svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libFMap_dataDB / src / org / gvsig / data / datastores / vectorial / db / jdbc / postgresql / PostgresqlFeatureCollectionEditingFiltered.java @ 20973
History | View | Annotate | Download (8.21 KB)
| 1 |
package org.gvsig.data.datastores.vectorial.db.jdbc.postgresql; |
|---|---|
| 2 |
|
| 3 |
|
| 4 |
import java.sql.Connection; |
| 5 |
import java.sql.ResultSet; |
| 6 |
import java.sql.Statement; |
| 7 |
import java.util.Iterator; |
| 8 |
import java.util.NoSuchElementException; |
| 9 |
|
| 10 |
import org.gvsig.data.ReadException; |
| 11 |
import org.gvsig.data.datastores.vectorial.db.DBDataFeatureCollection; |
| 12 |
import org.gvsig.data.datastores.vectorial.db.DBFeatureType; |
| 13 |
import org.gvsig.data.datastores.vectorial.db.jdbc.SQLException; |
| 14 |
import org.gvsig.data.vectorial.FeatureManager; |
| 15 |
import org.gvsig.data.vectorial.IFeature; |
| 16 |
import org.gvsig.data.vectorial.IFeatureType; |
| 17 |
import org.gvsig.data.vectorial.expressionevaluator.FeatureFilter; |
| 18 |
import org.gvsig.exceptions.BaseException; |
| 19 |
|
| 20 |
public class PostgresqlFeatureCollectionEditingFiltered extends DBDataFeatureCollection { |
| 21 |
protected DBFeatureType featureType;
|
| 22 |
protected String totalFilter; |
| 23 |
protected String filter; |
| 24 |
protected PostgresqlStore store;
|
| 25 |
private int numReg=-1; |
| 26 |
private String sql; |
| 27 |
private String sqlCount; |
| 28 |
private String totalOrder; |
| 29 |
private int fetchSize=5000; |
| 30 |
private FeatureManager featureManager;
|
| 31 |
private FeatureFilter parser;
|
| 32 |
|
| 33 |
|
| 34 |
PostgresqlFeatureCollectionEditingFiltered(FeatureManager fm,PostgresqlStore store,IFeatureType type,String filter) {
|
| 35 |
this.featureManager=fm;
|
| 36 |
this.store=store;
|
| 37 |
this.featureType=(DBFeatureType)type;
|
| 38 |
|
| 39 |
this.filter = filter;
|
| 40 |
|
| 41 |
this.calculateWhere();
|
| 42 |
this.totalOrder = store.getBaseOrder();
|
| 43 |
|
| 44 |
this.sql = this.store.getSqlSelectPart(); |
| 45 |
this.sqlCount = "Select count(*) From "+ ((PostgresqlStoreParameters)this.store.getParameters()).tableID(); |
| 46 |
if (!isStringEmpty(this.totalFilter)){ |
| 47 |
this.sql= this.sql + " Where " + this.totalFilter; |
| 48 |
this.sqlCount= this.sqlCount + " Where " + this.totalFilter; |
| 49 |
} |
| 50 |
if (!isStringEmpty(this.totalOrder)){ |
| 51 |
this.sql= this.sql + " Order by " + this.totalOrder; |
| 52 |
} |
| 53 |
|
| 54 |
if (this.filter!=null) |
| 55 |
parser = new FeatureFilter(filter,this.featureType); |
| 56 |
|
| 57 |
} |
| 58 |
|
| 59 |
private void calculateWhere(){ |
| 60 |
if (isStringEmpty(this.store.getBaseWhereClause())){ |
| 61 |
this.totalFilter = this.filter; |
| 62 |
} else {
|
| 63 |
this.totalFilter = "(" + this.store.getBaseWhereClause() + ") and " +this.filter; |
| 64 |
} |
| 65 |
} |
| 66 |
|
| 67 |
private ResultSet getNewResulset(String aSql) throws ReadException{ |
| 68 |
this.store.open();
|
| 69 |
|
| 70 |
Connection con = this.store.getConnection(); |
| 71 |
|
| 72 |
try {
|
| 73 |
Statement st = con.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
| 74 |
return st.executeQuery(aSql);
|
| 75 |
|
| 76 |
} catch (java.sql.SQLException e) {
|
| 77 |
throw new SQLException(aSql,this.store.getName(),e); |
| 78 |
} |
| 79 |
|
| 80 |
} |
| 81 |
|
| 82 |
public int size() { |
| 83 |
checkModified(); |
| 84 |
if (this.numReg < 0){ |
| 85 |
this.numReg =0; |
| 86 |
try{
|
| 87 |
Iterator iter = this.iterator(); |
| 88 |
while (true){ |
| 89 |
iter.next(); |
| 90 |
this.numReg++;
|
| 91 |
} |
| 92 |
} catch (NoSuchElementException e){ |
| 93 |
//Normal condition exit
|
| 94 |
} |
| 95 |
} |
| 96 |
return this.numReg; |
| 97 |
|
| 98 |
} |
| 99 |
|
| 100 |
|
| 101 |
public Iterator iterator() { |
| 102 |
checkModified(); |
| 103 |
try{
|
| 104 |
PostgresIterator dbIter=new PostgresIterator(this.store,this.featureType,this.sql,this.fetchSize,this.featureManager); |
| 105 |
return dbIter;
|
| 106 |
} catch (BaseException e){
|
| 107 |
throw new RuntimeException(e); |
| 108 |
} |
| 109 |
} |
| 110 |
|
| 111 |
protected class PostgresIterator implements Iterator{ |
| 112 |
private Iterator dbIter; |
| 113 |
private Iterator mIter; |
| 114 |
public PostgresIterator(PostgresqlStore store,DBFeatureType featureType,String sql, int fetchSize,FeatureManager featureManager) throws ReadException{ |
| 115 |
this.dbIter = new IteratorDB(store,featureType,sql,fetchSize,featureManager); |
| 116 |
this.mIter = new IteratorMemory(featureType,featureManager); |
| 117 |
} |
| 118 |
public boolean hasNext() { |
| 119 |
return dbIter.hasNext() || mIter.hasNext();
|
| 120 |
} |
| 121 |
public Object next() { |
| 122 |
if (dbIter.hasNext()){
|
| 123 |
return dbIter.next();
|
| 124 |
} |
| 125 |
return mIter.next();
|
| 126 |
} |
| 127 |
public void remove() { |
| 128 |
throw new UnsupportedOperationException(); |
| 129 |
} |
| 130 |
|
| 131 |
|
| 132 |
|
| 133 |
} |
| 134 |
|
| 135 |
protected class IteratorDB implements Iterator{ |
| 136 |
private boolean nextChecked=false; |
| 137 |
private IFeature feature;
|
| 138 |
private ResultSet rs; |
| 139 |
private PostgresqlStore store;
|
| 140 |
private DBFeatureType featureType;
|
| 141 |
private boolean rsEOF=false; |
| 142 |
private FeatureManager featureManager;
|
| 143 |
private int fetchSize; |
| 144 |
private String sql; |
| 145 |
private int page; |
| 146 |
private int index; |
| 147 |
|
| 148 |
|
| 149 |
public IteratorDB(PostgresqlStore store, DBFeatureType featureType,String sql,int fetchSize, FeatureManager featureManager) throws ReadException{ |
| 150 |
this.store = store;
|
| 151 |
this.featureType = featureType;
|
| 152 |
this.featureManager= featureManager;
|
| 153 |
this.fetchSize = fetchSize;
|
| 154 |
this.sql = sql;
|
| 155 |
this.page = 0; |
| 156 |
this.index = 0; |
| 157 |
this.createResulset();
|
| 158 |
|
| 159 |
} |
| 160 |
|
| 161 |
public boolean hasNext(){ |
| 162 |
checkModified(); |
| 163 |
|
| 164 |
|
| 165 |
if (nextChecked){
|
| 166 |
return this.feature != null; |
| 167 |
} |
| 168 |
IFeature feature=null;
|
| 169 |
nextChecked=true;
|
| 170 |
while (true){ |
| 171 |
if (!rsEOF){
|
| 172 |
try {
|
| 173 |
if (rs.isLast()){
|
| 174 |
if (this.index == this.fetchSize){ |
| 175 |
this.index = 0; |
| 176 |
this.page++;
|
| 177 |
this.createResulset();
|
| 178 |
if (rs.isLast()){
|
| 179 |
rsEOF = true;
|
| 180 |
rs.close(); |
| 181 |
continue;
|
| 182 |
} |
| 183 |
} else{
|
| 184 |
rsEOF = true;
|
| 185 |
rs.close(); |
| 186 |
continue;
|
| 187 |
} |
| 188 |
} else {
|
| 189 |
feature=nextFeature(); |
| 190 |
if(featureManager.isDeleted(feature))
|
| 191 |
continue;
|
| 192 |
this.feature=feature;
|
| 193 |
return true; |
| 194 |
|
| 195 |
} |
| 196 |
} catch (java.sql.SQLException e) {
|
| 197 |
throw new RuntimeException( |
| 198 |
new ReadException(this.store.getName(),e) |
| 199 |
); |
| 200 |
} catch (ReadException e) {
|
| 201 |
throw new RuntimeException(e); |
| 202 |
} |
| 203 |
|
| 204 |
}else {
|
| 205 |
return false; |
| 206 |
|
| 207 |
} |
| 208 |
|
| 209 |
|
| 210 |
} |
| 211 |
} |
| 212 |
|
| 213 |
public Object next() { |
| 214 |
checkModified(); |
| 215 |
if (!nextChecked){
|
| 216 |
hasNext(); |
| 217 |
} |
| 218 |
if (this.feature == null) |
| 219 |
throw new NoSuchElementException(); |
| 220 |
nextChecked=false;
|
| 221 |
IFeature feature = this.feature;
|
| 222 |
this.feature = null; |
| 223 |
return feature;
|
| 224 |
} |
| 225 |
|
| 226 |
private IFeature nextFeature() {
|
| 227 |
IFeature feature=null;
|
| 228 |
try {
|
| 229 |
if(rs.next()){
|
| 230 |
feature=this.store.createFeatureFromResulset(this.rs, featureType); |
| 231 |
} |
| 232 |
} catch (java.sql.SQLException e) {
|
| 233 |
throw new RuntimeException( |
| 234 |
new ReadException(this.store.getName(),e) |
| 235 |
); |
| 236 |
} catch (ReadException e) {
|
| 237 |
throw new RuntimeException(e); |
| 238 |
} |
| 239 |
return feature;
|
| 240 |
} |
| 241 |
|
| 242 |
public void remove() { |
| 243 |
throw new UnsupportedOperationException(); |
| 244 |
} |
| 245 |
|
| 246 |
|
| 247 |
protected void createResulset() throws ReadException{ |
| 248 |
|
| 249 |
this.store.open();
|
| 250 |
|
| 251 |
String mSql = PostgresqlStoreUtils.addLimitsToSQL(
|
| 252 |
this.sql,
|
| 253 |
this.fetchSize,
|
| 254 |
this.page);
|
| 255 |
Connection conn = ((PostgresqlStore)this.store).getConnection(); |
| 256 |
try {
|
| 257 |
if (this.rs != null){ |
| 258 |
this.rs.close();
|
| 259 |
} |
| 260 |
|
| 261 |
Statement st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
| 262 |
this.rs = st.executeQuery(mSql);
|
| 263 |
|
| 264 |
} catch (java.sql.SQLException e) {
|
| 265 |
throw new SQLException(mSql,this.store.getName(),e); |
| 266 |
} |
| 267 |
|
| 268 |
|
| 269 |
} |
| 270 |
|
| 271 |
} |
| 272 |
|
| 273 |
|
| 274 |
protected class IteratorMemory implements Iterator{ |
| 275 |
protected long position=0; |
| 276 |
private boolean nextChecked=false; |
| 277 |
private IFeature feature;
|
| 278 |
private FeatureManager featureManager;
|
| 279 |
|
| 280 |
public IteratorMemory(DBFeatureType featureType,FeatureManager featureManager){
|
| 281 |
this.featureManager= featureManager;
|
| 282 |
position=0;
|
| 283 |
} |
| 284 |
|
| 285 |
public boolean hasNext(){ |
| 286 |
checkModified(); |
| 287 |
|
| 288 |
|
| 289 |
if (nextChecked){
|
| 290 |
return this.feature != null; |
| 291 |
} |
| 292 |
IFeature feature=null;
|
| 293 |
nextChecked=true;
|
| 294 |
while (true){ |
| 295 |
if (position<featureManager.getNum()){
|
| 296 |
try {
|
| 297 |
feature=featureManager.getFeature((int)position,store);
|
| 298 |
} catch (ReadException e) {
|
| 299 |
throw new RuntimeException(e); |
| 300 |
} |
| 301 |
position++; |
| 302 |
|
| 303 |
}else{
|
| 304 |
this.feature = null; |
| 305 |
return false; |
| 306 |
} |
| 307 |
|
| 308 |
if(featureManager.isDeleted(feature))
|
| 309 |
continue;
|
| 310 |
|
| 311 |
if (filter == null) { |
| 312 |
this.feature=feature;
|
| 313 |
return true; |
| 314 |
|
| 315 |
} else {
|
| 316 |
try {
|
| 317 |
if (parser.match(feature)){
|
| 318 |
this.feature=feature;
|
| 319 |
return true; |
| 320 |
}else{
|
| 321 |
continue;
|
| 322 |
} |
| 323 |
} catch (Exception e) { |
| 324 |
throw new RuntimeException(e); |
| 325 |
} |
| 326 |
} |
| 327 |
} |
| 328 |
} |
| 329 |
|
| 330 |
public Object next() { |
| 331 |
checkModified(); |
| 332 |
if (!nextChecked){
|
| 333 |
hasNext(); |
| 334 |
} |
| 335 |
if (this.feature == null) |
| 336 |
throw new NoSuchElementException(); |
| 337 |
nextChecked=false;
|
| 338 |
IFeature feature = this.feature;
|
| 339 |
this.feature = null; |
| 340 |
return feature;
|
| 341 |
} |
| 342 |
|
| 343 |
public void remove() { |
| 344 |
throw new UnsupportedOperationException(); |
| 345 |
} |
| 346 |
} |
| 347 |
|
| 348 |
|
| 349 |
public void dispose() { |
| 350 |
this.store.deleteObserver(this); |
| 351 |
this.store = null; |
| 352 |
this.featureManager = null; |
| 353 |
this.featureType = null; |
| 354 |
this.parser= null; |
| 355 |
|
| 356 |
} |
| 357 |
|
| 358 |
} |