Package org.apache.lucene.search

# Class FilterCollector

java.lang.Object
org.apache.lucene.search.FilterCollector

All Implemented Interfaces:
  `Collector`

Direct Known Subclasses:
  `CachingCollector`, `PositiveScoresOnlyCollector`

public abstract class FilterCollector extends Object implements Collector
`Collector` delegator.

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

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected final Collector`
  `in`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `FilterCollector(Collector in)`
  Sole constructor.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `LeafCollector`
  `getLeafCollector(LeafReaderContext context)`
  Create a new `collector` to collect the given context.
  `ScoreMode`
  `scoreMode()`
  Indicates what features are required from the scorer.
  `void`
  `setWeight(Weight weight)`
  Set the `Weight` that will be used to produce scorers that will feed `LeafCollector`s.
  `String`
  `toString()`

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

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

- ## Field Details

  - ### in

    protected final Collector in

- ## Constructor Details

  - ### FilterCollector

    public FilterCollector(Collector in)
    Sole constructor.

- ## Method Details

  - ### getLeafCollector

    public LeafCollector getLeafCollector(LeafReaderContext context) throws IOException
    Description copied from interface: `Collector`
    Create a new `collector` to collect the given context.
    Specified by:
      `getLeafCollector` in interface `Collector`
    Parameters:
      `context` - next atomic reader context
    Throws:
      `IOException`

  - ### setWeight

    public void setWeight(Weight weight)
    Description copied from interface: `Collector`
    Set the `Weight` that will be used to produce scorers that will feed `LeafCollector`s. This is typically useful to have access to `Weight.count(org.apache.lucene.index.LeafReaderContext)` from `Collector.getLeafCollector(org.apache.lucene.index.LeafReaderContext)`.
    Specified by:
      `setWeight` in interface `Collector`

  - ### toString

    public String toString()
    Overrides:
      `toString` in class `Object`

  - ### scoreMode

    public ScoreMode scoreMode()
    Description copied from interface: `Collector`
    Indicates what features are required from the scorer.
    Specified by:
      `scoreMode` in interface `Collector`