franta-hg@16: /**
franta-hg@16: * SQL-DK
franta-hg@16: * Copyright © 2013 František Kučera (frantovo.cz)
franta-hg@16: *
franta-hg@16: * This program is free software: you can redistribute it and/or modify
franta-hg@16: * it under the terms of the GNU General Public License as published by
franta-hg@16: * the Free Software Foundation, either version 3 of the License, or
franta-hg@16: * (at your option) any later version.
franta-hg@16: *
franta-hg@16: * This program is distributed in the hope that it will be useful,
franta-hg@16: * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@16: * GNU General Public License for more details.
franta-hg@16: *
franta-hg@16: * You should have received a copy of the GNU General Public License
franta-hg@16: * along with this program. If not, see .
franta-hg@16: */
franta-hg@1: package info.globalcode.sql.dk;
franta-hg@1:
franta-hg@29: import info.globalcode.sql.dk.configuration.NameIdentified;
franta-hg@1: import java.util.ArrayList;
franta-hg@1: import java.util.Collection;
franta-hg@1: import java.util.Map;
franta-hg@1:
franta-hg@1: /**
franta-hg@1: *
franta-hg@1: * @author Ing. František Kučera (frantovo.cz)
franta-hg@1: */
franta-hg@1: public class Functions {
franta-hg@1:
franta-hg@1: private Functions() {
franta-hg@1: }
franta-hg@1:
franta-hg@1: public static boolean equalz(Object a, Object b) {
franta-hg@1: return a == null ? b == null : a.equals(b);
franta-hg@1: }
franta-hg@1:
franta-hg@1: /**
franta-hg@1: *
franta-hg@1: * @param text String to be examinated
franta-hg@1: * @param trim whether text should be trimmed before examination
franta-hg@1: * @return whether text is not empty and one or more characters long (after prospective trim)
franta-hg@1: */
franta-hg@1: public static boolean isEmpty(String text, boolean trim) {
franta-hg@1: if (text == null) {
franta-hg@1: return true;
franta-hg@1: } else {
franta-hg@1: if (trim) {
franta-hg@1: text = text.trim();
franta-hg@1: }
franta-hg@1: return text.isEmpty();
franta-hg@1: }
franta-hg@1: }
franta-hg@1:
franta-hg@1: /**
franta-hg@1: * @see #isEmpty(java.lang.String, boolean)
franta-hg@1: */
franta-hg@1: public static boolean isNotEmpty(String text, boolean trim) {
franta-hg@1: return !isEmpty(text, trim);
franta-hg@1: }
franta-hg@1:
franta-hg@1: public boolean isEmpty(Collection c) {
franta-hg@1: return c == null || c.isEmpty();
franta-hg@1: }
franta-hg@1:
franta-hg@1: public boolean isNotEmpty(Collection c) {
franta-hg@1: return !isEmpty(c);
franta-hg@1: }
franta-hg@1:
franta-hg@1: public boolean isEmpty(Map m) {
franta-hg@1: return m == null || m.isEmpty();
franta-hg@1: }
franta-hg@1:
franta-hg@1: public boolean isNotEmpty(Map m) {
franta-hg@1: return !isEmpty(m);
franta-hg@1: }
franta-hg@1:
franta-hg@1: /**
franta-hg@1: * @return empty collection if given one is null | or the original one
franta-hg@1: */
franta-hg@1: public static Collection notNull(Collection c) {
franta-hg@1: if (c == null) {
franta-hg@1: return new ArrayList<>();
franta-hg@1: } else {
franta-hg@1: return c;
franta-hg@1: }
franta-hg@1: }
franta-hg@29:
franta-hg@29: public static T findByName(Collection collection, String name) {
franta-hg@29: for (T element : collection) {
franta-hg@29: if (equalz(element.getName(), name)) {
franta-hg@29: return element;
franta-hg@29: }
franta-hg@29: }
franta-hg@29:
franta-hg@29: return null;
franta-hg@29: }
franta-hg@1: }