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.util.CharTokenizer

org.dspace.search.DSTokenizer

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Deprecated.

Since DSpace 4 the system use an abstraction layer named Discovery to provide access to different search provider. The legacy system build upon Apache Lucene is likely to be removed in a future version. If you are interested in use Lucene as backend for the DSpace search system please consider to build a Lucene implementation of the Discovery interfaces

@Deprecated
public final class DSTokenizer
extends org.apache.lucene.analysis.util.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

Constructors

Constructor and Description
DSTokenizer(org.apache.lucene.util.Version version, java.io.Reader in) Deprecated. Construct a new LowerCaseTokenizer.

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	isTokenChar(int c) Deprecated. Collects only characters which do not satisfy Character.isWhitespace(char).
protected int	normalize(int c) Deprecated. Collects only characters which satisfy Character.isLetter(char).

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

end, incrementToken, reset

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

close, correctOffset, setReader

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

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DSTokenizer

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

Deprecated.

Construct a new LowerCaseTokenizer.

Parameters:

version - Lucene version number

Method Detail

normalize

protected int normalize(int c)

Deprecated.

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

Overrides:

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

isTokenChar

protected boolean isTokenChar(int c)

Deprecated.

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

Specified by:

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