Mercurial > dive4elements > framework
diff artifact-database/src/main/java/de/intevation/artifactdatabase/transition/TransitionEngine.java @ 104:26bfff409dd3
Added interfaces and engines used in concrete artifact packages.
artifacts/trunk@1289 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 03 Feb 2011 18:00:41 +0000 |
parents | |
children | 9ece61d918b1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/transition/TransitionEngine.java Thu Feb 03 18:00:41 2011 +0000 @@ -0,0 +1,60 @@ +package de.intevation.artifactdatabase.transition; + +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import org.apache.log4j.Logger; + +/** + * The TransitionEngine stores all transitions for each Artifact and should be + * used to determine, if an Artifact is able to advance from one to another + * state. + * + * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> + */ +public class TransitionEngine { + + /** The logger used in this class. */ + private static Logger logger = Logger.getLogger(TransitionEngine.class); + + /** + * A map that contains the transitions of the artifacts. The key is the name + * of the artifact, its value is a list of all transitions of this artifact. + */ + protected Map<String, List> transitions; + + + /** + * The default constructor. + */ + public TransitionEngine() { + transitions = new HashMap<String, List>(); + } + + + /** + * Add new transitions for a specific artifact. + * + * @param stateId the name of the Artifact. + * @param transitions the list of transition of the artifact. + * + * @return true, if the transitions were added, otherwise false. + */ + public boolean addTransition(String stateId, List transitions) { + List tmp = this.transitions.get(stateId); + + if (tmp != null) { + logger.info( + "Transitions for the state '" + + stateId + + "' already stored."); + + return false; + } + + logger.debug("Add new transitions for state '" + stateId + "'"); + return this.transitions.put(stateId, transitions) != null; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :