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/*
 *
 * The DbUnit Database Testing Framework
 * Copyright (C)2005, DbUnit.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

package org.dbunit.util;

import java.util.Set;

import org.apache.commons.collections.set.ListOrderedSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Helper for collections-related methods.
 * 
* @author Felipe Leme ([email protected]) * @author gommma (gommma AT users.sourceforge.net) * @author Last changed by: $Author$ * @version $Revision$ $Date$ * @since Nov 5, 2005 */ public class CollectionsHelper { /** * Logger for this class */ private static final Logger logger = LoggerFactory.getLogger(CollectionsHelper.class); // class is "static" private CollectionsHelper() {} /** * Returns a Set from an array of objects. * Note the Iterator returned by this Set preserves the order of the array. * @param objects array of objects * @return Set with the elements of the array or null if entry is null */ public static Set objectsToSet( Object[] objects ) { logger.debug("objectsToSet(objects={}) - start", objects); if ( objects == null ) { return null; } Set set = new ListOrderedSet(); for (int i = 0; i < objects.length; i++) { set.add(objects[i]); } return set; } /** * Returns an array of Objects from a Set. * @param set a Set * @return array of Objects with the elements of the Set or null if set is null */ public static Object[] setToObjects( Set set ) { logger.debug("setToObjects(set={}) - start", set); if ( set == null ) { return null; } else { return set.toArray(); } } /** * Returns an array of Strings from a Set. * @param set a Set of Strings * @return array of Strings with the elements of the Set or null if set is null */ public static String[] setToStrings( Set set ) { logger.debug("setToStrings(set={}) - start", set); if ( set == null ) { return null; } else { String[] strings = (String[]) set.toArray(new String[0]); return strings; } }; }




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