Re: [rules-dev] Functional programming in Drools: java 5 minimum with java 8 support

** The minimum java version we require (currently java 5) need not be the same as the maximum java version language features we support. For example, drools 6 could require at least java 5 to run, but - if source>=7 and target>=7 you can use switch(String) and other coin stuff in DRL functions - if source>=8 and target>=8 you can use closures in DRL functions The point is... drools-core source code itself can't use that stuff (unless it's in the extension module drools-core-jdk7). Spring 2.0.0 did something similar IIRC: it required at least JDK 1.4, but if it detected JDK 1.5 you could use annotations too. Note: despite all that, I still wish we move the minimum java version to 6 :) Op 20-10-11 13:26, Wolfgang Laun schreef: Last time Mark asked, there was a huge outcry - some people using some Java that's standing still at Java 5. -W On 20 October 2011 13:21, Toni Rikkola <toni.rikkola(a)gmail.com&gt; wrote: > I would also like to keep it as close to Java as possible. > > There are few problems here: > * It could never go beyond Java > * We are using Java 5 and just considering Java 6, this would be a huge > leap :-) > > But then again if we don't use the Java way, then what will we do when > Drools reaches Java 8, support both? > > Toni > > On Oct 20, 2011, at 11:08 AM, Geoffrey De Smet wrote: > > Interesting stuff. > This is basically > "closures" which will be available in JDK 8 > + LHS closure pattern support > > 1) About "closures" which will be available in JDK 8: > Since functions contain Java code, which is imperative, not declarative, I > don't consider that DRL turf any more. > *Our closure syntax should there should be exactly the same as Java 8.* > Here's their syntax, which looks the same on first sight, but the devil is > in the details (= unreleased spec): > > http://mail.openjdk.java.net/pipermail/lambda-dev/2011-September/003936.html > Either we wait for JDK 8 to be released to support closures (current > release date is 2012 according to Mark R.'s "plan B" that released JDK 7 in > 2011) > or we implement it just like the JDK8 with the exact same syntax (which is > a LOT of work). > > 2) About LHS closure pattern support. > This builds on top of 1) to allow usage of closures in the LHS. > Cool stuff, I like the piping idea. > > Op 19-10-11 23:12, Mauricio Salatino schreef: > > Hi Mario, that document looks great.. I will take some time to read it and > I will try to give some feedback. > I was playing with cypher (from neo4j, a graph oriented DB) (total newbie > on that) but looking at your in line acc functions I think that we can take > some concepts from cypher and apply them in DRL. > Cheers > > On Wed, Oct 19, 2011 at 5:59 PM, Mario Fusco <mario.fusco(a)gmail.com&gt;wrote: > >> Hi all, >> >> as anticipated by Mark, I put down some ideas on how we could start >> introducing some functional programming features in the DRL. >> >> http://community.jboss.org/wiki/FunctionalProgrammingInDrools >> >> It's needless to say that the document has to been considered just a >> draft in its very first stage and any feedback or suggestion to improve or >> clarify it is welcome. >> >> Mario >> >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev >> >> > > > -- > - CTO @ http://www.plugtree.com > - MyJourney @ http://salaboy.wordpress.com > - Co-Founder @ http://www.jugargentina.org > - Co-Founder @ http://www.jbug.com.ar > > - Salatino "Salaboy" Mauricio - > > > _______________________________________________ > rules-dev mailing listrules-dev@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-dev > > > -- > With kind regards, > Geoffrey De Smet > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > _______________________________________________ rules-dev mailing listrules-dev@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-dev -- With kind regards, Geoffrey De Smet _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev