author | František Kučera <franta-hg@frantovo.cz> |
Mon, 16 Dec 2013 20:01:37 +0100 | |
branch | v_0 |
changeset 16 | 5b8fcd35d4d6 |
parent 1 | f32dac78d13a |
child 29 | d66858b4b563 |
permissions | -rw-r--r-- |
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/** |
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* SQL-DK |
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* Copyright © 2013 František Kučera (frantovo.cz) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package info.globalcode.sql.dk; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Map; |
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/** |
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* |
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* @author Ing. František Kučera (frantovo.cz) |
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*/ |
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public class Functions { |
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private Functions() { |
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} |
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public static boolean equalz(Object a, Object b) { |
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return a == null ? b == null : a.equals(b); |
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} |
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/** |
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* |
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* @param text String to be examinated |
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* @param trim whether text should be trimmed before examination |
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* @return whether text is not empty and one or more characters long (after prospective trim) |
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*/ |
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public static boolean isEmpty(String text, boolean trim) { |
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if (text == null) { |
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return true; |
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} else { |
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if (trim) { |
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text = text.trim(); |
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} |
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return text.isEmpty(); |
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} |
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} |
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/** |
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* @see #isEmpty(java.lang.String, boolean) |
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*/ |
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public static boolean isNotEmpty(String text, boolean trim) { |
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return !isEmpty(text, trim); |
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} |
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public boolean isEmpty(Collection c) { |
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return c == null || c.isEmpty(); |
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} |
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public boolean isNotEmpty(Collection c) { |
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return !isEmpty(c); |
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} |
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public boolean isEmpty(Map m) { |
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return m == null || m.isEmpty(); |
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} |
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public boolean isNotEmpty(Map m) { |
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return !isEmpty(m); |
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} |
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/** |
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* @return empty collection if given one is null | or the original one |
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*/ |
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public static <T> Collection<T> notNull(Collection<T> c) { |
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if (c == null) { |
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return new ArrayList<>(); |
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} else { |
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return c; |
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} |
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} |
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} |