Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/utils/StringUtils.java @ 1030:c07d9f9a738c

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Removed bugs that existed in the caching mechanism (issue264, issue268). gnv-artifacts/trunk@1067 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 06 May 2010 08:32:56 +0000
parents 2cea76f1112e
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.utils;
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2
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3 /**
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4 * Helper class which supports some methods for working with strings.
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5 *
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c4156275c1e1 Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
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6 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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7 */
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8 public final class StringUtils
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9 {
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10 private StringUtils() {
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11 }
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12
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13 /**
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14 * Append a string to a string array.
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15 *
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16 * @param haystack String array.
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17 * @param straw String to append.
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18 * @return the new string array.
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19 */
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20 public static final String [] append(String [] haystack, String straw) {
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21 if (haystack == null) {
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22 return new String [] { straw };
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23 }
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24 String [] nhaystack = new String[haystack.length + 1];
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25 System.arraycopy(haystack, 0, nhaystack, 0, haystack.length);
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26 nhaystack[haystack.length] = straw;
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27 return nhaystack;
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28 }
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29
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30 /**
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31 * Checks the existence of a string in a given string array.
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32 *
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33 * @param haystack String array.
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34 * @param needle String for being checked.
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35 * @return true, if the string is contained in <i>haystack</i> - else false.
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36 */
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37 public static final boolean contains(String [] haystack, String needle) {
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38 if (haystack == null) {
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39 return false;
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40 }
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41
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42 if (needle == null) {
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43 for (int i = haystack.length - 1; i >= 0; --i) {
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44 if (haystack[i] == null) {
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45 return true;
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46 }
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47 }
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48 }
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49 else {
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50 for (int i = haystack.length - 1; i >= 0; --i) {
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51 String straw = haystack[i];
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52 if (straw != null && straw.equals(needle)) {
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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
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58 return false;
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59 }
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60 }
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61 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org