org.apache.lucene.index

## Class FieldFilterLeafReader

- java.lang.Object
- - org.apache.lucene.index.IndexReader
  - - org.apache.lucene.index.LeafReader
    - - org.apache.lucene.index.FilterLeafReader
      - - org.apache.lucene.index.FieldFilterLeafReader

- All Implemented Interfaces:
    Closeable, AutoCloseable

      public final class FieldFilterLeafReader
      extends FilterLeafReader

  A `FilterLeafReader` that exposes only a subset of fields from the underlying wrapped reader.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.lucene.index.FilterLeafReader

      `FilterLeafReader.FilterFields, FilterLeafReader.FilterPostingsEnum, FilterLeafReader.FilterTerms, FilterLeafReader.FilterTermsEnum`

    - ### Nested classes/interfaces inherited from class org.apache.lucene.index.IndexReader

      `IndexReader.CacheHelper, IndexReader.CacheKey, IndexReader.ClosedListener`

  - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.index.FilterLeafReader

      `in`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FieldFilterLeafReader(LeafReader in, Set<String> fields, boolean negate)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `document(int docID, StoredFieldVisitor visitor)`
    `BinaryDocValues` | `getBinaryDocValues(String field)`
    `IndexReader.CacheHelper` | `getCoreCacheHelper()`
    `FieldInfos` | `getFieldInfos()`
    `NumericDocValues` | `getNormValues(String field)`
    `IndexReader.CacheHelper` | `getReaderCacheHelper()`
    `SortedDocValues` | `getSortedDocValues(String field)`
    `SortedNumericDocValues` | `getSortedNumericDocValues(String field)`
    `SortedSetDocValues` | `getSortedSetDocValues(String field)`
    `Fields` | `getTermVectors(int docID)`
    `Terms` | `terms(String field)`
    `String` | `toString()`

    - ### Methods inherited from class org.apache.lucene.index.FilterLeafReader

      `checkIntegrity, doClose, getDelegate, getLiveDocs, getMetaData, getNumericDocValues, getPointValues, maxDoc, numDocs, unwrap`

    - ### Methods inherited from class org.apache.lucene.index.LeafReader

      `docFreq, getContext, getDocCount, getSumDocFreq, getSumTotalTermFreq, postings, postings, totalTermFreq`

    - ### Methods inherited from class org.apache.lucene.index.IndexReader

      `close, decRef, document, document, ensureOpen, equals, getRefCount, getTermVector, hasDeletions, hashCode, incRef, leaves, numDeletedDocs, registerParentReader, tryIncRef`

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

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

- - ### Constructor Detail

    - #### FieldFilterLeafReader

          public FieldFilterLeafReader(LeafReader in,
                                       Set<String> fields,
                                       boolean negate)

  - ### Method Detail

    - #### getFieldInfos

          public FieldInfos getFieldInfos()

      Overrides:
        `getFieldInfos` in class `FilterLeafReader`

    - #### getTermVectors

          public Fields getTermVectors(int docID)
                                throws IOException

      Overrides:
        `getTermVectors` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### document

          public void document(int docID,
                               StoredFieldVisitor visitor)
                        throws IOException

      Overrides:
        `document` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### terms

          public Terms terms(String field)
                      throws IOException

      Overrides:
        `terms` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### getBinaryDocValues

          public BinaryDocValues getBinaryDocValues(String field)
                                             throws IOException

      Overrides:
        `getBinaryDocValues` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### getSortedDocValues

          public SortedDocValues getSortedDocValues(String field)
                                             throws IOException

      Overrides:
        `getSortedDocValues` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### getSortedNumericDocValues

          public SortedNumericDocValues getSortedNumericDocValues(String field)
                                                           throws IOException

      Overrides:
        `getSortedNumericDocValues` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### getSortedSetDocValues

          public SortedSetDocValues getSortedSetDocValues(String field)
                                                   throws IOException

      Overrides:
        `getSortedSetDocValues` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### getNormValues

          public NumericDocValues getNormValues(String field)
                                         throws IOException

      Overrides:
        `getNormValues` in class `FilterLeafReader`
      Throws:
        `IOException`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `FilterLeafReader`

    - #### getCoreCacheHelper

          public IndexReader.CacheHelper getCoreCacheHelper()

      Specified by:
        `getCoreCacheHelper` in class `LeafReader`

    - #### getReaderCacheHelper

          public IndexReader.CacheHelper getReaderCacheHelper()

      Specified by:
        `getReaderCacheHelper` in class `IndexReader`

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