/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.data.oracle;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import oracle.jdbc.OracleConnection;
import oracle.sql.STRUCT;
import org.geotools.data.jdbc.FilterToSQL;
import org.geotools.data.jdbc.datasource.DataSourceFinder;
import org.geotools.data.jdbc.datasource.UnWrapper;
import org.geotools.data.oracle.sdo.GeometryConverter;
import org.geotools.data.oracle.sdo.SDOSqlDumper;
import org.geotools.data.oracle.sdo.TT;
import org.geotools.factory.Hints;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.jdbc.JDBCDataStore;
import org.geotools.jdbc.PreparedFilterToSQL;
import org.geotools.jdbc.PreparedStatementSQLDialect;
import org.geotools.referencing.CRS;
import org.geotools.util.SoftValueHashMap;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
import org.opengis.feature.type.GeometryDescriptor;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.cs.CoordinateSystem;
import org.opengis.referencing.cs.CoordinateSystemAxis;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryCollection;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LineString;
import com.vividsolutions.jts.geom.LinearRing;
import com.vividsolutions.jts.geom.MultiLineString;
import com.vividsolutions.jts.geom.MultiPoint;
import com.vividsolutions.jts.geom.MultiPolygon;
import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.geom.Polygon;
/**
*
* Abstract dialect implementation for Oracle. Subclasses differ on the way used to parse and encode
* the JTS geoemtries into Oracle MDSYS.SDO_GEOMETRY structures.
*
* @author Justin Deoliveira, OpenGEO
* @author Andrea Aime, OpenGEO
*
*
* @source $URL$
*/
public class OracleDialect extends PreparedStatementSQLDialect {
private static final int DEFAULT_AXIS_MAX = 1000000;
private static final int DEFAULT_AXIS_MIN = -10000000;
/**
* Marks a geometry column as geodetic
*/
public static final String GEODETIC = "geodetic";
UnWrapper uw;
/**
* A map from JTS Geometry type to Oracle geometry type. See Oracle Spatial documentation,
* Table 2-1, Valid SDO_GTYPE values.
*/
public static final Map<Class, String> CLASSES_TO_GEOM = Collections.unmodifiableMap(new GeomClasses());
static final class GeomClasses extends HashMap<Class, String> {
private static final long serialVersionUID = -3359664692996608331L;
public GeomClasses() {
super();
put(Point.class, "POINT");
put(LineString.class, "LINE");
put(LinearRing.class, "LINE");
put(Polygon.class, "POLYGON");
put(GeometryCollection.class, "COLLECTION");
put(MultiPoint.class, "MULTIPOINT");
put(MultiLineString.class, "MULTILINE");
put(MultiPolygon.class, "MULTIPOLYGON");
}
}
static final Map<String, Class> TYPES_TO_CLASSES = new HashMap<String, Class>() {
{
put("CHAR", String.class);
put("NCHAR", String.class);
put("NVARCHAR", String.class);
put("NVARCHAR2", String.class);
}
};
/**
* Whether to use only primary filters for BBOX filters
*/
boolean looseBBOXEnabled = false;
/**
* Whether to use estimated extents to build
*/
boolean estimatedExtentsEnabled = false;
/**
* Stores srid and their nature, true if geodetic, false otherwise. Avoids repeated
* accesses to the MDSYS.GEODETIC_SRIDS table
*/
SoftValueHashMap<Integer, Boolean> geodeticCache = new SoftValueHashMap<Integer, Boolean>(20);
/**
* Remembers whether the USER_SDO_* views could be accessed or not
*/
Boolean canAccessUserViews;
public OracleDialect(JDBCDataStore dataStore) {
super(dataStore);
}
public boolean isLooseBBOXEnabled() {
return looseBBOXEnabled;
}
public void setLooseBBOXEnabled(boolean looseBBOXEnabled) {
this.looseBBOXEnabled = looseBBOXEnabled;
}
public boolean isEstimatedExtentsEnabled() {
return estimatedExtentsEnabled;
}
public void setEstimatedExtentsEnabled(boolean estimatedExtenstEnabled) {
this.estimatedExtentsEnabled = estimatedExtenstEnabled;
}
/**
* Checks the user has permissions to read from the USER_SDO_INDEX_METADATA and
* USER_SDO_GEOM_METADATA. The code can use this information to decide to access the
* ALL_SDO_INDEX_METADATA and ALL_SOD_GEOM_METADATA views instead.
* @param cx
* @return
*/
boolean canAccessUserViews(Connection cx) {
if (canAccessUserViews == null) {
Statement st = null;
ResultSet rs = null;
try {
st = cx.createStatement();
String sql = "SELECT * FROM MDSYS.USER_SDO_INDEX_METADATA WHERE ROWNUM < 2";
LOGGER.log(Level.FINE, "Check user can access user metadata views: {0}", sql);
rs = st.executeQuery(sql);
dataStore.closeSafe(rs);
sql = "SELECT * FROM MDSYS.USER_SDO_GEOM_METADATA WHERE ROWNUM < 2";
LOGGER.log(Level.FINE, "Check user can access user metadata views: {0}", sql);
LOGGER.log(Level.FINE, sql);
rs = st.executeQuery(sql);
dataStore.closeSafe(rs);
canAccessUserViews = true;
} catch (SQLException e) {
canAccessUserViews = false;
} finally {
dataStore.closeSafe(st);
dataStore.closeSafe(rs);
}
}
return canAccessUserViews;
}
@Override
public Class<?> getMapping(ResultSet columnMetaData, Connection cx) throws SQLException {
final int TABLE_NAME = 3;
final int COLUMN_NAME = 4;
final int TYPE_NAME = 6;
String typeName = columnMetaData.getString(TYPE_NAME);
if (typeName.equals("SDO_GEOMETRY")) {
String tableName = columnMetaData.getString(TABLE_NAME);
String columnName = columnMetaData.getString(COLUMN_NAME);
String schema = dataStore.getDatabaseSchema();
if (canAccessUserViews(cx)) {
//we only try this block if we are able to access the
//user_sdo views
//setup the sql to use for the USER_SDO table
String userSdoSqlStatement = "SELECT META.SDO_LAYER_GTYPE\n" +
"FROM ALL_INDEXES INFO\n" +
"INNER JOIN MDSYS.USER_SDO_INDEX_METADATA META\n" +
"ON INFO.INDEX_NAME = META.SDO_INDEX_NAME\n" +
"WHERE INFO.TABLE_NAME = '" + tableName + "'\n" +
"AND REPLACE(meta.sdo_column_name, '\"') = '" + columnName + "'\n";
if(schema != null && !"".equals(schema)) {
userSdoSqlStatement += " AND INFO.TABLE_OWNER = '" + schema + "'";
}
Statement userSdoStatement = null;
ResultSet userSdoResult = null;
try {
userSdoStatement = cx.createStatement();
LOGGER.log(Level.FINE, "Geometry type check; {0} ", userSdoSqlStatement);
userSdoResult = userSdoStatement.executeQuery(userSdoSqlStatement);
if (userSdoResult.next()) {
String gType = userSdoResult.getString(1);
Class geometryClass = (Class) TT.GEOM_CLASSES.get(gType);
if(geometryClass == null)
geometryClass = Geometry.class;
return geometryClass;
}
} finally {
dataStore.closeSafe(userSdoResult);
dataStore.closeSafe(userSdoStatement);
}
}
Statement allSdoStatement = null;
ResultSet allSdoResult = null;
try {
//setup the sql to use for the ALL_SDO table
String allSdoSqlStatement = "SELECT META.SDO_LAYER_GTYPE\n" +
"FROM ALL_INDEXES INFO\n" +
"INNER JOIN MDSYS.ALL_SDO_INDEX_METADATA META\n" +
"ON INFO.INDEX_NAME = META.SDO_INDEX_NAME\n" +
"WHERE INFO.TABLE_NAME = '" + tableName + "'\n" +
"AND REPLACE(meta.sdo_column_name, '\"') = '" + columnName + "'\n";
if(schema != null && !"".equals(schema)) {
allSdoSqlStatement += " AND INFO.TABLE_OWNER = '" + schema + "'";
allSdoSqlStatement += " AND META.SDO_INDEX_OWNER = '" + schema + "'";
}
allSdoStatement = cx.createStatement();
LOGGER.log(Level.FINE, "Geometry type check; {0} ", allSdoSqlStatement);
allSdoResult = allSdoStatement.executeQuery(allSdoSqlStatement);
if (allSdoResult.next()) {
String gType = allSdoResult.getString(1);
Class geometryClass = (Class) TT.GEOM_CLASSES.get(gType);
if(geometryClass == null)
geometryClass = Geometry.class;
return geometryClass;
} else {
//must default at this point, this is as far as we can go
return Geometry.class;
}
} finally {
dataStore.closeSafe(allSdoResult);
dataStore.closeSafe(allSdoStatement);
}
} else {
// if we know, return non null value, otherwise returning
// null will force the datatore to figure it out using
// jdbc metadata
return TYPES_TO_CLASSES.get(typeName);
}
}
@Override
public boolean includeTable(String schemaName, String tableName, Connection cx)
throws SQLException {
if (tableName.endsWith("$")) {
return false;
} else if (tableName.startsWith("BIN$")) { // Added to ignore some Oracle 10g tables
return false;
} else if (tableName.startsWith("XDB$")) {
return false;
} else if (tableName.startsWith("DR$")) {
return false;
} else if (tableName.startsWith("DEF$")) {
return false;
} else if (tableName.startsWith("SDO_")) {
return false;
} else if (tableName.startsWith("WM$")) {
return false;
} else if (tableName.startsWith("WK$")) {
return false;
} else if (tableName.startsWith("AW$")) {
return false;
} else if (tableName.startsWith("AQ$")) {
return false;
} else if (tableName.startsWith("APPLY$")) {
return false;
} else if (tableName.startsWith("REPCAT$")) {
return false;
} else if (tableName.startsWith("CWM$")) {
return false;
} else if (tableName.startsWith("CWM2$")) {
return false;
} else if (tableName.startsWith("EXF$")) {
return false;
} else if (tableName.startsWith("DM$")) {
return false;
}
return true;
}
public void registerSqlTypeNameToClassMappings(
Map<String, Class<?>> mappings) {
super.registerSqlTypeNameToClassMappings(mappings);
mappings.put( "SDO_GEOMETRY", Geometry.class );
mappings.put( "MDSYS.SDO_GEOMETRY", Geometry.class );
}
@Override
public String getNameEscape() {
return "";
}
@Override
public void encodeColumnName(String raw, StringBuffer sql) {
raw = raw.toUpperCase();
if(raw.length() > 30)
raw = raw.substring(0, 30);
sql.append(raw);
}
@Override
public void encodeTableName(String raw, StringBuffer sql) {
raw = raw.toUpperCase();
if(raw.length() > 30)
raw = raw.substring(0, 30);
sql.append(raw);
}
@Override
public String getGeometryTypeName(Integer type) {
return "MDSYS.SDO_GEOMETRY";
}
@Override
public Envelope decodeGeometryEnvelope(ResultSet rs, int column, Connection cx )
throws SQLException, IOException {
Geometry geom = readGeometry(rs, column, new GeometryFactory(), cx);
return geom != null ? geom.getEnvelopeInternal() : null;
}
@Override
public Geometry decodeGeometryValue(GeometryDescriptor descriptor,
ResultSet rs, String column, GeometryFactory factory, Connection cx )
throws IOException, SQLException {
// read the geometry
Geometry geom = readGeometry( rs, column, factory, cx );
return convertGeometry(geom, descriptor, factory);
}
public Geometry decodeGeometryValue(GeometryDescriptor descriptor, ResultSet rs, int column, GeometryFactory factory, Connection cx) throws IOException ,SQLException {
// read the geometry
Geometry geom = readGeometry( rs, column, factory, cx );
return convertGeometry(geom, descriptor, factory);
};
Geometry convertGeometry(Geometry geom, GeometryDescriptor descriptor, GeometryFactory factory) {
//if the geometry is null no need to convert it
if(geom == null) {
return null;
}
// grab the binding
Class targetClazz = descriptor.getType().getBinding();
// in Oracle you can have polygons in a column declared to be multipolygon, and so on...
// so we better convert geometries, since our feature model is not so lenient
if(targetClazz.equals(MultiPolygon.class) && geom instanceof Polygon){
return factory.createMultiPolygon(new Polygon[] {(Polygon) geom});
}
else if(targetClazz.equals(MultiPoint.class) && geom instanceof Point) {
return factory.createMultiPoint(new Point[] {(Point) geom});
}
else if(targetClazz.equals(MultiLineString.class) && geom instanceof LineString) {
return factory.createMultiLineString(new LineString[] {(LineString) geom});
}
else if(targetClazz.equals(GeometryCollection.class)) {
return factory.createGeometryCollection(new Geometry[] {geom});
}
return geom;
}
Geometry readGeometry(ResultSet rs, String column, GeometryFactory factory, Connection cx)
throws IOException, SQLException {
return readGeometry(rs.getObject(column), factory, cx);
}
Geometry readGeometry(ResultSet rs, int column, GeometryFactory factory, Connection cx)
throws IOException, SQLException {
return readGeometry(rs.getObject(column), factory, cx);
}
Geometry readGeometry(Object struct, GeometryFactory factory, Connection cx)
throws IOException, SQLException {
if (struct == null) {
return null;
}
// unwrap the connection and create a converter
OracleConnection ocx = unwrapConnection(cx);
GeometryConverter converter = factory != null ? new GeometryConverter(ocx, factory)
: new GeometryConverter(ocx);
return converter.asGeometry((STRUCT) struct);
}
@Override
public void setGeometryValue(Geometry g, int srid, Class binding, PreparedStatement ps,
int column) throws SQLException {
// Handle the null geometry case.
// Surprisingly, using setNull(column, Types.OTHER) does not work...
if (g == null) {
ps.setNull(column, Types.STRUCT, "MDSYS.SDO_GEOMETRY");
return;
}
OracleConnection ocx = unwrapConnection(ps.getConnection());
GeometryConverter converter = new GeometryConverter(ocx);
STRUCT s = converter.toSDO(g, srid);
ps.setObject(column, s);
if (LOGGER.isLoggable(Level.FINE)) {
String sdo = SDOSqlDumper.toSDOGeom(g, srid);
LOGGER.fine("Setting parameter " + column + " as " + sdo);
}
}
/**
* Obtains the native oracle connection object given a database connecetion.
*
*/
OracleConnection unwrapConnection( Connection cx ) throws SQLException {
if(cx == null)
return null;
if ( cx instanceof OracleConnection ) {
return (OracleConnection) cx;
}
try {
if(uw == null)
uw = DataSourceFinder.getUnWrapper( cx );
if ( uw != null ) {
Connection uwcx = uw.unwrap( cx );
if ( uwcx != null && uwcx instanceof OracleConnection ) {
return (OracleConnection) uwcx;
}
}
} catch(IOException e) {
throw (SQLException) new SQLException(
"Could not obtain native oracle connection.").initCause(e);
}
throw new SQLException( "Could not obtain native oracle connection for " + cx.getClass());
}
public FilterToSQL createFilterToSQL() {
throw new UnsupportedOperationException("This dialect works with prepared statements only");
}
@Override
public PreparedFilterToSQL createPreparedFilterToSQL() {
OracleFilterToSQL sql = new OracleFilterToSQL(this);
sql.setLooseBBOXEnabled(looseBBOXEnabled);
return sql;
}
@Override
public Integer getGeometrySRID(String schemaName, String tableName,
String columnName, Connection cx) throws SQLException {
if (canAccessUserViews(cx)) {
StringBuffer userSdoSql = new StringBuffer("SELECT SRID FROM MDSYS.USER_SDO_GEOM_METADATA WHERE ");
userSdoSql.append( "TABLE_NAME='").append( tableName.toUpperCase() ).append("' AND ");
userSdoSql.append( "COLUMN_NAME='").append( columnName.toUpperCase() ).append( "'");
Statement userSdoStatement = null;
ResultSet userSdoResult = null;
try {
userSdoStatement = cx.createStatement();
LOGGER.log(Level.FINE, "SRID check; {0} ", userSdoSql.toString());
userSdoResult = userSdoStatement.executeQuery(userSdoSql.toString());
if (userSdoResult.next()) {
Object srid = userSdoResult.getObject( 1 );
if ( srid != null ) {
//return the SRID number if it was found in the USER_SDO
return ((Number) srid).intValue();
}
}
} finally {
dataStore.closeSafe(userSdoResult);
dataStore.closeSafe(userSdoStatement);
}
}
StringBuffer allSdoSql = new StringBuffer("SELECT SRID FROM MDSYS.ALL_SDO_GEOM_METADATA WHERE ");
allSdoSql.append( "TABLE_NAME='").append( tableName.toUpperCase() ).append("' AND ");
allSdoSql.append( "COLUMN_NAME='").append( columnName.toUpperCase() ).append( "'");
if(schemaName != null)
allSdoSql.append(" AND OWNER='" + schemaName + "'");
Statement allSdoStatement = null;
ResultSet allSdoResult = null;
try {
allSdoStatement = cx.createStatement();
LOGGER.log(Level.FINE, "SRID check; {0} ", allSdoSql.toString());
allSdoResult = allSdoStatement.executeQuery(allSdoSql.toString());
if (allSdoResult.next()) {
Object srid = allSdoResult.getObject( 1 );
if ( srid == null ) {
return null;
}
//return the SRID number if it was found in the ALL_SDO
return ((Number) srid).intValue();
} else {
return null;
}
} finally {
dataStore.closeSafe(allSdoResult);
dataStore.closeSafe(allSdoStatement);
}
}
@Override
public CoordinateReferenceSystem createCRS(int srid, Connection cx) throws SQLException {
// if the official EPSG database has an answer, use that one
CoordinateReferenceSystem crs = super.createCRS(srid, cx);
if(crs != null)
return crs;
// otherwise try to decode the WKT, most of the time it's invalid, but
// for new codes they learned the proper WKT syntax
String sql = "SELECT WKTEXT FROM MDSYS.CS_SRS WHERE SRID = " + srid;
Statement st = null;
ResultSet rs = null;
try {
st = cx.createStatement();
rs = st.executeQuery( sql.toString() );
if ( rs.next() ) {
String wkt = rs.getString(1);
if ( wkt != null ) {
try {
return CRS.parseWKT(wkt);
} catch(Exception e) {
if(LOGGER.isLoggable(Level.FINE))
LOGGER.log(Level.FINE, "Could not parse WKT " + wkt, e);
return null;
}
}
}
} finally {
dataStore.closeSafe( rs );
dataStore.closeSafe( st );
}
return null;
}
@Override
public void encodeGeometryEnvelope(String tableName, String geometryColumn, StringBuffer sql) {
sql.append( "SDO_AGGR_MBR(");
encodeColumnName(geometryColumn, sql);
sql.append( ")");
}
@Override
public List<ReferencedEnvelope> getOptimizedBounds(String schema, SimpleFeatureType featureType,
Connection cx) throws SQLException, IOException {
if (!estimatedExtentsEnabled || dataStore.getVirtualTables().get(featureType.getTypeName()) != null)
return null;
String tableName = featureType.getTypeName();
Statement st = null;
ResultSet rs = null;
List<ReferencedEnvelope> result = new ArrayList<ReferencedEnvelope>();
Savepoint savePoint = null;
try {
st = cx.createStatement();
if(!cx.getAutoCommit()) {
savePoint = cx.setSavepoint();
}
for (AttributeDescriptor att : featureType.getAttributeDescriptors()) {
if (att instanceof GeometryDescriptor) {
// use estimated extent (optimizer statistics)
StringBuffer sql = new StringBuffer();
sql.append("select SDO_TUNE.EXTENT_OF('");
sql.append(tableName);
sql.append("', '");
sql.append(att.getName().getLocalPart());
sql.append("') FROM DUAL");
rs = st.executeQuery(sql.toString());
if (rs.next()) {
// decode the geometry
Envelope env = decodeGeometryEnvelope(rs, 1, cx);
// reproject and merge
if (env != null && !env.isNull()) {
CoordinateReferenceSystem crs = ((GeometryDescriptor) att)
.getCoordinateReferenceSystem();
result.add(new ReferencedEnvelope(env, crs));
}
}
rs.close();
}
}
} catch(SQLException e) {
if(savePoint != null) {
cx.rollback(savePoint);
}
LOGGER.log(Level.WARNING, "Failed to use SDO_TUNE.EXTENT_OF, falling back on envelope aggregation", e);
return null;
} finally {
if(savePoint != null) {
cx.rollback(savePoint);
}
dataStore.closeSafe(rs);
dataStore.closeSafe(st);
}
return result;
}
@Override
public void postCreateTable(String schemaName,
SimpleFeatureType featureType, Connection cx) throws SQLException {
String tableName = featureType.getName().getLocalPart().toUpperCase();
Statement st = null;
try {
st = cx.createStatement();
// register all geometry columns in the database
for (AttributeDescriptor att : featureType.getAttributeDescriptors()) {
if(att instanceof GeometryDescriptor) {
GeometryDescriptor geom = (GeometryDescriptor) att;
// guess a tolerance, very small value for geographic data, 10cm for non geographic data
// (is there a better way to guess it?), and an extent.
// This is a hack for the moment, we need to find a better way to guess the extents,
// but unfortunately there is no reliable way to get the extent of a CRS due to
// http://jira.codehaus.org/browse/GEOT-1578
double tolerance;
int dims;
double[] min;
double[] max;
String[] axisNames;
if(geom.getCoordinateReferenceSystem() != null) {
CoordinateSystem cs = geom.getCoordinateReferenceSystem().getCoordinateSystem();
if(geom.getUserData().get(Hints.COORDINATE_DIMENSION) != null) {
dims = ((Number) geom.getUserData().get(Hints.COORDINATE_DIMENSION)).intValue();
} else {
dims = cs.getDimension();
}
min = new double[dims];
max = new double[dims];
axisNames = new String[dims];
double extent = Double.MAX_VALUE;
for (int i = 0; i < dims; i++) {
if(i < cs.getDimension()) {
CoordinateSystemAxis axis = cs.getAxis(i);
axisNames[i] = axis.getAbbreviation();
min[i] = Double.isInfinite(axis.getMinimumValue()) ? DEFAULT_AXIS_MIN : axis.getMinimumValue();
max[i] = Double.isInfinite(axis.getMaximumValue()) ? DEFAULT_AXIS_MAX : axis.getMaximumValue();
if(max[i] - min[i] < extent)
extent = max[i] - min[i];
} else {
min[i] = DEFAULT_AXIS_MIN;
max[i] = 10000000;
}
}
// 1/10M of the extent
tolerance = extent / 10000000;
} else {
// assume fake values for a 2d ref system
dims = 2;
axisNames = new String[2];
min = new double[2];
max = new double[2];
axisNames[0] = "X"; axisNames[1] = "Y";
min[0] = DEFAULT_AXIS_MIN;
min[1] = DEFAULT_AXIS_MIN;
max[0]= 10000000;
max[1] = 10000000;
tolerance = 0.01;
}
int srid = -1;
if(geom.getUserData().get(JDBCDataStore.JDBC_NATIVE_SRID) != null) {
srid = (Integer) geom.getUserData().get(JDBCDataStore.JDBC_NATIVE_SRID);
} else if(geom.getCoordinateReferenceSystem() != null) {
try {
Integer result = CRS.lookupEpsgCode(geom.getCoordinateReferenceSystem(), true);
if(result != null)
srid = result;
} catch(Exception e) {
LOGGER.log(Level.FINE, "Error looking up the epsg code for metadata insertion, assuming -1", e);
}
}
// register the metadata
String geomColumnName = geom.getLocalName().toUpperCase();
String sql = "INSERT INTO USER_SDO_GEOM_METADATA" //
+ "(TABLE_NAME, COLUMN_NAME, DIMINFO, SRID)\n" //
+ "VALUES (\n" //
+ "'" + tableName + "',\n" //
+ "'" + geomColumnName + "',\n" //
+ "MDSYS.SDO_DIM_ARRAY(\n";
for (int i = 0; i < dims; i++) {
sql += " MDSYS.SDO_DIM_ELEMENT('" + axisNames[i] + "', "+ min[i] + ", " + max[i] +", " + tolerance + ")";
if(i < dims - 1)
sql += ", ";
sql += "\n";
}
sql = sql + "),\n" //
+ (srid == -1 ? "NULL" : String.valueOf(srid)) + ")";
LOGGER.log(Level.FINE, "Creating metadata with sql: {0}", sql);
st.execute(sql);
// figure out the index dimension -> for geodetic data 11G accepts only 2d index,
// even if the data is 3d
int idxDim = isGeodeticSrid(srid, cx) ? 2 : dims;
// create the spatial index (or we won't be able to run spatial predicates)
String type = CLASSES_TO_GEOM.get(geom.getType().getBinding());
String idxName = tableName + "_" + geomColumnName + "_IDX";
sql = "CREATE INDEX " //
+ idxName + " ON \"" //
+ tableName + "\"(\"" + geomColumnName + "\")" //
+ " INDEXTYPE IS MDSYS.SPATIAL_INDEX" //
+ " PARAMETERS ('SDO_INDX_DIMS=" + idxDim;
if(type != null)
sql += " LAYER_GTYPE=\"" + type + "\"')";
else
sql += "')";
LOGGER.log(Level.FINE, "Creating index with sql: {0}", sql);
st.execute(sql);
}
}
} finally {
dataStore.closeSafe(st);
}
}
@Override
public String getSequenceForColumn(String schemaName, String tableName,
String columnName, Connection cx) throws SQLException {
String sequenceName = (tableName + "_" + columnName + "_SEQUENCE").toUpperCase();
Statement st = cx.createStatement();
try {
// check the user owned sequences
ResultSet rs = st.executeQuery( "SELECT * FROM USER_SEQUENCES" +
" WHERE SEQUENCE_NAME = '" + sequenceName + "'");
try {
if ( rs.next() ) {
return sequenceName;
}
} finally {
dataStore.closeSafe( rs );
}
dataStore.closeSafe( rs );
// that did not work, let's see if the sequence is available in someone else schema
rs = st.executeQuery( "SELECT * FROM ALL_SEQUENCES" +
" WHERE SEQUENCE_NAME = '" + sequenceName + "'");
try {
if ( rs.next() ) {
String schema = rs.getString("OWNER");
return schema + "." + sequenceName;
}
} finally {
dataStore.closeSafe( rs );
}
} finally {
dataStore.closeSafe( st );
}
return null;
}
@Override
public Object getNextSequenceValue(String schemaName, String sequenceName,
Connection cx) throws SQLException {
Statement st = cx.createStatement();
try {
ResultSet rs = st.executeQuery( "SELECT " + sequenceName + ".NEXTVAL FROM DUAL");
try {
rs.next();
return rs.getInt( 1 );
}
finally {
dataStore.closeSafe( rs );
}
}
finally {
dataStore.closeSafe( st );
}
}
/**
* Checks if the specified srid is geodetic or not
* @throws SQLException
*/
protected boolean isGeodeticSrid(Integer srid, Connection cx) {
if (srid == null)
return false;
Boolean geodetic = geodeticCache.get(srid);
if(geodetic == null) {
synchronized (this) {
geodetic = geodeticCache.get(srid);
if(geodetic == null) {
PreparedStatement ps = null;
ResultSet rs = null;
boolean closeConnection = false;
try {
ps = cx.prepareStatement("SELECT COUNT(*) FROM MDSYS.GEODETIC_SRIDS WHERE SRID = ?");
ps.setInt(1, srid);
rs = ps.executeQuery();
rs.next();
geodetic = rs.getInt(1) > 0;
geodeticCache.put(srid, geodetic);
} catch(SQLException e) {
LOGGER.log(Level.WARNING, "Could not evaluate if the SRID " + srid + " is geodetic", e);
} finally {
dataStore.closeSafe(rs);
dataStore.closeSafe(ps);
if(closeConnection)
dataStore.closeSafe(cx);
}
}
}
}
return geodetic;
}
@Override
public boolean isLimitOffsetSupported() {
return true;
}
@Override
public void applyLimitOffset(StringBuffer sql, int limit, int offset) {
// see http://progcookbook.blogspot.com/2006/02/using-rownum-properly-for-pagination.html
// and http://www.oracle.com/technology/oramag/oracle/07-jan/o17asktom.html
// to understand why we are going thru such hoops in order to get it working
// The same techinique is used in Hibernate to support pagination
if(offset == 0) {
// top-n query: select * from (your_query) where rownum <= n;
sql.insert(0, "SELECT * FROM (");
sql.append(") WHERE ROWNUM <= " + limit);
} else {
// find results between N and M
// select * from
// ( select rownum rnum, a.*
// from (your_query) a
// where rownum <= :M )
// where rnum >= :N;
long max = (limit == Integer.MAX_VALUE ? Long.MAX_VALUE : limit + offset);
sql.insert(0, "SELECT * FROM (SELECT A.*, ROWNUM RNUM FROM ( ");
sql.append(") A WHERE ROWNUM <= " + max + ")");
sql.append("WHERE RNUM > " + offset);
}
}
@Override
public void encodeTableAlias(String raw, StringBuffer sql) {
sql.append(" ");
encodeTableName(raw, sql);
}
@Override
public void registerSqlTypeToSqlTypeNameOverrides(
Map<Integer, String> overrides) {
super.registerSqlTypeToSqlTypeNameOverrides(overrides);
overrides.put(Types.REAL, "DOUBLE PRECISION");
overrides.put(Types.DOUBLE, "DOUBLE PRECISION");
overrides.put(Types.FLOAT, "FLOAT");
}
@Override
public void postCreateAttribute(AttributeDescriptor att, String tableName,
String schemaName, Connection cx) throws SQLException {
super.postCreateAttribute(att, tableName, schemaName, cx);
if(att instanceof GeometryDescriptor) {
Integer srid = (Integer) att.getUserData().get(JDBCDataStore.JDBC_NATIVE_SRID);
boolean geodetic = isGeodeticSrid(srid, cx);
att.getUserData().put(GEODETIC, geodetic);
}
}
}