CoveringQuery (Lucene 8.1.0 API)

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

```
public final class CoveringQuery
extends Query
```
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.

Constructor Summary

Constructors
Constructor Description

CoveringQuery(Collection<Query> queries, LongValuesSource minimumNumberMatch)
Sole constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Weight`	`createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)`
`boolean`	`equals(Object obj)`
`int`	`hashCode()`
`Query`	`rewrite(IndexReader reader)`
`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

- Constructor Detail
  - 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 Detail
  - 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
  - rewrite
```
public Query rewrite(IndexReader reader)
              throws IOException
```
    Overrides:
    
    rewrite in class Query
    
    Throws:
    
    IOException
  - visit
```
public void visit(QueryVisitor visitor)
```
    Overrides:
    
    visit in class Query
  - createWeight
```
public Weight createWeight(IndexSearcher searcher,
                           ScoreMode scoreMode,
                           float boost)
                    throws IOException
```
    Overrides:
    
    createWeight in class Query
    
    Throws:
    
    IOException