ArrayProxyImpl.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 static java.util.Objects.requireNonNull;
/**
* {@code ArrayProxy} implementation which stores {@code Object}s.
*
* @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
* @since 1.4
* @version 1.5 — <em>$Date: 2013-12-18 $</em>
*/
public final class ArrayProxyImpl<T> extends ArrayProxy<T> {
Object[] _array;
private boolean _sealed = false;
/**
* Create a new array proxy implementation.
*
* @param array the array where the elements are stored.
* @param start the start index of the array proxy, inclusively.
* @param end the end index of the array proxy, exclusively.
*/
public ArrayProxyImpl(final Object[] array, final int start, final int end) {
super(start, end);
_array = requireNonNull(array, "Object array must not be null.");
}
/**
* Create a new array proxy implementation.
*
* @param length the length of the array proxy.
*/
public ArrayProxyImpl(final int length) {
this(new Object[length], 0, length);
}
@SuppressWarnings("unchecked")
@Override
public T __get(final int absoluteIndex) {
return (T)_array[absoluteIndex];
}
@Override
public void __set(final int absoluteIndex, final T value) {
_array[absoluteIndex] = value;
}
@Override
public ArrayProxyImpl<T> slice(final int from, final int until) {
return new ArrayProxyImpl<>(_array, from + _start, until + _start);
}
@Override
public void cloneIfSealed() {
if (_sealed) {
_array = _array.clone();
_sealed = false;
}
}
@Override
public ArrayProxyImpl<T> seal() {
_sealed = true;
return new ArrayProxyImpl<>(_array, _start, _end);
}
@Override
public ArrayProxyImpl<T> copy() {
final ArrayProxyImpl<T> proxy = new ArrayProxyImpl<>(_length);
System.arraycopy(_array, _start, proxy._array, 0, _length);
return proxy;
}
}