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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/StringUtils.java @ 93:e27cf9c84eb8

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Unified imports. artifacts/trunk@849 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 28 Mar 2010 15:57:40 +0000
parents 0f48188a6e02
children 933bbc9fc11f
rev   line source
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f69e5b87f05f Implementation to export artifacts as xml (applied patch from issue208 by SLT).
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1 package de.intevation.artifactdatabase;
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2
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3 import java.io.UnsupportedEncodingException;
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4
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5 import java.util.UUID;
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6
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7 import org.apache.commons.codec.DecoderException;
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8
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9 import org.apache.commons.codec.binary.Hex;
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10
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11 import org.apache.log4j.Logger;
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12
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13 /**
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14 * Commonly used string functions.
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15 *
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16 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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17 */
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18 public final class StringUtils
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19 {
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20 private static Logger logger = Logger.getLogger(StringUtils.class);
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21
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22 /**
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23 * Generated a random UUIDv4 in form of a string.
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24 * @return the UUID
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25 */
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26 public static final String newUUID() {
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27 return UUID.randomUUID().toString();
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28 }
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29
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30 /**
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31 * Checks if a given string is a valid UUID.
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32 * @param uuid The string to test.
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33 * @return true if the string is a valid UUID else false.
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34 */
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35 public static final boolean checkUUID(String uuid) {
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36 try {
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37 UUID.fromString(uuid);
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38 }
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39 catch (IllegalArgumentException iae) {
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40 logger.warn(iae.getLocalizedMessage());
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41 return false;
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42 }
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43 return true;
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44 }
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45
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46 /**
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47 * Returns the UTF-8 byte array representation of a given string.
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48 * @param s The string to be transformed.
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49 * @return The byte array representation.
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50 */
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51 public static final byte [] getUTF8Bytes(String s) {
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52 try {
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53 return s.getBytes("UTF-8");
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54 }
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55 catch (UnsupportedEncodingException usee) {
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56 logger.error(usee.getLocalizedMessage(), usee);
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57 return s.getBytes();
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58 }
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59 }
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60
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61 /**
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62 * Tries to convert a Base64 encoded string into the
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63 * corresponing byte array.
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64 * @param s The Base64 encoded string
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65 * @return The byte array representation or null if
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66 * an decoding error occurs.
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67 */
80
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68 public static final byte [] decodeHex(String s) {
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69 try {
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70 return Hex.decodeHex(s.toCharArray());
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71 }
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72 catch (DecoderException de) {
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73 return null;
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74 }
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75 }
79
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76 }
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77 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org