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comparison artifact-database/src/main/java/de/intevation/artifactdatabase/StringUtils.java @ 87:0f48188a6e02

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Added some javadoc to the artifactdatabase module. Not done yet. artifacts/trunk@839 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 26 Mar 2010 11:40:28 +0000
parents 8447467cef86
children 933bbc9fc11f
comparison
equal deleted inserted replaced
86:b2e0cb83631c 87:0f48188a6e02
9 import org.apache.commons.codec.binary.Hex; 9 import org.apache.commons.codec.binary.Hex;
10 10
11 import org.apache.log4j.Logger; 11 import org.apache.log4j.Logger;
12 12
13 /** 13 /**
14 * Commonly used string functions.
15 *
14 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> 16 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
15 */ 17 */
16 public final class StringUtils 18 public final class StringUtils
17 { 19 {
18 private static Logger logger = Logger.getLogger(StringUtils.class); 20 private static Logger logger = Logger.getLogger(StringUtils.class);
19 21
22 /**
23 * Generated a random UUIDv4 in form of a string.
24 * @return the UUID
25 */
20 public static final String newUUID() { 26 public static final String newUUID() {
21 return UUID.randomUUID().toString(); 27 return UUID.randomUUID().toString();
22 } 28 }
23 29
30 /**
31 * Checks if a given string is a valid UUID.
32 * @param uuid The string to test.
33 * @return true if the string is a valid UUID else false.
34 */
24 public static final boolean checkUUID(String uuid) { 35 public static final boolean checkUUID(String uuid) {
25 try { 36 try {
26 UUID.fromString(uuid); 37 UUID.fromString(uuid);
27 } 38 }
28 catch (IllegalArgumentException iae) { 39 catch (IllegalArgumentException iae) {
30 return false; 41 return false;
31 } 42 }
32 return true; 43 return true;
33 } 44 }
34 45
46 /**
47 * Returns the UTF-8 byte array representation of a given string.
48 * @param s The string to be transformed.
49 * @return The byte array representation.
50 */
35 public static final byte [] getUTF8Bytes(String s) { 51 public static final byte [] getUTF8Bytes(String s) {
36 try { 52 try {
37 return s.getBytes("UTF-8"); 53 return s.getBytes("UTF-8");
38 } 54 }
39 catch (UnsupportedEncodingException usee) { 55 catch (UnsupportedEncodingException usee) {
40 logger.error(usee.getLocalizedMessage(), usee); 56 logger.error(usee.getLocalizedMessage(), usee);
41 return s.getBytes(); 57 return s.getBytes();
42 } 58 }
43 } 59 }
44 60
61 /**
62 * Tries to convert a Base64 encoded string into the
63 * corresponing byte array.
64 * @param s The Base64 encoded string
65 * @return The byte array representation or null if
66 * an decoding error occurs.
67 */
45 public static final byte [] decodeHex(String s) { 68 public static final byte [] decodeHex(String s) {
46 try { 69 try {
47 return Hex.decodeHex(s.toCharArray()); 70 return Hex.decodeHex(s.toCharArray());
48 } 71 }
49 catch (DecoderException de) { 72 catch (DecoderException de) {
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