/*
* Javolution - Java(TM) Solution for Real-Time and Embedded Systems
* Copyright (C) 2012 - Javolution (http://javolution.org/)
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software is
* freely granted, provided that this notice is preserved.
*/
package javolution.util.internal.set.sorted;
import javolution.util.internal.ReadWriteLockImpl;
import javolution.util.internal.set.SharedSetImpl;
import javolution.util.service.SetService;
import javolution.util.service.SortedSetService;
/**
* A shared view over a set allowing concurrent access and sequential updates.
*/
public class SharedSortedSetImpl<E> extends SharedSetImpl<E> implements
SortedSetService<E> {
private static final long serialVersionUID = 0x600L; // Version.
public SharedSortedSetImpl(SetService<E> target) {
super(target);
}
public SharedSortedSetImpl(SortedSetService<E> target, ReadWriteLockImpl lock) {
super(target, lock);
}
@Override
public E first() {
lock.readLock.lock();
try {
return target().first();
} finally {
lock.readLock.unlock();
}
}
@Override
public SortedSetService<E> headSet(E toElement) {
return new SubSortedSetImpl<E>(this, null, toElement);
}
@Override
public E last() {
lock.readLock.lock();
try {
return target().last();
} finally {
lock.readLock.unlock();
}
}
@SuppressWarnings("unchecked")
@Override
public SortedSetService<E>[] split(int n, boolean updateable) {
SortedSetService<E>[] tmp;
lock.readLock.lock();
try {
tmp = target().split(n, updateable);
} finally {
lock.readLock.unlock();
}
SortedSetService<E>[] result = new SortedSetService[tmp.length];
for (int i = 0; i < tmp.length; i++) {
result[i] = new SharedSortedSetImpl<E>(tmp[i], lock); // Shares the same locks.
}
return result;
}
@Override
public SortedSetService<E> subSet(E fromElement, E toElement) {
return new SubSortedSetImpl<E>(this, fromElement, toElement);
}
@Override
public SortedSetService<E> tailSet(E fromElement) {
return new SubSortedSetImpl<E>(this, fromElement, null);
}
@Override
protected SortedSetService<E> target() {
return (SortedSetService<E>) super.target();
}
}