0N/A/*
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * This file is available under and governed by the GNU General Public
0N/A * License version 2 only, as published by the Free Software Foundation.
0N/A * However, the following notice accompanied the original version of this
0N/A * file:
0N/A *
0N/A * Written by Doug Lea with assistance from members of JCP JSR-166
0N/A * Expert Group and released to the public domain, as explained at
3984N/A * http://creativecommons.org/publicdomain/zero/1.0/
0N/A */
1771N/A
0N/Aimport java.util.*;
0N/Aimport java.util.concurrent.*;
0N/Aimport java.util.concurrent.locks.*;
0N/A
0N/A
0N/A/**
0N/A * This is an incomplete implementation of a wrapper class
0N/A * that places read-write locks around unsynchronized Maps.
0N/A * Exists as a sample input for MapLoops test.
0N/A */
0N/A
0N/Apublic class RWMap implements Map {
0N/A private final Map m;
0N/A private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock();
0N/A
0N/A public RWMap(Map m) {
0N/A if (m == null)
0N/A throw new NullPointerException();
0N/A this.m = m;
0N/A }
0N/A
0N/A public RWMap() {
0N/A this(new TreeMap()); // use TreeMap by default
0N/A }
0N/A
0N/A public int size() {
3203N/A rwl.readLock().lock();
3203N/A try { return m.size(); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
3203N/A
3203N/A public boolean isEmpty() {
3203N/A rwl.readLock().lock();
3203N/A try { return m.isEmpty(); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
0N/A
0N/A public Object get(Object key) {
3203N/A rwl.readLock().lock();
3203N/A try { return m.get(key); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
0N/A
0N/A public boolean containsKey(Object key) {
3203N/A rwl.readLock().lock();
3203N/A try { return m.containsKey(key); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
3203N/A
3203N/A public boolean containsValue(Object value) {
3203N/A rwl.readLock().lock();
3203N/A try { return m.containsValue(value); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
0N/A
0N/A
0N/A public Set keySet() { // Not implemented
0N/A return null;
0N/A }
0N/A
0N/A public Set entrySet() { // Not implemented
0N/A return null;
0N/A }
0N/A
0N/A public Collection values() { // Not implemented
0N/A return null;
0N/A }
0N/A
0N/A public boolean equals(Object o) {
3203N/A rwl.readLock().lock();
3203N/A try { return m.equals(o); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
3203N/A
0N/A public int hashCode() {
3203N/A rwl.readLock().lock();
3203N/A try { return m.hashCode(); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
3203N/A
0N/A public String toString() {
3203N/A rwl.readLock().lock();
3203N/A try { return m.toString(); }
3203N/A finally { rwl.readLock().unlock(); }
0N/A }
0N/A
3203N/A public Object put(Object key, Object value) {
3203N/A rwl.writeLock().lock();
3203N/A try { return m.put(key, value); }
3203N/A finally { rwl.writeLock().unlock(); }
3203N/A }
0N/A
0N/A public Object remove(Object key) {
3203N/A rwl.writeLock().lock();
3203N/A try { return m.remove(key); }
3203N/A finally { rwl.writeLock().unlock(); }
0N/A }
3203N/A
0N/A public void putAll(Map map) {
3203N/A rwl.writeLock().lock();
3203N/A try { m.putAll(map); }
3203N/A finally { rwl.writeLock().unlock(); }
0N/A }
3203N/A
0N/A public void clear() {
3203N/A rwl.writeLock().lock();
3203N/A try { m.clear(); }
3203N/A finally { rwl.writeLock().unlock(); }
0N/A }
0N/A
0N/A}