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/*
 * eXist-db Open Source Native XML Database
 * Copyright (C) 2001 The eXist-db Authors
 *
 * [email protected]
 * http://www.exist-db.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.exist.util;

import java.util.List;

/**
	This class only contains static
	methods which help when the values
	of two positions in a array or
	list-like structure must be swapped.
	
	Based on previous implementations
	found in eXist FastQSort original
	code and internet
*/
public final class SwapVals {
	public final static void swap(long[] a, int i, int j)
	//-----------------------------------------------
	{
		long T = a[i];
		a[i] = a[j];
		a[j] = T;
	}

	public final static void swap(int[] a, int i, int j)
	//-----------------------------------------------
	{
		int T = a[i];
		a[i] = a[j];
		a[j] = T;
	}

	public final static void swap(Object[] a, int i, int j)
	//-----------------------------------------------
	{
//		assert a != null : "Trying to swap elements in a null array!";
		
		Object T = a[i];
		a[i] = a[j];
		a[j] = T;
	}

	public final static  void swap(List a, int i, int j)
	//-----------------------------------------------
	{
		C T;

		T = a.get(i);
		a.set(i, a.get(j));
		a.set(j, T);
	}
//
//	public final static >void swap(C[] a, int i, int j)
//	//-----------------------------------------------
//	{
//		Comparable T;
//
//		T = a[i];
//		a[i] = a[j];
//		a[j] = T;
//	}
}




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