Package org.apache.lucene.sandbox.search

# Class CoveringQuery

java.lang.Object
org.apache.lucene.search.Query
org.apache.lucene.sandbox.search.CoveringQuery

All Implemented Interfaces:
  `Accountable`

public final class CoveringQuery extends Query implements Accountable
A `Query` that allows to have a configurable number or required matches per document. This is typically useful in order to build queries whose query terms must all appear in documents.

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

- ## Field Summary

  ### Fields inherited from interface org.apache.lucene.util.Accountable

  `NULL_ACCOUNTABLE`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CoveringQuery(Collection<Query> queries, LongValuesSource minimumNumberMatch)`
  Sole constructor.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `Weight`
  `createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)`
  `boolean`
  `equals(Object obj)`
  `int`
  `hashCode()`
  `long`
  `ramBytesUsed()`
  `Query`
  `rewrite(IndexSearcher indexSearcher)`
  `String`
  `toString(String field)`
  `void`
  `visit(QueryVisitor visitor)`

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

  `classHash, sameClassAs, toString`

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

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

  ### Methods inherited from interface org.apache.lucene.util.Accountable

  `getChildResources`

- ## Constructor Details

  - ### CoveringQuery

    public CoveringQuery(Collection<Query> queries, LongValuesSource minimumNumberMatch)
    Sole constructor.
    Parameters:
      `queries` - Sub queries to match.
      `minimumNumberMatch` - Per-document long value that records how many queries should match. Values that are less than 1 are treated like `1`: only documents that have at least one matching clause will be considered matches. Documents that do not have a value for `minimumNumberMatch` do not match.

- ## Method Details

  - ### toString

    public String toString(String field)
    Specified by:
      `toString` in class `Query`

  - ### equals

    public boolean equals(Object obj)
    Specified by:
      `equals` in class `Query`

  - ### hashCode

    public int hashCode()
    Specified by:
      `hashCode` in class `Query`

  - ### ramBytesUsed

    public long ramBytesUsed()
    Specified by:
      `ramBytesUsed` in interface `Accountable`

  - ### rewrite

    public Query rewrite(IndexSearcher indexSearcher) throws IOException
    Overrides:
      `rewrite` in class `Query`
    Throws:
      `IOException`

  - ### visit

    public void visit(QueryVisitor visitor)
    Specified by:
      `visit` in class `Query`

  - ### createWeight

    public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException
    Overrides:
      `createWeight` in class `Query`
    Throws:
      `IOException`