/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2003-2008, 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.sdo;
import java.sql.SQLException;
import java.util.Iterator;
import oracle.jdbc.OracleConnection;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import oracle.sql.CHAR;
import oracle.sql.CharacterSet;
import oracle.sql.Datum;
import oracle.sql.NUMBER;
import oracle.sql.STRUCT;
import oracle.sql.StructDescriptor;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateList;
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.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;
/**
* Sample use of SDO class for simple JTS Geometry.
* <p>
* If needed I can make a LRSGeometryConverter that allows
* JTS Geometries with additional ordinates beyond xyz.
* </p>
* @author jgarnett
*
*
* @source $URL$
*/
public class GeometryConverter {
protected OracleConnection connection;
GeometryFactory geometryFactory;
public GeometryConverter( OracleConnection connection ){
this( connection, new GeometryFactory() );
}
public GeometryConverter( OracleConnection connection, GeometryFactory geometryFactory ){
this.geometryFactory = geometryFactory;
this.connection = connection;
}
public static final String DATATYPE = "MDSYS.SDO_GEOMETRY";
/**
* Used to handle MDSYS.SDO_GEOMETRY.
*
* @return <code>MDSYS.SDO_GEOMETRY</code>
*
* @see net.refractions.jspatial.Converter#getDataType()
*/
public String getDataTypeName() {
return DATATYPE;
}
/**
* Ensure that obj is a JTS Geometry (2D or 3D) with no LRS measures.
* <p>
* This Converter does not support SpatialCoordinates</p>
*
* @param geom the Geometry to be converted
* @return <code>true</code> if <code>obj</code> is a JTS Geometry
* @see net.refractions.jspatial.Converter#isCapable(java.lang.Object)
*/
public boolean isCapable(Geometry geom) {
if( geom == null ) return true;
if( geom instanceof Point || geom instanceof MultiPoint ||
geom instanceof LineString || geom instanceof MultiLineString ||
geom instanceof Polygon || geom instanceof MultiPolygon ||
geom instanceof GeometryCollection )
{
int d = SDO.D( geom );
int l = SDO.L( geom );
return l == 0 && ( d == 2 || d == 3);
}
return false;
}
/**
* Convert provided SDO_GEOMETRY to JTS Geometry.
* <p>
* Will return <code>null</code> as <code>null</code>.
* </p>
*
* @param sdoGeometry datum STRUCT to be converted to a double[]
*
* @return JTS <code>Geometry</code> representing the provided <code>datum</code>
* @throws SQLException
*
* @see net.refractions.jspatial.Converter#toObject(oracle.sql.STRUCT)
*/
public Geometry asGeometry(STRUCT sdoGeometry) throws SQLException {
// Note Returning null for null Datum
if( sdoGeometry == null ) return null;
Datum data[] = sdoGeometry.getOracleAttributes();
final int GTYPE = asInteger( data[0], 0 );
final int SRID = asInteger( data[1], SDO.SRID_NULL );
final double POINT[] = asDoubleArray( (STRUCT) data[2], Double.NaN );
final int ELEMINFO[] = asIntArray( (ARRAY) data[3], 0 );
final double ORDINATES[] = asDoubleArray( (ARRAY) data[4], Double.NaN );;
return SDO.create( geometryFactory,
GTYPE,
SRID,
POINT,
ELEMINFO,
ORDINATES );
}
/**
* Used to convert double[] to SDO_ODINATE_ARRAY.
* <p>
* Will return <code>null</code> as an empty <code>SDO_GEOMETRY</code></p>
*
* @param geom Map to be represented as a STRUCT
* @return STRUCT representing provided Map
* @see net.refractions.jspatial.Converter#toDataType(java.lang.Object)
*/
public STRUCT toSDO(Geometry geom) throws SQLException {
return toSDO(geom, geom.getSRID());
}
/**
* Used to convert double[] to SDO_ODINATE_ARRAY.
* <p>
* Will return <code>null</code> as an empty <code>SDO_GEOMETRY</code></p>
*
* @param geom Map to be represented as a STRUCT
* @return STRUCT representing provided Map
* @see net.refractions.jspatial.Converter#toDataType(java.lang.Object)
*/
public STRUCT toSDO(Geometry geom, int srid) throws SQLException {
if( geom == null) return asEmptyDataType();
int gtype = SDO.gType( geom );
NUMBER SDO_GTYPE = new NUMBER( gtype );
NUMBER SDO_SRID = (srid == SDO.SRID_NULL || srid == 0) ? null :
new NUMBER( srid );
double[] point = SDO.point( geom );
STRUCT SDO_POINT;
ARRAY SDO_ELEM_INFO;
ARRAY SDO_ORDINATES;
if( point == null ) {
final Envelope env = geom.getEnvelopeInternal();
if(env.getWidth() > 0 && env.getHeight() > 0 && !(geom instanceof GeometryCollection) && geom.isRectangle()) {
// rectangle optimization. Actually, more than an optimization. A few operators
// do not work properly if they don't get rectangular geoms encoded as rectangles
// SDO_FILTER is an example of this silly situation
SDO_POINT = null;
int elemInfo[] = new int[] {1, 1003, 3};
double ordinates[];
if(SDO.D(geom) == 2)
ordinates = new double[] {env.getMinX(), env.getMinY(), env.getMaxX(), env.getMaxY()};
else
ordinates = new double[] {env.getMinX(), env.getMinY(), 0, env.getMaxX(), env.getMaxY(), 0};
SDO_POINT = null;
SDO_ELEM_INFO = toARRAY( elemInfo, "MDSYS.SDO_ELEM_INFO_ARRAY" );
SDO_ORDINATES = toARRAY( ordinates, "MDSYS.SDO_ORDINATE_ARRAY" );
} else {
int elemInfo[] = SDO.elemInfo( geom );
double ordinates[] = SDO.ordinates( geom );
SDO_POINT = null;
SDO_ELEM_INFO = toARRAY( elemInfo, "MDSYS.SDO_ELEM_INFO_ARRAY" );
SDO_ORDINATES = toARRAY( ordinates, "MDSYS.SDO_ORDINATE_ARRAY" );
}
} else { // Point Optimization
Datum data[] = new Datum[]{
toNUMBER( point[0] ),
toNUMBER( point[1] ),
toNUMBER( point[2] ),
};
SDO_POINT = toSTRUCT( data, "MDSYS.SDO_POINT_TYPE" );
SDO_ELEM_INFO = null;
SDO_ORDINATES = null;
}
Datum attributes[] = new Datum[]{
SDO_GTYPE,
SDO_SRID,
SDO_POINT,
SDO_ELEM_INFO,
SDO_ORDINATES
};
return toSTRUCT( attributes, DATATYPE );
}
/**
* Representation of <code>null</code> as an Empty <code>SDO_GEOMETRY</code>.
*
* @return <code>null</code> as a SDO_GEOMETRY
*/
protected STRUCT asEmptyDataType() throws SQLException{
return toSTRUCT( null, DATATYPE );
}
/** Convience method for STRUCT construction. */
protected final STRUCT toSTRUCT( Datum attributes[], String dataType )
throws SQLException
{
if( dataType.startsWith("*.")){
dataType = "DRA."+dataType.substring(2);//TODO here
}
StructDescriptor descriptor =
StructDescriptor.createDescriptor( dataType, connection );
return new STRUCT( descriptor, connection, attributes );
}
/**
* Convience method for ARRAY construction.
* <p>
* Compare and contrast with toORDINATE - which treats <code>Double.NaN</code>
* as<code>NULL</code></p>
*/
protected final ARRAY toARRAY( double doubles[], String dataType )
throws SQLException
{
ArrayDescriptor descriptor =
ArrayDescriptor.createDescriptor( dataType, connection );
return new ARRAY( descriptor, connection, doubles );
}
/**
* Convience method for ARRAY construction.
* <p>
* Forced to burn memory here - only way to actually place
* <code>NULL</code> numbers in the ordinate stream.</p>
* <ul>
* <li>JTS: records lack of data as <code>Double.NaN</code></li>
* <li>SDO: records lack of data as <code>NULL</code></li>
* </ul>
* <p>
* The alternative is to construct the array from a array of
* doubles, which does not record <code>NULL</code> NUMBERs.</p>
* <p>
* The results is an "MDSYS.SDO_ORDINATE_ARRAY"</p>
* <code><pre>
* list = c1(1,2,0), c2(3,4,Double.NaN)
* measures = {{5,6},{7,8}
*
* toORDINATE( list, measures, 2 )
* = (1,2,5,7, 3,4,6,8)
*
* toORDINATE( list, measures, 3 )
* = (1,2,0,5,7, 3,4,NULL,6,8)
*
* toORDINATE( list, null, 2 )
* = (1,2, 3,4)
* </pre></code>
*
* @param list CoordinateList to be represented
* @param measures Per Coordiante Measures, <code>null</code> if not required
* @param D Dimension of Coordinates (limited to 2d, 3d)
*/
protected final ARRAY toORDINATE( CoordinateList list,
double measures[][],
final int D)
throws SQLException
{
ArrayDescriptor descriptor = ArrayDescriptor.createDescriptor(
"MDSYS.SDO_ORDINATE_ARRAY",
connection
);
final int LENGTH = measures != null ? measures.length : 0;
final int LEN = D + LENGTH;
Datum data[] = new Datum[ list.size()*LEN];
int offset = 0;
int index = 0;
Coordinate coord;
for( Iterator i=list.iterator(); i.hasNext(); index++)
{
coord = (Coordinate) i.next();
data[ offset++ ] = toNUMBER( coord.x );
data[ offset++ ] = toNUMBER( coord.y );
if( D == 3 )
{
data[ offset++ ] = toNUMBER( coord.x );
}
for( int j=0; j<LENGTH; j++)
{
data[ offset++ ] = toNUMBER( measures[ j][ index ] );
}
}
return new ARRAY( descriptor, connection, data );
}
protected final ARRAY toORDINATE( double ords[] )
throws SQLException
{
ArrayDescriptor descriptor = ArrayDescriptor.createDescriptor(
"MDSYS.SDO_ORDINATE_ARRAY",
connection
);
final int LENGTH = ords.length;
Datum data[] = new Datum[ LENGTH ];
for( int i=0; i<LENGTH; i++ )
{
data[ i ] = toNUMBER( ords[i] );
}
return new ARRAY( descriptor, connection, data );
}
protected final ARRAY toATTRIBUTE( double ords[], String desc )
throws SQLException
{
ArrayDescriptor descriptor = ArrayDescriptor.createDescriptor(
desc,
connection
);
final int LENGTH = ords.length;
Datum data[] = new Datum[ LENGTH ];
for( int i=0; i<LENGTH; i++ )
{
data[ i ] = toNUMBER( ords[i] );
}
return new ARRAY( descriptor, connection, data );
}
/**
* Convience method for NUMBER construction.
* <p>
* Double.NaN is represented as <code>NULL</code> to agree
* with JTS use.</p>
*/
protected final NUMBER toNUMBER( double number ) throws SQLException{
if( Double.isNaN( number )){
return null;
}
return new NUMBER( number );
}
/**
* Convience method for ARRAY construction.
*/
protected final ARRAY toARRAY( int ints[], String dataType )
throws SQLException
{
ArrayDescriptor descriptor =
ArrayDescriptor.createDescriptor( dataType, connection );
return new ARRAY( descriptor, connection, ints );
}
/** Convience method for NUMBER construction */
protected final NUMBER toNUMBER( int number )
{
return new NUMBER( number );
}
/** Convience method for CHAR construction */
protected final CHAR toCHAR( String s )
{
// make sure if the string is larger than one character, only take the first character
if (s.length() > 1)
s = new String((new Character(s.charAt(0))).toString());
try {
//BUG: make sure I am correct
return new CHAR(s, CharacterSet.make(CharacterSet.ISO_LATIN_1_CHARSET));
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
//
// These functions present Datum as a Java type
//
/** Presents datum as an int */
protected int asInteger( Datum datum, final int DEFAULT )
throws SQLException
{
if( datum == null) return DEFAULT;
return ((NUMBER) datum).intValue();
}
/** Presents datum as a double */
protected double asDouble( Datum datum, final double DEFAULT )
throws SQLException
{
if( datum == null) return DEFAULT;
return ((NUMBER) datum).doubleValue();
}
/** Presents struct as a double[] */
protected double[] asDoubleArray( STRUCT struct, final double DEFAULT )
throws SQLException
{
if( struct == null ) return null;
return asDoubleArray( struct.getOracleAttributes(), DEFAULT );
}
/** Presents array as a double[] */
protected double[] asDoubleArray( ARRAY array, final double DEFAULT )
throws SQLException
{
if( array == null ) return null;
if( DEFAULT == 0 ) return array.getDoubleArray();
return asDoubleArray( array.getOracleArray(), DEFAULT );
}
/** Presents Datum[] as a double[] */
protected double[] asDoubleArray( Datum data[], final double DEFAULT )
throws SQLException
{
if( data== null ) return null;
double array[] = new double[ data.length ];
for( int i=0; i<data.length; i++ )
{
array[ i ] = asDouble( data[ i ], DEFAULT );
}
return array;
}
protected int[] asIntArray( ARRAY array, int DEFAULT )
throws SQLException
{
if( array == null ) return null;
if( DEFAULT == 0 ) return array.getIntArray();
return asIntArray( array.getOracleArray(), DEFAULT );
}
/** Presents Datum[] as a int[] */
protected int[] asIntArray( Datum data[], final int DEFAULT )
throws SQLException
{
if( data== null ) return null;
int array[] = new int[ data.length ];
for( int i=0; i<data.length; i++ )
{
array[ i ] = asInteger( data[ i ], DEFAULT );
}
return array;
}
}