svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.impl / src / test / java / org / gvsig / fmap / dal / feature / impl / MyTransform.java @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | *
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4 | * Copyright (C) 2007-2013 gvSIG Association.
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5 | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | * as published by the Free Software Foundation; either version 3
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9 | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | *
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21 | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | */
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24 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature.impl; |
25 | |||
26 | import java.util.Arrays; |
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27 | |||
28 | import org.gvsig.fmap.dal.DataTypes; |
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29 | import org.gvsig.fmap.dal.exception.DataException; |
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30 | import org.gvsig.fmap.dal.feature.AbstractFeatureStoreTransform; |
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31 | import org.gvsig.fmap.dal.feature.EditableFeature; |
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32 | import org.gvsig.fmap.dal.feature.EditableFeatureType; |
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33 | import org.gvsig.fmap.dal.feature.Feature; |
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34 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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35 | import org.gvsig.fmap.dal.feature.FeatureType; |
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36 | import org.gvsig.fmap.dal.feature.exception.CreateGeometryException; |
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37 | import org.gvsig.fmap.geom.GeometryLocator; |
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38 | import org.gvsig.fmap.geom.GeometryManager; |
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39 | import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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40 | import org.gvsig.fmap.geom.Geometry.TYPES; |
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41 | import org.gvsig.fmap.geom.primitive.Point; |
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42 | import org.gvsig.tools.persistence.PersistentState; |
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43 | import org.gvsig.tools.persistence.exception.PersistenceException; |
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44 | |||
45 | /**
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46 | *
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47 | * This transform adds a new attribute of type Geometry to the original store's
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48 | * default FeatureType. When applying the transform to a single feature this new
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49 | * attribute is assigned the value of a point whose coordinates proceed from two
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50 | * numeric attributes from the store, called xname, yname.
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51 | *
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52 | */
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53 | class MyTransform extends AbstractFeatureStoreTransform { |
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54 | |||
55 | private FeatureType originalType;
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56 | private String geomName; |
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57 | private String xname; |
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58 | private String yname; |
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59 | |||
60 | /**
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61 | * Empty default constructor
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62 | */
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63 | public MyTransform() {
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64 | } |
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65 | |||
66 | /**
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67 | * Initializes the transform by assigning the source store and the names of
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68 | * the necessary attributes.
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69 | *
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70 | * @param store
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71 | * source store.
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72 | *
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73 | * @param geomName
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74 | * name of the geometry attribute in the default feature type
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75 | * from the source store.
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76 | *
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77 | * @param xname
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78 | * name of the attribute containing the X coordinates
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79 | *
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80 | * @param yname
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81 | * name of the attribute containing the Y coordinates
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82 | *
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83 | * @throws DataException
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84 | */
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85 | public void initialize(FeatureStore store, String geomName, String xname, String yname) throws DataException { |
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86 | |||
87 | // Initialize some data
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88 | this.setFeatureStore(store);
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89 | this.geomName = geomName;
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90 | this.xname = xname;
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91 | this.yname = yname;
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92 | |||
93 | this.originalType = store.getDefaultFeatureType();
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94 | // obtain the feature type, add the new attribute and keep a reference to the resulting feature type
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95 | EditableFeatureType type = store.getDefaultFeatureType().getEditable(); |
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96 | type.add(geomName, DataTypes.GEOMETRY); |
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97 | FeatureType[] types = new FeatureType[] { type.getNotEditableCopy() }; |
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98 | setFeatureTypes(Arrays.asList(types), types[0]); |
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99 | } |
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100 | |||
101 | /**
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102 | * Applies this transform to a target editable feature, using data from the
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103 | * source feature.
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104 | */
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105 | public void applyTransform(Feature source, EditableFeature target) |
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106 | throws DataException {
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107 | |||
108 | // copy source feature data over target feature
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109 | target.copyFrom(source); |
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110 | |||
111 | // calculate and assign new attribute's value
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112 | GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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113 | Point point;
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114 | try {
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115 | point = (Point)geomManager.create(TYPES.POINT, SUBTYPES.GEOM2D);
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116 | point.setX(source.getDouble(xname)); |
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117 | point.setY(source.getDouble(yname)); |
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118 | target.setGeometry(this.geomName, point);
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119 | } catch (org.gvsig.fmap.geom.exception.CreateGeometryException e) {
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120 | throw new CreateGeometryException(TYPES.POINT, SUBTYPES.GEOM2D, e); |
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121 | } |
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122 | } |
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123 | |||
124 | public void saveToState(PersistentState state) throws PersistenceException { |
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125 | state.set("geomName", this.geomName); |
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126 | state.set("xname", this.xname); |
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127 | state.set("yname", this.yname); |
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128 | } |
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129 | |||
130 | public void loadFromState(PersistentState state) throws PersistenceException { |
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131 | } |
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132 | |||
133 | /*
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134 | * (non-Javadoc)
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135 | *
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136 | * @see
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137 | * org.gvsig.fmap.dal.feature.FeatureStoreTransform#getSourceFeatureTypeFrom
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138 | * (org.gvsig.fmap.dal.feature.FeatureType)
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139 | */
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140 | public FeatureType getSourceFeatureTypeFrom(FeatureType targetFeatureType) {
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141 | return originalType;
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142 | } |
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143 | |||
144 | public boolean isTransformsOriginalValues() { |
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145 | return false; |
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146 | } |
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147 | |||
148 | } |