package com.planet_ink.coffee_mud.core.collections;
import java.util.ListIterator;
import java.util.concurrent.atomic.AtomicBoolean;
/*
Copyright 2015-2016 Bo Zimmerman
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.
*/
public class SafeFeedbackListIterator<K> implements ListIterator<K>
{
private final ListIterator<K> iter;
private final SafeCollectionHost collection;
private final AtomicBoolean returned = new AtomicBoolean(false);
public SafeFeedbackListIterator(ListIterator<K> iter, SafeCollectionHost collection)
{
this.iter = iter;
this.collection = collection;
this.collection.submitIterator(this);
}
@Override
public void finalize() throws Throwable
{
if(!returned.get())
{
collection.returnIterator(this);
returned.set(true);
}
super.finalize();
}
@Override
public boolean hasNext()
{
return iter.hasNext();
}
@Override
public K next()
{
return iter.next();
}
@Override
public void remove()
{
throw new java.lang.UnsupportedOperationException();
}
@Override
public boolean hasPrevious() {
return iter.hasPrevious();
}
@Override
public K previous() {
return iter.previous();
}
@Override
public int nextIndex() {
return iter.nextIndex();
}
@Override
public int previousIndex() {
return iter.previousIndex();
}
@Override
public void set(K e) {
throw new java.lang.UnsupportedOperationException();
}
@Override
public void add(K e) {
throw new java.lang.UnsupportedOperationException();
}
}
