Package ch.so.agi.filegdb.geometry

Class GeometryCodec

java.lang.Object

ch.so.agi.filegdb.geometry.GeometryCodec

public final class GeometryCodec
extends Object

Decodes Esri shape buffers as stored in file geodatabase geometry fields.

Ported from GDAL OpenFileGDB (filegdbtable.cpp, FileGDBOGRGeometryConverterImpl::GetAsGeometry). The shape type constants match ogrpgeogeometry.h, which is the header the GDAL driver compiles against. This codec intentionally has no JTS or Hop dependency.

Curved segments are decoded without linearization. The fgdb table geometry type of a shape buffer is encoded in the upper bits of the leading varint.

Method Summary

Modifier and Type	Method	Description
static FileGdbGeometry	decode(byte[] buffer, GeometryFieldDefinition definition)
static byte[]	encode(FileGdbGeometry geometry, GeometryFieldDefinition definition)	Encodes a geometry as an Esri shape buffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

decode

public static FileGdbGeometry decode(byte[] buffer,
 GeometryFieldDefinition definition)

encode

public static byte[] encode(FileGdbGeometry geometry,
 GeometryFieldDefinition definition)

Encodes a geometry as an Esri shape buffer.

The Z and M flags of the geometry field definition decide the shape type and the presence of the Z and M arrays, mirroring GDAL's EncodeGeometry().