root / branches / Mobile_Compatible_Hito_1 / libFMap / src-file / org / gvsig / data / datastores / vectorial / file / shp_jni / simplify / DbfDiskDataSource.java @ 21841
History | View | Annotate | Download (8.8 KB)
| 1 |
package org.gvsig.data.datastores.vectorial.file.shp_jni.simplify; |
|---|---|
| 2 |
|
| 3 |
import java.io.File; |
| 4 |
import java.io.IOException; |
| 5 |
import java.sql.Types; |
| 6 |
import java.util.Date; |
| 7 |
|
| 8 |
import org.apache.log4j.Logger; |
| 9 |
import org.gvsig.compatible.StringUtil; |
| 10 |
import org.gvsig.data.datastores.vectorial.file.shp_util.DBFDataSource; |
| 11 |
import org.gvsig.exceptions.DriverException; |
| 12 |
|
| 13 |
import es.prodevelop.gvsig.mobile.fmap.driver.vect.shp.ShpReader; |
| 14 |
|
| 15 |
|
| 16 |
/**
|
| 17 |
* This class implements a JNI-based DataSource which is based on a DBF file not
|
| 18 |
* loaded into memory.
|
| 19 |
*
|
| 20 |
* @see es.prodevelop.gvsig.mobile.fmap.driver.vect.shp.ShpReader
|
| 21 |
* @see java.sql.Types
|
| 22 |
*
|
| 23 |
* @author jldominguez
|
| 24 |
*
|
| 25 |
*/
|
| 26 |
public class DbfDiskDataSource implements DBFDataSource { |
| 27 |
|
| 28 |
private static Logger logger = Logger.getLogger(DbfDiskDataSource.class); |
| 29 |
|
| 30 |
private File dbFile = null; |
| 31 |
|
| 32 |
// private DbaseFileNIO dbFileAccess = null;
|
| 33 |
|
| 34 |
private int fieldCount = 0; |
| 35 |
|
| 36 |
private int[] fieldTypes = null; |
| 37 |
|
| 38 |
private int[] fieldWidths = null; |
| 39 |
|
| 40 |
private String[] fieldNames = null; |
| 41 |
|
| 42 |
private long fileHandler = -1; |
| 43 |
|
| 44 |
private int rowCount = 0; |
| 45 |
|
| 46 |
/**
|
| 47 |
* Constructor
|
| 48 |
*
|
| 49 |
* @param _dbFile
|
| 50 |
* the DBF file to read
|
| 51 |
*/
|
| 52 |
public DbfDiskDataSource(File _dbFile) { |
| 53 |
dbFile = _dbFile; |
| 54 |
} |
| 55 |
|
| 56 |
/**
|
| 57 |
* Initializes the dfata source (reads the file metadata)
|
| 58 |
*/
|
| 59 |
public void start() throws DriverException { |
| 60 |
|
| 61 |
try {
|
| 62 |
fileHandler = ShpReader.openDbfFile(dbFile.getCanonicalPath(), |
| 63 |
false);
|
| 64 |
if (fileHandler != 0) { |
| 65 |
fieldCount = ShpReader.getDbfFileFieldCount(fileHandler); |
| 66 |
fieldTypes = dbfTypesToSqlTypes(ShpReader.getDbfFileFieldTypes( |
| 67 |
fileHandler, fieldCount)); |
| 68 |
fieldNames = commaSeparatedToStringArray(ShpReader |
| 69 |
.getDbfFileFieldNames(fileHandler, fieldCount)); |
| 70 |
fieldWidths = ShpReader.getDbfFileFieldWidths(fileHandler, |
| 71 |
fieldCount); |
| 72 |
rowCount = ShpReader.getDbfFileRowCount(fileHandler); |
| 73 |
} |
| 74 |
} catch (IOException e) { |
| 75 |
logger.error("Error while opening db file "
|
| 76 |
+ dbFile.getAbsolutePath() + ": " + e.getMessage());
|
| 77 |
throw new DriverException(e.getMessage()); |
| 78 |
} |
| 79 |
} |
| 80 |
|
| 81 |
/**
|
| 82 |
* Utility conversion method.
|
| 83 |
*
|
| 84 |
* @param commasep
|
| 85 |
* s comma separated list of values
|
| 86 |
* @return the Strings in an array
|
| 87 |
*/
|
| 88 |
public static String[] commaSeparatedToStringArray(String commasep) { |
| 89 |
String[] resp = StringUtil.splitString(commasep, ","); |
| 90 |
if (resp.length > 0) |
| 91 |
resp[0] = resp[0].substring(1); |
| 92 |
return resp;
|
| 93 |
} |
| 94 |
|
| 95 |
private int[] dbfTypesToSqlTypes(char[] types) { |
| 96 |
int size = types.length;
|
| 97 |
int[] resp = new int[size]; |
| 98 |
|
| 99 |
for (int i = 0; i < size; i++) { |
| 100 |
|
| 101 |
resp[i] = Types.VARCHAR;
|
| 102 |
char c = types[i];
|
| 103 |
if (c == 'C') |
| 104 |
resp[i] = Types.VARCHAR;
|
| 105 |
if (c == 'D') |
| 106 |
resp[i] = Types.VARCHAR;
|
| 107 |
if (c == 'F') |
| 108 |
resp[i] = Types.DOUBLE;
|
| 109 |
if (c == 'N') |
| 110 |
resp[i] = Types.DOUBLE;
|
| 111 |
if (c == 'L') |
| 112 |
resp[i] = Types.BOOLEAN;
|
| 113 |
} |
| 114 |
return resp;
|
| 115 |
} |
| 116 |
|
| 117 |
/**
|
| 118 |
* Stops the datasource. Tries to close the DBF file.
|
| 119 |
*/
|
| 120 |
public void stop() throws DriverException { |
| 121 |
if (!ShpReader.closeDbfFile(fileHandler)) {
|
| 122 |
throw new DriverException("While closing DBF file: " |
| 123 |
+ dbFile.getAbsolutePath()); |
| 124 |
} |
| 125 |
} |
| 126 |
|
| 127 |
/**
|
| 128 |
* @return the data source generic name
|
| 129 |
*/
|
| 130 |
public String getName() { |
| 131 |
return "DBF Data Source"; |
| 132 |
} |
| 133 |
|
| 134 |
/**
|
| 135 |
* @return an array representing the WHERE filter. Currently unused.
|
| 136 |
*/
|
| 137 |
public long[] getWhereFilter() throws IOException { |
| 138 |
logger.warn("Method getWhereFilter() was called, returned new long[0]");
|
| 139 |
return new long[0]; |
| 140 |
} |
| 141 |
|
| 142 |
/**
|
| 143 |
* @return a string representing the datasource. Unused. Simply redirects to
|
| 144 |
* <code>getName()</code>
|
| 145 |
*/
|
| 146 |
public String getAsString() throws DriverException { |
| 147 |
logger.warn("Method getAsString() was called, returned getName()");
|
| 148 |
return getName();
|
| 149 |
} |
| 150 |
|
| 151 |
/**
|
| 152 |
* Called when the layer is removed. Tries to prevent memory leaks.
|
| 153 |
*
|
| 154 |
*/
|
| 155 |
public void remove() throws DriverException { |
| 156 |
logger.warn("Method remove() was called, nothing done.");
|
| 157 |
} |
| 158 |
|
| 159 |
/**
|
| 160 |
* @return an array with the indices of the primary keys.
|
| 161 |
*/
|
| 162 |
public int[] getPrimaryKeys() throws DriverException { |
| 163 |
logger |
| 164 |
.warn("Method getPrimaryKeys() was called, returned all indices.");
|
| 165 |
int[] resp = new int[fieldCount]; |
| 166 |
for (int i = 0; i < fieldCount; i++) |
| 167 |
resp[i] = i; |
| 168 |
return resp;
|
| 169 |
} |
| 170 |
|
| 171 |
/**
|
| 172 |
* Gets the name of one of the fields that compose the PK.
|
| 173 |
*
|
| 174 |
* @param arg0
|
| 175 |
* the index of the PK field of interest
|
| 176 |
* @return the name of the field of interest
|
| 177 |
*/
|
| 178 |
public String getPKName(int arg0) throws DriverException { |
| 179 |
logger.warn("Method getPKName(" + arg0 + ") was called, returned NULL"); |
| 180 |
return null; |
| 181 |
} |
| 182 |
|
| 183 |
/**
|
| 184 |
* @return the names of the fields that compose the PK.
|
| 185 |
*
|
| 186 |
*/
|
| 187 |
public String[] getPKNames() throws DriverException { |
| 188 |
logger.warn("Method getPKNames() was called, returned NULL");
|
| 189 |
return null; |
| 190 |
} |
| 191 |
|
| 192 |
/**
|
| 193 |
* Gets the type of one of the fields that compose the PK.
|
| 194 |
*
|
| 195 |
* @param arg0
|
| 196 |
* the index of the field of interest
|
| 197 |
* @return the type of the field of interest
|
| 198 |
*/
|
| 199 |
public int getPKType(int arg0) throws DriverException { |
| 200 |
logger.warn("Method getPKType(" + arg0
|
| 201 |
+ ") was called, returned getFieldType(...)");
|
| 202 |
return fieldTypes[arg0];
|
| 203 |
} |
| 204 |
|
| 205 |
/**
|
| 206 |
* @return the cumber of fields that compose the PK.
|
| 207 |
*/
|
| 208 |
public int getPKCardinality() throws DriverException { |
| 209 |
return fieldCount;
|
| 210 |
} |
| 211 |
|
| 212 |
private Object getValueOfItsType(int fieldindex, int row) { |
| 213 |
|
| 214 |
Object resp = null; |
| 215 |
|
| 216 |
int type = fieldTypes[fieldindex];
|
| 217 |
switch (type) {
|
| 218 |
|
| 219 |
case Types.DOUBLE: |
| 220 |
double val = 0; |
| 221 |
try {
|
| 222 |
val = ShpReader.getDbfNumberFieldValue(fileHandler, row, |
| 223 |
fieldindex); |
| 224 |
} catch (Throwable th) { |
| 225 |
logger.debug("Error: " + th.getMessage());
|
| 226 |
} |
| 227 |
resp = new Double(val); |
| 228 |
break;
|
| 229 |
|
| 230 |
case Types.VARCHAR: |
| 231 |
resp = ShpReader.getDbfStringFieldValue(fileHandler, row, fieldindex); |
| 232 |
break;
|
| 233 |
|
| 234 |
case Types.DATE: |
| 235 |
|
| 236 |
resp = Date.parse(ShpReader.getDbfStringFieldValue(fileHandler, row, fieldindex));
|
| 237 |
break;
|
| 238 |
|
| 239 |
case Types.BOOLEAN: |
| 240 |
|
| 241 |
resp = new Boolean(ShpReader.getDbfBooleanFieldValue(fileHandler, row, fieldindex)); |
| 242 |
break;
|
| 243 |
} |
| 244 |
|
| 245 |
return resp;
|
| 246 |
} |
| 247 |
|
| 248 |
// /**
|
| 249 |
// * Gets a row of this data source.
|
| 250 |
// *
|
| 251 |
// * @param rowind
|
| 252 |
// * the index of the row of interest
|
| 253 |
// * @return the row as an array of values
|
| 254 |
// */
|
| 255 |
// public Value[] getRow(long rowind) throws DriverException {
|
| 256 |
// Value[] resp = new Value[fieldCount];
|
| 257 |
// for (int i = 0; i < fieldCount; i++) {
|
| 258 |
// resp[i] = getValueOfItsType(i, (int) rowind);
|
| 259 |
// }
|
| 260 |
// return resp;
|
| 261 |
// }
|
| 262 |
|
| 263 |
/**
|
| 264 |
* @return an array with all the field names
|
| 265 |
*/
|
| 266 |
public String[] getFieldNames() throws DriverException { |
| 267 |
return fieldNames;
|
| 268 |
} |
| 269 |
|
| 270 |
/**
|
| 271 |
* Gets the idnex of a field, provided its name.
|
| 272 |
*
|
| 273 |
* @param arg0
|
| 274 |
* the name of the field of interest
|
| 275 |
* @return the index of the field of interest
|
| 276 |
*/
|
| 277 |
public int getFieldIndexByName(String arg0) throws DriverException { |
| 278 |
for (int i = 0; i < fieldCount; i++) { |
| 279 |
if (arg0.compareToIgnoreCase(fieldNames[i]) == 0) |
| 280 |
return i;
|
| 281 |
} |
| 282 |
logger.error("Field name not found: " + arg0);
|
| 283 |
return -1; |
| 284 |
} |
| 285 |
|
| 286 |
/**
|
| 287 |
* Gets whether the referenced field is virtual or not.
|
| 288 |
*
|
| 289 |
* @param arg0
|
| 290 |
* the index of the field of interest
|
| 291 |
* @return whether it is a virtual field.
|
| 292 |
*
|
| 293 |
*/
|
| 294 |
public boolean isVirtualField(int arg0) throws DriverException { |
| 295 |
return false; |
| 296 |
} |
| 297 |
|
| 298 |
// /**
|
| 299 |
// * @return the associated driver, currently unused.
|
| 300 |
// */
|
| 301 |
// public Driver getDriver() {
|
| 302 |
// logger.warn("Method getDriver() returned NULL.");
|
| 303 |
// return null;
|
| 304 |
// }
|
| 305 |
|
| 306 |
/**
|
| 307 |
* Reloads the data source (stops and starts)
|
| 308 |
*/
|
| 309 |
public void reload() throws DriverException, IOException { |
| 310 |
stop(); |
| 311 |
start(); |
| 312 |
} |
| 313 |
|
| 314 |
/**
|
| 315 |
* Gets a value from thsi data source.
|
| 316 |
*
|
| 317 |
* @param arg0
|
| 318 |
* the row of interest
|
| 319 |
* @param arg1
|
| 320 |
* the index of the field of interest
|
| 321 |
*
|
| 322 |
* @return the value of the given row and field
|
| 323 |
*/
|
| 324 |
public Object getFieldValue(long arg0, int arg1) throws DriverException { |
| 325 |
return getValueOfItsType(arg1, (int) arg0); |
| 326 |
} |
| 327 |
|
| 328 |
/**
|
| 329 |
* @return the number of fields in this datasource
|
| 330 |
*/
|
| 331 |
public int getFieldCount() throws DriverException { |
| 332 |
return fieldCount;
|
| 333 |
} |
| 334 |
|
| 335 |
/**
|
| 336 |
* Gets the name of the field with the given index.
|
| 337 |
*
|
| 338 |
* @param arg0
|
| 339 |
* the index of the field of interest
|
| 340 |
* @return the name of the field
|
| 341 |
*/
|
| 342 |
public String getFieldName(int arg0) throws DriverException { |
| 343 |
return fieldNames[arg0];
|
| 344 |
} |
| 345 |
|
| 346 |
/**
|
| 347 |
* @return the number of rows in this data source
|
| 348 |
*/
|
| 349 |
public long getRowCount() throws DriverException { |
| 350 |
return rowCount;
|
| 351 |
} |
| 352 |
|
| 353 |
/**
|
| 354 |
* Gets the type of the field with the given index.
|
| 355 |
*
|
| 356 |
* @param arg0
|
| 357 |
* the index of the field of interest
|
| 358 |
* @return teh field type
|
| 359 |
*/
|
| 360 |
public int getFieldType(int arg0) throws DriverException { |
| 361 |
return fieldTypes[arg0];
|
| 362 |
} |
| 363 |
|
| 364 |
/**
|
| 365 |
* Gets the width of the field with the given index.
|
| 366 |
*
|
| 367 |
* @param arg0
|
| 368 |
* the index of the field of interest
|
| 369 |
* @return teh field width
|
| 370 |
*/
|
| 371 |
public int getFieldWidth(int arg0) throws DriverException { |
| 372 |
return fieldWidths[arg0];
|
| 373 |
} |
| 374 |
} |