.sort(this.list, this.comparator); - } - - /** - * the list will need to be sorted after the item is added - */ - @Override - protected void itemsAdded(CollectionChangeEvent event) { - // first add the items and notify our listeners... - super.itemsAdded(event); - // ...then sort the list - this.sortList(); - } - - /** - * sort the list and notify our listeners, if necessary; - */ - protected void sortList() { - // save the unsorted state of the sorted list so we can minimize the number of "replaced" items - @SuppressWarnings("unchecked") - ArrayList<E> unsortedList = (ArrayList<E>) this.list.clone(); - Collections.sort(this.list, this.comparator); - Range diffRange = CollectionTools.identityDiffRange(unsortedList, this.list); - if (diffRange.size > 0) { - List<E> unsortedItems = unsortedList.subList(diffRange.start, diffRange.end + 1); - List<E> sortedItems = this.list.subList(diffRange.start, diffRange.end + 1); - this.fireItemsReplaced(LIST_VALUES, diffRange.start, sortedItems, unsortedItems); - } - } - -} |