org.dspace.search
Class DSTokenizer

java.lang.Object
  org.apache.lucene.util.AttributeSource
      org.apache.lucene.analysis.TokenStream
          org.apache.lucene.analysis.Tokenizer
              org.apache.lucene.analysis.CharTokenizer
                  org.dspace.search.DSTokenizer

All Implemented Interfaces:

Closeable

public final class DSTokenizer
extends org.apache.lucene.analysis.CharTokenizer

Customized Lucene Tokenizer, since the standard one rejects numbers from indexing/querying.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State

Field Summary

Fields inherited from class org.apache.lucene.analysis.Tokenizer

input

Constructor Summary

DSTokenizer(org.apache.lucene.util.Version version, Reader in)
Construct a new LowerCaseTokenizer.

Method Summary

protected boolean	isTokenChar(int c) Collects only characters which do not satisfy Character.isWhitespace(char).
protected int	normalize(int c) Collects only characters which satisfy Character.isLetter(char).

Methods inherited from class org.apache.lucene.analysis.CharTokenizer

end, incrementToken, isTokenChar, normalize, reset

Methods inherited from class org.apache.lucene.analysis.Tokenizer

close, correctOffset

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

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

DSTokenizer

public DSTokenizer(org.apache.lucene.util.Version version,
                   Reader in)

Construct a new LowerCaseTokenizer.

Parameters:

version - Lucene version number

Method Detail

normalize

protected int normalize(int c)

Collects only characters which satisfy Character.isLetter(char).

Overrides:

normalize in class org.apache.lucene.analysis.CharTokenizer

isTokenChar

protected boolean isTokenChar(int c)

Collects only characters which do not satisfy Character.isWhitespace(char).

Overrides:

isTokenChar in class org.apache.lucene.analysis.CharTokenizer