| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Written by Doug Lea with assistance from members of JCP JSR-166 |
| * Expert Group and released to the public domain, as explained at |
| * http://creativecommons.org/licenses/publicdomain |
| */ |
| |
| import java.util.*; |
| import java.util.concurrent.*; |
| import java.util.concurrent.locks.*; |
| |
| |
| /** |
| * This is an incomplete implementation of a wrapper class |
| * that places read-write locks around unsynchronized Maps. |
| * Exists as a sample input for MapLoops test. |
| */ |
| |
| public class RWMap implements Map { |
| private final Map m; |
| private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock(); |
| |
| public RWMap(Map m) { |
| if (m == null) |
| throw new NullPointerException(); |
| this.m = m; |
| } |
| |
| public RWMap() { |
| this(new TreeMap()); // use TreeMap by default |
| } |
| |
| public int size() { |
| rwl.readLock().lock(); try {return m.size();} finally { rwl.readLock().unlock(); } |
| } |
| public boolean isEmpty(){ |
| rwl.readLock().lock(); try {return m.isEmpty();} finally { rwl.readLock().unlock(); } |
| } |
| |
| public Object get(Object key) { |
| rwl.readLock().lock(); try {return m.get(key);} finally { rwl.readLock().unlock(); } |
| } |
| |
| public boolean containsKey(Object key) { |
| rwl.readLock().lock(); try {return m.containsKey(key);} finally { rwl.readLock().unlock(); } |
| } |
| public boolean containsValue(Object value){ |
| rwl.readLock().lock(); try {return m.containsValue(value);} finally { rwl.readLock().unlock(); } |
| } |
| |
| |
| public Set keySet() { // Not implemented |
| return null; |
| } |
| |
| public Set entrySet() { // Not implemented |
| return null; |
| } |
| |
| public Collection values() { // Not implemented |
| return null; |
| } |
| |
| public boolean equals(Object o) { |
| rwl.readLock().lock(); try {return m.equals(o);} finally { rwl.readLock().unlock(); } |
| } |
| public int hashCode() { |
| rwl.readLock().lock(); try {return m.hashCode();} finally { rwl.readLock().unlock(); } |
| } |
| public String toString() { |
| rwl.readLock().lock(); try {return m.toString();} finally { rwl.readLock().unlock(); } |
| } |
| |
| |
| |
| public Object put(Object key, Object value) { |
| rwl.writeLock().lock(); try {return m.put(key, value);} finally { rwl.writeLock().unlock(); } |
| } |
| public Object remove(Object key) { |
| rwl.writeLock().lock(); try {return m.remove(key);} finally { rwl.writeLock().unlock(); } |
| } |
| public void putAll(Map map) { |
| rwl.writeLock().lock(); try {m.putAll(map);} finally { rwl.writeLock().unlock(); } |
| } |
| public void clear() { |
| rwl.writeLock().lock(); try {m.clear();} finally { rwl.writeLock().unlock(); } |
| } |
| |
| } |