Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/TransitionFactory.java @ 106:5864c41219db
Initializes a TransitionEngine storing all transitions for each artifact at the application start.
flys-artifacts/trunk@1288 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 03 Feb 2011 10:23:30 +0000 |
parents | |
children | a228b39494a9 |
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105:beb991dc4827 | 106:5864c41219db |
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1 package de.intevation.flys.artifacts.transitions; | |
2 | |
3 import javax.xml.xpath.XPathConstants; | |
4 | |
5 import org.apache.log4j.Logger; | |
6 | |
7 import org.w3c.dom.Node; | |
8 | |
9 import de.intevation.artifacts.common.utils.XMLUtils; | |
10 | |
11 | |
12 /** | |
13 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
14 */ | |
15 public class TransitionFactory { | |
16 | |
17 /** The logger used in this class */ | |
18 private static Logger logger = Logger.getLogger(TransitionFactory.class); | |
19 | |
20 /** The XPath to the classname of the transition */ | |
21 public static final String XPATH_TRANSITION = "@transition"; | |
22 | |
23 /** The XPath to the current state ID */ | |
24 public static final String XPATH_CURRENT_STATE = "from/@state"; | |
25 | |
26 /** The XPath to the target state ID */ | |
27 public static final String XPATH_TARGET_STATE = "to/@state"; | |
28 | |
29 | |
30 /** | |
31 * Creates a new Transition based on the configured class provided by | |
32 * <code>transitionConf</code>. | |
33 * | |
34 * @param transitionConf The configuration of the transition. | |
35 * | |
36 * @return a Transition. | |
37 */ | |
38 public static Transition createTransition(Node transitionConf) { | |
39 String clazz = (String) XMLUtils.xpath( | |
40 transitionConf, XPATH_TRANSITION, XPathConstants.STRING); | |
41 | |
42 Transition transition = null; | |
43 | |
44 try { | |
45 transition = (Transition) Class.forName(clazz).newInstance(); | |
46 | |
47 String from = (String) XMLUtils.xpath( | |
48 transitionConf, XPATH_CURRENT_STATE, XPathConstants.STRING); | |
49 String to = (String) XMLUtils.xpath( | |
50 transitionConf, XPATH_TARGET_STATE, XPathConstants.STRING); | |
51 | |
52 transition.setFrom(from); | |
53 transition.setTo(to); | |
54 } | |
55 catch (InstantiationException ie) { | |
56 logger.error(ie, ie); | |
57 } | |
58 catch (IllegalAccessException iae) { | |
59 logger.error(iae, iae); | |
60 } | |
61 catch (ClassNotFoundException cnfe) { | |
62 logger.error(cnfe, cnfe); | |
63 } | |
64 | |
65 return transition; | |
66 } | |
67 } | |
68 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |