Hi all, Would you mind to explain me or/and send some links on explanations for what Lucene is good and supposed to be used and for what it is not good and not supposed to be used?
Thanks a lot in advance, Ira -----Original Message----- From: Tomoko Uchida <tomoko.uchida.1...@gmail.com> Sent: Wednesday, August 1, 2018 2:35 PM To: java-user@lucene.apache.org Subject: Re: Search in lines, so need to index lines? Ira, I do not understand your requirements, but essentially lucene is not for regex searching. There are tools for fast regular expression search, if you do not satisfy with java standard library, for example: https://github.com/google/re2j And yes, grep command would be the best tool for you. Tomoko 2018年8月1日(水) 20:01 Gordin, Ira <ira.gor...@sap.com>: > Hi Tomoko, > > I need to search in many files and we use Lucene for this purpose. > > Thanks, > Ira > > -----Original Message----- > From: Tomoko Uchida <tomoko.uchida.1...@gmail.com> > Sent: Wednesday, August 1, 2018 1:49 PM > To: java-user@lucene.apache.org > Subject: Re: Search in lines, so need to index lines? > > Hi Ira, > > > I am trying to implement regex search in file > > Why are you using Lucene for regular expression search? > You can implement this by simply using java.util.regex package? > > Regards, > Tomoko > > 2018年8月1日(水) 0:18 Gordin, Ira <ira.gor...@sap.com>: > > > Hi Uwe, > > > > I am trying to implement regex search in file the same as in editors, in > > Notepad++ for example. > > > > Thanks, > > Ira > > > > -----Original Message----- > > From: Uwe Schindler <u...@thetaphi.de> > > Sent: Tuesday, July 31, 2018 6:12 PM > > To: java-user@lucene.apache.org > > Subject: RE: Search in lines, so need to index lines? > > > > Hi, > > > > you need to create your own tokenizer that splits tokens on \n or \r. > > Instead of using WhitespaceTokenizer, you can use: > > > > Tokenizer tok = CharTokenizer. fromSeparatorCharPredicate(ch -> ch=='\r' > > || ch=='\n'); > > > > But I would first think of how to implement the whole thing correctly. > > Using a regular expression as "default" query is slow and does not look > > correct. What are you trying to do? > > > > Uwe > > > > ----- > > Uwe Schindler > > Achterdiek 19, D-28357 Bremen > > http://www.thetaphi.de > > eMail: u...@thetaphi.de > > > > > -----Original Message----- > > > From: Gordin, Ira <ira.gor...@sap.com> > > > Sent: Tuesday, July 31, 2018 4:08 PM > > > To: java-user@lucene.apache.org > > > Subject: Search in lines, so need to index lines? > > > > > > Hi all, > > > > > > I understand Lucene knows to find query matches in tokens. For example > > if I > > > use WhiteSpaceTokenizer and I am searching with /.*nice day.*/ regular > > > expression, I'll always find nothing. Am I correct? > > > In my project I need to find matches inside lines and not inside words, > > so I > > > am considering to tokenize lines. How I should to implement this idea? > > > I'll really appriciate you have more ideas/implementations. > > > > > > Thanks in advance, > > > Ira > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > -- > Tomoko Uchida > -- Tomoko Uchida
