package speiger.src.collections.PACKAGE.utils;

#if TYPE_OBJECT
import java.util.Comparator;
#endif

import speiger.src.collections.PACKAGE.collections.ITERATOR;
#if !TYPE_OBJECT
import speiger.src.collections.PACKAGE.functions.COMPARATOR;
#endif
import speiger.src.collections.PACKAGE.queues.PRIORITY_DEQUEUE;
import speiger.src.collections.PACKAGE.queues.PRIORITY_QUEUE;

/**
 * A Helper class for PriorityQueues
 */
public class PRIORITY_QUEUES
{
	
	/**
	 * Returns a synchronized PriorityQueue instance based on the instance given.
	 * @param queue that should be synchronized
	 * @Type(T)
	 * @return a synchronized PriorityQueue wrapper.
	 */
	public static GENERIC_KEY_BRACES PRIORITY_QUEUE KEY_GENERIC_TYPE synchronize(PRIORITY_QUEUE KEY_GENERIC_TYPE queue) {
		return queue instanceof SynchronizedPriorityQueue ? (SynchronizedPriorityQueue KEY_GENERIC_TYPE)queue : new SynchronizedPriorityQueueBRACES(queue);
	}
	
	/**
	 * Returns a synchronized PriorityQueue instance based on the instance given.
	 * @param queue that should be synchronized
	 * @param mutex is the controller of the synchronization block.
	 * @Type(T)
	 * @return a synchronized PriorityQueue wrapper.
	 */
	public static GENERIC_KEY_BRACES PRIORITY_QUEUE KEY_GENERIC_TYPE synchronize(PRIORITY_QUEUE KEY_GENERIC_TYPE queue, Object mutex) {
		return queue instanceof SynchronizedPriorityQueue ? (SynchronizedPriorityQueue KEY_GENERIC_TYPE)queue : new SynchronizedPriorityQueueBRACES(queue, mutex);
	}
	
	/**
	 * Returns a synchronized PriorityDequeue instance based on the instance given.
	 * @param dequeue that should be synchronized
	 * @Type(T)
	 * @return a synchronized PriorityDequeue wrapper.
	 */
	public static GENERIC_KEY_BRACES PRIORITY_DEQUEUE KEY_GENERIC_TYPE synchronize(PRIORITY_DEQUEUE KEY_GENERIC_TYPE dequeue) {
		return dequeue instanceof SynchronizedPriorityDequeue ? (SynchronizedPriorityDequeue KEY_GENERIC_TYPE)dequeue : new SynchronizedPriorityDequeueBRACES(dequeue);
	}
	
	/**
	 * Returns a synchronized PriorityDequeue instance based on the instance given.
	 * @param dequeue that should be synchronized
	 * @param mutex is the controller of the synchronization block.
	 * @Type(T)
	 * @return a synchronized PriorityDequeue wrapper.
	 */
	public static GENERIC_KEY_BRACES PRIORITY_DEQUEUE KEY_GENERIC_TYPE synchronize(PRIORITY_DEQUEUE KEY_GENERIC_TYPE dequeue, Object mutex) {
		return dequeue instanceof SynchronizedPriorityDequeue ? (SynchronizedPriorityDequeue KEY_GENERIC_TYPE)dequeue : new SynchronizedPriorityDequeueBRACES(dequeue, mutex);
	}
	
	/**
	 * Wrapper class for synchronization
	 * @Type(T)
	 */
	public static class SynchronizedPriorityQueue KEY_GENERIC_TYPE implements PRIORITY_QUEUE KEY_GENERIC_TYPE
	{
		PRIORITY_QUEUE KEY_GENERIC_TYPE queue;
		protected Object mutex;
		
		protected SynchronizedPriorityQueue(PRIORITY_QUEUE KEY_GENERIC_TYPE queue) {
				this.queue = queue;
				mutex = this;
		}
		
		protected SynchronizedPriorityQueue(PRIORITY_QUEUE KEY_GENERIC_TYPE queue, Object mutex) {
			this.queue = queue;
			this.mutex = mutex;
		}
		
		@Override
		public ITERATOR KEY_GENERIC_TYPE iterator() { return queue.iterator(); }
		@Override
		public int size() { synchronized(mutex) { return queue.size(); } }
		@Override
		public void clear() { synchronized(mutex) { queue.clear(); } }
		@Override
		public void enqueue(KEY_TYPE e) { synchronized(mutex) { queue.enqueue(e); } }
		@Override
		public KEY_TYPE dequeue() { synchronized(mutex) { return queue.dequeue(); } }
		@Override
		public KEY_TYPE peek(int index) { synchronized(mutex) { return queue.peek(index); } }
		@Override
		public boolean removeFirst(KEY_TYPE e) { synchronized(mutex) { return queue.removeFirst(e); } }
		@Override
		public boolean removeLast(KEY_TYPE e) { synchronized(mutex) { return queue.removeLast(e); } }
		@Override
		public void onChanged() { synchronized(mutex) { queue.onChanged(); } }
		@Override
		public COMPARATOR KEY_SUPER_GENERIC_TYPE comparator() { synchronized(mutex) { return queue.comparator(); } }
		@Override
		public KEY_GENERIC_SPECIAL_TYPE KEY_SPECIAL_TYPE[] TO_ARRAY(KEY_SPECIAL_TYPE[] input) { synchronized(mutex) { return queue.TO_ARRAY(input); } }
	}
	
	/**
	 * Wrapper class for synchronization
	 * @Type(T)
	 */
	public static class SynchronizedPriorityDequeue KEY_GENERIC_TYPE extends SynchronizedPriorityQueue KEY_GENERIC_TYPE implements PRIORITY_DEQUEUE KEY_GENERIC_TYPE
	{
		PRIORITY_DEQUEUE KEY_GENERIC_TYPE dequeue;
		protected SynchronizedPriorityDequeue(PRIORITY_DEQUEUE KEY_GENERIC_TYPE queue) {
			super(queue);
			dequeue = queue;
		}
	
		protected SynchronizedPriorityDequeue(PRIORITY_DEQUEUE KEY_GENERIC_TYPE queue, Object mutex) {
			super(queue, mutex);
			dequeue = queue;
		}
		
		@Override
		public void enqueueFirst(KEY_TYPE e) { synchronized(mutex) { dequeue.enqueueFirst(e); } }
		@Override
		public KEY_TYPE dequeueLast() { synchronized(mutex) { return dequeue.dequeueLast(); } }
	}
}