/*
* 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.util;
import static java.util.Objects.requireNonNull;
import java.io.Serializable;
import java.util.AbstractList;
import java.util.RandomAccess;
/**
* @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
* @version 3.4
* @since 3.4
*/
class SeqList<T>
extends AbstractList<T>
implements
RandomAccess,
Serializable
{
private static final long serialVersionUID = 1L;
public final Seq<T> seq;
SeqList(final Seq<T> seq) {
this.seq = requireNonNull(seq, "Seq must not be null.");
}
@Override
public T get(final int index) {
return seq.get(index);
}
@Override
public int size() {
return seq.length();
}
@Override
public int indexOf(final Object element) {
int index = -1;
if (element == null) {
for (int i = 0; i < seq.length() && index == -1; ++i) {
if (seq.get(i) == null) {
index = i;
}
}
} else {
for (int i = 0; i < seq.length() && index == -1; ++i) {
if (element.equals(seq.get(i))) {
index = i;
}
}
}
return index;
}
@Override
public int lastIndexOf(final Object element) {
int index = -1;
if (element == null) {
for (int i = seq.length(); --i >= 0 && index == -1;) {
if (seq.get(i) == null) {
index = i;
}
}
} else {
for (int i = seq.length(); --i >= 0 && index == -1;) {
if (element.equals(seq.get(i))) {
index = i;
}
}
}
return index;
}
@Override
public boolean contains(final Object element) {
return indexOf(element) != -1;
}
@Override
public Object[] toArray() {
final Object[] array = new Object[size()];
for (int i = size(); --i >= 0;) {
array[i] = this.seq.get(i);
}
return array;
}
@SuppressWarnings("unchecked")
@Override
public <E> E[] toArray(final E[] array) {
if (array.length < size()) {
final E[] copy = (E[])java.lang.reflect.Array.newInstance(
array.getClass().getComponentType(), size()
);
for (int i = size(); --i >= 0;) {
copy[i] = (E) this.seq.get(i);
}
return copy;
}
for (int i = size(); --i >= 0;) {
array[i] = (E) this.seq.get(i);
}
return array;
}
}