Class UpperCaseFilter

  extended by org.apache.lucene.util.AttributeSource
      extended by org.apache.lucene.analysis.TokenStream
          extended by org.apache.lucene.analysis.TokenFilter
              extended by org.apache.lucene.analysis.core.UpperCaseFilter
All Implemented Interfaces:

public final class UpperCaseFilter
extends TokenFilter

Normalizes token text to UPPER CASE.

You must specify the required Version compatibility when creating UpperCaseFilter

NOTE: In Unicode, this transformation may lose information when the upper case character represents more than one lower case character. Use this filter when you require uppercase tokens. Use the LowerCaseFilter for general search matching

Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource
AttributeSource.AttributeFactory, AttributeSource.State
Field Summary
Fields inherited from class org.apache.lucene.analysis.TokenFilter
Constructor Summary
UpperCaseFilter(Version matchVersion, TokenStream in)
          Create a new UpperCaseFilter, that normalizes token text to upper case.
Method Summary
 boolean incrementToken()
Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end, reset
Methods inherited from class org.apache.lucene.util.AttributeSource
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail


public UpperCaseFilter(Version matchVersion,
                       TokenStream in)
Create a new UpperCaseFilter, that normalizes token text to upper case.

matchVersion - See above
in - TokenStream to filter
Method Detail


public final boolean incrementToken()
                             throws IOException
Specified by:
incrementToken in class TokenStream

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