org.apache.lucene.document

Class GeoPointField

java.lang.Object

org.apache.lucene.document.Field

org.apache.lucene.document.GeoPointField

All Implemented Interfaces:

IndexableField

public final class GeoPointField
extends Field

Field that indexes latitude longitude decimal-degree values for efficient encoding, sorting, and querying. This Geo capability is intended to provide a basic and efficient out of the box field type for indexing and querying 2 dimensional points in WGS-84 decimal degrees. An example usage is as follows:

  document.add(new GeoPointField(name, -96.33, 32.66, Field.Store.NO));
 

To perform simple geospatial queries against a GeoPointField, see GeoPointInBBoxQuery, GeoPointInPolygonQuery, or GeoPointDistanceQuery NOTE: This indexes only high precision encoded terms which may result in visiting a high number of terms for large queries. See LUCENE-6481 for a future improvement.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.document.Field

Field.Index, Field.Store, Field.TermVector

Field Summary

Fields

Modifier and Type	Field and Description
static int	PRECISION_STEP
static FieldType	TYPE_NOT_STORED Type for an GeoPointField that is not stored: normalization factors, frequencies, and positions are omitted.
static FieldType	TYPE_STORED Type for a stored GeoPointField: normalization factors, frequencies, and positions are omitted.

Fields inherited from class org.apache.lucene.document.Field

boost, fieldsData, name, tokenStream, type

Constructor Summary

Constructors

Constructor and Description
GeoPointField(String name, double lon, double lat, Field.Store stored) Creates a stored or un-stored GeoPointField with the provided value and default precisionStep set to 64 to avoid wasteful indexing of lower precision terms.
GeoPointField(String name, double lon, double lat, FieldType type) Expert: allows you to customize the FieldType.

Method Summary

Methods

Modifier and Type	Method and Description
double	getLat()
double	getLon()
String	toString()

Methods inherited from class org.apache.lucene.document.Field

binaryValue, boost, fieldType, name, numericValue, readerValue, setBoost, setBytesValue, setBytesValue, setByteValue, setDoubleValue, setFloatValue, setIntValue, setLongValue, setReaderValue, setShortValue, setStringValue, setTokenStream, stringValue, tokenStream, tokenStreamValue, translateFieldType

Methods inherited from class java.lang.Object

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

Field Detail

PRECISION_STEP

public static final int PRECISION_STEP

See Also:

Constant Field Values

TYPE_NOT_STORED

public static final FieldType TYPE_NOT_STORED

Type for an GeoPointField that is not stored: normalization factors, frequencies, and positions are omitted.

TYPE_STORED

public static final FieldType TYPE_STORED

Type for a stored GeoPointField: normalization factors, frequencies, and positions are omitted.

Constructor Detail

GeoPointField

public GeoPointField(String name,
             double lon,
             double lat,
             Field.Store stored)

Creates a stored or un-stored GeoPointField with the provided value and default precisionStep set to 64 to avoid wasteful indexing of lower precision terms.

Parameters:

name - field name

lon - longitude double value [-180.0 : 180.0]

lat - latitude double value [-90.0 : 90.0]

stored - Store.YES if the content should also be stored

Throws:

IllegalArgumentException - if the field name is null.

GeoPointField

public GeoPointField(String name,
             double lon,
             double lat,
             FieldType type)

Expert: allows you to customize the FieldType.

Parameters:

name - field name

lon - longitude double value [-180.0 : 180.0]

lat - latitude double value [-90.0 : 90.0]

type - customized field type: must have FieldType.numericType() of FieldType.NumericType.LONG.

Throws:

IllegalArgumentException - if the field name or type is null, or if the field type does not have a LONG numericType()

Method Detail

getLon

public double getLon()

getLat

public double getLat()

toString

public String toString()

Overrides:

toString in class Field