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## org.apache.lucene.analysis
Class TokenFilter

    java.lang.Object
      org.apache.lucene.analysis.TokenStream
          org.apache.lucene.analysis.TokenFilter

Direct Known Subclasses:
  GermanStemFilter, LowerCaseFilter, PorterStemFilter, RussianLowerCaseFilter, RussianStemFilter, StandardFilter, StopFilter

public abstract class TokenFilter
extends TokenStream

A TokenFilter is a TokenStream whose input is another token stream.

This is an abstract class.

Field Summary
`protected TokenStream` | `input` The source of tokens for this filter.

Constructor Summary
`protected` | `TokenFilter()` Deprecated.
`protected` | `TokenFilter(TokenStream input)` Construct a token stream filtering the given input.

Method Summary
`void` | `close()` Close the input TokenStream.

Methods inherited from class org.apache.lucene.analysis.TokenStream
`next`

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

Field Detail

### input

    protected TokenStream input

  The source of tokens for this filter.

Constructor Detail

### TokenFilter

    protected TokenFilter()

  Deprecated.

  Call TokenFilter(TokenStream) instead.

### TokenFilter

    protected TokenFilter(TokenStream input)

  Construct a token stream filtering the given input.

Method Detail

### close

    public void close()
               throws IOException

  Close the input TokenStream.

  Overrides:
    `close` in class `TokenStream`
  Throws:
    `IOException`

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