author | František Kučera <franta-hg@frantovo.cz> |
Fri, 27 Dec 2013 15:58:46 +0100 | |
branch | v_0 |
changeset 78 | d98f33d91553 |
parent 54 | 53020d0bd2e4 |
child 88 | 102ba0fcb07f |
permissions | -rw-r--r-- |
16 | 1 |
/** |
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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 info.globalcode.sql.dk.configuration.NameIdentified; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.io.PrintWriter; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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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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public static <T extends NameIdentified> T findByName(Collection<T> collection, String name) { |
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for (T element : collection) { |
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if (element != null && equalz(element.getName(), name)) { |
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return element; |
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} |
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} |
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return null; |
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} |
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/** |
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* Copy file from Java resources to file system. |
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*/ |
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public static void installResource(String resourceName, File target) throws IOException { |
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try (BufferedReader reader = new BufferedReader(new InputStreamReader(Functions.class.getClassLoader().getResourceAsStream(resourceName)))) { |
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try (PrintWriter writer = new PrintWriter(target)) { |
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while (true) { |
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112 |
String line = reader.readLine(); |
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if (line == null) { |
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114 |
break; |
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} else { |
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writer.println(line); |
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117 |
} |
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118 |
} |
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} |
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} |
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} |
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public static String rpad(String s, int n) { |
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return String.format("%1$-" + n + "s", s); |
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} |
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public static String lpad(String s, int n) { |
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return String.format("%1$" + n + "s", s); |
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String padding functions: lpad(), rpad()
František Kučera <franta-hg@frantovo.cz>
parents:
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129 |
} |
40
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
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changeset
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130 |
|
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
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changeset
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131 |
public static String repeat(char ch, int count) { |
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
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132 |
char[] array = new char[count]; |
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
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133 |
Arrays.fill(array, ch); |
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
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changeset
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134 |
return new String(array); |
a9db7fb3ce65
TabularFormatter: print colorful tables\!
František Kučera <franta-hg@frantovo.cz>
parents:
38
diff
changeset
|
135 |
} |
1
f32dac78d13a
WOW some classes LOL; TODO: refactor
František Kučera <franta-hg@frantovo.cz>
parents:
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136 |
} |