svn-gvsig-desktop / tags / v1_0_RELEASE / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / shp / DbaseFileWriterNIO.java @ 9167
History | View | Annotate | Download (11.8 KB)
1 | 377 | fjp | /*
|
---|---|---|---|
2 | * Geotools - OpenSource mapping toolkit
|
||
3 | * (C) 2002, Centre for Computational Geography
|
||
4 | *
|
||
5 | * This library is free software; you can redistribute it and/or
|
||
6 | * modify it under the terms of the GNU Lesser General Public
|
||
7 | * License as published by the Free Software Foundation;
|
||
8 | * version 2.1 of the License.
|
||
9 | *
|
||
10 | * This library is distributed in the hope that it will be useful,
|
||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
13 | * Lesser General Public License for more details.
|
||
14 | *
|
||
15 | * You should have received a copy of the GNU Lesser General Public
|
||
16 | * License along with this library; if not, write to the Free Software
|
||
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
18 | *
|
||
19 | * This file is based on an origional contained in the GISToolkit project:
|
||
20 | * http://gistoolkit.sourceforge.net/
|
||
21 | *
|
||
22 | */
|
||
23 | 1100 | fjp | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
|
24 | *
|
||
25 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
|
||
26 | *
|
||
27 | * This program is free software; you can redistribute it and/or
|
||
28 | * modify it under the terms of the GNU General Public License
|
||
29 | * as published by the Free Software Foundation; either version 2
|
||
30 | * of the License, or (at your option) any later version.
|
||
31 | *
|
||
32 | * This program is distributed in the hope that it will be useful,
|
||
33 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
34 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
35 | * GNU General Public License for more details.
|
||
36 | *
|
||
37 | * You should have received a copy of the GNU General Public License
|
||
38 | * along with this program; if not, write to the Free Software
|
||
39 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
|
||
40 | *
|
||
41 | * For more information, contact:
|
||
42 | *
|
||
43 | * Generalitat Valenciana
|
||
44 | * Conselleria d'Infraestructures i Transport
|
||
45 | * Av. Blasco Ib??ez, 50
|
||
46 | * 46010 VALENCIA
|
||
47 | * SPAIN
|
||
48 | *
|
||
49 | * +34 963862235
|
||
50 | * gvsig@gva.es
|
||
51 | * www.gvsig.gva.es
|
||
52 | *
|
||
53 | * or
|
||
54 | *
|
||
55 | * IVER T.I. S.A
|
||
56 | * Salamanca 50
|
||
57 | * 46005 Valencia
|
||
58 | * Spain
|
||
59 | *
|
||
60 | * +34 963163400
|
||
61 | * dac@iver.es
|
||
62 | */
|
||
63 | 377 | fjp | package com.iver.cit.gvsig.fmap.drivers.shp; |
64 | |||
65 | 6313 | fjp | import java.io.IOException; |
66 | import java.nio.ByteBuffer; |
||
67 | import java.nio.MappedByteBuffer; |
||
68 | import java.nio.channels.FileChannel; |
||
69 | import java.nio.channels.WritableByteChannel; |
||
70 | 6926 | fjp | import java.nio.charset.Charset; |
71 | 6313 | fjp | import java.text.FieldPosition; |
72 | import java.text.NumberFormat; |
||
73 | import java.util.Calendar; |
||
74 | import java.util.Date; |
||
75 | import java.util.Locale; |
||
76 | 377 | fjp | |
77 | 2578 | caballero | import com.hardcode.gdbms.engine.values.BooleanValue; |
78 | import com.hardcode.gdbms.engine.values.DateValue; |
||
79 | 2581 | fernando | import com.hardcode.gdbms.engine.values.NullValue; |
80 | 4081 | azabala | import com.hardcode.gdbms.engine.values.NumericValue; |
81 | 2578 | caballero | import com.hardcode.gdbms.engine.values.StringValue; |
82 | |||
83 | 377 | fjp | |
84 | /** A DbaseFileReader is used to read a dbase III format file.
|
||
85 | * The general use of this class is:
|
||
86 | * <CODE><PRE>
|
||
87 | * DbaseFileHeader header = ...
|
||
88 | * WritableFileChannel out = new FileOutputStream("thefile.dbf").getChannel();
|
||
89 | * DbaseFileWriter w = new DbaseFileWriter(header,out);
|
||
90 | * while ( moreRecords ) {
|
||
91 | * w.write( getMyRecord() );
|
||
92 | * }
|
||
93 | * w.close();
|
||
94 | * </PRE></CODE>
|
||
95 | * You must supply the <CODE>moreRecords</CODE> and <CODE>getMyRecord()</CODE>
|
||
96 | * logic...
|
||
97 | * @author Ian Schneider
|
||
98 | */
|
||
99 | public class DbaseFileWriterNIO { |
||
100 | |||
101 | private DbaseFileHeaderNIO header;
|
||
102 | private DbaseFileWriterNIO.FieldFormatter formatter = new DbaseFileWriterNIO.FieldFormatter(); |
||
103 | WritableByteChannel channel;
|
||
104 | private ByteBuffer buffer; |
||
105 | private final Number NULL_NUMBER = new Integer(0); |
||
106 | private final String NULL_STRING = ""; |
||
107 | 3285 | fjp | private final String NULL_DATE = " "; |
108 | 377 | fjp | |
109 | 6926 | fjp | // TODO: READ HEADER AND STABLIST THE RIGHT CHARSET
|
110 | private Charset charset = Charset.forName("ISO-8859-1"); |
||
111 | |||
112 | 377 | fjp | /** Create a DbaseFileWriter using the specified header and writing to the given
|
113 | * channel.
|
||
114 | * @param header The DbaseFileHeader to write.
|
||
115 | * @param out The Channel to write to.
|
||
116 | * @throws IOException If errors occur while initializing.
|
||
117 | */
|
||
118 | 3672 | fjp | public DbaseFileWriterNIO(DbaseFileHeaderNIO header,FileChannel out) throws IOException { |
119 | 377 | fjp | header.writeHeader(out); |
120 | this.header = header;
|
||
121 | this.channel = out;
|
||
122 | |||
123 | init(); |
||
124 | } |
||
125 | |||
126 | private void init() throws IOException { |
||
127 | buffer = ByteBuffer.allocateDirect(header.getRecordLength());
|
||
128 | } |
||
129 | |||
130 | private void write() throws IOException { |
||
131 | buffer.position(0);
|
||
132 | int r = buffer.remaining();
|
||
133 | while ( (r -= channel.write(buffer)) > 0) { |
||
134 | ; // do nothing
|
||
135 | } |
||
136 | } |
||
137 | |||
138 | |||
139 | /** Write a single dbase record.
|
||
140 | * @param record The entries to write.
|
||
141 | * @throws IOException If IO error occurs.
|
||
142 | * @throws DbaseFileException If the entry doesn't comply to the header.
|
||
143 | */
|
||
144 | public void write(Object[] record) throws IOException{ |
||
145 | /*
|
||
146 | if (record.length != header.getNumFields()) {
|
||
147 | throw new DbaseFileException("Wrong number of fields " + record.length +
|
||
148 | " expected " + header.getNumFields());
|
||
149 | }
|
||
150 | */
|
||
151 | buffer.position(0);
|
||
152 | |||
153 | // put the 'not-deleted' marker
|
||
154 | buffer.put( (byte) ' '); |
||
155 | |||
156 | for (int i = 0; i < header.getNumFields(); i++) { |
||
157 | String fieldString = fieldString(record[i], i);
|
||
158 | // if ( header.getFieldLength(i) != fieldString.getBytes().length) {
|
||
159 | // System.out.println(i + " : " + header.getFieldName(i));
|
||
160 | // }
|
||
161 | |||
162 | |||
163 | 6926 | fjp | buffer.put(fieldString.getBytes(charset.name())); |
164 | 377 | fjp | |
165 | } |
||
166 | |||
167 | |||
168 | write(); |
||
169 | } |
||
170 | |||
171 | 8765 | jjdelcerro | /** Write a single dbase record. Useful to update a dbf.
|
172 | * @param record The entries to write.
|
||
173 | * @throws IOException If IO error occurs.
|
||
174 | * @throws DbaseFileException If the entry doesn't comply to the header.
|
||
175 | */
|
||
176 | public void writeRecord(Object[] record, int numReg) throws IOException{ |
||
177 | |||
178 | if (!(channel instanceof FileChannel)) { |
||
179 | throw new IOException("DbaseFileWriterNIO: channel is not a FileChannel. Cannot position properly"); |
||
180 | } |
||
181 | |||
182 | if (record.length != header.getNumFields()) {
|
||
183 | throw new IOException("Wrong number of fields " + record.length + |
||
184 | " expected " + header.getNumFields());
|
||
185 | } |
||
186 | |||
187 | FileChannel fileChannel = (FileChannel) channel; |
||
188 | long newPos = header.getHeaderLength() + numReg*header.getRecordLength();
|
||
189 | |||
190 | buffer.position(0);
|
||
191 | |||
192 | // put the 'not-deleted' marker
|
||
193 | buffer.put( (byte) ' '); |
||
194 | |||
195 | for (int i = 0; i < header.getNumFields(); i++) { |
||
196 | String fieldString = fieldString(record[i], i);
|
||
197 | // if ( header.getFieldLength(i) != fieldString.getBytes().length) {
|
||
198 | // System.out.println(i + " : " + header.getFieldName(i));
|
||
199 | // }
|
||
200 | |||
201 | |||
202 | buffer.put(fieldString.getBytes(charset.name())); |
||
203 | |||
204 | } |
||
205 | |||
206 | fileChannel.write(buffer, newPos); |
||
207 | } |
||
208 | |||
209 | |||
210 | 377 | fjp | private String fieldString(Object obj,final int col) { |
211 | String o;
|
||
212 | final int fieldLen = header.getFieldLength(col); |
||
213 | switch (header.getFieldType(col)) {
|
||
214 | case 'C': |
||
215 | case 'c': |
||
216 | o = formatter.getFieldString( |
||
217 | fieldLen, |
||
218 | 2581 | fernando | (obj instanceof NullValue)? NULL_STRING : ((StringValue) obj).getValue()
|
219 | 377 | fjp | ); |
220 | break;
|
||
221 | case 'L': |
||
222 | case 'l': |
||
223 | 2581 | fernando | o = (obj instanceof NullValue) ? "F" : ((BooleanValue)obj).getValue() == true ? "T" : "F"; |
224 | 377 | fjp | break;
|
225 | case 'M': |
||
226 | case 'G': |
||
227 | o = formatter.getFieldString( |
||
228 | fieldLen, |
||
229 | 2581 | fernando | (obj instanceof NullValue) ? NULL_STRING : ((StringValue) obj).getValue()
|
230 | 377 | fjp | ); |
231 | break;
|
||
232 | 1132 | vcaballero | /* case 'N':
|
233 | 377 | fjp | case 'n':
|
234 | // int?
|
||
235 | if (header.getFieldDecimalCount(col) == 0) {
|
||
236 | |||
237 | o = formatter.getFieldString(
|
||
238 | 1132 | vcaballero | fieldLen, 0, (Number) (obj == null ? NULL_NUMBER : Double.valueOf(obj.toString()))
|
239 | 377 | fjp | );
|
240 | break;
|
||
241 | 1132 | vcaballero | |
242 | }
|
||
243 | */
|
||
244 | case 'N': |
||
245 | case 'n': |
||
246 | 377 | fjp | case 'F': |
247 | case 'f': |
||
248 | 4081 | azabala | Number number = null; |
249 | if(obj instanceof NullValue){ |
||
250 | number = NULL_NUMBER; |
||
251 | }else{
|
||
252 | NumericValue gVal = (NumericValue) obj; |
||
253 | number = new Double(gVal.doubleValue()); |
||
254 | } |
||
255 | 377 | fjp | o = formatter.getFieldString(fieldLen, |
256 | 4081 | azabala | header.getFieldDecimalCount(col), |
257 | number); |
||
258 | 377 | fjp | break;
|
259 | case 'D': |
||
260 | case 'd': |
||
261 | 3285 | fjp | if (obj instanceof NullValue) |
262 | o = NULL_DATE; |
||
263 | else
|
||
264 | o = formatter.getFieldString(((DateValue)obj).getValue()); |
||
265 | 377 | fjp | break;
|
266 | default:
|
||
267 | throw new RuntimeException("Unknown type " + header.getFieldType(col)); |
||
268 | } |
||
269 | |||
270 | return o;
|
||
271 | } |
||
272 | |||
273 | /** Release resources associated with this writer.
|
||
274 | * <B>Highly recommended</B>
|
||
275 | * @throws IOException If errors occur.
|
||
276 | */
|
||
277 | public void close() throws IOException { |
||
278 | // IANS - GEOT 193, bogus 0x00 written. According to dbf spec, optional
|
||
279 | // eof 0x1a marker is, well, optional. Since the original code wrote a
|
||
280 | // 0x00 (which is wrong anyway) lets just do away with this :)
|
||
281 | // - produced dbf works in OpenOffice and ArcExplorer java, so it must
|
||
282 | // be okay.
|
||
283 | // buffer.position(0);
|
||
284 | // buffer.put((byte) 0).position(0).limit(1);
|
||
285 | // write();
|
||
286 | channel.close(); |
||
287 | if (buffer instanceof MappedByteBuffer) { |
||
288 | // NIOUtilities.clean(buffer);
|
||
289 | } |
||
290 | |||
291 | buffer = null;
|
||
292 | channel = null;
|
||
293 | formatter = null;
|
||
294 | } |
||
295 | |||
296 | |||
297 | /** Utility for formatting Dbase fields. */
|
||
298 | public static class FieldFormatter { |
||
299 | private StringBuffer buffer = new StringBuffer(255); |
||
300 | private NumberFormat numFormat = NumberFormat.getNumberInstance(Locale.US); |
||
301 | private Calendar calendar = Calendar.getInstance(Locale.US); |
||
302 | private String emtpyString; |
||
303 | private static final int MAXCHARS = 255; |
||
304 | |||
305 | public FieldFormatter() {
|
||
306 | // Avoid grouping on number format
|
||
307 | numFormat.setGroupingUsed(false);
|
||
308 | |||
309 | // build a 255 white spaces string
|
||
310 | StringBuffer sb = new StringBuffer(MAXCHARS); |
||
311 | sb.setLength(MAXCHARS); |
||
312 | for(int i = 0; i < MAXCHARS; i++) { |
||
313 | sb.setCharAt(i, ' ');
|
||
314 | } |
||
315 | |||
316 | emtpyString = sb.toString(); |
||
317 | } |
||
318 | |||
319 | public String getFieldString(int size, String s) { |
||
320 | buffer.replace(0, size, emtpyString);
|
||
321 | buffer.setLength(size); |
||
322 | |||
323 | if(s != null) { |
||
324 | buffer.replace(0, size, s);
|
||
325 | if(s.length() <= size) {
|
||
326 | for(int i = s.length(); i < size; i++) { |
||
327 | buffer.append(' ');
|
||
328 | } |
||
329 | } |
||
330 | } |
||
331 | |||
332 | buffer.setLength(size); |
||
333 | return buffer.toString();
|
||
334 | } |
||
335 | |||
336 | public String getFieldString(Date d) { |
||
337 | |||
338 | if(d != null) { |
||
339 | buffer.delete(0, buffer.length());
|
||
340 | |||
341 | calendar.setTime(d); |
||
342 | int year = calendar.get(Calendar.YEAR); |
||
343 | int month = calendar.get(Calendar.MONTH) + 1; // returns 0 based month? |
||
344 | int day = calendar.get(Calendar.DAY_OF_MONTH); |
||
345 | |||
346 | if(year < 1000) { |
||
347 | if(year >= 100) { |
||
348 | buffer.append("0");
|
||
349 | } else if(year >= 10) { |
||
350 | buffer.append("00");
|
||
351 | } else {
|
||
352 | buffer.append("000");
|
||
353 | } |
||
354 | } |
||
355 | buffer.append(year); |
||
356 | |||
357 | if(month < 10) { |
||
358 | buffer.append("0");
|
||
359 | } |
||
360 | buffer.append(month); |
||
361 | |||
362 | if(day < 10) { |
||
363 | buffer.append("0");
|
||
364 | } |
||
365 | buffer.append(day); |
||
366 | } else {
|
||
367 | buffer.setLength(8);
|
||
368 | buffer.replace(0, 8, emtpyString); |
||
369 | } |
||
370 | |||
371 | buffer.setLength(8);
|
||
372 | return buffer.toString();
|
||
373 | } |
||
374 | |||
375 | public String getFieldString(int size, int decimalPlaces, Number n) { |
||
376 | buffer.delete(0, buffer.length());
|
||
377 | |||
378 | if (n != null) { |
||
379 | numFormat.setMaximumFractionDigits(decimalPlaces); |
||
380 | numFormat.setMinimumFractionDigits(decimalPlaces); |
||
381 | numFormat.format(n, buffer, new FieldPosition(NumberFormat.INTEGER_FIELD)); |
||
382 | } |
||
383 | |||
384 | int diff = size - buffer.length();
|
||
385 | if (diff >= 0) { |
||
386 | while (diff-- > 0) { |
||
387 | buffer.insert(0, ' '); |
||
388 | } |
||
389 | } else {
|
||
390 | buffer.setLength(size); |
||
391 | } |
||
392 | return buffer.toString();
|
||
393 | } |
||
394 | } |
||
395 | 8765 | jjdelcerro | |
396 | |||
397 | public void setCharset(Charset charset) { |
||
398 | this.charset = charset;
|
||
399 | |||
400 | } |
||
401 | 377 | fjp | |
402 | |||
403 | } |