root / branches / v2_0_0_prep / libraries / libFMap_daldb / src / org / gvsig / fmap / dal / store / jdbc / JDBCSetProvider.java @ 28909
History | View | Annotate | Download (9.94 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 |
/**
|
| 29 |
*
|
| 30 |
*/
|
| 31 |
package org.gvsig.fmap.dal.store.jdbc; |
| 32 |
|
| 33 |
import java.util.ArrayList; |
| 34 |
import java.util.Arrays; |
| 35 |
import java.util.Iterator; |
| 36 |
import java.util.List; |
| 37 |
import java.util.NoSuchElementException; |
| 38 |
|
| 39 |
import org.gvsig.fmap.dal.DataTypes; |
| 40 |
import org.gvsig.fmap.dal.exception.DataException; |
| 41 |
import org.gvsig.fmap.dal.feature.DisposableIterator; |
| 42 |
import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
| 43 |
import org.gvsig.fmap.dal.feature.FeatureQuery; |
| 44 |
import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
| 45 |
import org.gvsig.fmap.dal.feature.FeatureType; |
| 46 |
import org.gvsig.fmap.dal.feature.FeatureQueryOrder.FeatureQueryOrderMember; |
| 47 |
import org.gvsig.fmap.dal.feature.spi.FeatureSetProvider; |
| 48 |
import org.gvsig.tools.evaluator.Evaluator; |
| 49 |
import org.gvsig.tools.evaluator.EvaluatorFieldValue; |
| 50 |
import org.gvsig.tools.evaluator.EvaluatorFieldsInfo; |
| 51 |
import org.slf4j.Logger; |
| 52 |
import org.slf4j.LoggerFactory; |
| 53 |
|
| 54 |
/**
|
| 55 |
* @author jmvivo
|
| 56 |
*
|
| 57 |
*/
|
| 58 |
public class JDBCSetProvider implements FeatureSetProvider { |
| 59 |
|
| 60 |
final static private Logger logger = LoggerFactory |
| 61 |
.getLogger(JDBCSetProvider.class); |
| 62 |
|
| 63 |
|
| 64 |
|
| 65 |
protected JDBCStoreProvider store;
|
| 66 |
protected FeatureQuery query;
|
| 67 |
protected FeatureType featureType;
|
| 68 |
protected String filter; |
| 69 |
protected String order; |
| 70 |
protected Long size = null; |
| 71 |
protected Boolean isEmpty = null; |
| 72 |
|
| 73 |
protected List resultSetIDReferenced; |
| 74 |
|
| 75 |
private JDBCHelper helper = null; |
| 76 |
|
| 77 |
public JDBCSetProvider(JDBCStoreProvider store, FeatureQuery query,
|
| 78 |
FeatureType featureType) throws DataException {
|
| 79 |
this.store = store;
|
| 80 |
this.query = query;
|
| 81 |
this.featureType = featureType;
|
| 82 |
this.resultSetIDReferenced = new ArrayList(); |
| 83 |
|
| 84 |
if (query.hasFilter() && this.canFilter()) { |
| 85 |
setFilter(query.getFilter()); |
| 86 |
} else {
|
| 87 |
setFilter(null);
|
| 88 |
} |
| 89 |
|
| 90 |
if (query.hasOrder() && canOrder()) {
|
| 91 |
setOrder(query.getOrder()); |
| 92 |
} else {
|
| 93 |
setOrder(null);
|
| 94 |
} |
| 95 |
} |
| 96 |
|
| 97 |
protected String getSqlForEvaluator(Evaluator filter) { |
| 98 |
if (filter == null) { |
| 99 |
return null; |
| 100 |
} |
| 101 |
EvaluatorFieldsInfo info = filter.getFieldsInfo(); |
| 102 |
String filterString = filter.getCQL();
|
| 103 |
if (info == null) { |
| 104 |
return filterString;
|
| 105 |
} |
| 106 |
String[] filterNames = info.getFieldNames(); |
| 107 |
String[] finalNames = new String[filterNames.length]; |
| 108 |
EvaluatorFieldValue[] fValues;
|
| 109 |
|
| 110 |
List values = new ArrayList(); |
| 111 |
|
| 112 |
FeatureAttributeDescriptor attr; |
| 113 |
for (int i = 0; i < filterNames.length; i++) { |
| 114 |
attr = featureType.getAttributeDescriptor(filterNames[i]); |
| 115 |
if (attr == null) { |
| 116 |
finalNames[i] = filterNames[i]; |
| 117 |
continue;
|
| 118 |
} |
| 119 |
finalNames[i] = getEscapedFieldName(attr.getName()); |
| 120 |
|
| 121 |
} |
| 122 |
|
| 123 |
for (int i = 0; i < filterNames.length; i++) { |
| 124 |
if (!filterNames[i].equals(finalNames[i])) {
|
| 125 |
filterString.replaceAll("\\b" + filterNames[i] + "\\b", |
| 126 |
finalNames[i]); |
| 127 |
} |
| 128 |
} |
| 129 |
|
| 130 |
return filterString;
|
| 131 |
} |
| 132 |
|
| 133 |
|
| 134 |
protected String getEscapedFieldName(String fieldName) { |
| 135 |
if (helper == null) { |
| 136 |
helper = (store).getHelper(); |
| 137 |
} |
| 138 |
return helper.escapeFieldName(fieldName);
|
| 139 |
} |
| 140 |
|
| 141 |
|
| 142 |
protected void setOrder(FeatureQueryOrder order) { |
| 143 |
if (order == null || order.size() == 0) { |
| 144 |
this.order = null; |
| 145 |
return;
|
| 146 |
} |
| 147 |
|
| 148 |
StringBuilder buffer = new StringBuilder(); |
| 149 |
Iterator iter = order.iterator();
|
| 150 |
FeatureQueryOrderMember menber; |
| 151 |
while (true) { |
| 152 |
menber = (FeatureQueryOrderMember) iter.next(); |
| 153 |
if (menber.hasEvaluator()) {
|
| 154 |
buffer.append(getSqlForEvaluator(menber.getEvaluator())); |
| 155 |
} else {
|
| 156 |
buffer.append(getEscapedFieldName(menber.getAttributeName())); |
| 157 |
} |
| 158 |
if (menber.getAscending()) {
|
| 159 |
buffer.append(" ASC");
|
| 160 |
} else {
|
| 161 |
buffer.append(" DESC");
|
| 162 |
} |
| 163 |
if (iter.hasNext()) {
|
| 164 |
buffer.append(", ");
|
| 165 |
} else {
|
| 166 |
buffer.append(' ');
|
| 167 |
break;
|
| 168 |
} |
| 169 |
} |
| 170 |
|
| 171 |
this.order = buffer.toString();
|
| 172 |
} |
| 173 |
|
| 174 |
protected void setFilter(Evaluator filter) { |
| 175 |
this.filter = getSqlForEvaluator(filter);
|
| 176 |
} |
| 177 |
|
| 178 |
|
| 179 |
|
| 180 |
/* (non-Javadoc)
|
| 181 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#canFilter()
|
| 182 |
*/
|
| 183 |
public boolean canFilter() { |
| 184 |
Evaluator filter = query.getFilter(); |
| 185 |
if (filter != null) { |
| 186 |
if (filter.getCQL() == null || filter.getCQL().length() == 0) { |
| 187 |
return false; |
| 188 |
} else {
|
| 189 |
// TODO Check Geom fields if
|
| 190 |
EvaluatorFieldsInfo fInfo = filter.getFieldsInfo(); |
| 191 |
if (fInfo == null || fInfo.getFieldNames() == null) { |
| 192 |
return true; |
| 193 |
} |
| 194 |
Iterator names = Arrays.asList(fInfo.getFieldNames()) |
| 195 |
.iterator(); |
| 196 |
String name;
|
| 197 |
int type;
|
| 198 |
while (names.hasNext()) {
|
| 199 |
name = (String) names.next();
|
| 200 |
type = this.featureType.getAttributeDescriptor(name)
|
| 201 |
.getDataType(); |
| 202 |
if (type == DataTypes.GEOMETRY
|
| 203 |
&& !this.helper.hasGeometrySupport()) {
|
| 204 |
return false; |
| 205 |
} |
| 206 |
|
| 207 |
|
| 208 |
|
| 209 |
} |
| 210 |
|
| 211 |
return true; |
| 212 |
} |
| 213 |
|
| 214 |
} else{
|
| 215 |
return false; |
| 216 |
} |
| 217 |
} |
| 218 |
|
| 219 |
/* (non-Javadoc)
|
| 220 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#canIterateFromIndex()
|
| 221 |
*/
|
| 222 |
public boolean canIterateFromIndex() { |
| 223 |
return helper.supportOffset();
|
| 224 |
} |
| 225 |
|
| 226 |
/* (non-Javadoc)
|
| 227 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#canOrder()
|
| 228 |
*/
|
| 229 |
public boolean canOrder() { |
| 230 |
// TODO Check Geom fields if postgis not are available
|
| 231 |
if (query.hasOrder()) {
|
| 232 |
Iterator iter = query.getOrder().iterator();
|
| 233 |
FeatureQueryOrderMember menber; |
| 234 |
String cql;
|
| 235 |
while (iter.hasNext()){
|
| 236 |
menber = (FeatureQueryOrderMember) iter.next(); |
| 237 |
if (menber.hasEvaluator()){
|
| 238 |
cql =menber.getEvaluator().getCQL(); |
| 239 |
if (cql == null || cql.length() == 0) { |
| 240 |
return false; |
| 241 |
} |
| 242 |
} |
| 243 |
} |
| 244 |
} |
| 245 |
return true; |
| 246 |
} |
| 247 |
|
| 248 |
public void dispose() { |
| 249 |
if (resultSetIDReferenced != null) { |
| 250 |
Iterator iter = resultSetIDReferenced.iterator();
|
| 251 |
Integer resID;
|
| 252 |
while (iter.hasNext()) {
|
| 253 |
resID = (Integer) iter.next();
|
| 254 |
if (resID != null) { |
| 255 |
logger.warn( |
| 256 |
"ResultSet (ID {}) not closed on dispose, will close",
|
| 257 |
resID); |
| 258 |
try {
|
| 259 |
this.store.closeResulset(resID.intValue());
|
| 260 |
} catch (DataException e) {
|
| 261 |
logger.error("Close resulset Exception", e);
|
| 262 |
} |
| 263 |
} |
| 264 |
iter.remove(); |
| 265 |
} |
| 266 |
} |
| 267 |
resultSetIDReferenced = null;
|
| 268 |
store = null;
|
| 269 |
query = null;
|
| 270 |
featureType = null;
|
| 271 |
filter = null;
|
| 272 |
order = null;
|
| 273 |
size = null;
|
| 274 |
isEmpty = null;
|
| 275 |
} |
| 276 |
|
| 277 |
|
| 278 |
/*
|
| 279 |
* (non-Javadoc)
|
| 280 |
*
|
| 281 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#fastIterator()
|
| 282 |
*/
|
| 283 |
public DisposableIterator fastIterator() throws DataException { |
| 284 |
return this.fastIterator(0); |
| 285 |
} |
| 286 |
|
| 287 |
/*
|
| 288 |
* (non-Javadoc)
|
| 289 |
*
|
| 290 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#fastIterator(long)
|
| 291 |
*/
|
| 292 |
public DisposableIterator fastIterator(long index) throws DataException { |
| 293 |
if (isEmpty != null && isEmpty.booleanValue()) { |
| 294 |
return new EmptyJDBCIterator(); |
| 295 |
} |
| 296 |
JDBCIterator iter = createFastIterartor(index); |
| 297 |
return iter;
|
| 298 |
} |
| 299 |
|
| 300 |
protected String getSQL(long fromIndex) throws DataException { |
| 301 |
return store.compoundSelect(featureType, filter, order, 0, fromIndex); |
| 302 |
|
| 303 |
} |
| 304 |
|
| 305 |
protected JDBCIterator createFastIterartor(long index) throws DataException { |
| 306 |
int rsID = store.createResultSet(getSQL(index));
|
| 307 |
return createDefaultFastIterartor(rsID);
|
| 308 |
} |
| 309 |
|
| 310 |
protected JDBCIterator createIterator(long index) throws DataException { |
| 311 |
int rsID = store.createResultSet(getSQL(index));
|
| 312 |
return createDefaultIterartor(rsID);
|
| 313 |
} |
| 314 |
protected JDBCIterator createDefaultFastIterartor(int resultSetID) |
| 315 |
throws DataException {
|
| 316 |
return new JDBCFastIterator(store, this, featureType, resultSetID); |
| 317 |
} |
| 318 |
|
| 319 |
/* (non-Javadoc)
|
| 320 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#getSize()
|
| 321 |
*/
|
| 322 |
public long getSize() throws DataException { |
| 323 |
if (size == null) { |
| 324 |
size = new Long(store.getCount(filter)); |
| 325 |
} |
| 326 |
return size.longValue();
|
| 327 |
} |
| 328 |
|
| 329 |
/* (non-Javadoc)
|
| 330 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#isEmpty()
|
| 331 |
*/
|
| 332 |
public boolean isEmpty() throws DataException { |
| 333 |
if (isEmpty == null) { |
| 334 |
if (size == null) { |
| 335 |
String sql = store
|
| 336 |
.compoundSelect(featureType, filter, null, 1, |
| 337 |
0);
|
| 338 |
int rsID = store.createResultSet(sql);
|
| 339 |
isEmpty = new Boolean(store.resulsetNext(rsID)); |
| 340 |
store.closeResulset(rsID); |
| 341 |
} else {
|
| 342 |
isEmpty = new Boolean(size.longValue() < 1); |
| 343 |
} |
| 344 |
} |
| 345 |
return isEmpty.booleanValue();
|
| 346 |
} |
| 347 |
|
| 348 |
/* (non-Javadoc)
|
| 349 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#iterator()
|
| 350 |
*/
|
| 351 |
public DisposableIterator iterator() throws DataException { |
| 352 |
return iterator(0); |
| 353 |
} |
| 354 |
|
| 355 |
/* (non-Javadoc)
|
| 356 |
* @see org.gvsig.fmap.dal.feature.spi.FeatureSetProvider#iterator(long)
|
| 357 |
*/
|
| 358 |
public DisposableIterator iterator(long index) throws DataException { |
| 359 |
if (isEmpty != null && isEmpty.booleanValue()) { |
| 360 |
return new EmptyJDBCIterator(); |
| 361 |
} |
| 362 |
|
| 363 |
JDBCIterator iter = createIterator(index); |
| 364 |
return iter;
|
| 365 |
} |
| 366 |
|
| 367 |
|
| 368 |
protected JDBCIterator createDefaultIterartor(int resultSetID) |
| 369 |
throws DataException {
|
| 370 |
return new JDBCIterator(store, this, featureType, resultSetID); |
| 371 |
} |
| 372 |
|
| 373 |
private class EmptyJDBCIterator extends JDBCIterator { |
| 374 |
|
| 375 |
protected EmptyJDBCIterator() throws DataException { |
| 376 |
super(null, null, null, -1); |
| 377 |
} |
| 378 |
|
| 379 |
public boolean hasNext() { |
| 380 |
return false; |
| 381 |
} |
| 382 |
|
| 383 |
public Object next() { |
| 384 |
throw new NoSuchElementException(); |
| 385 |
} |
| 386 |
|
| 387 |
public void dispose() { |
| 388 |
|
| 389 |
} |
| 390 |
|
| 391 |
} |
| 392 |
|
| 393 |
public void addResulsetReference(int resulsetID) { |
| 394 |
this.resultSetIDReferenced.add(new Integer(resulsetID)); |
| 395 |
} |
| 396 |
|
| 397 |
public void removeResulsetReference(int resulsetID) { |
| 398 |
this.resultSetIDReferenced.remove(new Integer(resulsetID)); |
| 399 |
} |
| 400 |
|
| 401 |
|
| 402 |
} |