/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: DESkipListWrapper.java
*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.util.concurrent.datastructures;
import java.util.List;
import com.sun.electric.tool.util.concurrent.utils.ConcurrentCollectionFactory;
/**
* @author Felix Schmidt
*
*/
public class DEListWrapper<T> extends IDEStructure<T> {
private List<T> data = ConcurrentCollectionFactory.createConcurrentList();
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IDEStructure#getFromTop()
*/
@Override
public synchronized T getFromTop() {
if (data.size() > 0) {
return data.remove(0);
}
return null;
}
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IDEStructure#isFull()
*/
@Override
public boolean isFull() {
// TODO Auto-generated method stub
return false;
}
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IDEStructure#tryAdd(java.lang.Object)
*/
@Override
public boolean tryAdd(T item) {
throw new UnsupportedOperationException();
}
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IStructure#add(java.lang.Object)
*/
@Override
public synchronized void add(T item) {
data.add(item);
}
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IStructure#isEmpty()
*/
@Override
public synchronized boolean isEmpty() {
return data.size() == 0;
}
/*
* (non-Javadoc)
*
* @see com.sun.electric.tool.util.IStructure#remove()
*/
@Override
public synchronized T remove() {
if (data.size() > 0) {
return data.remove(data.size() - 1);
}
return null;
}
}