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// Stand-alone version of java.util.Collections.synchronizedCollection |
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import java.util.*; |
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import java.io.*; |
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|
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public final class SynchronizedCollection<E> implements Collection<E>, Serializable { |
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// use serialVersionUID from JDK 1.2.2 for interoperability |
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private static final long serialVersionUID = 3053995032091335093L; |
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final Collection<E> c; // Backing Collection |
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final Object mutex; // Object on which to synchronize |
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public SynchronizedCollection(Collection<E> c) { |
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if (c==null) |
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throw new NullPointerException(); |
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this.c = c; |
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mutex = this; |
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} |
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public SynchronizedCollection(Collection<E> c, Object mutex) { |
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this.c = c; |
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this.mutex = mutex; |
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} |
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public SynchronizedCollection() { |
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this(new ArrayList<E>()); |
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} |
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public final int size() { |
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synchronized(mutex) {return c.size();} |
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} |
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public final boolean isEmpty() { |
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synchronized(mutex) {return c.isEmpty();} |
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} |
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public final boolean contains(Object o) { |
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synchronized(mutex) {return c.contains(o);} |
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} |
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public final Object[] toArray() { |
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synchronized(mutex) {return c.toArray();} |
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} |
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public final <T> T[] toArray(T[] a) { |
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synchronized(mutex) {return c.toArray(a);} |
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} |
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public final Iterator<E> iterator() { |
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return c.iterator(); // Must be manually synched by user! |
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} |
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public final boolean add(E e) { |
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synchronized(mutex) {return c.add(e);} |
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} |
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public final boolean remove(Object o) { |
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synchronized(mutex) {return c.remove(o);} |
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} |
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public final boolean containsAll(Collection<?> coll) { |
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synchronized(mutex) {return c.containsAll(coll);} |
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} |
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public final boolean addAll(Collection<? extends E> coll) { |
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synchronized(mutex) {return c.addAll(coll);} |
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} |
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public final boolean removeAll(Collection<?> coll) { |
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synchronized(mutex) {return c.removeAll(coll);} |
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} |
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public final boolean retainAll(Collection<?> coll) { |
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synchronized(mutex) {return c.retainAll(coll);} |
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} |
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public final void clear() { |
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synchronized(mutex) {c.clear();} |
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} |
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public final String toString() { |
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synchronized(mutex) {return c.toString();} |
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} |
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private void writeObject(ObjectOutputStream s) throws IOException { |
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synchronized(mutex) {s.defaultWriteObject();} |
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} |
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} |
