Package org.geotools.data.duckdb

Class HexWKBEncoder

Object

HexWKBEncoder

public class HexWKBEncoder
extends Object

Utility class for encoding JTS geometries as hexadecimal WKB (Well-Known Binary) strings for use with DuckDB's spatial functions.

This encoder provides locale-independent geometry encoding that avoids issues with decimal separator parsing in different system locales. Instead of using WKT (Well-Known Text) which can be misinterpreted in locales that use comma as decimal separator, this class generates binary WKB data encoded as hexadecimal strings for use with DuckDB's ST_GeomFromHEXEWKB function.

Usage:

 Geometry geom = ...;
 StringBuffer sql = new StringBuffer("ST_GeomFromHEXEWKB('");
 HexWKBEncoder.encode(geom, sql);
 sql.append("')");
 

See Also:

• DuckDBDialect.encodeGeometryValue(Geometry, int, int, StringBuffer)
• DuckDBFilterToSQL.visitLiteralGeometry(org.geotools.api.filter.expression.Literal)

Constructor Summary

Constructors

Constructor	Description
HexWKBEncoder()

Method Summary

Modifier and Type	Method	Description
static void	encode(Geometry g, Appendable writer)	Encodes a JTS geometry as hexadecimal WKB and appends it to the provided writer.

Methods inherited from class Object

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

Constructor Details

HexWKBEncoder

public HexWKBEncoder()

Method Details

encode

public static void encode(Geometry g,
 Appendable writer)
                   throws IOException

Encodes a JTS geometry as hexadecimal WKB and appends it to the provided writer.

LinearRing geometries are automatically converted to LineString since DuckDB doesn't support the LinearRing type.

Parameters:

g - the geometry to encode

writer - the target to append the hexadecimal WKB representation to

Throws:

IOException - if there's an error writing to the appendable