Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/StringUtils.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 2cea76f1112e
children
rev   line source
1115
f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.utils;
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10
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11 /**
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12 * Helper class which supports some methods for working with strings.
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13 *
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14 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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15 */
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16 public final class StringUtils
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17 {
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18 private StringUtils() {
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19 }
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20
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21 /**
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22 * Append a string to a string array.
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23 *
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24 * @param haystack String array.
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25 * @param straw String to append.
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26 * @return the new string array.
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27 */
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28 public static final String [] append(String [] haystack, String straw) {
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29 if (haystack == null) {
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30 return new String [] { straw };
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31 }
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32 String [] nhaystack = new String[haystack.length + 1];
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33 System.arraycopy(haystack, 0, nhaystack, 0, haystack.length);
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34 nhaystack[haystack.length] = straw;
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35 return nhaystack;
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36 }
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37
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38 /**
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39 * Checks the existence of a string in a given string array.
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40 *
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41 * @param haystack String array.
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42 * @param needle String for being checked.
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43 * @return true, if the string is contained in <i>haystack</i> - else false.
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44 */
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45 public static final boolean contains(String [] haystack, String needle) {
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46 if (haystack == null) {
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47 return false;
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48 }
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49
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50 if (needle == null) {
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51 for (int i = haystack.length - 1; i >= 0; --i) {
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52 if (haystack[i] == null) {
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53 return true;
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54 }
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55 }
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56 }
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57 else {
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58 for (int i = haystack.length - 1; i >= 0; --i) {
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59 String straw = haystack[i];
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60 if (straw != null && straw.equals(needle)) {
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61 return true;
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62 }
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63 }
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64 }
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65
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66 return false;
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67 }
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68 }
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69 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org