tim@612: package de.intevation.gnv.transition;
tim@612: 
tim@612: import java.util.Map;
tim@612: 
tim@612: import org.apache.log4j.Logger;
sascha@779: import org.w3c.dom.Node;
tim@612: 
tim@824: import de.intevation.artifactdatabase.Config;
tim@824: import de.intevation.gnv.state.InputData;
tim@824: import de.intevation.gnv.state.State;
tim@824: 
tim@612: /**
tim@824:  * Class which supports the possibility to validate if a
tim@824:  * Transition could be done using simple Valuecompare Operations.
tim@824:  * The Compareoperations will use the preSettings of an Artifact.
tim@824:  * At this Time equal and notequal-operations are supported.
tim@824:  * The Comparation is casesensitive.
sascha@780:  * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
tim@612:  *
tim@612:  */
tim@612: public class PresettingsValueCompareTransition extends TransitionBase {
tim@612: 
tim@612:     /**
tim@612:      * the logger, used to log exceptions and additonaly information
tim@612:      */
tim@612:     private static Logger log = Logger.getLogger(PresettingsValueCompareTransition.class);
sascha@778: 
tim@824:     /**
sascha@835:      * The Name of the Datafield the Value  that should be compared
tim@824:      * should be fetched from.
tim@824:      */
tim@612:     private String dataName = null;
tim@824:     /**
tim@824:      * The Value that should be set to the State.
tim@824:      */
tim@612:     private String dataValue = null;
tim@824:     /**
tim@824:      * The Operation that should be used (equal notequal)
tim@824:      */
tim@612:     private String operator = null;
sascha@778: 
tim@612:     /**
tim@612:      * The UID of this Class.
tim@612:      */
tim@612:     private static final long serialVersionUID = -7846722158776823205L;
tim@612: 
tim@612:     /**
tim@612:      * Constructor
tim@612:      */
tim@612:     public PresettingsValueCompareTransition() {
tim@612:         super();
tim@612:     }
tim@612: 
ingo@813: 
tim@612:     public boolean isValid(State state) {
tim@612:         Map<String, InputData> preSettings = state.getPreSettings();
tim@612:         if (preSettings != null){
tim@612:             boolean dataAvailable = preSettings.containsKey(dataName);
tim@612:             if (dataAvailable){
tim@612:                 if (operator.equals("equal")){
tim@612:                     return preSettings.get(dataName).getValue().startsWith(dataValue);
tim@612:                 }else if (operator.equals("notequal")){
tim@612:                     return !preSettings.get(dataName).getValue().startsWith(dataValue);
tim@612:                 }
tim@612:             }
tim@612:         }
tim@612:         if (operator.equals("notequal")){
tim@612:             return true;
tim@612:         }
tim@612:         return false;
tim@612:     }
tim@612: 
ingo@813: 
tim@612:     @Override
tim@612:     public void setup(Node configuration) {
tim@612:         super.setup(configuration);
tim@612:         this.dataName = Config.getStringXPath(configuration,"condition/@inputvalue");
tim@612:         this.dataValue = Config.getStringXPath(configuration,"condition/@value");
tim@612:         this.operator = Config.getStringXPath(configuration,"condition/@operator");
tim@612:     }
tim@612: }
ingo@813: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :