package info.globalcode.sql.dk;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Map;

 /**

  *

  * @author Ing. František Kučera (frantovo.cz)

  */

 public class Functions {

 	private Functions() {

 	}

 	public static boolean equalz(Object a, Object b) {

 		return a == null ? b == null : a.equals(b);

 	}

 	/**

 	 *

 	 * @param text String to be examinated

 	 * @param trim whether text should be trimmed before examination

 	 * @return whether text is not empty and one or more characters long (after prospective trim)

 	 */

 	public static boolean isEmpty(String text, boolean trim) {

 		if (text == null) {

 			return true;

 		} else {

 			if (trim) {

 				text = text.trim();

 			}

 			return text.isEmpty();

 		}

 	}

 	/**

 	 * @see #isEmpty(java.lang.String, boolean)

 	 */

 	public static boolean isNotEmpty(String text, boolean trim) {

 		return !isEmpty(text, trim);

 	}

 	public boolean isEmpty(Collection c) {

 		return c == null || c.isEmpty();

 	}

 	public boolean isNotEmpty(Collection c) {

 		return !isEmpty(c);

 	}

 	public boolean isEmpty(Map m) {

 		return m == null || m.isEmpty();

 	}

 	public boolean isNotEmpty(Map m) {

 		return !isEmpty(m);

 	}

 	/**

 	 * @return empty collection if given one is null | or the original one

 	 */

 	public static <T> Collection<T> notNull(Collection<T> c) {

 		if (c == null) {

 			return new ArrayList<>();

 		} else {

 			return c;

 		}

 	}

 }