org.apache.lucene.analysis.core
Class LowerCaseFilter
java.lang.Object
org.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.core.LowerCaseFilter
- All Implemented Interfaces:
- Closeable
public final class LowerCaseFilter
- extends TokenFilter
Normalizes token text to lower case.
You must specify the required Version
compatibility when creating LowerCaseFilter:
- As of 3.1, supplementary characters are properly lowercased.
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 |
LowerCaseFilter
public LowerCaseFilter(Version matchVersion,
TokenStream in)
- Create a new LowerCaseFilter, that normalizes token text to lower case.
- Parameters:
matchVersion
- See abovein
- TokenStream to filter
incrementToken
public final boolean incrementToken()
throws IOException
- Specified by:
incrementToken
in class TokenStream
- Throws:
IOException
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