package railo.commons.collection;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Queue;
public class QueueMaxSize<E> implements Queue<E> {
private int maxSize;
private LinkedList<E> list=new LinkedList<E>();
public QueueMaxSize(int maxSize){
this.maxSize=maxSize;
}
@Override
public boolean add(E e) {
if(!list.add(e)) return false;
while (size() > maxSize) { list.remove(); }
return true;
}
public int size() {
return list.size();
}
public boolean contains(Object o) {
return list.contains(o);
}
public Iterator<E> iterator() {
return list.iterator();
}
public <T> T[] toArray(T[] a) {
return list.toArray(a);
}
public boolean remove(Object o) {
return list.remove(o);
}
public void clear() {
list.clear();
}
public E remove() {
return list.remove();
}
public E poll() {
return list.poll();
}
public E element() {
return list.element();
}
public E peek() {
throw new UnsupportedOperationException();
}
@Override
public boolean isEmpty() {
throw new UnsupportedOperationException();
}
@Override
public Object[] toArray() {
throw new UnsupportedOperationException();
}
@Override
public boolean containsAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
@Override
public boolean addAll(Collection<? extends E> c) {
throw new UnsupportedOperationException();
}
@Override
public boolean removeAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
@Override
public boolean retainAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
@Override
public boolean offer(E e) {
throw new UnsupportedOperationException();
}
}