svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.dbf / src / main / java / org / gvsig / fmap / dal / store / dbf / MyTransform.java @ 40435
History | View | Annotate | Download (4.59 KB)
1 |
/* gvSIG. Geographic Information System of the Valencian Government
|
---|---|
2 |
*
|
3 |
* Copyright (C) 2007-2008 Infrastructures and Transports Department
|
4 |
* of the Valencian Government (CIT)
|
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 2
|
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 |
*/
|
22 |
|
23 |
/*
|
24 |
* AUTHORS (In addition to CIT):
|
25 |
* 2009 IVER T.I {{Task}}
|
26 |
*/
|
27 |
|
28 |
package org.gvsig.fmap.dal.store.dbf; |
29 |
|
30 |
import java.util.ArrayList; |
31 |
import java.util.List; |
32 |
|
33 |
import org.gvsig.fmap.dal.DataTypes; |
34 |
import org.gvsig.fmap.dal.exception.DataException; |
35 |
import org.gvsig.fmap.dal.exception.ReadException; |
36 |
import org.gvsig.fmap.dal.feature.AbstractFeatureStoreTransform; |
37 |
import org.gvsig.fmap.dal.feature.EditableFeature; |
38 |
import org.gvsig.fmap.dal.feature.EditableFeatureType; |
39 |
import org.gvsig.fmap.dal.feature.Feature; |
40 |
import org.gvsig.fmap.dal.feature.FeatureStore; |
41 |
import org.gvsig.fmap.dal.feature.FeatureType; |
42 |
import org.gvsig.fmap.geom.Geometry; |
43 |
import org.gvsig.fmap.geom.GeometryLocator; |
44 |
import org.gvsig.fmap.geom.GeometryManager; |
45 |
import org.gvsig.fmap.geom.exception.CreateGeometryException; |
46 |
import org.gvsig.tools.persistence.PersistentState; |
47 |
import org.gvsig.tools.persistence.exception.PersistenceException; |
48 |
|
49 |
public class MyTransform extends AbstractFeatureStoreTransform { |
50 |
|
51 |
private String geomName; |
52 |
private String xname; |
53 |
private String yname; |
54 |
|
55 |
private GeometryManager geomManager;
|
56 |
|
57 |
/**
|
58 |
* A default constructor with out parameters
|
59 |
*/
|
60 |
public MyTransform() {
|
61 |
this.geomManager = GeometryLocator.getGeometryManager();
|
62 |
|
63 |
} |
64 |
|
65 |
/**
|
66 |
* Initializes the transform by assigning the source store and the names of
|
67 |
* the necessary attributes.
|
68 |
*
|
69 |
* @param store
|
70 |
* source store.
|
71 |
*
|
72 |
* @param geomName
|
73 |
* name of the geometry attribute in the default feature type
|
74 |
* from the source store.
|
75 |
*
|
76 |
* @param xname
|
77 |
* name of the attribute containing the X coordinates
|
78 |
*
|
79 |
* @param yname
|
80 |
* name of the attribute containing the Y coordinates
|
81 |
*
|
82 |
* @throws DataException
|
83 |
*/
|
84 |
public MyTransform initialize(FeatureStore store, String geomName, |
85 |
String xname, String yname) throws DataException { |
86 |
|
87 |
// Initialize some data
|
88 |
setFeatureStore(store); |
89 |
this.geomName = geomName;
|
90 |
this.xname = xname;
|
91 |
this.yname = yname;
|
92 |
|
93 |
// obtain the feature type, add the new attribute
|
94 |
// and keep a reference to the
|
95 |
// resulting feature type
|
96 |
EditableFeatureType type = getFeatureStore().getDefaultFeatureType() |
97 |
.getEditable(); |
98 |
type.add(geomName, DataTypes.GEOMETRY); |
99 |
List list = new ArrayList(1); |
100 |
list.add(type.getNotEditableCopy()); |
101 |
setFeatureTypes(list, (FeatureType) list.get(0));
|
102 |
return this; |
103 |
} |
104 |
|
105 |
/**
|
106 |
* Applies this transform to a target editable feature, using data from the
|
107 |
* source feature.
|
108 |
*/
|
109 |
public void applyTransform(Feature source, EditableFeature target) |
110 |
throws DataException {
|
111 |
|
112 |
// copy source feature data over target feature
|
113 |
target.copyFrom(source); |
114 |
|
115 |
// calculate and assign new attribute's value
|
116 |
Geometry geom; |
117 |
try {
|
118 |
geom = geomManager.createPoint(source.getDouble(xname), source |
119 |
.getDouble(yname), Geometry.SUBTYPES.GEOM2D); |
120 |
} catch (CreateGeometryException e) {
|
121 |
throw new ReadException("XYTranform", e); |
122 |
} |
123 |
target.setGeometry(this.geomName, geom);
|
124 |
} |
125 |
|
126 |
|
127 |
public void saveToState(PersistentState state) throws PersistenceException { |
128 |
state.set("xname", xname);
|
129 |
state.set("yname", yname);
|
130 |
state.set("geomName", geomName);
|
131 |
} |
132 |
|
133 |
public void loadFromState(PersistentState state) |
134 |
throws PersistenceException {
|
135 |
this.xname = state.getString("xname"); |
136 |
this.yname = state.getString("yname"); |
137 |
this.geomName = state.getString("geomName"); |
138 |
} |
139 |
|
140 |
/**
|
141 |
* Returns the FeatureType to use to get data from original store
|
142 |
*/
|
143 |
public FeatureType getSourceFeatureTypeFrom(FeatureType targetFeatureType) {
|
144 |
EditableFeatureType ed = targetFeatureType.getEditable(); |
145 |
ed.remove(this.geomName);
|
146 |
return ed.getNotEditableCopy();
|
147 |
} |
148 |
|
149 |
/**
|
150 |
* Informs that original values of store don't will be modified
|
151 |
*/
|
152 |
public boolean isTransformsOriginalValues() { |
153 |
return false; |
154 |
} |
155 |
|
156 |
} |