ScanContext (elasticsearch 1.7.1 API)

```
public class ScanContext
extends Object
```
The scan context allows to optimize readers we already processed during scanning. We do that by keeping track of the count per reader, and if we are done with it, we no longer process it by using a filter that returns null docIdSet for this reader.

Nested Classes
Modifier and Type	Class and Description
`static class`	`ScanContext.ScanFilter`

Constructors
Constructor and Description
`ScanContext()`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()`
`org.apache.lucene.search.TopDocs`	`execute(SearchContext context)`

public org.apache.lucene.search.TopDocs execute(SearchContext context)
                                         throws IOException

Class ScanContext