rrenkert@8251: package org.dive4elements.river.exports.injector;
rrenkert@8251: 
rrenkert@8251: import org.apache.log4j.Logger;
rrenkert@8251: import org.dive4elements.artifacts.Artifact;
rrenkert@8251: import org.dive4elements.artifacts.CallContext;
rrenkert@8251: import org.dive4elements.artifacts.ContextInjector;
rrenkert@8251: import org.dive4elements.river.artifacts.D4EArtifact;
rrenkert@8251: import org.dive4elements.river.artifacts.access.RangeAccess;
rrenkert@8251: import org.dive4elements.river.model.Gauge;
rrenkert@8251: import org.w3c.dom.Document;
rrenkert@8251: import org.w3c.dom.Element;
rrenkert@8251: 
rrenkert@8251: import static org.dive4elements.river.exports.injector.InjectorConstants.CURRENT_KM;
rrenkert@8251: import static org.dive4elements.river.exports.injector.InjectorConstants.GAUGE_EPSILON;;
rrenkert@8251: 
rrenkert@8251: 
rrenkert@8251: public class DischargeInjector
rrenkert@8251: implements ContextInjector
rrenkert@8251: {
rrenkert@8251: 
rrenkert@8251:     private static Logger log = Logger.getLogger(DischargeInjector.class);
rrenkert@8251: 
rrenkert@8251:     @Override
rrenkert@8251:     public void setup(Element cfg) {
rrenkert@8251:     }
rrenkert@8251: 
rrenkert@8251:     @Override
rrenkert@8251:     public void injectContext(CallContext ctx, Artifact artifact, Document doc) {
rrenkert@8251:         RangeAccess access = new RangeAccess((D4EArtifact)artifact);
rrenkert@8251:         double km = access.getFrom();
rrenkert@8251:         Gauge gauge = access.getRiver().determineGaugeByStation(
rrenkert@8251:             km - GAUGE_EPSILON, km + GAUGE_EPSILON);
rrenkert@8251:         if (gauge == null) {
rrenkert@8251:             log.error("No Gauge could be found at station " + km + "!");
rrenkert@8251:             return;
rrenkert@8251:         }
rrenkert@8251:         ctx.putContextValue(CURRENT_KM, km);
rrenkert@8251:     }
rrenkert@8251: 
rrenkert@8251: }