svn-gvsig-desktop / trunk / libraries / libDataSourceDBBaseDrivers / src / org / gvsig / data / datastores / vectorial / db / jdbc / postgresqlbin / PostgresqlBinFeatureCollection.java @ 20058
History | View | Annotate | Download (7.38 KB)
1 |
package org.gvsig.data.datastores.vectorial.db.jdbc.postgresqlbin; |
---|---|
2 |
|
3 |
import java.sql.Connection; |
4 |
import java.sql.ResultSet; |
5 |
import java.sql.Statement; |
6 |
import java.util.Iterator; |
7 |
import java.util.NoSuchElementException; |
8 |
|
9 |
import org.gvsig.data.datastores.vectorial.db.DBFeatureType; |
10 |
import org.gvsig.data.datastores.vectorial.db.jdbc.AbstractJDBCDataFeatureCollection; |
11 |
import org.gvsig.data.datastores.vectorial.db.jdbc.JDBCStore; |
12 |
import org.gvsig.data.datastores.vectorial.db.jdbc.exception.SQLException; |
13 |
import org.gvsig.data.exception.ReadException; |
14 |
import org.gvsig.data.vectorial.AbstractFeatureCollection; |
15 |
import org.gvsig.data.vectorial.IFeature; |
16 |
import org.gvsig.data.vectorial.IFeatureAttributeDescriptor; |
17 |
import org.gvsig.data.vectorial.IFeatureType; |
18 |
import org.gvsig.exceptions.BaseException; |
19 |
|
20 |
import com.iver.cit.gvsig.fmap.drivers.WKBParser2; |
21 |
|
22 |
public class PostgresqlBinFeatureCollection extends AbstractJDBCDataFeatureCollection { |
23 |
protected DBFeatureType featureType;
|
24 |
protected String filter; |
25 |
protected String totalFilter; |
26 |
protected PostgresqlBinStore store;
|
27 |
private String order; |
28 |
private int numReg=-1; |
29 |
private String sql; |
30 |
private String sqlCount; |
31 |
private String totalOrder; |
32 |
private int fetchSize=5000; |
33 |
|
34 |
public PostgresqlBinFeatureCollection(PostgresqlBinStore store,IFeatureType type, String filter, String order) { |
35 |
this.store=store;
|
36 |
this.featureType=(DBFeatureType)type;
|
37 |
this.filter=filter;
|
38 |
this.order=order;
|
39 |
this.calculateWhere();
|
40 |
this.calculateOrder();
|
41 |
|
42 |
if (store.isUseSqlSource()){
|
43 |
this.sql = store.getSqlSource();
|
44 |
this.sqlCount = null; |
45 |
} else {
|
46 |
this.sql = this.store.getSqlSelectPart(); |
47 |
|
48 |
this.sqlCount = "Select count(*) From "+ ((PostgresqlBinStoreParameters)this.store.getParameters()).tableID(); |
49 |
if (!isStringEmpty(this.totalFilter)){ |
50 |
this.sql= this.sql + " Where " + this.totalFilter; |
51 |
this.sqlCount= this.sqlCount + " Where " + this.totalFilter; |
52 |
} |
53 |
if (!isStringEmpty(this.totalOrder)){ |
54 |
this.sql= this.sql + " Order by " + this.totalOrder; |
55 |
} |
56 |
} |
57 |
} |
58 |
|
59 |
private ResultSet getNewResulset(String aSql) throws ReadException{ |
60 |
this.store.open();
|
61 |
|
62 |
Connection conn = this.store.getCurrentConnection(); |
63 |
try {
|
64 |
Statement st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
65 |
return st.executeQuery(aSql);
|
66 |
|
67 |
} catch (java.sql.SQLException e) {
|
68 |
throw new SQLException(aSql,this.store.getName(),e); |
69 |
} |
70 |
|
71 |
} |
72 |
|
73 |
|
74 |
private void calculateWhere(){ |
75 |
if (isStringEmpty(this.store.getBaseWhereClause())){ |
76 |
this.totalFilter = this.filter; |
77 |
} else {
|
78 |
this.totalFilter = "(" + this.store.getBaseWhereClause() + ") and " +this.filter; |
79 |
} |
80 |
} |
81 |
|
82 |
private void calculateOrder(){ |
83 |
if (isStringEmpty(this.store.getBaseOrder())){ |
84 |
this.totalOrder = this.order; |
85 |
} else {
|
86 |
this.totalOrder = this.store.getBaseOrder() + ", " +this.order; |
87 |
} |
88 |
|
89 |
} |
90 |
|
91 |
public int size() { |
92 |
try {
|
93 |
if (this.numReg < 0){ |
94 |
ResultSet r=null; |
95 |
try {
|
96 |
if (this.sqlCount != null){ |
97 |
r = this.getNewResulset(this.sqlCount); |
98 |
r.next(); |
99 |
numReg = r.getInt(1);
|
100 |
} else{
|
101 |
this.numReg = 0; |
102 |
r = this.getNewResulset(this.sql); |
103 |
while (r.next()){
|
104 |
this.numReg++;
|
105 |
} |
106 |
} |
107 |
} catch (java.sql.SQLException e) {
|
108 |
throw new ReadException(this.store.getName(),e); |
109 |
|
110 |
} finally{
|
111 |
try {
|
112 |
if (r != null) |
113 |
r.close(); |
114 |
} catch (java.sql.SQLException e) {
|
115 |
throw new ReadException(this.store.getName(),e); |
116 |
} |
117 |
} |
118 |
} |
119 |
return numReg;
|
120 |
} catch (BaseException e){
|
121 |
throw new RuntimeException(e); |
122 |
} |
123 |
|
124 |
} |
125 |
|
126 |
public Iterator iterator() { |
127 |
|
128 |
H2Iterator dbfIter; |
129 |
try {
|
130 |
dbfIter=new H2Iterator(this.store,this.featureType,this.sql,this.fetchSize); |
131 |
} catch (ReadException e) {
|
132 |
throw new RuntimeException(e); |
133 |
} |
134 |
|
135 |
return dbfIter;
|
136 |
} |
137 |
|
138 |
protected class H2Iterator implements Iterator{ |
139 |
private ResultSet rs; |
140 |
private PostgresqlBinStore store;
|
141 |
private DBFeatureType featureType;
|
142 |
private String sql; |
143 |
private String cursorName; |
144 |
private int fetchSize; |
145 |
private int page; |
146 |
private int index; |
147 |
|
148 |
public H2Iterator(PostgresqlBinStore store,DBFeatureType featureType ,String sql,int fetchSize) throws ReadException{ |
149 |
this.sql = sql;
|
150 |
this.store = store;
|
151 |
this.featureType = featureType;
|
152 |
this.fetchSize= fetchSize;
|
153 |
this.index = 0; |
154 |
this.createCursor();
|
155 |
this.createResulset();
|
156 |
} |
157 |
|
158 |
protected void createCursor() throws ReadException { |
159 |
//Comprobar que no se ha inicializado
|
160 |
this.store.open();
|
161 |
Connection conn = this.store.getCurrentConnection(); |
162 |
String mSql= null; |
163 |
|
164 |
try {
|
165 |
|
166 |
Statement st = conn.createStatement();
|
167 |
|
168 |
this.cursorName = PostgresqlBinStoreUtils.createCursorName();
|
169 |
mSql="BEGIN";
|
170 |
st.execute(mSql); |
171 |
mSql="declare " + this.cursorName + " binary cursor for " + this.sql; |
172 |
st.execute("msql");
|
173 |
// System.out.println(mSql);
|
174 |
|
175 |
|
176 |
} catch (java.sql.SQLException e) {
|
177 |
throw new SQLException(mSql,this.store.getName(),e); |
178 |
} |
179 |
|
180 |
|
181 |
} |
182 |
|
183 |
protected void createResulset() throws ReadException{ |
184 |
|
185 |
this.store.open();
|
186 |
|
187 |
String mSql = "fetch forward " + this.fetchSize + " in " |
188 |
+ this.cursorName;
|
189 |
Connection conn = this.store.getCurrentConnection(); |
190 |
try {
|
191 |
if (this.rs != null){ |
192 |
this.rs.close();
|
193 |
this.rs.getStatement().close();
|
194 |
} |
195 |
|
196 |
Statement st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY); |
197 |
// System.out.println(mSql);
|
198 |
this.rs = st.executeQuery(mSql);
|
199 |
|
200 |
} catch (java.sql.SQLException e) {
|
201 |
throw new SQLException(mSql,this.store.getName(),e); |
202 |
} |
203 |
|
204 |
|
205 |
} |
206 |
|
207 |
public boolean hasNext(){ |
208 |
checkModified(); |
209 |
try {
|
210 |
if (rs.isLast()){
|
211 |
if (this.index == this.fetchSize){ |
212 |
this.index = 0; |
213 |
this.createResulset();
|
214 |
return this.hasNext(); |
215 |
} else{
|
216 |
this.close();
|
217 |
return false; |
218 |
} |
219 |
|
220 |
} else {
|
221 |
return true; |
222 |
} |
223 |
} catch (java.sql.SQLException e) {
|
224 |
throw new RuntimeException( |
225 |
new ReadException(this.store.getName(),e) |
226 |
); |
227 |
} catch (ReadException e1){
|
228 |
throw new RuntimeException( |
229 |
new ReadException(this.store.getName(),e1) |
230 |
); |
231 |
} |
232 |
} |
233 |
|
234 |
public Object next() { |
235 |
checkModified(); |
236 |
if (!hasNext())
|
237 |
throw new NoSuchElementException(); |
238 |
return nextFeature();
|
239 |
} |
240 |
|
241 |
private IFeature nextFeature() {
|
242 |
try {
|
243 |
IFeature feature=null;
|
244 |
try {
|
245 |
if(rs.next()){
|
246 |
feature = this.store.createFeatureFromResulset(this.rs, this.featureType); |
247 |
} else {
|
248 |
this.close();
|
249 |
throw new NoSuchElementException(); |
250 |
} |
251 |
if (rs.isAfterLast()){
|
252 |
this.close();
|
253 |
} |
254 |
|
255 |
|
256 |
} catch (java.sql.SQLException e) {
|
257 |
throw new RuntimeException( |
258 |
new ReadException(this.store.getName(),e) |
259 |
); |
260 |
} |
261 |
this.index++;
|
262 |
return feature;
|
263 |
} catch (BaseException e){
|
264 |
throw new RuntimeException( |
265 |
new ReadException(this.store.getName(),e) |
266 |
); |
267 |
|
268 |
} |
269 |
} |
270 |
|
271 |
public void remove() { |
272 |
throw new UnsupportedOperationException(); |
273 |
} |
274 |
|
275 |
private void close(){ |
276 |
if (rs == null) |
277 |
return;
|
278 |
try {
|
279 |
rs.close(); |
280 |
rs.getStatement().close(); |
281 |
} catch (java.sql.SQLException e) {
|
282 |
// TODO Auto-generated catch block
|
283 |
e.printStackTrace(); |
284 |
} finally{
|
285 |
Statement st;
|
286 |
try {
|
287 |
Connection conn = this.store.getCurrentConnection(); |
288 |
st = conn.createStatement(); |
289 |
st.execute("Rollback");
|
290 |
} catch (java.sql.SQLException e) {
|
291 |
// TODO Auto-generated catch block
|
292 |
e.printStackTrace(); |
293 |
} |
294 |
|
295 |
|
296 |
} |
297 |
|
298 |
|
299 |
} |
300 |
|
301 |
} |
302 |
|
303 |
public void dispose() { |
304 |
this.store.deleteObserver(this); |
305 |
this.store=null; |
306 |
this.featureType=null; |
307 |
|
308 |
} |
309 |
|
310 |
} |