Unable to query d2rq ttl file from Jena -

-

i trying query d2rq-generated ttl file. following code snippet:

        modeld2rq m = new modeld2rq("file:c:\\users\\599782\\downloads\\d2rq-0.8.1\\northwind.ttl");         string sparql =              "prefix vocab: <http://localhost:2020/resource/vocab/>" +             "select ?firstname ?lastname where{"+                 "?x vocab:employees_country 'usa'."+                 "?x vocab:employees_firstname ?firstname."+                 "?x vocab:employees_lastname ?lastname."+             "}";         query q = queryfactory.create(sparql);          resultset rs = queryexecutionfactory.create(q, m).execselect();         resultsetformatter.out(system.out, rs, q);         m.close();

and shows exception:

exception in thread "main" java.lang.incompatibleclasschangeerror: class com.hp.hpl.jena.sparql.algebra.op.opproject not implement requested interface org.openjena.atlas.io.printable @ org.openjena.atlas.io.printutils.tostring(printutils.java:28) @ de.fuberlin.wiwiss.d2rq.engine.queryengined2rq.translate(queryengined2rq.java:70) @ de.fuberlin.wiwiss.d2rq.engine.queryengined2rq.modifyop(queryengined2rq.java:60) @ com.hp.hpl.jena.sparql.engine.queryenginebase.createplan(queryenginebase.java:94) @ com.hp.hpl.jena.sparql.engine.queryenginebase.getplan(queryenginebase.java:87) @ de.fuberlin.wiwiss.d2rq.engine.queryengined2rq$queryenginefactoryd2rq.create(queryengined2rq.java:110) @ com.hp.hpl.jena.sparql.engine.queryexecutionbase.getplan(queryexecutionbase.java:513) @ com.hp.hpl.jena.sparql.engine.queryexecutionbase.startqueryiterator(queryexecutionbase.java:490) @ com.hp.hpl.jena.sparql.engine.queryexecutionbase.execresultset(queryexecutionbase.java:498) @ com.hp.hpl.jena.sparql.engine.queryexecutionbase.execselect(queryexecutionbase.java:194) @ com.jenaproj.hellojena.main(hellojena.java:159)

anyone have idea might going on.

java.lang.incompatibleclasschangeerror

you have incompatible versions of jars on classpath.

if use jena jars d2rq should correct version, otherwise need version of d2rq compiled against jena jars wish use.


Comments

Post a Comment

Popular posts from this blog

c++ - llvm function pass ReplaceInstWithInst malloc -

-
#include "llvm/pass.h" #include "llvm/ir/module.h" #include "llvm/ir/function.h" #include "llvm/support/raw_ostream.h" #include "llvm/ir/legacypassmanager.h" #include "llvm/ir/instrtypes.h" #include "llvm/transforms/ipo/passmanagerbuilder.h" #include "llvm/ir/irbuilder.h" #include "llvm/transforms/utils/basicblockutils.h" using namespace llvm; namespace { struct replacepass : public functionpass { static char id; replacepass() : functionpass(id) {} virtual bool runonfunction(function &f) { allocainst* insttoreplace = ??? basicblock::iterator ii(insttoreplace); replaceinstwithinst(insttoreplace->getparent()->getinstlist(), ii, new allocainst(type::int32ty, 0, insttoreplace)); return true; } }; } char replacepass::id = 0; static void registerreplacepass(const passmanagerbuilder &, legacy::passmanagerbase &pm) { pm.add(new re...
Read more

Cross-Compiling Linux Kernel for Raspberry Pi - ${CCPREFIX}gcc -v does not work -

-
i'm trying follow this guide . i'm running both ubuntu 12.04.5 lts (gnu/linux 3.13.0-74-generic x86_64) on "real" hardware , 14.04.1 via virtualbox on mac. problem don't past step 1: hoffmann@angl99:~$ export ccprefix=/home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf- hoffmann@angl99:~$ ${ccprefix}gcc -v i'm getting following error: -bash: /home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc: no such file or directory however, file i'm told missing there: hoffmann@angl99:~$ less /home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc "/home/hoffmann/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc" may binary file. see anyway? this result of basic error/misconception. suggest solution? thanks! sebastian ok - i've worked out (with of person po...
Read more

java.lang.NoClassDefFoundError When Creating New Android Project -

-
i've tried installing (and re-installing) android studio several times now, , each time, studio isn't able create new android project. when attempt initial android studio window (ie. basic 'create', 'open', 'import' etc options), i'm asked of questions in wizard, brief progress dialog, followed nothing @ all. if open incomplete project process creates choosing 'open' list, can try choosing create new android project menu. this has same issue, error message in output console time... java.lang.noclassdeffounderror: com/sun/xml/internal/bind/v2/model/annotation/annotationreader (wrong name: com/sun/xml/internal/bind/v0/model/qnnotation/annotationreader) note: when installed android studio, installed incompatible jdk (1.8, not 1.7). have had go default project settings change jdk uses 1.8. does know how can avoid this? there place should downloading jxb classes? missing in java paths? this appears have been caused cor...
Read more