1 /*
2 * Copyright (C) 2008 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package com.google.common.collect.testing;
18
19 import com.google.common.annotations.GwtIncompatible;
20 import java.io.ByteArrayInputStream;
21 import java.io.ByteArrayOutputStream;
22 import java.io.IOException;
23 import java.io.ObjectInputStream;
24 import java.io.ObjectOutputStream;
25 import java.util.Collection;
26 import java.util.List;
27
28 /**
29 * Reserializes the sets created by another test set generator.
30 *
31 * <p>TODO: make CollectionTestSuiteBuilder test reserialized collections
32 *
33 * @author Jesse Wilson
34 */
35 @GwtIncompatible
36 public class ReserializingTestCollectionGenerator<E> implements TestCollectionGenerator<E> {
37 private final TestCollectionGenerator<E> delegate;
38
39 ReserializingTestCollectionGenerator(TestCollectionGenerator<E> delegate) {
40 this.delegate = delegate;
41 }
42
43 public static <E> ReserializingTestCollectionGenerator<E> newInstance(
44 TestCollectionGenerator<E> delegate) {
45 return new ReserializingTestCollectionGenerator<E>(delegate);
46 }
47
48 @Override
49 public Collection<E> create(Object... elements) {
50 return reserialize(delegate.create(elements));
51 }
52
53 @SuppressWarnings("unchecked")
54 static <T> T reserialize(T object) {
55 try {
56 ByteArrayOutputStream bytes = new ByteArrayOutputStream();
57 ObjectOutputStream out = new ObjectOutputStream(bytes);
58 out.writeObject(object);
59 ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes.toByteArray()));
60 return (T) in.readObject();
61 } catch (IOException | ClassNotFoundException e) {
62 Helpers.fail(e, e.getMessage());
63 }
64 throw new AssertionError("not reachable");
65 }
66
67 @Override
68 public SampleElements<E> samples() {
69 return delegate.samples();
70 }
71
72 @Override
73 public E[] createArray(int length) {
74 return delegate.createArray(length);
75 }
76
77 @Override
78 public Iterable<E> order(List<E> insertionOrder) {
79 return delegate.order(insertionOrder);
80 }
81 }