Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MeasurementStationInfoService.java @ 4246:cac0878b4a92
Add a service to return measurement stations of a river
The new service returns an xml representation of the measurement stations on a
river.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Wed, 24 Oct 2012 15:57:48 +0200 |
parents | |
children | 5da024c2af62 |
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package de.intevation.flys.artifacts.services; import java.math.BigDecimal; import java.util.List; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.GlobalContext; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.model.RiverFactory; import de.intevation.flys.model.MeasurementStation; import de.intevation.flys.model.Range; import de.intevation.flys.model.River; /** * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a> */ public class MeasurementStationInfoService extends FLYSService { private static final Logger logger = Logger.getLogger( GaugeOverviewInfoService.class); public static final String RIVER_XPATH = "/art:river/text()"; @Override public Document doProcess( Document data, GlobalContext globalContext, CallMeta callMeta ) { logger.debug("MeasurementStationInfoService.process"); String riverstr = XMLUtils.xpathString( data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); River river = RiverFactory.getRiver(riverstr); Document result = XMLUtils.newDocument(); if (river == null) { logger.warn("No river with name " + riverstr + " found."); return result; } XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( result, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); Element go = ec.create("masurement-station-info"); double[] minmax = river.determineMinMaxDistance(); double[] minmaxq = river.determineMinMaxQ(); Element r = ec.create("river"); ec.addAttr(r, "name", river.getName(), true); ec.addAttr(r, "start", Double.toString(minmax[0]), true); ec.addAttr(r, "end", Double.toString(minmax[1]), true); ec.addAttr(r, "wstunit", river.getWstUnit().getName(), true); ec.addAttr(r, "kmup", Boolean.toString(river.getKmUp()), true); ec.addAttr(r, "minq", Double.toString(minmaxq[0]), true); ec.addAttr(r, "maxq", Double.toString(minmaxq[1]), true); ec.addAttr(r, "official", Long.toString(river.getOfficialNumber()), true); Element egs = ec.create("measurement-stations"); List<MeasurementStation> mstations = river.getMeasurementStations(); if (logger.isDebugEnabled()) { logger.debug("Loaded stations: " + mstations); } for (MeasurementStation mstation: mstations) { Element eg = ec.create("measurement-station"); String name = mstation.getName(); if (name != null) { ec.addAttr(eg, "name", name, true); } String type = mstation.getMeasurementType(); if (type != null) { ec.addAttr(eg, "type", type, true); } String riverside = mstation.getRiverside(); if (riverside != null) { ec.addAttr(eg, "riverside", riverside, true); } Double station = mstation.getStation(); if (station != null) { ec.addAttr(eg, "station", Double.toString(station), true); } Range range = mstation.getRange(); if (range != null) { BigDecimal a = range.getA(); if (a != null) { ec.addAttr(eg, "start", getStringValue(a), true); } BigDecimal b = range.getB(); if (b != null) { ec.addAttr(eg, "end", getStringValue(b), true); } } egs.appendChild(eg); } go.appendChild(r); go.appendChild(egs); result.appendChild(go); return result; } /** * Returns a Double as String from a BigDecimal value. * * If value is null an empty String is returned. */ private static String getStringValue(BigDecimal value) { return value != null ? Double.toString(value.doubleValue()) : ""; } }