01 /*
02 * Java Genetic Algorithm Library (jenetics-1.6.0).
03 * Copyright (c) 2007-2014 Franz Wilhelmstötter
04 *
05 * Licensed under the Apache License, Version 2.0 (the "License");
06 * you may not use this file except in compliance with the License.
07 * You may obtain a copy of the License at
08 *
09 * 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 * Author:
18 * Franz Wilhelmstötter (franz.wilhelmstoetter@gmx.at)
19 */
20 package org.jenetics.util;
21
22 /**
23 * @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
24 * @since 1.0
25 * @version 1.3 — <em>$Date: 2013-08-30 $</em>
26 */
27 final class ArrayRef implements Cloneable {
28 Object[] data;
29 final int length;
30
31 private boolean _sealed = false;
32
33 ArrayRef(final Object[] data) {
34 this.data = data;
35 length = data.length;
36 }
37
38 ArrayRef(final int length) {
39 data = new Object[length];
40 this.length = length;
41 }
42
43 final void cloneIfSealed() {
44 if (_sealed) {
45 data = data.clone();
46 _sealed = false;
47 }
48 }
49
50 final ArrayRef seal() {
51 _sealed = true;
52 return this;
53 }
54
55 }
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