raimund@3088: package de.intevation.flys.exports.fixings;
raimund@3088: 
raimund@3088: import org.w3c.dom.Element;
raimund@3088: import org.w3c.dom.Document;
raimund@3088: 
raimund@3088: import org.apache.log4j.Logger;
raimund@3088: 
raimund@3088: import java.io.OutputStream;
raimund@3088: 
raimund@3088: import javax.xml.xpath.XPathConstants;
raimund@3088: 
raimund@3088: import de.intevation.artifacts.ArtifactNamespaceContext;
raimund@3088: import de.intevation.artifacts.common.utils.XMLUtils;
raimund@3088: import de.intevation.artifacts.CallContext;
raimund@3088: 
raimund@3088: import de.intevation.flys.exports.XYChartGenerator;
raimund@3088: 
raimund@3088: public abstract class FixChartGenerator
raimund@3088: extends XYChartGenerator
raimund@3088: {
raimund@3088:     private static Logger logger = Logger.getLogger(FixChartGenerator.class);
raimund@3088: 
raimund@3088:     public static final String XPATH_CHART_CURRENTKM =
raimund@3088:         "/art:action/art:attributes/art:currentKm";
raimund@3088: 
raimund@3088: 
raimund@3088:     @Override
raimund@3088:     public void init(Document request, OutputStream out, CallContext context) {
raimund@3088:         super.init(request, out, context);
raimund@3088: 
raimund@3088:         logger.debug("currentKm = " + new Double(getCurrentKmFromRequest()));
raimund@3088:         context.putContextValue("currentKm", new Double(getCurrentKmFromRequest()));
raimund@3088:     }
raimund@3088: 
raimund@3088:     public double getCurrentKmFromRequest() {
raimund@3088:         Element km = (Element)XMLUtils.xpath(
raimund@3088:             request,
raimund@3088:             XPATH_CHART_CURRENTKM,
raimund@3088:             XPathConstants.NODE,
raimund@3088:             ArtifactNamespaceContext.INSTANCE);
raimund@3088: 
raimund@3088:         if (km == null) {
raimund@3088:             return -1d;
raimund@3088:         }
raimund@3088: 
raimund@3088:         String uri = ArtifactNamespaceContext.NAMESPACE_URI;
raimund@3088: 
raimund@3088:         String currentKm = km.getAttributeNS(uri, "km");
raimund@3088:         try {
raimund@3088:             double d = Double.valueOf(currentKm).doubleValue();
raimund@3088:             return d;
raimund@3088:         }
raimund@3088:         catch(NumberFormatException nfe) {
raimund@3088:             return -1d;
raimund@3088:         }
raimund@3088:     }
raimund@3088: }
raimund@3088: