Package io.debezium.spatial

Class GeometryTraverser

java.lang.Object

io.debezium.spatial.GeometryTraverser

class GeometryTraverser
extends Object

A traversal algorithm that uses the visitor pattern, GeometryVisitor, to perform operations over an input byte buffer that represents a WKB or EWKB byte array.

Author:

Chris Cranford

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	GeometryTraverser.ByteOrderScope	Helper class that changes the ByteOrder of a ByteBuffer if the new order differs, restoring the order after the scope closes automatically.

Constructor Summary

Constructors

Constructor	Description
GeometryTraverser()

Method Summary

Modifier and Type	Method	Description
static void	traverse(ByteBuffer buffer, GeometryVisitor visitor)	For a given byte buffer that contains a WKB/EWKB, applies the visitor to traverse the geometry.
private static void	traverseGeometryCollection(ByteBuffer buffer, GeometryVisitor visitor)
private static void	traverseLineString(ByteBuffer buffer, GeometryVisitor visitor, int stride)
private static void	traverseMultiLineString(ByteBuffer buffer, GeometryVisitor visitor, int stride)
private static void	traverseMultiPoint(ByteBuffer buffer, GeometryVisitor visitor, int stride)
private static void	traverseMultiPolygon(ByteBuffer buffer, GeometryVisitor visitor, int stride)
private static void	traversePoint(ByteBuffer buffer, GeometryVisitor visitor, int stride)
private static void	traversePolygon(ByteBuffer buffer, GeometryVisitor visitor, int stride)

Methods inherited from class java.lang.Object

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

Constructor Details

GeometryTraverser

GeometryTraverser()

Method Details

traverse

public static void traverse(ByteBuffer buffer,
 GeometryVisitor visitor)

For a given byte buffer that contains a WKB/EWKB, applies the visitor to traverse the geometry.

Parameters:

buffer - the geometry byte buffer, should not be null

visitor - the visit to apply, should not be null

traversePoint

private static void traversePoint(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traverseLineString

private static void traverseLineString(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traversePolygon

private static void traversePolygon(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traverseMultiPoint

private static void traverseMultiPoint(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traverseMultiLineString

private static void traverseMultiLineString(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traverseMultiPolygon

private static void traverseMultiPolygon(ByteBuffer buffer,
 GeometryVisitor visitor,
 int stride)

traverseGeometryCollection

private static void traverseGeometryCollection(ByteBuffer buffer,
 GeometryVisitor visitor)