org.geolatte.geom.codec

Class AbstractWkbDecoder

java.lang.Object

org.geolatte.geom.codec.AbstractWkbDecoder

All Implemented Interfaces:

WkbDecoder

Direct Known Subclasses:

MySqlWkbDecoder, PostgisWkbDecoder

abstract class AbstractWkbDecoder
extends java.lang.Object
implements WkbDecoder

Base class for WkbDecoders.

Constructor Summary

Constructors

Constructor and Description
AbstractWkbDecoder()

Method Summary

Modifier and Type	Method and Description
private void	alignByteOrder(ByteBuffer byteBuffer)
Geometry<?>	decode(ByteBuffer byteBuffer) Decodes a WKB encoded representation of a Geometry
<P extends Position> Geometry<P>	decode(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs) Decodes a WKB encoded representation of a Geometry, assuming the specified CoordinateReferenceSystem
private <P extends Position> Geometry<P>	decodeGeometry(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> GeometryCollection<P,Geometry<P>>	decodeGeometryCollection(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> LineString<P>	decodeLineString(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> MultiLineString<P>	decodeMultiLineString(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> MultiPoint<P>	decodeMultiPoint(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> MultiPolygon<P>	decodeMultiPolygon(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> Point<P>	decodePoint(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> Polygon<P>	decodePolygon(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
protected abstract boolean	hasSrid(int typeCode)
protected abstract void	prepare(ByteBuffer byteBuffer) Perform any preparatory steps on the bytebuffer before starting the decoding.
protected abstract <P extends Position> CoordinateReferenceSystem<P>	readCrs(ByteBuffer byteBuffer, int typeCode, CoordinateReferenceSystem<P> crs) Read and set the SRID (if it is present)
private <P extends Position> java.util.List<LinearRing<P>>	readPolygonRings(int numRings, ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> void	readPosition(ByteBuffer byteBuffer, double[] coordinates, CoordinateReferenceSystem<P> crs)
private <P extends Position> PositionSequence<P>	readPositions(int numPos, ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
private <P extends Position> LinearRing<P>	readRing(ByteBuffer byteBuffer, CoordinateReferenceSystem<P> crs)
protected int	readTypeCode(ByteBuffer byteBuffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractWkbDecoder

AbstractWkbDecoder()

Method Detail

decode

public <P extends Position> Geometry<P> decode(ByteBuffer byteBuffer,
                                               CoordinateReferenceSystem<P> crs)

Description copied from interface: WkbDecoder

Decodes a WKB encoded representation of a Geometry, assuming the specified CoordinateReferenceSystem

Specified by:

decode in interface WkbDecoder

Type Parameters:

P - the Position type for the (base)

Parameters:

byteBuffer - the WKB encoded binary representation

crs - the base coordinate reference system assumed for the wkt

Returns:

the represented Geometry

decode

public Geometry<?> decode(ByteBuffer byteBuffer)

Description copied from interface: WkbDecoder

Decodes a WKB encoded representation of a Geometry

Specified by:

decode in interface WkbDecoder

Parameters:

byteBuffer - the WKB encoded binary representation

Returns:

the represented Geometry

decodeGeometry

private <P extends Position> Geometry<P> decodeGeometry(ByteBuffer byteBuffer,
                                                        CoordinateReferenceSystem<P> crs)

decodeMultiLineString

private <P extends Position> MultiLineString<P> decodeMultiLineString(ByteBuffer byteBuffer,
                                                                      CoordinateReferenceSystem<P> crs)

decodeMultiPoint

private <P extends Position> MultiPoint<P> decodeMultiPoint(ByteBuffer byteBuffer,
                                                            CoordinateReferenceSystem<P> crs)

decodeMultiPolygon

private <P extends Position> MultiPolygon<P> decodeMultiPolygon(ByteBuffer byteBuffer,
                                                                CoordinateReferenceSystem<P> crs)

decodeGeometryCollection

private <P extends Position> GeometryCollection<P,Geometry<P>> decodeGeometryCollection(ByteBuffer byteBuffer,
                                                                                        CoordinateReferenceSystem<P> crs)

decodePolygon

private <P extends Position> Polygon<P> decodePolygon(ByteBuffer byteBuffer,
                                                      CoordinateReferenceSystem<P> crs)

decodeLineString

private <P extends Position> LineString<P> decodeLineString(ByteBuffer byteBuffer,
                                                            CoordinateReferenceSystem<P> crs)

decodePoint

private <P extends Position> Point<P> decodePoint(ByteBuffer byteBuffer,
                                                  CoordinateReferenceSystem<P> crs)

readPositions

private <P extends Position> PositionSequence<P> readPositions(int numPos,
                                                               ByteBuffer byteBuffer,
                                                               CoordinateReferenceSystem<P> crs)

readPosition

private <P extends Position> void readPosition(ByteBuffer byteBuffer,
                                               double[] coordinates,
                                               CoordinateReferenceSystem<P> crs)

readPolygonRings

private <P extends Position> java.util.List<LinearRing<P>> readPolygonRings(int numRings,
                                                                            ByteBuffer byteBuffer,
                                                                            CoordinateReferenceSystem<P> crs)

readRing

private <P extends Position> LinearRing<P> readRing(ByteBuffer byteBuffer,
                                                    CoordinateReferenceSystem<P> crs)

prepare

protected abstract void prepare(ByteBuffer byteBuffer)

Perform any preparatory steps on the bytebuffer before starting the decoding.

Parameters:

byteBuffer -

readCrs

protected abstract <P extends Position> CoordinateReferenceSystem<P> readCrs(ByteBuffer byteBuffer,
                                                                             int typeCode,
                                                                             CoordinateReferenceSystem<P> crs)

Read and set the SRID (if it is present)

Parameters:

byteBuffer -

typeCode -

crs -

hasSrid

protected abstract boolean hasSrid(int typeCode)

readTypeCode

protected int readTypeCode(ByteBuffer byteBuffer)

alignByteOrder

private void alignByteOrder(ByteBuffer byteBuffer)