01 /*
02 * Java Genetic Algorithm Library (jenetics-1.5.0).
03 * Copyright (c) 2007-2013 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.internal.util;
21
22 import java.util.AbstractCollection;
23 import java.util.Arrays;
24 import java.util.Iterator;
25 import java.util.List;
26
27 import org.jenetics.util.Factory;
28 import org.jenetics.util.StaticObject;
29
30 /**
31 * @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
32 * @since 1.5
33 * @version 1.5 — <em>$Date: 2013-11-18 $</em>
34 */
35 public final class lists extends StaticObject {
36 private lists() {}
37
38 public static <T> void fill(
39 final List<? super T> list,
40 final Factory<? extends T> factory,
41 final int size
42 ) {
43 final Object[] array = arrays.fill(new Object[size], factory);
44
45 // This will tricking the ArrayList.addAll method.
46 list.addAll(new AbstractCollection<T>() {
47 @SuppressWarnings("unchecked")
48 @Override
49 public Iterator<T> iterator() {
50 return Arrays.asList((T[])array).iterator();
51 }
52 @Override
53 public int size() {
54 return array.length;
55 }
56 @Override
57 public Object[] toArray() {
58 return array;
59 }
60 });
61 }
62 }
63
64
65
66
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