Re: Access indexed terms
On 2010-05-14 11:35, manjula wijewickrema wrote: Hi, Is it possible to put the indexed terms into an array in lucene. For example, imagine I have indexed a single document in Lucene and now I want to acces those terms in the index. Is it possible to retrieve (call) those terms as array elements? If it is possible, then how? In short: unless you created TermFrequencyVector when adding the document, the answer is with great difficulty. For a working code that does this see here: http://code.google.com/p/luke/source/browse/trunk/src/org/getopt/luke/DocReconstructor.java If you really need such kind of access in your application then add your documents with term vectors with offsets and positions. Even then, depending on the Analyzer you used, the process is lossy - some input data that was discarded by Analyzer is simply no longer available. -- Best regards, Andrzej Bialecki ___. ___ ___ ___ _ _ __ [__ || __|__/|__||\/| Information Retrieval, Semantic Web ___|||__|| \| || | Embedded Unix, System Integration http://www.sigram.com Contact: info at sigram dot com - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: Access indexed terms
Hi Andrzej Thanx for the reply. But as you have mentioned, creating arrays for indexed terms seems to be little difficult. Here my intention is to find the term frequencies (of terms) of an indexed document. I can find the term frequency of a particular term (giving as a query) if I specify the term in the code. But I really want is to get the term frequency (or even the number of times it appears in the document) of the all indexed terms (or high frequency terms) without named them in the code. Is there an alternative way to do that? Thanks Manjula On Fri, May 14, 2010 at 4:00 PM, Andrzej Bialecki a...@getopt.org wrote: On 2010-05-14 11:35, manjula wijewickrema wrote: Hi, Is it possible to put the indexed terms into an array in lucene. For example, imagine I have indexed a single document in Lucene and now I want to acces those terms in the index. Is it possible to retrieve (call) those terms as array elements? If it is possible, then how? In short: unless you created TermFrequencyVector when adding the document, the answer is with great difficulty. For a working code that does this see here: http://code.google.com/p/luke/source/browse/trunk/src/org/getopt/luke/DocReconstructor.java If you really need such kind of access in your application then add your documents with term vectors with offsets and positions. Even then, depending on the Analyzer you used, the process is lossy - some input data that was discarded by Analyzer is simply no longer available. -- Best regards, Andrzej Bialecki ___. ___ ___ ___ _ _ __ [__ || __|__/|__||\/| Information Retrieval, Semantic Web ___|||__|| \| || | Embedded Unix, System Integration http://www.sigram.com Contact: info at sigram dot com - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: Access indexed terms
On 2010-05-14 14:24, manjula wijewickrema wrote: Hi Andrzej Thanx for the reply. But as you have mentioned, creating arrays for indexed terms seems to be little difficult. Here my intention is to find the term frequencies (of terms) of an indexed document. I can find the term frequency of a particular term (giving as a query) if I specify the term in the code. But I really want is to get the term frequency (or even the number of times it appears in the document) of the all indexed terms (or high frequency terms) without named them in the code. Is there an alternative way to do that? Yes, see the discussion here: https://issues.apache.org/jira/browse/LUCENE-2393 -- Best regards, Andrzej Bialecki ___. ___ ___ ___ _ _ __ [__ || __|__/|__||\/| Information Retrieval, Semantic Web ___|||__|| \| || | Embedded Unix, System Integration http://www.sigram.com Contact: info at sigram dot com - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: Access indexed terms
Dear Andrzej, Thanx for your valuable help. I also noticed this HighFreqTerms approach in the Lucene email archive and try to use it. In order to do that I have downloaded lucene-misc-2.9.1.jar and added org.apache.lucene.misc package into my project. Now I think I have to call this HighFreqTerms class in my code. But I was unable to find any guidence of how to do it? If you can pls. be kind enough to tell me how can I use this class in my code. Thanx Manjula On Fri, May 14, 2010 at 6:16 PM, Andrzej Bialecki a...@getopt.org wrote: On 2010-05-14 14:24, manjula wijewickrema wrote: Hi Andrzej Thanx for the reply. But as you have mentioned, creating arrays for indexed terms seems to be little difficult. Here my intention is to find the term frequencies (of terms) of an indexed document. I can find the term frequency of a particular term (giving as a query) if I specify the term in the code. But I really want is to get the term frequency (or even the number of times it appears in the document) of the all indexed terms (or high frequency terms) without named them in the code. Is there an alternative way to do that? Yes, see the discussion here: https://issues.apache.org/jira/browse/LUCENE-2393 -- Best regards, Andrzej Bialecki ___. ___ ___ ___ _ _ __ [__ || __|__/|__||\/| Information Retrieval, Semantic Web ___|||__|| \| || | Embedded Unix, System Integration http://www.sigram.com Contact: info at sigram dot com - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
