Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: pass (athena.apache.org: domain of goksron@gmail.com designates
 209.85.210.177 as permitted sender)
Message-ID: <50D7D3E1.5070002@gmail.com>
Date: Sun, 23 Dec 2012 20:02:41 -0800
From: Lance Norskog <goksron@gmail.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
 rv:17.0) Gecko/17.0 Thunderbird/17.0
MIME-Version: 1.0
To: java-user@lucene.apache.org
Subject: Re: how to implement a TokenFilter?
References: 
 <CANO68EP-6A+X0GYEoYqCgai-P7riPzJARsNLq-D-WY8pxerkvg@mail.gmail.com>
 <282263637.20121222153731@alud.com.pl>
 <CANO68EM1xQ2ZsMkBKA6YDhO2m_v08t3-3c8m79tmFDp+ChdnQw@mail.gmail.com>
 <1521985365.20121223090100@alud.com.pl>
 <CAOeWMMqaZfWKZncXAZ8ne_Zg1XP45PXjebuojzErnWzsgXQb3w@mail.gmail.com>
 <CANO68EN7PuUS_-ZrWyqBmvxR6u_FjqLRfddoc5Wc413kvoj+bQ@mail.gmail.com>
In-Reply-To: 
 <CANO68EN7PuUS_-ZrWyqBmvxR6u_FjqLRfddoc5Wc413kvoj+bQ@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

You need to use an IDE. Find the Attribute type and show all subclasses. 
This shows a lot of rare ones and a few which are used a lot. Now, look 
at source code for various TokenFilters and search for other uses of the 
Attributes you find. This generally is how I figured it out.

Also, after the full Analyzer stack is called, the caller saves the 
output (I guess to codecs?). You can look at which Attributes it saves.

On 12/23/2012 06:30 PM, Xi Shen wrote:
> thanks a lot :)
>
>
> On Mon, Dec 24, 2012 at 10:22 AM, feng lu <amuseme.lu@gmail.com> wrote:
>
>> hi Shen
>>
>> May be you can see some source code in org.apache.lucene.analysis package,
>> such LowerCaseFilter.java,StopFilter.java and so on.
>>
>> and some common attribute includes:
>>
>> offsetAtt = addAttribute(OffsetAttribute.class);
>> termAtt = addAttribute(CharTermAttribute.class);
>> typeAtt = addAttribute(TypeAttribute.class);
>>
>> Regards
>>
>>
>> On Sun, Dec 23, 2012 at 4:01 PM, Rafał Kuć <r.kuc@solr.pl> wrote:
>>
>>> Hello!
>>>
>>> The simplest way is to look at Lucene javadoc and see what
>>> implementations of Attribute interface there are -
>>>
>> http://lucene.apache.org/core/4_0_0/core/org/apache/lucene/util/Attribute.html
>>> --
>>> Regards,
>>>   Rafał Kuć
>>>   Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch
>>>
>>>> thanks, i read this ready. it is useful, but it is too 'small'...
>>>> e.g. for this.charTermAttr = addAttribute(CharTermAttribute.class);
>>>> i want to know what are the other attributes i need in order to
>> implement
>>>> my function. where i can find a references to these attributes? i tried
>>> on
>>>> lucene & solr wiki, but all i found is a list of the names of these
>>>> attributes, nothing about what are they capable of...
>>>
>>>
>>>
>>>> On Sat, Dec 22, 2012 at 10:37 PM, Rafał Kuć <r.kuc@solr.pl> wrote:
>>>>> Hello!
>>>>>
>>>>> A small example with some explanation can be found here:
>>>>> http://solr.pl/en/2012/05/14/developing-your-own-solr-filter/
>>>>>
>>>>> --
>>>>> Regards,
>>>>>   Rafał Kuć
>>>>>   Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch
>>>>>
>>>>>> Hi,
>>>>>> I need a guide to implement my own TokenFilter. I checked the wiki,
>>> but I
>>>>>> could not find any useful guide :(
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>>>
>>>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>
>>>
>>
>> --
>> Don't Grow Old, Grow Up... :-)
>>
>
>


---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org