author | František Kučera <franta-hg@frantovo.cz> |
Sun, 15 Dec 2013 19:20:50 +0100 | |
branch | v_0 |
changeset 1 | f32dac78d13a |
child 16 | 5b8fcd35d4d6 |
permissions | -rw-r--r-- |
franta-hg@1 | 1 |
package info.globalcode.sql.dk; |
franta-hg@1 | 2 |
|
franta-hg@1 | 3 |
import java.util.ArrayList; |
franta-hg@1 | 4 |
import java.util.Collection; |
franta-hg@1 | 5 |
import java.util.Map; |
franta-hg@1 | 6 |
|
franta-hg@1 | 7 |
/** |
franta-hg@1 | 8 |
* |
franta-hg@1 | 9 |
* @author Ing. František Kučera (frantovo.cz) |
franta-hg@1 | 10 |
*/ |
franta-hg@1 | 11 |
public class Functions { |
franta-hg@1 | 12 |
|
franta-hg@1 | 13 |
private Functions() { |
franta-hg@1 | 14 |
} |
franta-hg@1 | 15 |
|
franta-hg@1 | 16 |
public static boolean equalz(Object a, Object b) { |
franta-hg@1 | 17 |
return a == null ? b == null : a.equals(b); |
franta-hg@1 | 18 |
} |
franta-hg@1 | 19 |
|
franta-hg@1 | 20 |
/** |
franta-hg@1 | 21 |
* |
franta-hg@1 | 22 |
* @param text String to be examinated |
franta-hg@1 | 23 |
* @param trim whether text should be trimmed before examination |
franta-hg@1 | 24 |
* @return whether text is not empty and one or more characters long (after prospective trim) |
franta-hg@1 | 25 |
*/ |
franta-hg@1 | 26 |
public static boolean isEmpty(String text, boolean trim) { |
franta-hg@1 | 27 |
if (text == null) { |
franta-hg@1 | 28 |
return true; |
franta-hg@1 | 29 |
} else { |
franta-hg@1 | 30 |
if (trim) { |
franta-hg@1 | 31 |
text = text.trim(); |
franta-hg@1 | 32 |
} |
franta-hg@1 | 33 |
return text.isEmpty(); |
franta-hg@1 | 34 |
} |
franta-hg@1 | 35 |
} |
franta-hg@1 | 36 |
|
franta-hg@1 | 37 |
/** |
franta-hg@1 | 38 |
* @see #isEmpty(java.lang.String, boolean) |
franta-hg@1 | 39 |
*/ |
franta-hg@1 | 40 |
public static boolean isNotEmpty(String text, boolean trim) { |
franta-hg@1 | 41 |
return !isEmpty(text, trim); |
franta-hg@1 | 42 |
} |
franta-hg@1 | 43 |
|
franta-hg@1 | 44 |
public boolean isEmpty(Collection c) { |
franta-hg@1 | 45 |
return c == null || c.isEmpty(); |
franta-hg@1 | 46 |
} |
franta-hg@1 | 47 |
|
franta-hg@1 | 48 |
public boolean isNotEmpty(Collection c) { |
franta-hg@1 | 49 |
return !isEmpty(c); |
franta-hg@1 | 50 |
} |
franta-hg@1 | 51 |
|
franta-hg@1 | 52 |
public boolean isEmpty(Map m) { |
franta-hg@1 | 53 |
return m == null || m.isEmpty(); |
franta-hg@1 | 54 |
} |
franta-hg@1 | 55 |
|
franta-hg@1 | 56 |
public boolean isNotEmpty(Map m) { |
franta-hg@1 | 57 |
return !isEmpty(m); |
franta-hg@1 | 58 |
} |
franta-hg@1 | 59 |
|
franta-hg@1 | 60 |
/** |
franta-hg@1 | 61 |
* @return empty collection if given one is null | or the original one |
franta-hg@1 | 62 |
*/ |
franta-hg@1 | 63 |
public static <T> Collection<T> notNull(Collection<T> c) { |
franta-hg@1 | 64 |
if (c == null) { |
franta-hg@1 | 65 |
return new ArrayList<>(); |
franta-hg@1 | 66 |
} else { |
franta-hg@1 | 67 |
return c; |
franta-hg@1 | 68 |
} |
franta-hg@1 | 69 |
} |
franta-hg@1 | 70 |
} |