org.apache.lucene.spatial.prefix

Class TermQueryPrefixTreeStrategy

java.lang.Object

org.apache.lucene.spatial.SpatialStrategy

org.apache.lucene.spatial.prefix.PrefixTreeStrategy

org.apache.lucene.spatial.prefix.TermQueryPrefixTreeStrategy

public class TermQueryPrefixTreeStrategy
extends PrefixTreeStrategy

A basic implementation of PrefixTreeStrategy using a large TermsFilter of all the nodes from SpatialPrefixTree.getNodes(com.spatial4j.core.shape.Shape, int, boolean). It only supports the search of indexed Point shapes.

The precision of query shapes (distErrPct) is an important factor in using this Strategy. If the precision is too precise then it will result in many terms which will amount to a slower query.

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

Field Summary

Fields inherited from class org.apache.lucene.spatial.prefix.PrefixTreeStrategy

defaultFieldValuesArrayLen, distErrPct, FIELD_TYPE, grid

Fields inherited from class org.apache.lucene.spatial.SpatialStrategy

ctx

Constructor Summary

Constructors

Constructor and Description
TermQueryPrefixTreeStrategy(SpatialPrefixTree grid, String fieldName)

Method Summary

Methods

Modifier and Type	Method and Description
Filter	makeFilter(SpatialArgs args) Make a Filter based principally on SpatialOperation and Shape from the supplied args.

Methods inherited from class org.apache.lucene.spatial.prefix.PrefixTreeStrategy

createIndexableFields, createIndexableFields, getDistErrPct, getGrid, makeDistanceValueSource, setDefaultFieldValuesArrayLen, setDistErrPct

Methods inherited from class org.apache.lucene.spatial.SpatialStrategy

getFieldName, getSpatialContext, makeQuery, makeRecipDistanceValueSource, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

TermQueryPrefixTreeStrategy

public TermQueryPrefixTreeStrategy(SpatialPrefixTree grid,
                           String fieldName)

Method Detail

makeFilter

public Filter makeFilter(SpatialArgs args)

Description copied from class: SpatialStrategy

Make a Filter based principally on SpatialOperation and Shape from the supplied args.

If a subclasses implements SpatialStrategy.makeQuery(org.apache.lucene.spatial.query.SpatialArgs) then this method could be simply:

return new QueryWrapperFilter(makeQuery(args).getQuery());

Specified by:

makeFilter in class SpatialStrategy