java.util.AbstractSequentialList Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 java.util;
/**
* AbstractSequentialList is an abstract implementation of the List interface.
* This implementation does not support adding. A subclass must implement the
* abstract method listIterator().
*
* @since 1.2
*/
public abstract class AbstractSequentialList extends AbstractList {
/**
* Constructs a new instance of this AbstractSequentialList.
*/
protected AbstractSequentialList() {
}
@Override
public void add(int location, E object) {
listIterator(location).add(object);
}
@Override
public boolean addAll(int location, Collection collection) {
ListIterator it = listIterator(location);
Iterator colIt = collection.iterator();
int next = it.nextIndex();
while (colIt.hasNext()) {
it.add(colIt.next());
}
return next != it.nextIndex();
}
@Override
public E get(int location) {
try {
return listIterator(location).next();
} catch (NoSuchElementException e) {
throw new IndexOutOfBoundsException();
}
}
@Override
public Iterator iterator() {
return listIterator(0);
}
@Override
public abstract ListIterator listIterator(int location);
@Override
public E remove(int location) {
try {
ListIterator it = listIterator(location);
E result = it.next();
it.remove();
return result;
} catch (NoSuchElementException e) {
throw new IndexOutOfBoundsException();
}
}
@Override
public E set(int location, E object) {
ListIterator it = listIterator(location);
if (!it.hasNext()) {
throw new IndexOutOfBoundsException();
}
E result = it.next();
it.set(object);
return result;
}
}