svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / operations / FetchFeatureProviderByReferenceOperation.java @ 43093
History | View | Annotate | Download (4.16 KB)
1 |
|
---|---|
2 |
package org.gvsig.fmap.dal.store.jdbc2.spi.operations; |
3 |
|
4 |
import java.sql.Connection; |
5 |
import java.sql.PreparedStatement; |
6 |
import java.sql.ResultSet; |
7 |
import java.sql.SQLException; |
8 |
import org.gvsig.fmap.dal.exception.DataException; |
9 |
import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
10 |
import org.gvsig.fmap.dal.feature.FeatureType; |
11 |
import org.gvsig.fmap.dal.feature.spi.FeatureProvider; |
12 |
import org.gvsig.fmap.dal.feature.spi.FeatureReferenceProviderServices; |
13 |
import org.gvsig.fmap.dal.store.jdbc.exception.JDBCSQLException; |
14 |
import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper; |
15 |
import org.gvsig.fmap.dal.store.jdbc2.JDBCUtils; |
16 |
import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
17 |
import org.gvsig.fmap.geom.DataTypes; |
18 |
|
19 |
|
20 |
public class FetchFeatureProviderByReferenceOperation extends AbstractConnectionOperation { |
21 |
private final FeatureType featureType; |
22 |
private final FeatureReferenceProviderServices reference; |
23 |
private final String schema; |
24 |
private final String table; |
25 |
private final String database; |
26 |
|
27 |
public FetchFeatureProviderByReferenceOperation(
|
28 |
JDBCHelper helper, |
29 |
FeatureReferenceProviderServices reference, |
30 |
FeatureType featureType, |
31 |
String database,
|
32 |
String schema,
|
33 |
String table
|
34 |
) { |
35 |
super(helper);
|
36 |
this.reference = reference;
|
37 |
this.database = database;
|
38 |
this.schema = schema;
|
39 |
this.table = table;
|
40 |
this.featureType = featureType;
|
41 |
} |
42 |
|
43 |
@Override
|
44 |
public final Object perform(Connection conn) throws DataException { |
45 |
FeatureProvider feature = fetchFeatureProviderByReference( |
46 |
conn, |
47 |
reference, |
48 |
featureType, |
49 |
database, |
50 |
schema, |
51 |
table |
52 |
); |
53 |
return feature;
|
54 |
} |
55 |
|
56 |
public FeatureProvider fetchFeatureProviderByReference(
|
57 |
Connection conn,
|
58 |
FeatureReferenceProviderServices reference, |
59 |
// FeatureType storeType,
|
60 |
FeatureType featureType, |
61 |
String database,
|
62 |
String schema,
|
63 |
String table
|
64 |
) throws DataException {
|
65 |
|
66 |
// FeatureAttributeDescriptor[] primaryKey = storeType.getPrimaryKey();
|
67 |
String[] primaryKeys = reference.getKeyNames(); |
68 |
|
69 |
JDBCSQLBuilderBase sqlbuilder = this.createSQLBuilder();
|
70 |
|
71 |
for (FeatureAttributeDescriptor attr : featureType) {
|
72 |
if( attr.getType()==DataTypes.GEOMETRY ) {
|
73 |
sqlbuilder.select().column().name(attr.getName()).as_geometry(); |
74 |
} else {
|
75 |
sqlbuilder.select().column().name(attr.getName()); |
76 |
} |
77 |
} |
78 |
sqlbuilder.select().from().table().database(database).schema(schema).name(table); |
79 |
for (String name : primaryKeys ) { |
80 |
if( !sqlbuilder.select().has_column(name) ) {
|
81 |
sqlbuilder.select().column().name(name); |
82 |
} |
83 |
Object value = reference.getKeyValue(name);
|
84 |
if( value == null ) { |
85 |
sqlbuilder.select().where().and( |
86 |
sqlbuilder.isNull(sqlbuilder.column(name)) |
87 |
); |
88 |
} else {
|
89 |
sqlbuilder.select().where().and( |
90 |
sqlbuilder.eq( |
91 |
sqlbuilder.column(name), |
92 |
sqlbuilder.parameter(name).value(value) |
93 |
) |
94 |
); |
95 |
} |
96 |
} |
97 |
sqlbuilder.select().limit(1);
|
98 |
|
99 |
String sql = sqlbuilder.select().toString();
|
100 |
|
101 |
PreparedStatement st = null; |
102 |
ResultSet rs = null; |
103 |
try {
|
104 |
st = conn.prepareStatement(sql); |
105 |
sqlbuilder.setParameters(st); |
106 |
rs = JDBCUtils.executeQuery(st, sql); |
107 |
if (!rs.next()) {
|
108 |
return null; |
109 |
} |
110 |
FeatureProvider data = this.helper.createFeature(featureType);
|
111 |
this.helper.fetchFeature(data, rs);
|
112 |
return data;
|
113 |
|
114 |
} catch (SQLException ex) { |
115 |
throw new JDBCSQLException(ex); |
116 |
} finally {
|
117 |
JDBCUtils.closeQuietly(st); |
118 |
JDBCUtils.closeQuietly(rs); |
119 |
} |
120 |
} |
121 |
|
122 |
} |