com.google.common.collect.ForwardingList Maven / Gradle / Ivy
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/*
* Copyright (C) 2007 Google Inc.
*
* 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 com.google.common.collect;
import java.util.Collection;
import java.util.List;
import java.util.ListIterator;
/**
* A list which forwards all its method calls to another list. Subclasses should
* override one or more methods to modify the behavior of the backing list as
* desired per the decorator pattern.
*
* This class does not implement {@link java.util.RandomAccess}. If the
* delegate supports random access, the {@code ForwadingList} subclass should
* implement the {@code RandomAccess} interface.
*
* @author Mike Bostock
*/
public abstract class ForwardingList extends ForwardingCollection
implements List {
@Override protected abstract List delegate();
public void add(int index, E element) {
delegate().add(index, element);
}
public boolean addAll(int index, Collection elements) {
return delegate().addAll(index, elements);
}
public E get(int index) {
return delegate().get(index);
}
public int indexOf(Object element) {
return delegate().indexOf(element);
}
public int lastIndexOf(Object element) {
return delegate().lastIndexOf(element);
}
public ListIterator listIterator() {
return delegate().listIterator();
}
public ListIterator listIterator(int index) {
return delegate().listIterator(index);
}
public E remove(int index) {
return delegate().remove(index);
}
public E set(int index, E element) {
return delegate().set(index, element);
}
public List subList(int fromIndex, int toIndex) {
return delegate().subList(fromIndex, toIndex);
}
@Override public boolean equals(Object obj) {
return (this == obj) || delegate().equals(obj);
}
@Override public int hashCode() {
return delegate().hashCode();
}
}