TypeBound.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 org.jenetics.util.Function;
import org.jenetics.util.StaticObject;
/**
* @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
* @since 1.2
* @version 1.2 — <em>$Date: 2013-09-01 $</em>
*/
public final class TypeBound extends StaticObject {
public static class Extends<A, B> implements Function<A, B> {
private Extends() {
}
@Override
@SuppressWarnings("unchecked")
public B apply(final A value) {
return (B)value;
}
}
public static final class Equals<A, B> extends Extends<A, B> {
private Equals() {
}
}
public static <T> Equals<T, T> Equals() {
return new Equals<>();
}
public static <B, A extends B> Extends<A, B> Extends() {
return new Extends<>();
}
private TypeBound() {}
/*
static interface Seq<T> {
public boolean allTrue(final Equals<T, Boolean> bound);
public int sum(final Extends<T, Number> bound);
}
static void main() {
final Seq<String> strings = null;
final Seq<Boolean> booleans = null;
final Seq<Integer> ints = null;
//strings.allTrue(TypeBound.<Boolean>Equals());
booleans.allTrue(TypeBound.<Boolean>Equals());
ints.sum(TypeBound.<Number, Integer>Extends());
}
*/
}