It is not THAT hard to write a custom analyzer, that is what I did. I
found that there is a bug in the setup, however, in that there are two
incompatible definitions of Token. The generated file
<xx>Tokenizer.java refers to the wrong definition of Token so I ahve to
patch it before it will compile.
Other than that, doing a custom analyzer is pretty simple.
On Oct 16, 2006, at 5:32 PM, Otis Gospodnetic wrote:
Hi Ryan,
StandardAnalyzer should already be smart about keeping email addresses
as a single token:
// email addresses
| <EMAIL: <ALPHANUM> (("."|"-"|"_") <ALPHANUM>)* "@" <ALPHANUM>
(("."|"-") <ALPHANUM>)+ >
(this is from StandardAnalyzer.jj)
As for changing the text you feed to Lucene, that's all up to you.
Changing the String seems like the simplest approach. If you want to
wrap that in StringReader, you can, but you can also just work with
Strings.
Otis
----- Original Message ----
From: Ryan O'Hara <[EMAIL PROTECTED]>
To: java-user@lucene.apache.org
Sent: Monday, October 16, 2006 4:28:35 PM
Subject: Help with Custom Analyzer
I have a few questions regarding writing a custom analyzer.
My situation is that I would like to use the StandardAnalyzer but
with some data-specific rules. I was wondering if there was a way of
telling the StandardAnalyzer to treat a string of text, that would
normally be tokenized into more than one token, as only one token
(maybe by inserting quotes around the text). For example, say the
StandardAnalyzer normally splits the string of text
[EMAIL PROTECTED] into 4 tokens, but I want it to split the
string into only 1 token. Could I accomplish this by surrounding the
string with quotes or by using some other type of flag?
Another question I have is how do I modify the text being analyzed?
From how I interpreted what I have read (which could easily be off),
it looks like in order to accomplish what I have previously
described, I am going to have to add some code to my custom
analyzer's tokenStream method. I see that tokenStream() has a Field
and a Reader as parameters. Would the way I go about adding rules be
to edit the reader text? If so, would manipulation of the text be
easier if I were to convert the reader into a string?
Any help is greatly appreciated. Thanks.
-Ryan
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
