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.collections4.set;
18
19 import java.util.Collection;
20 import java.util.List;
21 import java.util.Set;
22
23 /**
24 * This class is used in CompositeSetTest. When testing serialization,
25 * the class has to be separate of CompositeSetTest, else the test
26 * class also has to be serialized.
27 */
28 final class EmptySetMutator<E> implements CompositeSet.SetMutator<E> {
29
30 /** Serialization version */
31 private static final long serialVersionUID = 5321193666420238910L;
32
33 private final Set<E> contained;
34
35 EmptySetMutator(final Set<E> set) {
36 this.contained = set;
37 }
38
39 @Override
40 public boolean add(final CompositeSet<E> composite, final List<Set<E>> collections, final E obj) {
41 return contained.add(obj);
42 }
43
44 @Override
45 public boolean addAll(final CompositeSet<E> composite, final List<Set<E>> collections, final Collection<? extends E> coll) {
46 return contained.addAll(coll);
47 }
48
49 @Override
50 public void resolveCollision(final CompositeSet<E> comp, final Set<E> existing, final Set<E> added, final Collection<E> intersects) {
51 throw new IllegalArgumentException();
52 }
53 }