1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.collections.bag;
18
19 import java.util.Set;
20
21 import org.apache.commons.collections.Bag;
22 import org.apache.commons.collections.collection.AbstractCollectionDecorator;
23
24 /**
25 * Decorates another <code>Bag</code> to provide additional behaviour.
26 * <p>
27 * Methods are forwarded directly to the decorated bag.
28 *
29 * @since 3.0
30 * @version $Id: AbstractBagDecorator.java 1429905 2013-01-07 17:15:14Z ggregory $
31 */
32 public abstract class AbstractBagDecorator<E>
33 extends AbstractCollectionDecorator<E> implements Bag<E> {
34
35 /** Serialization version */
36 private static final long serialVersionUID = -3768146017343785417L;
37
38 /**
39 * Constructor only used in deserialization, do not use otherwise.
40 * @since 3.1
41 */
42 protected AbstractBagDecorator() {
43 super();
44 }
45
46 /**
47 * Constructor that wraps (not copies).
48 *
49 * @param bag the bag to decorate, must not be null
50 * @throws IllegalArgumentException if list is null
51 */
52 protected AbstractBagDecorator(final Bag<E> bag) {
53 super(bag);
54 }
55
56 /**
57 * Gets the bag being decorated.
58 *
59 * @return the decorated bag
60 */
61 @Override
62 protected Bag<E> decorated() {
63 return (Bag<E>) super.decorated();
64 }
65
66 //-----------------------------------------------------------------------
67
68 public int getCount(final Object object) {
69 return decorated().getCount(object);
70 }
71
72 public boolean add(final E object, final int count) {
73 return decorated().add(object, count);
74 }
75
76 public boolean remove(final Object object, final int count) {
77 return decorated().remove(object, count);
78 }
79
80 public Set<E> uniqueSet() {
81 return decorated().uniqueSet();
82 }
83
84 }