| 1 |
|
| 2 |
/* |
| 3 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
| 4 |
* Expert Group and released to the public domain, as explained at |
| 5 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
| 6 |
*/ |
| 7 |
|
| 8 |
// Stand-alone version of java.util.Collections.synchronizedCollection |
| 9 |
import java.util.*; |
| 10 |
import java.io.*; |
| 11 |
|
| 12 |
public final class SynchronizedCollection<E> implements Collection<E>, Serializable { |
| 13 |
final Collection<E> c; // Backing Collection |
| 14 |
final Object mutex; // Object on which to synchronize |
| 15 |
|
| 16 |
public SynchronizedCollection(Collection<E> c) { |
| 17 |
if (c==null) |
| 18 |
throw new NullPointerException(); |
| 19 |
this.c = c; |
| 20 |
mutex = this; |
| 21 |
} |
| 22 |
public SynchronizedCollection(Collection<E> c, Object mutex) { |
| 23 |
this.c = c; |
| 24 |
this.mutex = mutex; |
| 25 |
} |
| 26 |
|
| 27 |
public SynchronizedCollection() { |
| 28 |
this(new ArrayList<E>()); |
| 29 |
} |
| 30 |
|
| 31 |
public final int size() { |
| 32 |
synchronized (mutex) {return c.size();} |
| 33 |
} |
| 34 |
public final boolean isEmpty() { |
| 35 |
synchronized (mutex) {return c.isEmpty();} |
| 36 |
} |
| 37 |
public final boolean contains(Object o) { |
| 38 |
synchronized (mutex) {return c.contains(o);} |
| 39 |
} |
| 40 |
public final Object[] toArray() { |
| 41 |
synchronized (mutex) {return c.toArray();} |
| 42 |
} |
| 43 |
public final <T> T[] toArray(T[] a) { |
| 44 |
synchronized (mutex) {return c.toArray(a);} |
| 45 |
} |
| 46 |
|
| 47 |
public final Iterator<E> iterator() { |
| 48 |
return c.iterator(); |
| 49 |
} |
| 50 |
|
| 51 |
public final boolean add(E e) { |
| 52 |
synchronized (mutex) {return c.add(e);} |
| 53 |
} |
| 54 |
public final boolean remove(Object o) { |
| 55 |
synchronized (mutex) {return c.remove(o);} |
| 56 |
} |
| 57 |
|
| 58 |
public final boolean containsAll(Collection<?> coll) { |
| 59 |
synchronized (mutex) {return c.containsAll(coll);} |
| 60 |
} |
| 61 |
public final boolean addAll(Collection<? extends E> coll) { |
| 62 |
synchronized (mutex) {return c.addAll(coll);} |
| 63 |
} |
| 64 |
public final boolean removeAll(Collection<?> coll) { |
| 65 |
synchronized (mutex) {return c.removeAll(coll);} |
| 66 |
} |
| 67 |
public final boolean retainAll(Collection<?> coll) { |
| 68 |
synchronized (mutex) {return c.retainAll(coll);} |
| 69 |
} |
| 70 |
public final void clear() { |
| 71 |
synchronized (mutex) {c.clear();} |
| 72 |
} |
| 73 |
public final String toString() { |
| 74 |
synchronized (mutex) {return c.toString();} |
| 75 |
} |
| 76 |
private void writeObject(ObjectOutputStream s) throws IOException { |
| 77 |
synchronized (mutex) {s.defaultWriteObject();} |
| 78 |
} |
| 79 |
} |
