| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you under the Apache License, |
| * Version 2.0 (the "License"); you may not use this file except in |
| * compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.pivot.collections; |
| |
| import java.util.Comparator; |
| |
| /** |
| * List listener interface. |
| */ |
| public interface ListListener<T> { |
| /** |
| * List listener adapter. |
| * @deprecated Since 2.1 and Java 8 the interface itself has default implementations. |
| */ |
| @Deprecated |
| public static class Adapter<T> implements ListListener<T> { |
| @Override |
| public void itemInserted(List<T> list, int index) { |
| // empty block |
| } |
| |
| @Override |
| public void itemsRemoved(List<T> list, int index, Sequence<T> items) { |
| // empty block |
| } |
| |
| @Override |
| public void itemUpdated(List<T> list, int index, T previousItem) { |
| // empty block |
| } |
| |
| @Override |
| public void listCleared(List<T> list) { |
| // empty block |
| } |
| |
| @Override |
| public void comparatorChanged(List<T> list, Comparator<T> previousComparator) { |
| // empty block |
| } |
| } |
| |
| /** |
| * Called when an item has been inserted into a list. |
| * |
| * @param list The source of the list event. |
| * @param index The index at which the item was added. |
| */ |
| default void itemInserted(List<T> list, int index) { |
| } |
| |
| /** |
| * Called when items have been removed from a list. |
| * |
| * @param list The source of the list event. |
| * @param index The starting index from which items have been removed. |
| * @param items The items that were removed from the list. |
| */ |
| default void itemsRemoved(List<T> list, int index, Sequence<T> items) { |
| } |
| |
| /** |
| * Called when a list item has been updated. |
| * |
| * @param list The source of the list event. |
| * @param index The index of the item that was updated. |
| * @param previousItem The item that was previously stored at <tt>index</tt>. |
| */ |
| default void itemUpdated(List<T> list, int index, T previousItem) { |
| } |
| |
| /** |
| * Called when list data has been reset. |
| * |
| * @param list The source of the list event. |
| */ |
| default void listCleared(List<T> list) { |
| } |
| |
| /** |
| * Called when a list's comparator has changed. |
| * |
| * @param list The source of the event. |
| * @param previousComparator The previous comparator value. |
| */ |
| default void comparatorChanged(List<T> list, Comparator<T> previousComparator) { |
| } |
| } |