public static void map_fields(OSGeo.OGR.Layer ogr_layer,
out System.Collections.Hashtable outFieldMap,
out ESRI.ArcGIS.Geodatabase.IFields outFields,
out ESRI.ArcGIS.Geodatabase.esriDatasetType outDatasetType,
out ESRI.ArcGIS.Geometry.esriGeometryType outGeometryType,
out int outShapeIndex,
out int outOIDFieldIndex,
out ISpatialReference outSpatialReference)
{
outSpatialReference = null;
outFields = null;
outDatasetType = ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTTable; // start assuming it is a table
outGeometryType = esriGeometryType.esriGeometryNull; //don't know what it is
outOIDFieldIndex = -1;
outShapeIndex = -1;
outFieldMap = new System.Collections.Hashtable();
System.Collections.ArrayList fieldArray = new System.Collections.ArrayList();
OSGeo.OGR.FeatureDefn featDef = ogr_layer.GetLayerDefn();
int fieldsInserted = 0;
// OIDs and Geometries can be pseudo fields in GDAL and are thus *may* not included in the OGR FieldDef
// To account for that add those first (if they exist) and keep a mapping of fields using
// fieldsInserted
//////////////////////////////
//
// handle oid field pseudo column
//
ESRI.ArcGIS.Geodatabase.IFieldEdit2 oidFieldEdit = new ESRI.ArcGIS.Geodatabase.FieldClass();
if (ogr_layer.GetFIDColumn().Length > 0)
{
oidFieldEdit.Name_2 = ogr_layer.GetFIDColumn();
oidFieldEdit.AliasName_2 = ogr_layer.GetFIDColumn();
}
else
{
oidFieldEdit.Name_2 = "FID";
oidFieldEdit.AliasName_2 = "FID";
}
oidFieldEdit.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeOID;
fieldArray.Add(oidFieldEdit);
outOIDFieldIndex = fieldsInserted;
fieldsInserted++;
//////////////////////////////////////
//
// handle (optional) geometry field pseudo column
//
if (!(ogr_layer.GetGeomType() == OSGeo.OGR.wkbGeometryType.wkbNone ||
ogr_layer.GetGeomType() == OSGeo.OGR.wkbGeometryType.wkbUnknown))
{
ESRI.ArcGIS.Geodatabase.IFieldEdit2 geomFieldEdit = new ESRI.ArcGIS.Geodatabase.FieldClass();
if (ogr_layer.GetGeometryColumn().Length > 0)
{
geomFieldEdit.Name_2 = ogr_layer.GetGeometryColumn();
geomFieldEdit.AliasName_2 = ogr_layer.GetGeometryColumn();
}
else
{
geomFieldEdit.Name_2 = "Shape";
geomFieldEdit.AliasName_2 = "Shape";
}
geomFieldEdit.Type_2 = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeGeometry;
// add geometry def
ESRI.ArcGIS.Geometry.esriGeometryType gdbType;
bool hasZ;
ogr_geo_type_to_esri_geo_type(ogr_layer.GetGeomType(), out gdbType, out hasZ);
ESRI.ArcGIS.Geodatabase.IGeometryDefEdit geomDef = new ESRI.ArcGIS.Geodatabase.GeometryDefClass();
geomDef.GeometryType_2 = gdbType;
geomDef.HasM_2 = false; //no M support on OGR
geomDef.HasZ_2 = hasZ;
geomDef.SpatialReference_2 = outSpatialReference = ogr_utils.get_spatialReference(ogr_layer.GetSpatialRef());
geomFieldEdit.GeometryDef_2 = geomDef;
fieldArray.Add(geomFieldEdit);
outDatasetType = ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTFeatureClass; // upgrade to featureclass
outGeometryType = gdbType;
outShapeIndex = fieldsInserted;
fieldsInserted++;
}
int fieldCount = featDef.GetFieldCount();
for (int i = 0; i < fieldCount; i++)
{
// map OGR field to ArcObjects
OSGeo.OGR.FieldDefn fieldDef = featDef.GetFieldDefn(i);
ESRI.ArcGIS.Geodatabase.IFieldEdit2 fieldEdit = new ESRI.ArcGIS.Geodatabase.FieldClass();
fieldEdit.Name_2 = fieldDef.GetName();
fieldEdit.AliasName_2 = fieldDef.GetName();
// map type
OSGeo.OGR.FieldType ogrFieldType = fieldDef.GetFieldType();
ESRI.ArcGIS.Geodatabase.esriFieldType mappedType;
switch (ogrFieldType)
{
case OSGeo.OGR.FieldType.OFTInteger:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeInteger;
break;
case OSGeo.OGR.FieldType.OFTReal:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeDouble;
break;
case OSGeo.OGR.FieldType.OFTString:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeString;
break;
case OSGeo.OGR.FieldType.OFTBinary:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeBlob;
break;
case OSGeo.OGR.FieldType.OFTDateTime:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeDate;
break;
default:
mappedType = ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeString;
break;
}
fieldEdit.Type_2 = mappedType;
outFieldMap.Add(fieldsInserted, i);
fieldArray.Add(fieldEdit);
fieldsInserted++;
}
// Add all the fields from the array to an ESRI fields class object. The reason that we do that
// here is that we need to know the count in advance
ESRI.ArcGIS.Geodatabase.IFieldsEdit fields = new ESRI.ArcGIS.Geodatabase.FieldsClass();
fields.FieldCount_2 = fieldArray.Count;
for (int i = 0; i < fieldArray.Count; i++)
{
fields.set_Field(i, fieldArray[i] as ESRI.ArcGIS.Geodatabase.IField);
}
outFields = fields;
}
