Stephane
Eric Isakson wrote:
That method works too. Putting your token filter in the org.apache.lucene.analysis package and replacing:
if ( !word.equals( token.termText() ) ) {
return new Token( word, token.startOffset(),
token.endOffset(), token.type() );
}
with
token.termText = word;
return token;
will make your code operate more efficiently as you won't be creating a bunch of new Token objects that will have to be garbage collected. Would be nice if the termText was "protected" rather than package scoped.
Eric
-----Original Message-----
From: stephane vaucher [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 12, 2002 12:12 PM
To: Lucene Users List
Subject: Re: Accentuated characters
There is no problem with package scopes:
This is how I remove trailing 's' chars:
String word = token.termText();
if(word.endsWith("s")){
word = word.substring(0, word.length() - 1);
}
if ( !word.equals( token.termText() ) ) {
return new Token( word, token.startOffset(),
token.endOffset(), token.type() );
}
I'll take a look at how the Collator works to see if I can make a generic (maybe locale specific) string normaliser so I could specify the level of differences.
Stephane
Eric Isakson wrote:
If you really want to make your own TokenFilter, have a look at org.apache.lucene.analysis.LowerCaseFilter.next()
it does:
public final Token next() throws java.io.IOException {
Token t = input.next();
if (t == null)
return null;
t.termText = t.termText.toLowerCase();
return t;
}
The termText member of the Token class is package scoped, so you will have to implement your filter in the org.apache.lucene.analysis package. No worries about encoding as the termText is already a java (unicode) string. You will just have to provide the mechanism to get the accented characters converted to there non-accented equivalents. java.text.Collator has some magic that does this for string comparisons but I couldn't find any public methods that give you access to convert a string to its non-accented equivalent.
Eric
--
Eric D. Isakson SAS Institute Inc.
Application Developer SAS Campus Drive
XML Technologies Cary, NC 27513
(919) 531-3639 http://www.sas.com
-----Original Message-----
From: stephane vaucher [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 10, 2002 2:58 PM
To: [EMAIL PROTECTED]
Subject: Accentuated characters
Hello everyone,
I wish to implement a TokenFilter that will remove accentuated characters so for example '�' will become 'e'. As I would rather not reinvent the wheel, I've tried to find something on the web and on the mailing lists. I saw a mention of a contrib that could do this (see http://www.mail-archive.com/lucene-user%40jakarta.apache.org/msg02146.html), but I don't see anything applicable.
Has anyone done this yet, if so I would much appreciate some pointers (or code), otherwise, I'll be happy to contribute whatever I produce (but it might be very simple since I'll only need to deal with french).
Cheers,
Stephane
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