40 * This is an incomplete implementation of a wrapper class 41 * that places read-write locks around unsynchronized Maps. 42 * Exists as a sample input for MapLoops test. 43 */ 44 45 public class RWMap implements Map { 46 private final Map m; 47 private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock(); 48 49 public RWMap(Map m) { 50 if (m == null) 51 throw new NullPointerException(); 52 this.m = m; 53 } 54 55 public RWMap() { 56 this(new TreeMap()); // use TreeMap by default 57 } 58 59 public int size() { 60 rwl.readLock().lock(); try {return m.size();} finally { rwl.readLock().unlock(); } 61 } 62 public boolean isEmpty(){ 63 rwl.readLock().lock(); try {return m.isEmpty();} finally { rwl.readLock().unlock(); } 64 } 65 66 public Object get(Object key) { 67 rwl.readLock().lock(); try {return m.get(key);} finally { rwl.readLock().unlock(); } 68 } 69 70 public boolean containsKey(Object key) { 71 rwl.readLock().lock(); try {return m.containsKey(key);} finally { rwl.readLock().unlock(); } 72 } 73 public boolean containsValue(Object value){ 74 rwl.readLock().lock(); try {return m.containsValue(value);} finally { rwl.readLock().unlock(); } 75 } 76 77 78 public Set keySet() { // Not implemented 79 return null; 80 } 81 82 public Set entrySet() { // Not implemented 83 return null; 84 } 85 86 public Collection values() { // Not implemented 87 return null; 88 } 89 90 public boolean equals(Object o) { 91 rwl.readLock().lock(); try {return m.equals(o);} finally { rwl.readLock().unlock(); } 92 } 93 public int hashCode() { 94 rwl.readLock().lock(); try {return m.hashCode();} finally { rwl.readLock().unlock(); } 95 } 96 public String toString() { 97 rwl.readLock().lock(); try {return m.toString();} finally { rwl.readLock().unlock(); } 98 } 99 100 101 102 public Object put(Object key, Object value) { 103 rwl.writeLock().lock(); try {return m.put(key, value);} finally { rwl.writeLock().unlock(); } 104 } 105 public Object remove(Object key) { 106 rwl.writeLock().lock(); try {return m.remove(key);} finally { rwl.writeLock().unlock(); } 107 } 108 public void putAll(Map map) { 109 rwl.writeLock().lock(); try {m.putAll(map);} finally { rwl.writeLock().unlock(); } 110 } 111 public void clear() { 112 rwl.writeLock().lock(); try {m.clear();} finally { rwl.writeLock().unlock(); } 113 } 114 115 } | 40 * This is an incomplete implementation of a wrapper class 41 * that places read-write locks around unsynchronized Maps. 42 * Exists as a sample input for MapLoops test. 43 */ 44 45 public class RWMap implements Map { 46 private final Map m; 47 private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock(); 48 49 public RWMap(Map m) { 50 if (m == null) 51 throw new NullPointerException(); 52 this.m = m; 53 } 54 55 public RWMap() { 56 this(new TreeMap()); // use TreeMap by default 57 } 58 59 public int size() { 60 rwl.readLock().lock(); 61 try { return m.size(); } 62 finally { rwl.readLock().unlock(); } 63 } 64 65 public boolean isEmpty() { 66 rwl.readLock().lock(); 67 try { return m.isEmpty(); } 68 finally { rwl.readLock().unlock(); } 69 } 70 71 public Object get(Object key) { 72 rwl.readLock().lock(); 73 try { return m.get(key); } 74 finally { rwl.readLock().unlock(); } 75 } 76 77 public boolean containsKey(Object key) { 78 rwl.readLock().lock(); 79 try { return m.containsKey(key); } 80 finally { rwl.readLock().unlock(); } 81 } 82 83 public boolean containsValue(Object value) { 84 rwl.readLock().lock(); 85 try { return m.containsValue(value); } 86 finally { rwl.readLock().unlock(); } 87 } 88 89 90 public Set keySet() { // Not implemented 91 return null; 92 } 93 94 public Set entrySet() { // Not implemented 95 return null; 96 } 97 98 public Collection values() { // Not implemented 99 return null; 100 } 101 102 public boolean equals(Object o) { 103 rwl.readLock().lock(); 104 try { return m.equals(o); } 105 finally { rwl.readLock().unlock(); } 106 } 107 108 public int hashCode() { 109 rwl.readLock().lock(); 110 try { return m.hashCode(); } 111 finally { rwl.readLock().unlock(); } 112 } 113 114 public String toString() { 115 rwl.readLock().lock(); 116 try { return m.toString(); } 117 finally { rwl.readLock().unlock(); } 118 } 119 120 public Object put(Object key, Object value) { 121 rwl.writeLock().lock(); 122 try { return m.put(key, value); } 123 finally { rwl.writeLock().unlock(); } 124 } 125 126 public Object remove(Object key) { 127 rwl.writeLock().lock(); 128 try { return m.remove(key); } 129 finally { rwl.writeLock().unlock(); } 130 } 131 132 public void putAll(Map map) { 133 rwl.writeLock().lock(); 134 try { m.putAll(map); } 135 finally { rwl.writeLock().unlock(); } 136 } 137 138 public void clear() { 139 rwl.writeLock().lock(); 140 try { m.clear(); } 141 finally { rwl.writeLock().unlock(); } 142 } 143 144 } |