public synchronized Object put(Object key, Object value) {
Object old = super.put(key, value);
if (old == null) {
Object[] old_values = _values;
_values = _factory.createTypedArray(old_values.length + 1);
System.arraycopy(old_values, 0, _values, 0, old_values.length);
_values[old_values.length] = value;
} else {
Object[] old_values = _values;
int length = old_values.length;
// XXX:: doing an explicit copy so that the previous snapshots are not messed upon.
_values = _factory.createTypedArray(length);
for (int i = 0; i < length; i++) {
_values[i] = (old == old_values[i] ? value : old_values[i]);
}
}
return old;
}
public synchronized Object remove(Object key) {
Object old = super.remove(key);
if (old != null) {
Object[] old_values = _values;
int length = old_values.length;
_values = _factory.createTypedArray(length - 1);
int i = 0;
boolean found = false;
for (int j = 0; j < length; j++) {
if (found || old != old_values[j]) {
_values[i++] = old_values[j];
} else {
found = true;
}
}
}
return old;
}
public synchronized void clear() {
super.clear();
_values = _factory.createTypedArray(0);
}
public CopyOnWriteArrayMap(int initialCapacity, TypedArrayFactory factory) {
super(initialCapacity);
_factory = factory;
_values = _factory.createTypedArray(0);
}
public CopyOnWriteArrayMap(TypedArrayFactory factory) {
_factory = factory;
_values = _factory.createTypedArray(0);
}