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}