org.postgis.jts

Class JtsBinaryParser

java.lang.Object

org.postgis.jts.JtsBinaryParser

public class JtsBinaryParser
extends Object

Parse binary representation of geometries. Currently, only text rep (hexed) implementation is tested. It should be easy to add char[] and CharSequence ByteGetter instances, although the latter one is not compatible with older jdks. I did not implement real unsigned 32-bit integers or emulate them with long, as both java Arrays and Strings currently can have only 2^31-1 elements (bytes), so we cannot even get or build Geometries with more than approx. 2^28 coordinates (8 bytes each).

Author:

Markus Schaber, markus.schaber@logix-tt.com

Constructor Summary

Constructors

Constructor and Description
JtsBinaryParser()

Method Summary

Modifier and Type	Method and Description
com.vividsolutions.jts.geom.Geometry	parse(byte[] value) Parse a binary encoded geometry.
com.vividsolutions.jts.geom.Geometry	parse(String value) Parse a hex encoded geometry
protected com.vividsolutions.jts.geom.Geometry	parseGeometry(ValueGetter data) Parse a geometry starting at offset.
protected com.vividsolutions.jts.geom.Geometry	parseGeometry(ValueGetter data, int srid, boolean inheritSrid) Parse with a known geometry factory
static ValueGetter	valueGetterForEndian(ByteGetter bytes) Get the appropriate ValueGetter for my endianness

Methods inherited from class java.lang.Object

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

Constructor Detail

JtsBinaryParser

public JtsBinaryParser()

Method Detail

valueGetterForEndian

public static ValueGetter valueGetterForEndian(ByteGetter bytes)

Get the appropriate ValueGetter for my endianness

Parameters:

bytes - The appropriate Byte Getter

Returns:

the ValueGetter

parse

public com.vividsolutions.jts.geom.Geometry parse(String value)

Parse a hex encoded geometry

Parameters:

value - String containing the hex data to be parsed

Returns:

the resulting parsed geometry

parse

public com.vividsolutions.jts.geom.Geometry parse(byte[] value)

Parse a binary encoded geometry.

Parameters:

value - byte array containing the binary encoded geometru

Returns:

the resulting parsed geometry

parseGeometry

protected com.vividsolutions.jts.geom.Geometry parseGeometry(ValueGetter data)

Parse a geometry starting at offset.

Parameters:

data - ValueGetter for the data to be parsed

Returns:

The resulting Geometry

parseGeometry

protected com.vividsolutions.jts.geom.Geometry parseGeometry(ValueGetter data,
                                                             int srid,
                                                             boolean inheritSrid)

Parse with a known geometry factory

Parameters:

data - ValueGetter for the data to be parsed

srid - the SRID to be used for parsing

inheritSrid - flag to toggle inheriting SRIDs

Returns:

The resulting Geometry