CollectionStatistics (Lucene 7.7.0 API)

java.lang.Object
- org.apache.lucene.search.CollectionStatistics

```
public class CollectionStatistics
extends Object
```
Contains statistics for a collection (field)

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

Constructor Summary

Constructors
Constructor	Description
`CollectionStatistics(String field, long maxDoc, long docCount, long sumTotalTermFreq, long sumDocFreq)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`docCount()`	returns the total number of documents that have at least one term for this field.
`String`	`field()`	returns the field name
`long`	`maxDoc()`	returns the total number of documents, regardless of whether they all contain values for this field.
`long`	`sumDocFreq()`	returns the total number of postings for this field
`long`	`sumTotalTermFreq()`	returns the total number of tokens for this field

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CollectionStatistics
```
public CollectionStatistics(String field,
                            long maxDoc,
                            long docCount,
                            long sumTotalTermFreq,
                            long sumDocFreq)
```
- Method Detail
  - field
```
public final String field()
```
    returns the field name
  - maxDoc
```
public final long maxDoc()
```
    returns the total number of documents, regardless of whether they all contain values for this field.
    
    See Also:
    
    IndexReader.maxDoc()
  - docCount
```
public final long docCount()
```
    returns the total number of documents that have at least one term for this field.
    
    See Also:
    
    Terms.getDocCount()
  - sumTotalTermFreq
```
public final long sumTotalTermFreq()
```
    returns the total number of tokens for this field
    
    See Also:
    
    Terms.getSumTotalTermFreq()
  - sumDocFreq
```
public final long sumDocFreq()
```
    returns the total number of postings for this field
    
    See Also:
    
    Terms.getSumDocFreq()