/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.spatial.dialect.sqlserver;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.geolatte.geom.Geometry;
import org.geolatte.geom.codec.db.sqlserver.Decoders;
import org.geolatte.geom.codec.db.sqlserver.Encoders;
import org.hibernate.type.descriptor.ValueBinder;
import org.hibernate.type.descriptor.ValueExtractor;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
import org.hibernate.type.descriptor.sql.BasicBinder;
import org.hibernate.type.descriptor.sql.BasicExtractor;
import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
/**
* Type descriptor for the SQL Server 2008 Geometry type.
*
* @author Karel Maesen, Geovise BVBA
* creation-date: 8/23/11
*/
public class SqlServer2008GeometryTypeDescriptor implements SqlTypeDescriptor {
/**
* An instance of the descrtiptor
*/
public static final SqlServer2008GeometryTypeDescriptor INSTANCE = new SqlServer2008GeometryTypeDescriptor();
@Override
public int getSqlType() {
return Types.ARRAY;
}
@Override
public boolean canBeRemapped() {
return false;
}
@Override
public <X> ValueBinder<X> getBinder(final JavaTypeDescriptor<X> javaTypeDescriptor) {
return new BasicBinder<X>( javaTypeDescriptor, this ) {
@Override
protected void doBind(PreparedStatement st, X value, int index, WrapperOptions options)
throws SQLException {
final Geometry geometry = getJavaDescriptor().unwrap( value, Geometry.class, options );
final byte[] bytes = Encoders.encode( geometry );
st.setObject( index, bytes );
}
@Override
protected void doBind(CallableStatement st, X value, String name, WrapperOptions options)
throws SQLException {
final Geometry geometry = getJavaDescriptor().unwrap( value, Geometry.class, options );
final byte[] bytes = Encoders.encode( geometry );
st.setObject( name, bytes );
}
};
}
@Override
public <X> ValueExtractor<X> getExtractor(final JavaTypeDescriptor<X> javaTypeDescriptor) {
return new BasicExtractor<X>( javaTypeDescriptor, this ) {
@Override
protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
return getJavaDescriptor().wrap( toGeometry( rs.getObject( name ) ), options );
}
@Override
protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
return getJavaDescriptor().wrap( toGeometry( statement.getObject( index ) ), options );
}
@Override
protected X doExtract(CallableStatement statement, String name, WrapperOptions options)
throws SQLException {
return getJavaDescriptor().wrap( toGeometry( statement.getObject( name ) ), options );
}
};
}
private Geometry toGeometry(Object obj) {
byte[] raw = null;
if ( obj == null ) {
return null;
}
if ( (obj instanceof byte[]) ) {
raw = (byte[]) obj;
}
else if ( obj instanceof Blob ) {
raw = toByteArray( (Blob) obj );
}
else {
throw new IllegalArgumentException( "Expected byte array or BLOB" );
}
return Decoders.decode( raw );
}
private byte[] toByteArray(Blob blob) {
try {
return blob.getBytes( 1, (int) blob.length() );
}
catch (SQLException e) {
throw new RuntimeException( "Error on transforming blob into array.", e );
}
}
}