Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/utils/StringUtils.java @ 1119:7c4f81f74c47
merged gnv-artifacts
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:00 +0200 |
| parents | f953c9a559d8 |
| children |
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| 1027:fca4b5eb8d2f | 1119:7c4f81f74c47 |
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| 1 /* | |
| 2 * Copyright (c) 2010 by Intevation GmbH | |
| 3 * | |
| 4 * This program is free software under the LGPL (>=v2.1) | |
| 5 * Read the file LGPL.txt coming with the software for details | |
| 6 * or visit http://www.gnu.org/licenses/ if it does not exist. | |
| 7 */ | |
| 8 | |
| 9 package de.intevation.gnv.utils; | |
| 10 | |
| 11 /** | |
| 12 * Helper class which supports some methods for working with strings. | |
| 13 * | |
| 14 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> | |
| 15 */ | |
| 16 public final class StringUtils | |
| 17 { | |
| 18 private StringUtils() { | |
| 19 } | |
| 20 | |
| 21 /** | |
| 22 * Append a string to a string array. | |
| 23 * | |
| 24 * @param haystack String array. | |
| 25 * @param straw String to append. | |
| 26 * @return the new string array. | |
| 27 */ | |
| 28 public static final String [] append(String [] haystack, String straw) { | |
| 29 if (haystack == null) { | |
| 30 return new String [] { straw }; | |
| 31 } | |
| 32 String [] nhaystack = new String[haystack.length + 1]; | |
| 33 System.arraycopy(haystack, 0, nhaystack, 0, haystack.length); | |
| 34 nhaystack[haystack.length] = straw; | |
| 35 return nhaystack; | |
| 36 } | |
| 37 | |
| 38 /** | |
| 39 * Checks the existence of a string in a given string array. | |
| 40 * | |
| 41 * @param haystack String array. | |
| 42 * @param needle String for being checked. | |
| 43 * @return true, if the string is contained in <i>haystack</i> - else false. | |
| 44 */ | |
| 45 public static final boolean contains(String [] haystack, String needle) { | |
| 46 if (haystack == null) { | |
| 47 return false; | |
| 48 } | |
| 49 | |
| 50 if (needle == null) { | |
| 51 for (int i = haystack.length - 1; i >= 0; --i) { | |
| 52 if (haystack[i] == null) { | |
| 53 return true; | |
| 54 } | |
| 55 } | |
| 56 } | |
| 57 else { | |
| 58 for (int i = haystack.length - 1; i >= 0; --i) { | |
| 59 String straw = haystack[i]; | |
| 60 if (straw != null && straw.equals(needle)) { | |
| 61 return true; | |
| 62 } | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 return false; | |
| 67 } | |
| 68 } | |
| 69 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |