Module org.apache.lucene.core

Package org.apache.lucene.geo

Class SimpleGeoJSONPolygonParser

java.lang.Object

org.apache.lucene.geo.SimpleGeoJSONPolygonParser

class SimpleGeoJSONPolygonParser
extends Object

Does minimal parsing of a GeoJSON object, to extract either Polygon or MultiPolygon, either directly as the top-level type, or if the top-level type is Feature, as the geometry of that feature.

Field Summary

Fields

Modifier and Type	Field	Description
private List<Object>	coordinates
(package private) final String	input
private String	polyType
private int	upto

Constructor Summary

Constructors

Constructor	Description
SimpleGeoJSONPolygonParser(String input)

Method Summary

Modifier and Type	Method	Description
private static boolean	isJSONWhitespace(char ch)
private boolean	isValidGeometryPath(String path)	Returns true if the object path is a valid location to see a Multi/Polygon geometry
private ParseException	newParseException(String details)	When calling this, upto should be at the position of the incorrect character!
Polygon[]	parse()
private List<Object>	parseArray(String path)
private Number	parseNumber()
private void	parseObject(String path)	path is the "address" by keys of where we are, e.g.
private double[][]	parsePoints(List<Object> o)	Parses [[lat, lon], [lat, lon] ...] into 2d double array
private Polygon	parsePolygon(List<Object> coordinates)
private String	parseString()
private char	peek()
private void	readEnd()
private void	scan(char expected)	Scans across whitespace and consumes the expected character, or throws ParseException if the character is wrong
private void	scan(String expected)	Scans the expected string, or throws ParseException

Methods inherited from class java.lang.Object

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

Field Details

input

final String input

upto

private int upto

polyType

private String polyType

coordinates

private List<Object> coordinates

Constructor Details

SimpleGeoJSONPolygonParser

public SimpleGeoJSONPolygonParser(String input)

Method Details

parse

public Polygon[] parse()
                throws ParseException

Throws:

ParseException

parseObject

private void parseObject(String path)
                  throws ParseException

path is the "address" by keys of where we are, e.g. geometry.coordinates

Throws:

ParseException

isValidGeometryPath

private boolean isValidGeometryPath(String path)

Returns true if the object path is a valid location to see a Multi/Polygon geometry

parsePolygon

private Polygon parsePolygon(List<Object> coordinates)
                      throws ParseException

Throws:

ParseException

parsePoints

private double[][] parsePoints(List<Object> o)
                        throws ParseException

Parses [[lat, lon], [lat, lon] ...] into 2d double array

Throws:

ParseException

parseArray

private List<Object> parseArray(String path)
                         throws ParseException

Throws:

ParseException

parseNumber

private Number parseNumber()
                    throws ParseException

Throws:

ParseException

parseString

private String parseString()
                    throws ParseException

Throws:

ParseException

peek

private char peek()
           throws ParseException

Throws:

ParseException

scan

private void scan(char expected)
           throws ParseException

Scans across whitespace and consumes the expected character, or throws ParseException if the character is wrong

Throws:

ParseException

readEnd

private void readEnd()
              throws ParseException

Throws:

ParseException

scan

private void scan(String expected)
           throws ParseException

Scans the expected string, or throws ParseException

Throws:

ParseException

isJSONWhitespace

private static boolean isJSONWhitespace(char ch)

newParseException

private ParseException newParseException(String details)
                                  throws ParseException

When calling this, upto should be at the position of the incorrect character!

Throws:

ParseException