org.geolatte.geom.codec

Class PostgisWktDecoder

java.lang.Object

org.geolatte.geom.codec.AbstractWktDecoder<Geometry<?>>

org.geolatte.geom.codec.PostgisWktDecoder

All Implemented Interfaces:

WktDecoder

Direct Known Subclasses:

HANAWktDecoder

class PostgisWktDecoder
extends AbstractWktDecoder<Geometry<?>>
implements WktDecoder

A decoder for the Postgis WKT/EWKT representations as used in Postgis (at least 1.0 to 1.5+).

This class is not thread-safe

Field Summary

Fields

Modifier and Type	Field and Description
private CoordinateReferenceSystem<?>	crs
private static java.util.regex.Pattern	SRID_RE
private static PostgisWktVariant	WKT_GEOM_TOKENS
private java.lang.String	wktString

Fields inherited from class org.geolatte.geom.codec.AbstractWktDecoder

currentToken

Constructor Summary

Constructors

Modifier	Constructor and Description
	PostgisWktDecoder()
protected	PostgisWktDecoder(WktVariant wktVariant)

Method Summary

Modifier and Type	Method and Description
private java.lang.String	buildWrongSymbolAtPositionMsg()
Geometry<?>	decode(java.lang.String wkt) Decodes a WKT representation.
<P extends Position> Geometry<P>	decode(java.lang.String wkt, CoordinateReferenceSystem<P> crs) Decodes a WKT representation using the specified (base) CoordinateReferenceSystem.
private <P extends Position> Geometry<P>	decodeGeometry(CoordinateReferenceSystem<P> crs)
private <P extends Position> GeometryCollection<P,Geometry<P>>	decodeGeometryCollection(CoordinateReferenceSystem<P> crs)
private <P extends Position> LinearRing<P>	decodeLinearRingText(CoordinateReferenceSystem<P> crs)
private <P extends Position> LineString<P>	decodeLineStringText(CoordinateReferenceSystem<P> crs)
private <P extends Position> Geometry<P>	decodeMultiLineString(CoordinateReferenceSystem<P> crs)
private <P extends Position> Geometry<P>	decodeMultiPoint(CoordinateReferenceSystem<P> crs)
private <P extends Position> MultiPolygon<P>	decodeMultiPolygon(CoordinateReferenceSystem<P> crs)
private <P extends Position> WktPointSequenceToken<P>	decodePointSequence(CoordinateReferenceSystem<P> forceCrs)
private <P extends Position> Point<P>	decodePointText(CoordinateReferenceSystem<P> crs)
private <P extends Position> Polygon<P>	decodePolygonText(CoordinateReferenceSystem<P> crs)
private void	initializeTokenizer(boolean forceToCRS)
private boolean	matchesEmptyToken()
private <P extends Position> void	prepare(java.lang.String wkt, CoordinateReferenceSystem<P> crs) The instance fields wktString and crsId are initialized prior to decoding.

Methods inherited from class org.geolatte.geom.codec.AbstractWktDecoder

decodeInt, decodeNumber, decodeText, getTokenizerPosition, getWktVariant, matchesCloseList, matchesElementSeparator, matchesOpenList, nextToken, setTokenizer

Methods inherited from class java.lang.Object

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

Field Detail

WKT_GEOM_TOKENS

private static final PostgisWktVariant WKT_GEOM_TOKENS

SRID_RE

private static final java.util.regex.Pattern SRID_RE

wktString

private java.lang.String wktString

crs

private CoordinateReferenceSystem<?> crs

Constructor Detail

PostgisWktDecoder

public PostgisWktDecoder()

PostgisWktDecoder

protected PostgisWktDecoder(WktVariant wktVariant)

Method Detail

decode

public Geometry<?> decode(java.lang.String wkt)

Description copied from interface: WktDecoder

Decodes a WKT representation.

Specified by:

decode in interface WktDecoder

Parameters:

wkt - the WKT string to decode

Returns:

the decoded Geometry

decode

public <P extends Position> Geometry<P> decode(java.lang.String wkt,
                                               CoordinateReferenceSystem<P> crs)

Description copied from interface: WktDecoder

Decodes a WKT representation using the specified (base) CoordinateReferenceSystem.

Specified by:

decode in interface WktDecoder

Type Parameters:

P - the Position type for the (base)

Parameters:

wkt - the WKT string to decode

crs - the base coordinate reference system assumed for the wkt

Returns:

the decoded Geometry

prepare

private <P extends Position> void prepare(java.lang.String wkt,
                                          CoordinateReferenceSystem<P> crs)

The instance fields wktString and crsId are initialized prior to decoding. For postgis EWKT that entails extracting the SRID prefix (if any) from the WKT string.

Parameters:

wkt - the WKT representation

initializeTokenizer

private void initializeTokenizer(boolean forceToCRS)

decodeGeometry

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

decodeMultiPolygon

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

decodeMultiLineString

private <P extends Position> Geometry<P> decodeMultiLineString(CoordinateReferenceSystem<P> crs)

decodeMultiPoint

private <P extends Position> Geometry<P> decodeMultiPoint(CoordinateReferenceSystem<P> crs)

decodeGeometryCollection

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

decodePolygonText

private <P extends Position> Polygon<P> decodePolygonText(CoordinateReferenceSystem<P> crs)

decodeLinearRingText

private <P extends Position> LinearRing<P> decodeLinearRingText(CoordinateReferenceSystem<P> crs)

decodeLineStringText

private <P extends Position> LineString<P> decodeLineStringText(CoordinateReferenceSystem<P> crs)

decodePointText

private <P extends Position> Point<P> decodePointText(CoordinateReferenceSystem<P> crs)

matchesEmptyToken

private boolean matchesEmptyToken()

decodePointSequence

private <P extends Position> WktPointSequenceToken<P> decodePointSequence(CoordinateReferenceSystem<P> forceCrs)

buildWrongSymbolAtPositionMsg

private java.lang.String buildWrongSymbolAtPositionMsg()