Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/transitions/TransitionEngine.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> |
|---|---|
| date | Thu, 03 Feb 2011 10:23:30 +0000 |
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| 105:beb991dc4827 | 106:5864c41219db |
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| 1 package de.intevation.flys.artifacts.transitions; | |
| 2 | |
| 3 import java.util.HashMap; | |
| 4 import java.util.List; | |
| 5 import java.util.Map; | |
| 6 | |
| 7 import org.apache.log4j.Logger; | |
| 8 | |
| 9 /** | |
| 10 * The TransitionEngine stores all transitions for each Artifact and should be | |
| 11 * used to determine, if an Artifact is able to advance from one to another | |
| 12 * state. | |
| 13 * | |
| 14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 15 */ | |
| 16 public class TransitionEngine { | |
| 17 | |
| 18 /** The logger used in this class. */ | |
| 19 private static Logger logger = Logger.getLogger(TransitionEngine.class); | |
| 20 | |
| 21 /** | |
| 22 * A map that contains the transitions of the artifacts. The key is the name | |
| 23 * of the artifact, its value is a list of all transitions of this artifact. | |
| 24 */ | |
| 25 protected Map<String, List> transitions; | |
| 26 | |
| 27 | |
| 28 /** | |
| 29 * The default constructor. | |
| 30 */ | |
| 31 public TransitionEngine() { | |
| 32 transitions = new HashMap<String, List>(); | |
| 33 } | |
| 34 | |
| 35 | |
| 36 /** | |
| 37 * Add new transitions for a specific artifact. | |
| 38 * | |
| 39 * @param artifact the name of the Artifact. | |
| 40 * @param transitions the list of transition of the artifact. | |
| 41 * | |
| 42 * @return true, if the transitions were added, otherwise false. | |
| 43 */ | |
| 44 public boolean addTransition(String artifact, List transitions) { | |
| 45 List tmp = this.transitions.get(artifact); | |
| 46 | |
| 47 if (tmp != null) { | |
| 48 logger.info( | |
| 49 "Transitions for the artifact '" | |
| 50 + artifact | |
| 51 + "' already stored."); | |
| 52 | |
| 53 return false; | |
| 54 } | |
| 55 | |
| 56 logger.debug("Add new transitions for artifact '" + artifact + "'"); | |
| 57 return this.transitions.put(artifact, transitions) != null; | |
| 58 } | |
| 59 } | |
| 60 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |