lists.java
/*
* Java Genetic Algorithm Library (@__identifier__@).
* Copyright (c) @__year__@ Franz Wilhelmstötter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Author:
* Franz Wilhelmstötter (franz.wilhelmstoetter@gmx.at)
*/
package org.jenetics.internal.util;
import java.util.AbstractCollection;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.jenetics.util.Factory;
import org.jenetics.util.StaticObject;
/**
* @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
* @since 1.5
* @version 1.5 — <em>$Date: 2013-11-18 $</em>
*/
public final class lists extends StaticObject {
private lists() {}
public static <T> void fill(
final List<? super T> list,
final Factory<? extends T> factory,
final int size
) {
final Object[] array = arrays.fill(new Object[size], factory);
// This will tricking the ArrayList.addAll method.
list.addAll(new AbstractCollection<T>() {
@SuppressWarnings("unchecked")
@Override
public Iterator<T> iterator() {
return Arrays.asList((T[])array).iterator();
}
@Override
public int size() {
return array.length;
}
@Override
public Object[] toArray() {
return array;
}
});
}
}