Package org.apache.lucene.spatial.prefix

# Class WithinPrefixTreeQuery

java.lang.Object
org.apache.lucene.search.Query
org.apache.lucene.spatial.prefix.AbstractPrefixTreeQuery
org.apache.lucene.spatial.prefix.AbstractVisitingPrefixTreeQuery
org.apache.lucene.spatial.prefix.WithinPrefixTreeQuery

public class WithinPrefixTreeQuery extends AbstractVisitingPrefixTreeQuery
Finds docs where its indexed shape is `WITHIN` the query shape. It works by looking at cells outside of the query shape to ensure documents there are excluded. By default, it will examine all cells, and it's fairly slow. If you know that the indexed shapes are never comprised of multiple disjoint parts (which also means it is not multi-valued), then you can pass `SpatialPrefixTree.getDistanceForLevel(maxLevels)` as the `queryBuffer` constructor parameter to minimally look this distance beyond the query shape's edge. Even if the indexed shapes are sometimes comprised of multiple disjoint parts, you might want to use this option with a large buffer as a faster approximation with minimal false-positives.

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.spatial.prefix.AbstractVisitingPrefixTreeQuery

`AbstractVisitingPrefixTreeQuery.VisitorTemplate, AbstractVisitingPrefixTreeQuery.VNode`

## Nested classes/interfaces inherited from class org.apache.lucene.spatial.prefix.AbstractPrefixTreeQuery

`AbstractPrefixTreeQuery.BaseTermsEnumTraverser`

## Field Summary

### Fields inherited from class org.apache.lucene.spatial.prefix.AbstractVisitingPrefixTreeQuery

`prefixGridScanLevel`

### Fields inherited from class org.apache.lucene.spatial.prefix.AbstractPrefixTreeQuery

`detailLevel, fieldName, grid, queryShape`

## Constructor Summary

Constructors
Constructor
Description
`WithinPrefixTreeQuery(org.locationtech.spatial4j.shape.Shape queryShape, String fieldName, SpatialPrefixTree grid, int detailLevel, int prefixGridScanLevel, double queryBuffer)`
See `AbstractVisitingPrefixTreeQuery(org.locationtech.spatial4j.shape.Shape, String, org.apache.lucene.spatial.prefix.tree.SpatialPrefixTree, int, int)`.

## Method Summary

Modifier and Type
Method
Description
`protected org.locationtech.spatial4j.shape.Shape`
`bufferShape(org.locationtech.spatial4j.shape.Shape shape, double distErr)`
Returns a new shape that is larger than shape by at distErr.
`boolean`
`equals(Object o)`
`protected DocIdSet`
`getDocIdSet(LeafReaderContext context)`
`int`
`hashCode()`
`String`
`toString(String field)`

### Methods inherited from class org.apache.lucene.spatial.prefix.AbstractPrefixTreeQuery

`createWeight, visit`

### Methods inherited from class org.apache.lucene.search.Query

`classHash, rewrite, sameClassAs, toString`

### Methods inherited from class java.lang.Object

`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

## Constructor Details

### WithinPrefixTreeQuery

public WithinPrefixTreeQuery(org.locationtech.spatial4j.shape.Shape queryShape, String fieldName, SpatialPrefixTree grid, int detailLevel, int prefixGridScanLevel, double queryBuffer)
See `AbstractVisitingPrefixTreeQuery(org.locationtech.spatial4j.shape.Shape, String, org.apache.lucene.spatial.prefix.tree.SpatialPrefixTree, int, int)`. `queryBuffer` is the (minimum) distance beyond the query shape edge where non-matching documents are looked for so they can be excluded. If -1 is used then the whole world is examined (a good default for correctness).

## Method Details

### equals

public boolean equals(Object o)

Overrides:
  `equals` in class `AbstractPrefixTreeQuery`

### hashCode

public int hashCode()

Overrides:
  `hashCode` in class `AbstractPrefixTreeQuery`

### toString

public String toString(String field)

Specified by:
  `toString` in class `Query`

### bufferShape

protected org.locationtech.spatial4j.shape.Shape bufferShape(org.locationtech.spatial4j.shape.Shape shape, double distErr)
Returns a new shape that is larger than shape by at distErr.

### getDocIdSet

protected DocIdSet getDocIdSet(LeafReaderContext context) throws IOException

Specified by:
  `getDocIdSet` in class `AbstractPrefixTreeQuery`
Throws:
  `IOException`