1 | /* WRS 2.0 |
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2 | * Copyright (C) 2009 Anton Patrushev |
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3 | * |
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4 | * This program is free software; you can redistribute it and/or modify |
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5 | * it under the terms of the GNU General Public License as published by |
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6 | * the Free Software Foundation; either version 3 of the License, or |
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7 | * (at your option) any later version. |
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8 | * |
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9 | * This program is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | * GNU General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU General Public License |
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15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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16 | */ |
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17 | |
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18 | package handler; |
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19 | |
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20 | import java.util.ArrayList; |
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21 | import java.util.HashMap; |
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22 | |
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23 | import org.geotools.geometry.jts.JTS; |
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24 | import org.geotools.referencing.CRS; |
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25 | |
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26 | import org.opengis.geometry.MismatchedDimensionException; |
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27 | import org.opengis.referencing.FactoryException; |
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28 | import org.opengis.referencing.NoSuchAuthorityCodeException; |
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29 | import org.opengis.referencing.crs.CoordinateReferenceSystem; |
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30 | import org.opengis.referencing.operation.MathTransform; |
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31 | import org.opengis.referencing.operation.TransformException; |
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32 | |
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33 | import com.vividsolutions.jts.geom.Geometry; |
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34 | import com.vividsolutions.jts.io.ParseException; |
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35 | import com.vividsolutions.jts.io.WKTReader; |
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36 | |
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37 | import exception.InvalidServiceException; |
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38 | import geometry.Point; |
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39 | |
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40 | import model.Resource; |
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41 | import model.Service; |
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42 | import util.IOHelper; |
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43 | import util.Log; |
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44 | import util.Parameter; |
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45 | import util.ServiceRequest; |
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46 | |
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47 | public abstract class ResourceHandler |
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48 | { |
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49 | protected enum DataTypes |
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50 | { |
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51 | STRING, INTEGER, DOUBLE, GEOMETRY, BOOLEAN; |
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52 | } |
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53 | |
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54 | protected enum AggregateTypes |
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55 | { |
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56 | MAX, MIN, AVG, SUM, COUNT; |
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57 | } |
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58 | |
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59 | public abstract void setResource(Resource resource); |
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60 | |
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61 | public abstract boolean checkService(Service service); |
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62 | |
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63 | public ArrayList<HashMap<String, Parameter>> handle(ServiceRequest request, |
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64 | Log log) throws InvalidServiceException |
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65 | { |
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66 | if (checkService(request.getService())) |
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67 | { |
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68 | return handleRequest(request, log); |
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69 | } |
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70 | else |
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71 | { |
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72 | throw new InvalidServiceException(request.getService().getName()); |
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73 | } |
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74 | } |
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75 | |
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76 | protected abstract ArrayList<HashMap<String, Parameter>> handleRequest( |
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77 | ServiceRequest request, Log log); |
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78 | |
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79 | public abstract String fillQueryTemplate(String template, Service service, |
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80 | HashMap<String, Parameter> parameters); |
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81 | |
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82 | public abstract ArrayList<Point> parseGeometry(String geometry); |
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83 | |
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84 | public String[] transformPoint(String x, String y, String srid_in, String srid_out) throws NoSuchAuthorityCodeException, FactoryException, ParseException, MismatchedDimensionException, TransformException |
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85 | { |
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86 | CoordinateReferenceSystem sourceCRS = CRS.decode(srid_in); |
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87 | CoordinateReferenceSystem targetCRS = CRS.decode(srid_out); |
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88 | MathTransform transform = CRS.findMathTransform(sourceCRS, targetCRS, true); |
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89 | |
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90 | Geometry point = new WKTReader().read("POINT ("+x+" "+y+")"); |
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91 | Geometry targetPoint = JTS.transform(point, transform); |
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92 | |
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93 | String[] result = {IOHelper.FORMATTER.format(targetPoint.getCoordinate().x), IOHelper.FORMATTER.format(targetPoint.getCoordinate().y)}; |
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94 | |
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95 | return result; |
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96 | } |
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97 | |
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98 | } |
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