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
History | View | Annotate | Download (4.8 KB)
1 |
/**
|
---|---|
2 |
* gvSIG. Desktop Geographic Information System.
|
3 |
*
|
4 |
* Copyright (C) 2007-2013 gvSIG Association.
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU General Public License
|
8 |
* as published by the Free Software Foundation; either version 3
|
9 |
* of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
19 |
* MA 02110-1301, USA.
|
20 |
*
|
21 |
* For any additional information, do not hesitate to contact us
|
22 |
* at info AT gvsig.com, or visit our website www.gvsig.com.
|
23 |
*/
|
24 |
package org.gvsig.fmap.dal.feature.impl; |
25 |
|
26 |
import java.util.Arrays; |
27 |
|
28 |
import org.gvsig.fmap.dal.DataTypes; |
29 |
import org.gvsig.fmap.dal.exception.DataException; |
30 |
import org.gvsig.fmap.dal.feature.AbstractFeatureStoreTransform; |
31 |
import org.gvsig.fmap.dal.feature.EditableFeature; |
32 |
import org.gvsig.fmap.dal.feature.EditableFeatureType; |
33 |
import org.gvsig.fmap.dal.feature.Feature; |
34 |
import org.gvsig.fmap.dal.feature.FeatureStore; |
35 |
import org.gvsig.fmap.dal.feature.FeatureType; |
36 |
import org.gvsig.fmap.dal.feature.exception.CreateGeometryException; |
37 |
import org.gvsig.fmap.geom.GeometryLocator; |
38 |
import org.gvsig.fmap.geom.GeometryManager; |
39 |
import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
40 |
import org.gvsig.fmap.geom.Geometry.TYPES; |
41 |
import org.gvsig.fmap.geom.primitive.Point; |
42 |
import org.gvsig.tools.persistence.PersistentState; |
43 |
import org.gvsig.tools.persistence.exception.PersistenceException; |
44 |
|
45 |
/**
|
46 |
*
|
47 |
* This transform adds a new attribute of type Geometry to the original store's
|
48 |
* default FeatureType. When applying the transform to a single feature this new
|
49 |
* attribute is assigned the value of a point whose coordinates proceed from two
|
50 |
* numeric attributes from the store, called xname, yname.
|
51 |
*
|
52 |
*/
|
53 |
class MyTransform extends AbstractFeatureStoreTransform { |
54 |
|
55 |
private FeatureType originalType;
|
56 |
private String geomName; |
57 |
private String xname; |
58 |
private String yname; |
59 |
|
60 |
/**
|
61 |
* Empty default constructor
|
62 |
*/
|
63 |
public MyTransform() {
|
64 |
} |
65 |
|
66 |
/**
|
67 |
* Initializes the transform by assigning the source store and the names of
|
68 |
* the necessary attributes.
|
69 |
*
|
70 |
* @param store
|
71 |
* source store.
|
72 |
*
|
73 |
* @param geomName
|
74 |
* name of the geometry attribute in the default feature type
|
75 |
* from the source store.
|
76 |
*
|
77 |
* @param xname
|
78 |
* name of the attribute containing the X coordinates
|
79 |
*
|
80 |
* @param yname
|
81 |
* name of the attribute containing the Y coordinates
|
82 |
*
|
83 |
* @throws DataException
|
84 |
*/
|
85 |
public void initialize(FeatureStore store, String geomName, String xname, String yname) throws DataException { |
86 |
|
87 |
// Initialize some data
|
88 |
this.setFeatureStore(store);
|
89 |
this.geomName = geomName;
|
90 |
this.xname = xname;
|
91 |
this.yname = yname;
|
92 |
|
93 |
this.originalType = store.getDefaultFeatureType();
|
94 |
// obtain the feature type, add the new attribute and keep a reference to the resulting feature type
|
95 |
EditableFeatureType type = store.getDefaultFeatureType().getEditable(); |
96 |
type.add(geomName, DataTypes.GEOMETRY); |
97 |
FeatureType[] types = new FeatureType[] { type.getNotEditableCopy() }; |
98 |
setFeatureTypes(Arrays.asList(types), types[0]); |
99 |
} |
100 |
|
101 |
/**
|
102 |
* Applies this transform to a target editable feature, using data from the
|
103 |
* source feature.
|
104 |
*/
|
105 |
public void applyTransform(Feature source, EditableFeature target) |
106 |
throws DataException {
|
107 |
|
108 |
// copy source feature data over target feature
|
109 |
target.copyFrom(source); |
110 |
|
111 |
// calculate and assign new attribute's value
|
112 |
GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
113 |
Point point;
|
114 |
try {
|
115 |
point = (Point)geomManager.create(TYPES.POINT, SUBTYPES.GEOM2D);
|
116 |
point.setX(source.getDouble(xname)); |
117 |
point.setY(source.getDouble(yname)); |
118 |
target.setGeometry(this.geomName, point);
|
119 |
} catch (org.gvsig.fmap.geom.exception.CreateGeometryException e) {
|
120 |
throw new CreateGeometryException(TYPES.POINT, SUBTYPES.GEOM2D, e); |
121 |
} |
122 |
} |
123 |
|
124 |
public void saveToState(PersistentState state) throws PersistenceException { |
125 |
state.set("geomName", this.geomName); |
126 |
state.set("xname", this.xname); |
127 |
state.set("yname", this.yname); |
128 |
} |
129 |
|
130 |
public void loadFromState(PersistentState state) throws PersistenceException { |
131 |
} |
132 |
|
133 |
/*
|
134 |
* (non-Javadoc)
|
135 |
*
|
136 |
* @see
|
137 |
* org.gvsig.fmap.dal.feature.FeatureStoreTransform#getSourceFeatureTypeFrom
|
138 |
* (org.gvsig.fmap.dal.feature.FeatureType)
|
139 |
*/
|
140 |
public FeatureType getSourceFeatureTypeFrom(FeatureType targetFeatureType) {
|
141 |
return originalType;
|
142 |
} |
143 |
|
144 |
public boolean isTransformsOriginalValues() { |
145 |
return false; |
146 |
} |
147 |
|
148 |
} |