Mercurial > dive4elements > gnv-client
view gnv-artifacts/src/main/java/de/intevation/gnv/state/CoordinateSelectionState.java @ 1106:8ce8979f51df
Added the transition chain for the external mapviewer call (issue318).
gnv-artifacts/trunk@1237 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Tue, 29 Jun 2010 07:09:13 +0000 |
parents | 05bf8534a35a |
children | f953c9a559d8 |
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package de.intevation.gnv.state; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.List; import org.apache.log4j.Logger; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import com.vividsolutions.jts.geom.Point; import de.intevation.artifactdatabase.Config; import de.intevation.gnv.geobackend.base.Result; import de.intevation.gnv.state.describedata.DefaultKeyValueDescribeData; import de.intevation.gnv.state.describedata.KeyValueDescibeData; import de.intevation.gnv.state.describedata.NamedArrayList; import de.intevation.gnv.state.describedata.NamedCollection; import de.intevation.gnv.utils.ArtifactXMLUtilities; import de.intevation.gnv.utils.InputValidator; import de.intevation.gnv.utils.WKTUtils; import de.intevation.gnv.utils.exception.ValidationException; /** * This state handles coordinate input by the user. It searches database results * for coordinates and turns them into a human readable form. * * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> * */ public class CoordinateSelectionState extends StateBase { /** * the logger, used to log exceptions and additonaly information */ private static Logger log = Logger.getLogger(CoordinateSelectionState.class); /** * The UID of this Class */ private static final long serialVersionUID = 6318923553625195063L; /** * XPATH Expressions for the setup. */ private final static String MESH_WIDTH_XPATH = "mesh-width"; private final static String XLINK_XPATH = "xlink:href"; private final static String MESH_LIST_XPATH = "/mesh-widths/mesh"; private final static String ID_XPATH = "id"; private final static String WIDTH_VALUE_XPATH = "width"; /** * Holds all given Widths between two MeshPoints for different Meshes. */ private HashMap<String, Double> meshWidths = null; /** * Constructor */ public CoordinateSelectionState() { super(); } @Override protected List<Object> purifyResult(Collection<Result> result, String uuid) { log.debug("CoordinateSelectionState.purifyResult"); List<Object> describeData = new ArrayList<Object>(); NamedCollection<KeyValueDescibeData> keyValueDescibeData = extractKVP(result, "FEATUREID", "SHAPE"); describeData.add(keyValueDescibeData); return describeData; } @Override protected String prepareInputData4RegionDBQuery(String value) { log.debug("CoordinateSelectionState.prepareInputData4RegionDBQuery"); double distance=0.; String returnValue = null; try { Point center = InputValidator.getPointValue(value); String meshId = super.inputData.get("meshid").getValue(); int segments = 97; if (meshWidths != null){ Double distanceValue = this.meshWidths.get(meshId); if (distanceValue != null){ log.debug("User "+distanceValue+" as Buffer around given Point"); distance = distanceValue.doubleValue(); }else{ log.warn("No distance is configured for Mesh with id"+ meshId); } }else{ log.warn("No MeshWidth configured. Check if this is correct."); } returnValue = center.buffer(distance,segments).toText(); } catch (NumberFormatException e) { log.error(e,e); } catch (ValidationException e) { log.error(e,e); } return returnValue; } @Override protected NamedCollection<KeyValueDescibeData> extractKVP( Collection<Result> result, String keyid, String valueid) { Iterator<Result> rit = result.iterator(); NamedCollection<KeyValueDescibeData> keyValueDescibeData = new NamedArrayList<KeyValueDescibeData>( this.dataName, result.size()); keyValueDescibeData.setMultiSelect(this.dataMultiSelect); String prevKey = null; while (rit.hasNext()) { Result resultValue = rit.next(); String key = resultValue.getString(keyid); if(prevKey == null || !prevKey.equals(key)){ // TODO: FIXME: We have to do that because the arcsde does not support a distinct Query on Layers String geomString = CoordinateSelectionState.convert2DisplayCoordinate(resultValue.getString(valueid)); String value = geomString; if (resultValue.getResultDescriptor().getColumnIndex("VALUE") > 0){ value = resultValue.getString("VALUE") + " - "+value; } keyValueDescibeData.add(new DefaultKeyValueDescribeData(key,value )); } prevKey = key; } return keyValueDescibeData; } /** * Turn coordinate into a human readable format. * * @param wkt Coordinate as wkt string. * @return formatted coordinate. */ protected static String convert2DisplayCoordinate(String wkt){ return WKTUtils.toText(wkt); } @Override public void setup(Node configuration) { super.setup(configuration); Element widthElement = (Element)Config.getNodeXPath(configuration, MESH_WIDTH_XPATH); if (widthElement != null){ String fileName = widthElement.getAttribute(XLINK_XPATH); fileName = Config.replaceConfigDir(fileName); Node configurationNode = new ArtifactXMLUtilities().readConfiguration(fileName); NodeList meshNodes = Config.getNodeSetXPath(configurationNode,MESH_LIST_XPATH ); if (meshNodes != null){ meshWidths = new HashMap<String, Double>(meshNodes.getLength()); for (int i = 0; i < meshNodes.getLength(); i++){ Element meshNode = (Element)meshNodes.item(i); String id = meshNode.getAttribute(ID_XPATH); Double value = Double.parseDouble(meshNode.getAttribute(WIDTH_VALUE_XPATH)); meshWidths.put(id, value); } } }else{ log.warn("No Mesh Width defined."); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :