root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / shp / DbaseFileWriterNIO.java @ 8181
History | View | Annotate | Download (10.6 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 | private String fieldString(Object obj,final int col) { |
||
172 | String o;
|
||
173 | final int fieldLen = header.getFieldLength(col); |
||
174 | switch (header.getFieldType(col)) {
|
||
175 | case 'C': |
||
176 | case 'c': |
||
177 | o = formatter.getFieldString( |
||
178 | fieldLen, |
||
179 | 2581 | fernando | (obj instanceof NullValue)? NULL_STRING : ((StringValue) obj).getValue()
|
180 | 377 | fjp | ); |
181 | break;
|
||
182 | case 'L': |
||
183 | case 'l': |
||
184 | 2581 | fernando | o = (obj instanceof NullValue) ? "F" : ((BooleanValue)obj).getValue() == true ? "T" : "F"; |
185 | 377 | fjp | break;
|
186 | case 'M': |
||
187 | case 'G': |
||
188 | o = formatter.getFieldString( |
||
189 | fieldLen, |
||
190 | 2581 | fernando | (obj instanceof NullValue) ? NULL_STRING : ((StringValue) obj).getValue()
|
191 | 377 | fjp | ); |
192 | break;
|
||
193 | 1132 | vcaballero | /* case 'N':
|
194 | 377 | fjp | case 'n':
|
195 | // int?
|
||
196 | if (header.getFieldDecimalCount(col) == 0) {
|
||
197 | |||
198 | o = formatter.getFieldString(
|
||
199 | 1132 | vcaballero | fieldLen, 0, (Number) (obj == null ? NULL_NUMBER : Double.valueOf(obj.toString()))
|
200 | 377 | fjp | );
|
201 | break;
|
||
202 | 1132 | vcaballero | |
203 | }
|
||
204 | */
|
||
205 | case 'N': |
||
206 | case 'n': |
||
207 | 377 | fjp | case 'F': |
208 | case 'f': |
||
209 | 4081 | azabala | Number number = null; |
210 | if(obj instanceof NullValue){ |
||
211 | number = NULL_NUMBER; |
||
212 | }else{
|
||
213 | NumericValue gVal = (NumericValue) obj; |
||
214 | number = new Double(gVal.doubleValue()); |
||
215 | } |
||
216 | 377 | fjp | o = formatter.getFieldString(fieldLen, |
217 | 4081 | azabala | header.getFieldDecimalCount(col), |
218 | number); |
||
219 | 377 | fjp | break;
|
220 | case 'D': |
||
221 | case 'd': |
||
222 | 3285 | fjp | if (obj instanceof NullValue) |
223 | o = NULL_DATE; |
||
224 | else
|
||
225 | o = formatter.getFieldString(((DateValue)obj).getValue()); |
||
226 | 377 | fjp | break;
|
227 | default:
|
||
228 | throw new RuntimeException("Unknown type " + header.getFieldType(col)); |
||
229 | } |
||
230 | |||
231 | return o;
|
||
232 | } |
||
233 | |||
234 | /** Release resources associated with this writer.
|
||
235 | * <B>Highly recommended</B>
|
||
236 | * @throws IOException If errors occur.
|
||
237 | */
|
||
238 | public void close() throws IOException { |
||
239 | // IANS - GEOT 193, bogus 0x00 written. According to dbf spec, optional
|
||
240 | // eof 0x1a marker is, well, optional. Since the original code wrote a
|
||
241 | // 0x00 (which is wrong anyway) lets just do away with this :)
|
||
242 | // - produced dbf works in OpenOffice and ArcExplorer java, so it must
|
||
243 | // be okay.
|
||
244 | // buffer.position(0);
|
||
245 | // buffer.put((byte) 0).position(0).limit(1);
|
||
246 | // write();
|
||
247 | channel.close(); |
||
248 | if (buffer instanceof MappedByteBuffer) { |
||
249 | // NIOUtilities.clean(buffer);
|
||
250 | } |
||
251 | |||
252 | buffer = null;
|
||
253 | channel = null;
|
||
254 | formatter = null;
|
||
255 | } |
||
256 | |||
257 | |||
258 | /** Utility for formatting Dbase fields. */
|
||
259 | public static class FieldFormatter { |
||
260 | private StringBuffer buffer = new StringBuffer(255); |
||
261 | private NumberFormat numFormat = NumberFormat.getNumberInstance(Locale.US); |
||
262 | private Calendar calendar = Calendar.getInstance(Locale.US); |
||
263 | private String emtpyString; |
||
264 | private static final int MAXCHARS = 255; |
||
265 | |||
266 | public FieldFormatter() {
|
||
267 | // Avoid grouping on number format
|
||
268 | numFormat.setGroupingUsed(false);
|
||
269 | |||
270 | // build a 255 white spaces string
|
||
271 | StringBuffer sb = new StringBuffer(MAXCHARS); |
||
272 | sb.setLength(MAXCHARS); |
||
273 | for(int i = 0; i < MAXCHARS; i++) { |
||
274 | sb.setCharAt(i, ' ');
|
||
275 | } |
||
276 | |||
277 | emtpyString = sb.toString(); |
||
278 | } |
||
279 | |||
280 | public String getFieldString(int size, String s) { |
||
281 | buffer.replace(0, size, emtpyString);
|
||
282 | buffer.setLength(size); |
||
283 | |||
284 | if(s != null) { |
||
285 | buffer.replace(0, size, s);
|
||
286 | if(s.length() <= size) {
|
||
287 | for(int i = s.length(); i < size; i++) { |
||
288 | buffer.append(' ');
|
||
289 | } |
||
290 | } |
||
291 | } |
||
292 | |||
293 | buffer.setLength(size); |
||
294 | return buffer.toString();
|
||
295 | } |
||
296 | |||
297 | public String getFieldString(Date d) { |
||
298 | |||
299 | if(d != null) { |
||
300 | buffer.delete(0, buffer.length());
|
||
301 | |||
302 | calendar.setTime(d); |
||
303 | int year = calendar.get(Calendar.YEAR); |
||
304 | int month = calendar.get(Calendar.MONTH) + 1; // returns 0 based month? |
||
305 | int day = calendar.get(Calendar.DAY_OF_MONTH); |
||
306 | |||
307 | if(year < 1000) { |
||
308 | if(year >= 100) { |
||
309 | buffer.append("0");
|
||
310 | } else if(year >= 10) { |
||
311 | buffer.append("00");
|
||
312 | } else {
|
||
313 | buffer.append("000");
|
||
314 | } |
||
315 | } |
||
316 | buffer.append(year); |
||
317 | |||
318 | if(month < 10) { |
||
319 | buffer.append("0");
|
||
320 | } |
||
321 | buffer.append(month); |
||
322 | |||
323 | if(day < 10) { |
||
324 | buffer.append("0");
|
||
325 | } |
||
326 | buffer.append(day); |
||
327 | } else {
|
||
328 | buffer.setLength(8);
|
||
329 | buffer.replace(0, 8, emtpyString); |
||
330 | } |
||
331 | |||
332 | buffer.setLength(8);
|
||
333 | return buffer.toString();
|
||
334 | } |
||
335 | |||
336 | public String getFieldString(int size, int decimalPlaces, Number n) { |
||
337 | buffer.delete(0, buffer.length());
|
||
338 | |||
339 | if (n != null) { |
||
340 | numFormat.setMaximumFractionDigits(decimalPlaces); |
||
341 | numFormat.setMinimumFractionDigits(decimalPlaces); |
||
342 | numFormat.format(n, buffer, new FieldPosition(NumberFormat.INTEGER_FIELD)); |
||
343 | } |
||
344 | |||
345 | int diff = size - buffer.length();
|
||
346 | if (diff >= 0) { |
||
347 | while (diff-- > 0) { |
||
348 | buffer.insert(0, ' '); |
||
349 | } |
||
350 | } else {
|
||
351 | buffer.setLength(size); |
||
352 | } |
||
353 | return buffer.toString();
|
||
354 | } |
||
355 | } |
||
356 | 8181 | fjp | |
357 | |||
358 | public void setCharset(Charset charset) { |
||
359 | this.charset = charset;
|
||
360 | |||
361 | } |
||
362 | 377 | fjp | |
363 | |||
364 | } |