ingo@1095: package de.intevation.flys.utils;
ingo@1095: 
ingo@1105: import java.util.HashMap;
ingo@1105: import java.util.Map;
ingo@1105: 
ingo@1105: import javax.xml.xpath.XPathConstants;
ingo@1105: 
ingo@1105: import org.w3c.dom.Document;
ingo@1105: 
ingo@1095: import gnu.trove.TDoubleArrayList;
ingo@1095: 
ingo@1105: import de.intevation.artifacts.common.utils.Config;
ingo@1105: import de.intevation.artifacts.common.utils.XMLUtils;
ingo@1105: 
ingo@1095: import de.intevation.flys.artifacts.FLYSArtifact;
felix@1099: import de.intevation.flys.artifacts.model.RiverFactory;
felix@1099: import de.intevation.flys.model.River;
ingo@1095: 
ingo@1095: public class FLYSUtils {
ingo@1095: 
ingo@1095:     public static enum KM_MODE { RANGE, LOCATIONS, NONE };
ingo@1095: 
ingo@1105:     public static final String XPATH_RIVER_PROJECTION =
ingo@1105:         "/artifact-database/floodmap/river[@name=$name]/srid/@value";
ingo@1105: 
ingo@1095: 
ingo@1095:     private FLYSUtils() {
ingo@1095:     }
ingo@1095: 
ingo@1095: 
ingo@1095:     public static KM_MODE getKmRangeMode(FLYSArtifact flys) {
felix@1099:         String mode = flys.getDataAsString("ld_mode");
ingo@1095: 
ingo@1095:         if (mode == null || mode.length() == 0) {
ingo@1095:             return KM_MODE.NONE;
ingo@1095:         }
ingo@1095:         else if (mode.equals("distance"))  {
ingo@1095:             return KM_MODE.RANGE;
ingo@1095:         }
ingo@1095:         else if (mode.equals("locations")) {
ingo@1095:             return KM_MODE.LOCATIONS;
ingo@1095:         }
ingo@1095:         else {
ingo@1095:             return KM_MODE.NONE;
ingo@1095:         }
ingo@1095:     }
ingo@1095: 
ingo@1095: 
ingo@1095:     public static double[] getKmRange(FLYSArtifact flys) {
ingo@1095:         switch (getKmRangeMode(flys)) {
ingo@1095:             case RANGE: {
ingo@1095:                 return getKmFromTo(flys);
ingo@1095:             }
ingo@1095: 
ingo@1095:             case LOCATIONS: {
ingo@1095:                 double[] locs = getLocations(flys);
ingo@1095:                 return new double[] { locs[0], locs[locs.length-1] };
ingo@1095:             }
ingo@1095: 
ingo@1095:             case NONE: {
ingo@1095:                 double[] locs = getLocations(flys);
ingo@1095:                 if (locs != null) {
ingo@1095:                     return new double[] { locs[0], locs[locs.length-1] };
ingo@1095:                 }
ingo@1095:                 else {
ingo@1095:                     return getKmFromTo(flys);
ingo@1095:                 }
ingo@1095:             }
ingo@1095:         }
ingo@1095: 
ingo@1095:         return new double[] { Double.NaN, Double.NaN };
ingo@1095:     }
ingo@1095: 
ingo@1095: 
ingo@1095:     public static double[] getKmFromTo(FLYSArtifact flys) {
ingo@1095:         String strFrom = flys.getDataAsString("ld_from");
ingo@1095:         String strTo   = flys.getDataAsString("ld_to");
ingo@1095: 
ingo@1095:         if (strFrom == null || strTo == null) {
ingo@1095:             return null;
ingo@1095:         }
ingo@1095: 
ingo@1095:         try {
ingo@1095:             return new double[] {
ingo@1095:                 Double.parseDouble(strFrom),
ingo@1095:                 Double.parseDouble(strTo) };
ingo@1095:         }
ingo@1095:         catch (NumberFormatException nfe) {
ingo@1095:             return null;
ingo@1095:         }
ingo@1095:     }
ingo@1095: 
ingo@1095: 
ingo@1095:     public static double[] getLocations(FLYSArtifact flys) {
ingo@1095:         String locationStr = flys.getDataAsString("ld_locations");
ingo@1095: 
ingo@1095:         if (locationStr == null || locationStr.length() == 0) {
ingo@1095:             return null;
ingo@1095:         }
ingo@1095: 
ingo@1095:         String[] tmp               = locationStr.split(" ");
ingo@1095:         TDoubleArrayList locations = new TDoubleArrayList();
ingo@1095: 
ingo@1095:         for (String l: tmp) {
ingo@1095:             try {
ingo@1095:                 locations.add(Double.parseDouble(l));
ingo@1095:             }
ingo@1095:             catch (NumberFormatException nfe) {
ingo@1095:             }
ingo@1095:         }
ingo@1095: 
ingo@1095:         locations.sort();
ingo@1095: 
ingo@1095:         return locations.toNativeArray();
ingo@1095:     }
felix@1099: 
felix@1099: 
felix@1099:     /**
felix@1099:      * Returns the selected River object based on the 'river' data that might
felix@1099:      * have been inserted by the user.
felix@1099:      *
felix@1099:      * @return the selected River or null if no river has been chosen yet.
felix@1099:      */
felix@1099:     public static River getRiver(FLYSArtifact flys) {
felix@1099:         String sRiver = flys.getDataAsString("river");
felix@1099: 
felix@1099:         return (sRiver != null)
felix@1099:             ? RiverFactory.getRiver(sRiver)
felix@1099:             : null;
felix@1099:     }
ingo@1105: 
ingo@1105: 
ingo@1105:     /**
ingo@1105:      * Extracts the SRID defined in the global configuration for the river
ingo@1105:      * specified in <i>artifact</i>.
ingo@1105:      *
ingo@1105:      * @param artifact The FLYSArtifact that stores the name of the river.
ingo@1105:      *
ingo@1105:      * @return the SRID as string (e.g. "31466").
ingo@1105:      */
ingo@1105:     public static String getRiverSrid(FLYSArtifact artifact) {
ingo@1105:         String river = artifact.getDataAsString("river");
ingo@1105: 
ingo@1105:         if (river == null || river.length() == 0) {
ingo@1105:             return null;
ingo@1105:         }
ingo@1105: 
ingo@1105:         Map<String, String> variables = new HashMap<String, String>(1);
ingo@1105:         variables.put("name", river);
ingo@1105: 
ingo@1105:         Document cfg = Config.getConfig();
ingo@1105: 
ingo@1105:         return (String) XMLUtils.xpath(
ingo@1105:             cfg,
ingo@1105:             XPATH_RIVER_PROJECTION,
ingo@1105:             XPathConstants.STRING,
ingo@1105:             null,
ingo@1105:             variables);
ingo@1105:     }
ingo@1095: }
ingo@1105: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :