// GenericsNote: Converted.
/*
* Copyright 2003-2004 The Apache Software Foundation
*
* 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.
*/
package php.runtime.common.collections.list;
import php.runtime.common.collections.Unmodifiable;
import php.runtime.common.collections.iterators.UnmodifiableIterator;
import php.runtime.common.collections.iterators.UnmodifiableListIterator;
import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
/**
* Decorates another <code>List</code> to ensure it can't be altered.
* <p/>
* This class is Serializable from Commons Collections 3.1.
*
* @author Matt Hall, John Watkinson, Stephen Colebourne
* @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:32 $
* @since Commons Collections 3.0
*/
public final class UnmodifiableList <E> extends AbstractListDecorator<E> implements Unmodifiable, Serializable {
/**
* Serialization version
*/
private static final long serialVersionUID = 6595182819922443652L;
/**
* Factory method to create an unmodifiable list.
*
* @param list the list to decorate, must not be null
* @throws IllegalArgumentException if list is null
*/
public static <E> List<E> decorate(List<E> list) {
if (list instanceof Unmodifiable) {
return list;
}
return new UnmodifiableList<E>(list);
}
//-----------------------------------------------------------------------
/**
* Constructor that wraps (not copies).
*
* @param list the list to decorate, must not be null
* @throws IllegalArgumentException if list is null
*/
private UnmodifiableList(List<E> list) {
super(list);
}
//-----------------------------------------------------------------------
public Iterator<E> iterator() {
return UnmodifiableIterator.decorate(getCollection().iterator());
}
public boolean add(E object) {
throw new UnsupportedOperationException();
}
public boolean addAll(Collection<? extends E> coll) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean remove(Object object) {
throw new UnsupportedOperationException();
}
public boolean removeAll(Collection<?> coll) {
throw new UnsupportedOperationException();
}
public boolean retainAll(Collection<?> coll) {
throw new UnsupportedOperationException();
}
//-----------------------------------------------------------------------
public ListIterator<E> listIterator() {
return UnmodifiableListIterator.decorate(getList().listIterator());
}
public ListIterator<E> listIterator(int index) {
return UnmodifiableListIterator.decorate(getList().listIterator(index));
}
public void add(int index, E object) {
throw new UnsupportedOperationException();
}
public boolean addAll(int index, Collection<? extends E> coll) {
throw new UnsupportedOperationException();
}
public E remove(int index) {
throw new UnsupportedOperationException();
}
public E set(int index, E object) {
throw new UnsupportedOperationException();
}
public List<E> subList(int fromIndex, int toIndex) {
List<E> sub = getList().subList(fromIndex, toIndex);
return new UnmodifiableList<E>(sub);
}
}