QString QgsShapeFile::getFeatureClass()
{
// scan the whole layer to try to determine the geometry
// type.
qApp->processEvents();
isMulti = scanGeometries();
OGRFeatureH feat;
// skip features without geometry
while (( feat = OGR_L_GetNextFeature( ogrLayer ) ) != NULL )
{
if ( OGR_F_GetGeometryRef( feat ) )
break;
}
if ( feat )
{
OGRGeometryH geom = OGR_F_GetGeometryRef( feat );
if ( geom )
{
/* OGR doesn't appear to report geometry type properly
* for a layer containing both polygon and multipolygon
* entities
*
// get the feature type from the layer
OGRFeatureDefn * gDef = ogrLayer->GetLayerDefn();
OGRwkbGeometryType gType = gDef->GetGeomType();
geom_type = QGis::qgisFeatureTypes[gType];
*/
//geom_type = QString(geom->getGeometryName());
//geom_type = "GEOMETRY";
QgsDebugMsg( "Preparing to escape " + geom_type );
char * esc_str = new char[geom_type.length()*2+1];
PQescapeString( esc_str, geom_type.toUtf8(), geom_type.length() );
geom_type = QString( esc_str );
QgsDebugMsg( "After escaping, geom_type is : " + geom_type );
delete[] esc_str;
QString file( fileName );
file.replace( file.length() - 3, 3, "dbf" );
// open the dbf file
std::ifstream dbf( file.toUtf8(), std::ios::in | std::ios::binary );
// read header
DbaseHeader dbh;
dbf.read(( char * )&dbh, sizeof( dbh ) );
// Check byte order
if ( htonl( 1 ) == 1 )
{
/* DbaseHeader is stored in little-endian format.
* The num_recs, size_hdr and size_rec fields must be byte-swapped when read
* on a big-endian processor. Currently only size_hdr is used.
*/
unsigned char *byte = reinterpret_cast<unsigned char *>( &dbh.size_hdr );
unsigned char t = *byte; *byte = *( byte + 1 ); *( byte + 1 ) = t;
}
Fda fda;
QString str_type = "varchar(";
for ( int field_count = 0, bytes_read = sizeof( dbh ); bytes_read < dbh.size_hdr - 1; field_count++, bytes_read += sizeof( fda ) )
{
dbf.read(( char * )&fda, sizeof( fda ) );
switch ( fda.field_type )
{
case 'N':
if (( int )fda.field_decimal > 0 )
column_types.push_back( "float" );
else
column_types.push_back( "int" );
break;
case 'F': column_types.push_back( "float" );
break;
case 'D': column_types.push_back( "date" );
break;
case 'C':
str_type = QString( "varchar(%1)" ).arg( fda.field_length );
column_types.push_back( str_type );
break;
case 'L': column_types.push_back( "boolean" );
break;
default:
column_types.push_back( "varchar(256)" );
break;
}
}
dbf.close();
int numFields = OGR_F_GetFieldCount( feat );
for ( int n = 0; n < numFields; n++ )
{
QString s = codec->toUnicode( OGR_Fld_GetNameRef( OGR_F_GetFieldDefnRef( feat, n ) ) );
column_names.push_back( s );
}
}
else valid = false;
OGR_F_Destroy( feat );
}
else valid = false;
OGR_L_ResetReading( ogrLayer );
return valid ? geom_type : QString::null;
}
QString QgsShapeFile::getFeatureClass()
{
// scan the whole layer to try to determine the geometry
// type.
qApp->processEvents();
isMulti = scanGeometries();
OGRFeatureH feat;
// skip features without geometry
while (( feat = OGR_L_GetNextFeature( ogrLayer ) ) != NULL )
{
if ( OGR_F_GetGeometryRef( feat ) )
break;
}
if ( feat )
{
OGRGeometryH geom = OGR_F_GetGeometryRef( feat );
if ( geom )
{
/* OGR doesn't appear to report geometry type properly
* for a layer containing both polygon and multipolygon
* entities
*
// get the feature type from the layer
OGRFeatureDefn * gDef = ogrLayer->GetLayerDefn();
OGRwkbGeometryType gType = gDef->GetGeomType();
geom_type = QGis::qgisFeatureTypes[gType];
*/
//geom_type = QString(geom->getGeometryName());
//geom_type = "GEOMETRY";
QgsDebugMsg( "Preparing to escape " + geom_type );
char * esc_str = new char[geom_type.length()*2+1];
PQescapeString( esc_str, geom_type.toUtf8(), geom_type.length() );
geom_type = QString( esc_str );
QgsDebugMsg( "After escaping, geom_type is : " + geom_type );
delete[] esc_str;
int numFields = OGR_F_GetFieldCount( feat );
for ( int n = 0; n < numFields; n++ )
{
OGRFieldDefnH fld = OGR_F_GetFieldDefnRef( feat, n );
column_names.push_back( codec->toUnicode( OGR_Fld_GetNameRef( fld ) ) );
switch ( OGR_Fld_GetType( fld ) )
{
case OFTInteger:
column_types.push_back( "int" );
break;
case OFTReal:
column_types.push_back( "float" );
break;
case OFTString:
column_types.push_back( QString( "varchar(%1)" ).arg( OGR_Fld_GetWidth( fld ) ) );
break;
case OFTDate:
column_types.push_back( "date" );
break;
case OFTTime:
column_types.push_back( "time" );
break;
case OFTDateTime:
column_types.push_back( "timestamp" );
break;
default:
column_types.push_back( "varchar(256)" );
break;
}
}
}
else valid = false;
OGR_F_Destroy( feat );
}
else valid = false;
OGR_L_ResetReading( ogrLayer );
return valid ? geom_type : QString::null;
}
