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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/transition/TransitionEngine.java @ 106:ece0fdb07975

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Implementations to initialize and retrieve states. artifacts/trunk@1291 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 04 Feb 2011 10:50:53 +0000
parents 26bfff409dd3
children 9ece61d918b1
rev   line source
104
26bfff409dd3 Added interfaces and engines used in concrete artifact packages.
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1 package de.intevation.artifactdatabase.transition;
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2
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3 import java.util.HashMap;
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4 import java.util.List;
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5 import java.util.Map;
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6
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7 import org.apache.log4j.Logger;
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8
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9 /**
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10 * The TransitionEngine stores all transitions for each Artifact and should be
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11 * used to determine, if an Artifact is able to advance from one to another
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12 * state.
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13 *
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14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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15 */
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16 public class TransitionEngine {
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17
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18 /** The logger used in this class. */
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19 private static Logger logger = Logger.getLogger(TransitionEngine.class);
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20
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21 /**
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22 * A map that contains the transitions of the artifacts. The key is the name
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23 * of the artifact, its value is a list of all transitions of this artifact.
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24 */
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25 protected Map<String, List> transitions;
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26
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27
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28 /**
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29 * The default constructor.
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30 */
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31 public TransitionEngine() {
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32 transitions = new HashMap<String, List>();
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33 }
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34
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35
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36 /**
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37 * Add new transitions for a specific artifact.
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38 *
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39 * @param stateId the name of the Artifact.
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40 * @param transitions the list of transition of the artifact.
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41 *
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42 * @return true, if the transitions were added, otherwise false.
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43 */
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44 public boolean addTransition(String stateId, List transitions) {
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45 List tmp = this.transitions.get(stateId);
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46
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47 if (tmp != null) {
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48 logger.info(
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49 "Transitions for the state '"
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50 + stateId
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51 + "' already stored.");
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52
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53 return false;
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54 }
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55
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56 logger.debug("Add new transitions for state '" + stateId + "'");
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57 return this.transitions.put(stateId, transitions) != null;
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58 }
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59 }
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60 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org