/**
* SQL-DK
* Copyright © 2013 František Kučera (frantovo.cz)
*
* 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 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;
}
}
}