Project update.

trunk/java/com/l2jmobius/util/EmptyQueue.java

@@ -0,0 +1,145 @@
+/*
+ * This file is part of the L2J Mobius project.
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jmobius.util;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Queue;
+
+/**
+ * @author UnAfraid
+ * @param <E>
+ */
+public final class EmptyQueue<E> implements Queue<E>
+{
+	private static final Queue<Object> EMPTY_QUEUE = new EmptyQueue<>();
+	
+	@SuppressWarnings("unchecked")
+	public static <E> Queue<E> emptyQueue()
+	{
+		return (Queue<E>) EMPTY_QUEUE;
+	}
+	
+	@Override
+	public int size()
+	{
+		return 0;
+	}
+	
+	@Override
+	public boolean isEmpty()
+	{
+		return true;
+	}
+	
+	@Override
+	public boolean contains(Object o)
+	{
+		return false;
+	}
+	
+	@Override
+	public Iterator<E> iterator()
+	{
+		return Collections.<E> emptyIterator();
+	}
+	
+	@Override
+	public Object[] toArray()
+	{
+		return new Object[0];
+	}
+	
+	@Override
+	public <T> T[] toArray(T[] a)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean remove(Object o)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean containsAll(Collection<?> c)
+	{
+		return false;
+	}
+	
+	@Override
+	public boolean addAll(Collection<? extends E> c)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean removeAll(Collection<?> c)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean retainAll(Collection<?> c)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public void clear()
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean add(E e)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public boolean offer(E e)
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public E remove()
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public E poll()
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public E element()
+	{
+		throw new UnsupportedOperationException();
+	}
+	
+	@Override
+	public E peek()
+	{
+		throw new UnsupportedOperationException();
+	}
+}