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From Alexandre Rafalovitch <arafa...@gmail.com>
Subject Re: indexing java byte code in classes / jars
Date Sat, 09 May 2015 09:21:04 GMT
If you only have classes/jars, use ASM. I have done this before, have some
ugly code to share if you want.

If you have sources, javadoc 8 is a good way too. I am doing that now for
solr-start.com, code on Github.

Regards,
    Alex
On 9 May 2015 7:09 am, "Mark" <javamark@gmail.com> wrote:

> To answer why bytecode - because mostly the use case I have is looking to
> index as much detail from jars/classes.
>
> extract class names,
> method names
> signatures
> packages / imports
>
> I am considering using ASM in order to generate an analysis view of the
> class
>
> The sort of usecases I have would be method / signature searches.
>
> For example;
>
> 1) show any classes with a method named parse*
>
> 2) show any classes with a method named parse that passes in a type *json*
>
> ...etc
>
> In the past I have written something to reverse out javadocs from just java
> bytecode, using solr would move this idea considerably much more powerful.
>
> Thanks for the suggestions so far
>
>
>
>
>
>
>
> On 8 May 2015 at 21:19, Erik Hatcher <erik.hatcher@gmail.com> wrote:
>
> > Oh, and sorry, I omitted a couple of details:
> >
> > # creating the “java” core/collection
> > bin/solr create -c java
> >
> > # I ran this from my Solr source code checkout, so that
> > SolrLogFormatter.class just happened to be handy
> >
> >         Erik
> >
> >
> >
> >
> > > On May 8, 2015, at 4:11 PM, Erik Hatcher <erik.hatcher@gmail.com>
> wrote:
> > >
> > > What kinds of searches do you want to run?  Are you trying to extract
> > class names, method names, and such and make those searchable?   If
> that’s
> > the case, you need some kind of “parser” to reverse engineer that
> > information from .class and .jar files before feeding it to Solr, which
> > would happen before analysis.   Java itself comes with a javap command
> that
> > can do this; whether this is the “best” way to go for your scenario I
> don’t
> > know, but here’s an interesting example pasted below (using Solr 5.x).
> > >
> > > —
> > > Erik Hatcher, Senior Solutions Architect
> > > http://www.lucidworks.com
> > >
> > >
> > > javap
> > build/solr-core/classes/java/org/apache/solr/SolrLogFormatter.class >
> > test.txt
> > > bin/post -c java test.txt
> > >
> > > now search for "coreInfoMap"
> > http://localhost:8983/solr/java/browse?q=coreInfoMap
> > >
> > > I tried to be cleverer and use the stdin option of bin/post, like this:
> > > javap
> > build/solr-core/classes/java/org/apache/solr/SolrLogFormatter.class |
> > bin/post -c java -url http://localhost:8983/solr/java/update/extract
> > -type text/plain -params "literal.id=SolrLogFormatter" -out yes -d
> > > but something isn’t working right with the stdin detection like that
> (it
> > does work to `cat test.txt | bin/post…` though, hmmm)
> > >
> > > test.txt looks like this, `cat test.txt`:
> > > Compiled from "SolrLogFormatter.java"
> > > public class org.apache.solr.SolrLogFormatter extends
> > java.util.logging.Formatter {
> > >  long startTime;
> > >  long lastTime;
> > >  java.util.Map<org.apache.solr.SolrLogFormatter$Method,
> > java.lang.String> methodAlias;
> > >  public boolean shorterFormat;
> > >  java.util.Map<org.apache.solr.core.SolrCore,
> > org.apache.solr.SolrLogFormatter$CoreInfo> coreInfoMap;
> > >  public java.util.Map<java.lang.String, java.lang.String> classAliases;
> > >  static java.lang.ThreadLocal<java.lang.String> threadLocal;
> > >  public org.apache.solr.SolrLogFormatter();
> > >  public void setShorterFormat();
> > >  public java.lang.String format(java.util.logging.LogRecord);
> > >  public void appendThread(java.lang.StringBuilder,
> > java.util.logging.LogRecord);
> > >  public java.lang.String _format(java.util.logging.LogRecord);
> > >  public java.lang.String getHead(java.util.logging.Handler);
> > >  public java.lang.String getTail(java.util.logging.Handler);
> > >  public java.lang.String formatMessage(java.util.logging.LogRecord);
> > >  public static void main(java.lang.String[]) throws
> java.lang.Exception;
> > >  public static void go() throws java.lang.Exception;
> > >  static {};
> > > }
> > >
> > >> On May 8, 2015, at 3:31 PM, Mark <javamark@gmail.com> wrote:
> > >>
> > >> I looking to use Solr search over the byte code in Classes and Jars.
> > >>
> > >> Does anyone know or have experience of Analyzers, Tokenizers, and
> Token
> > >> Filters for such a task?
> > >>
> > >> Regards
> > >>
> > >> Mark
> > >
> >
> >
>

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