Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/utils/StringUtils.java @ 875:5e9efdda6894
merged gnv-artifacts/1.0
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:13:56 +0200 |
| parents | 2cea76f1112e |
| children | f953c9a559d8 |
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| 722:bb3ffe7d719e | 875:5e9efdda6894 |
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| 1 package de.intevation.gnv.utils; | |
| 2 | |
| 3 /** | |
| 4 * Helper class which supports some methods for working with strings. | |
| 5 * | |
| 6 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> | |
| 7 */ | |
| 8 public final class StringUtils | |
| 9 { | |
| 10 private StringUtils() { | |
| 11 } | |
| 12 | |
| 13 /** | |
| 14 * Append a string to a string array. | |
| 15 * | |
| 16 * @param haystack String array. | |
| 17 * @param straw String to append. | |
| 18 * @return the new string array. | |
| 19 */ | |
| 20 public static final String [] append(String [] haystack, String straw) { | |
| 21 if (haystack == null) { | |
| 22 return new String [] { straw }; | |
| 23 } | |
| 24 String [] nhaystack = new String[haystack.length + 1]; | |
| 25 System.arraycopy(haystack, 0, nhaystack, 0, haystack.length); | |
| 26 nhaystack[haystack.length] = straw; | |
| 27 return nhaystack; | |
| 28 } | |
| 29 | |
| 30 /** | |
| 31 * Checks the existence of a string in a given string array. | |
| 32 * | |
| 33 * @param haystack String array. | |
| 34 * @param needle String for being checked. | |
| 35 * @return true, if the string is contained in <i>haystack</i> - else false. | |
| 36 */ | |
| 37 public static final boolean contains(String [] haystack, String needle) { | |
| 38 if (haystack == null) { | |
| 39 return false; | |
| 40 } | |
| 41 | |
| 42 if (needle == null) { | |
| 43 for (int i = haystack.length - 1; i >= 0; --i) { | |
| 44 if (haystack[i] == null) { | |
| 45 return true; | |
| 46 } | |
| 47 } | |
| 48 } | |
| 49 else { | |
| 50 for (int i = haystack.length - 1; i >= 0; --i) { | |
| 51 String straw = haystack[i]; | |
| 52 if (straw != null && straw.equals(needle)) { | |
| 53 return true; | |
| 54 } | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 return false; | |
| 59 } | |
| 60 } | |
| 61 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |