001/* Copyright (C) 2013 TU Dortmund
002 * This file is part of AutomataLib, http://www.automatalib.net/.
003 * 
004 * AutomataLib is free software; you can redistribute it and/or
005 * modify it under the terms of the GNU Lesser General Public
006 * License version 3.0 as published by the Free Software Foundation.
007 * 
008 * AutomataLib is distributed in the hope that it will be useful,
009 * but WITHOUT ANY WARRANTY; without even the implied warranty of
010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
011 * Lesser General Public License for more details.
012 * 
013 * You should have received a copy of the GNU Lesser General Public
014 * License along with AutomataLib; if not, see
015 * http://www.gnu.de/documents/lgpl.en.html.
016 */
017package net.automatalib.commons.util.ref;
018
019import java.lang.ref.WeakReference;
020
021
022/**
023 * A weak reference wrapper, complying to the {@link Ref} interface.
024 * 
025 * @author Malte Isberner <malte.isberner@cs.uni-dortmund.de>
026 *
027 * @param <T> referent class.
028 */
029public final class WeakRef<T> implements Ref<T> {
030        
031        private final WeakReference<T> reference;
032        
033        /**
034         * Constructor.
035         * @param referent the referent.
036         */
037        public WeakRef(T referent) {
038                this.reference = new WeakReference<T>(referent);
039        }
040
041        /*
042         * (non-Javadoc)
043         * @see de.ls5.misc.util.ref.Ref#get()
044         */
045        @Override
046        public T get() {
047                return reference.get();
048        }
049
050}