svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / io / ShpFileHeader.java @ 4532
History | View | Annotate | Download (6.05 KB)
1 |
package org.cresques.io; |
---|---|
2 |
|
3 |
|
4 |
/*
|
5 |
* GISToolkit - Geographical Information System Toolkit
|
6 |
* (C) 2002, Ithaqua Enterprises Inc.
|
7 |
*
|
8 |
* This library is free software; you can redistribute it and/or
|
9 |
* modify it under the terms of the GNU Lesser General Public
|
10 |
* License as published by the Free Software Foundation;
|
11 |
* version 2.1 of the License.
|
12 |
*
|
13 |
* This library is distributed in the hope that it will be useful,
|
14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
16 |
* Lesser General Public License for more details.
|
17 |
*
|
18 |
* You should have received a copy of the GNU Lesser General Public
|
19 |
* License along with this library; if not, write to the Free Software
|
20 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
21 |
*
|
22 |
*/
|
23 |
import java.nio.*; |
24 |
|
25 |
|
26 |
/**
|
27 |
* Procesa la cabecera de un .shp
|
28 |
* @author "Luis W. Sevilla" <sevilla_lui@gva.es>* @author administrador
|
29 |
*/
|
30 |
public class ShpFileHeader { |
31 |
//}
|
32 |
|
33 |
/**
|
34 |
* Class to represent the header in the shape file.
|
35 |
*/
|
36 |
|
37 |
//public class ShapeFileHeader {
|
38 |
|
39 |
/**
|
40 |
* Shape Type
|
41 |
* Value Shape Type
|
42 |
* 0 Null Shape
|
43 |
* 1 Point
|
44 |
* 3 PolyLine
|
45 |
* 5 Polygon
|
46 |
* 8 MultiPoint
|
47 |
* 11 PointZ
|
48 |
* 13 PolyLineZ
|
49 |
* 15 PolygonZ
|
50 |
* 18 MultiPointZ
|
51 |
* 21 PointM
|
52 |
* 23 PolyLineM
|
53 |
* 25 PolygonM
|
54 |
* 28 MultiPointM
|
55 |
* 31 MultiPatch
|
56 |
*/
|
57 |
|
58 |
/* The null shape type, there is no shape for this record. */
|
59 |
public static final int SHAPE_NULL = 0; |
60 |
public static final int SHAPE_POINT = 1; |
61 |
public static final int SHAPE_POLYLINE = 3; |
62 |
public static final int SHAPE_POLYGON = 5; |
63 |
public static final int SHAPE_MULTIPOINT = 8; |
64 |
public static final int SHAPE_POINTZ = 11; |
65 |
public static final int SHAPE_POLYLINEZ = 13; |
66 |
public static final int SHAPE_POLYGONZ = 15; |
67 |
public static final int SHAPE_MULTIPOINTZ = 18; |
68 |
public static final int SHAPE_POINTM = 21; |
69 |
public static final int SHAPE_POLYLINEM = 23; |
70 |
public static final int SHAPE_POLYGONM = 25; |
71 |
public static final int SHAPE_MULTIPOINTM = 28; |
72 |
public static final int SHAPE_MULTIPATCH = 31; |
73 |
|
74 |
/**File Code, must be the value 9994*/
|
75 |
int myFileCode = 9994; |
76 |
|
77 |
/**
|
78 |
* Unused 1;
|
79 |
*/
|
80 |
int myUnused1 = 0; |
81 |
|
82 |
/**
|
83 |
* Unused 2;
|
84 |
*/
|
85 |
int myUnused2 = 0; |
86 |
|
87 |
/**
|
88 |
* Unused 3;
|
89 |
*/
|
90 |
int myUnused3 = 0; |
91 |
|
92 |
/**
|
93 |
* Unused 4;
|
94 |
*/
|
95 |
int myUnused4 = 0; |
96 |
|
97 |
/**
|
98 |
* Unused 5;
|
99 |
*/
|
100 |
int myUnused5 = 0; |
101 |
|
102 |
/**File Length;*/
|
103 |
int myFileLength = 0; |
104 |
|
105 |
/**Version of the file.*/
|
106 |
int myVersion = 1000; |
107 |
int myShapeType = 0; |
108 |
|
109 |
/**
|
110 |
* BoundingBox Xmin
|
111 |
*/
|
112 |
double myXmin = 0; |
113 |
|
114 |
/**
|
115 |
* BoundingBox Ymin
|
116 |
*/
|
117 |
double myYmin = 0; |
118 |
|
119 |
/**
|
120 |
* BoundingBox Xmax
|
121 |
*/
|
122 |
double myXmax = 0; |
123 |
|
124 |
/**
|
125 |
* BoundingBox Ymax
|
126 |
*/
|
127 |
double myYmax = 0; |
128 |
|
129 |
/**
|
130 |
* BoundingBox Zmin
|
131 |
*/
|
132 |
double myZmin = 0; |
133 |
|
134 |
/**
|
135 |
* BoundingBox Zmax
|
136 |
*/
|
137 |
double myZmax = 0; |
138 |
|
139 |
/**
|
140 |
* BoundingBox Zmin
|
141 |
*/
|
142 |
double myMmin = 0; |
143 |
|
144 |
/**
|
145 |
* BoundingBox Zmax
|
146 |
*/
|
147 |
double myMmax = 0; |
148 |
|
149 |
// notify about warnings.
|
150 |
private boolean myWarning = true; |
151 |
|
152 |
/**
|
153 |
* ShapeFileHeader constructor comment.
|
154 |
*/
|
155 |
public ShpFileHeader() {
|
156 |
super();
|
157 |
} |
158 |
|
159 |
/** Return the file code. */
|
160 |
public int getFileCode() { |
161 |
return myFileCode;
|
162 |
} |
163 |
|
164 |
/** Return the version of the file. */
|
165 |
public int getVersion() { |
166 |
return myVersion;
|
167 |
} |
168 |
|
169 |
/** Get the extents of the shape file. */
|
170 |
public java.awt.geom.Rectangle2D.Double getFileExtents() {
|
171 |
return new java.awt.geom.Rectangle2D.Double(myXmin, myYmin, |
172 |
myXmax - myXmin, |
173 |
myYmax - myYmin); |
174 |
} |
175 |
|
176 |
/** Print warnings to system.out. */
|
177 |
public void setWarnings(boolean inWarning) { |
178 |
myWarning = inWarning; |
179 |
} |
180 |
|
181 |
/**
|
182 |
* Return the length of the header in 16 bit words..
|
183 |
*/
|
184 |
public int getHeaderLength() { |
185 |
return 50; |
186 |
} |
187 |
|
188 |
/**
|
189 |
* Return the number of 16 bit words in the shape file as recorded in the header
|
190 |
*/
|
191 |
public int getFileLength() { |
192 |
return myFileLength;
|
193 |
} |
194 |
|
195 |
/**
|
196 |
* Read the header from the shape file.
|
197 |
*/
|
198 |
public void readHeader(ByteBuffer in) { |
199 |
// the first four bytes are integers
|
200 |
// in.setLittleEndianMode(false);
|
201 |
in.order(ByteOrder.BIG_ENDIAN);
|
202 |
myFileCode = in.getInt(); |
203 |
|
204 |
if (myFileCode != 9994) { |
205 |
warn("File Code = " + myFileCode + " Not equal to 9994"); |
206 |
} |
207 |
|
208 |
// From 4 to 8 are unused.
|
209 |
myUnused1 = in.getInt(); |
210 |
|
211 |
// From 8 to 12 are unused.
|
212 |
myUnused2 = in.getInt(); |
213 |
|
214 |
// From 12 to 16 are unused.
|
215 |
myUnused3 = in.getInt(); |
216 |
|
217 |
// From 16 to 20 are unused.
|
218 |
myUnused4 = in.getInt(); |
219 |
|
220 |
// From 20 to 24 are unused.
|
221 |
myUnused5 = in.getInt(); |
222 |
|
223 |
// From 24 to 28 are the file length.
|
224 |
myFileLength = in.getInt(); |
225 |
|
226 |
// From 28 to 32 are the File Version.
|
227 |
in.order(ByteOrder.LITTLE_ENDIAN);
|
228 |
myVersion = in.getInt(); |
229 |
|
230 |
// From 32 to 36 are the Shape Type.
|
231 |
myShapeType = in.getInt(); |
232 |
|
233 |
// From 36 to 44 are Xmin.
|
234 |
myXmin = in.getDouble(); // Double.longBitsToDouble(in.getLong());
|
235 |
|
236 |
// From 44 to 52 are Ymin.
|
237 |
myYmin = in.getDouble(); |
238 |
|
239 |
// From 52 to 60 are Xmax.
|
240 |
myXmax = in.getDouble(); |
241 |
|
242 |
// From 60 to 68 are Ymax.
|
243 |
myYmax = in.getDouble(); |
244 |
|
245 |
// From 68 to 76 are Zmin.
|
246 |
myZmin = in.getDouble(); |
247 |
|
248 |
// From 76 to 84 are Zmax.
|
249 |
myZmax = in.getDouble(); |
250 |
|
251 |
// From 84 to 92 are Mmin.
|
252 |
myMmin = in.getDouble(); |
253 |
|
254 |
// From 92 to 100 are Mmax.
|
255 |
myMmax = in.getDouble(); |
256 |
|
257 |
// that is all 100 bytes of the header.
|
258 |
} |
259 |
|
260 |
private void warn(String inWarn) { |
261 |
if (myWarning) {
|
262 |
System.out.print("WARNING: "); |
263 |
System.out.println(inWarn);
|
264 |
} |
265 |
} |
266 |
} |