Hi Luigi, The dependency is just a jar, so it is not that much of a hassle anyway. I'd suggest you go with ANTLR. Have a look at the Hibernate HQL parser and see how they have integrated it into the Hibernate project. Here is the grammar https://github.com/hibernate/hibernate-orm/blob/master/hibernate-core/src/main/antlr/hql.g
You can always have a look at the whole source code to see how it was integrated. I guess it is easier if you follow some working example. Take care! Fidel H Viegas On Mon, Aug 11, 2014 at 10:24 AM, Luigi Dell'Aquila < [email protected]> wrote: > Hi, > > Thank you very much for your feedback, I'm in charge of this task and I'm > about to start it. > I'm not a parser expert, so I'm still studying all these frameworks (I did > something with JavaCC in the past, but nothing very complex). > My first impression is that JavaCC is very good for low level control of > generated code, while ANTLR is much easier and clearer in the grammar > syntax. > Of course avoiding a new dependency is a pro for JavaCC. > Anyway, writing the grammar is only a part of the job, the real challenge > will be integrating the new parser with existing OrientDB code and > improving all the related functions (eg. query optimization). > > I will let you know about the progress of my work > > Regards > > Luigi > > > > > > > 2014-08-09 21:28 GMT+02:00 Fidel H Viegas <[email protected]>: > >> >> >> >> On Sat, Aug 9, 2014 at 6:28 PM, Curtis Ruck <[email protected]> >> wrote: >> >>> I've used antlr 3 & 4, and the changes in 4 make it extremely easy to >>> use, within the scope of parsing grammars. The only benefit to javacc that >>> I'm aware of is the lack of a runtime dependency, but I believe the >>> flexibility during grammar development more than makes up for it since the >>> antlr license is friendly. >>> >>> >>> >> I haven't played with ANTLR in a while, but I have used antlr 3 last >> year. JavaCC on its own without JJTree is not as easy as SableCC or ANTLR >> with regards to tree traversals. I tried to use it in a project a couple of >> years ago, but dumped it over SableCC due to simplicity. It was faster than >> SableCC, though. >> >> What are you guys using at the moment? >> >> Regards, >> >> Fidel H Viegas >> >> -- >> >> --- >> You received this message because you are subscribed to the Google Groups >> "OrientDB" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > > --- > You received this message because you are subscribed to the Google Groups > "OrientDB" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- --- You received this message because you are subscribed to the Google Groups "OrientDB" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
