Re: Lambda Expressions and JavaCompiler problem

Hi Jeroen,

yes, the version 8.0.5296.

Alessandro


2014-07-07 9:38 GMT+01:00 Jeroen Frijters <[email protected]>:

> Hi Alessandro,
>
> Are you using the most recent IKVM snapshot?
>
> Regards,
> Jeroen
>
> > -----Original Message-----
> > From: Alessandro Montanari [mailto:[email protected]]
> > Sent: Monday, July 7, 2014 9:43
> > To: [email protected]
> > Subject: [Ikvm-developers] Lambda Expressions and JavaCompiler problem
> >
> > Hi,
> > we are using IKVM to provide the .NET version of the tuProlog engine
> > (http://apice.unibo.it/xwiki/bin/view/Tuprolog/).
> > In the recent weeks we added support for lambdas expressions into the
> > java version, so the user can write his own lambda ((s1,s2) ->
> > s1.indexOf(s2) for example) and use it inside a prolog program.
> >
> > In practice what we are doing in java is the following:
> > 1 - at runtime we build the string of a class that contains the user's
> > lambda, for example:
> > public class MyLambda {
> >      public java.util.function.BiFunction<String, String, Integer>
> > getFunction() {
> >       return <here the user's lambda>;
> >      }
> > }
> > 2 - we use the class javax.tools.JavaCompiler to compile the class on
> > the fly;
> > 3 - we instantiate the class and then we use the function returned by
> > the method "getFunction()".
> >
> > In order to make it run on IKVM we added the following line before the
> > retrieving of the JavaCompiler:
> > ikvm.runtime.Startup.addBootClassPathAssemby(Assembly.Load("IKVM.OpenJDK
> > .Tools"));
> > jc = ToolProvider.getSystemJavaCompiler();
> >
> > Now the problem is that when we try to excute what I described above
> > with a user's lambda we get this error:
> > An exception has occurred in the compiler (1.8.0-internal). Please file
> > a bug at the Java Developer Connection
> > (http://java.sun.com/webapps/bugreport)  after checking the Bug Parade
> > for duplicates. Include your program and the following diagnostic in
> > your report.  Thank you.
> > java.lang.ClassCastException: Unable to cast object of type
> > 'java.util.PropertyResourceBundle' to type
> > 'sun.util.resources.OpenListResourceBundle'.
> >         at
> > sun.util.resources.LocaleData.getCurrencyNames(LocaleData.java:84)
> >         at
> > sun.util.locale.provider.LocaleResources.getCurrencyName(LocaleResources
> > .java:216)
> >         at
> > sun.util.locale.provider.CurrencyNameProviderImpl.getString(CurrencyName
> > ProviderImpl.java:122)
> >         at
> > sun.util.locale.provider.CurrencyNameProviderImpl.getSymbol(CurrencyName
> > ProviderImpl.java:90)
> >         at
> > java.util.Currency$CurrencyNameGetter.getObject(Currency.java:647)
> >         at
> > java.util.Currency$CurrencyNameGetter.getObject(Currency.java:625)
> >         at
> > sun.util.locale.provider.LocaleServiceProviderPool.getLocalizedObjectImp
> > l(LocaleServiceProviderPool.java:281)
> >         at
> > sun.util.locale.provider.LocaleServiceProviderPool.getLocalizedObject(Lo
> > caleServiceProviderPool.java:265)
> >         at java.util.Currency.getSymbol(Currency.java:505)
> >         at
> > java.text.DecimalFormatSymbols.initialize(DecimalFormatSymbols.java:648)
> >         at
> > java.text.DecimalFormatSymbols.<init>(DecimalFormatSymbols.java:113)
> >         at
> > sun.util.locale.provider.DecimalFormatSymbolsProviderImpl.getInstance
> > (DecimalFormatSymbolsProviderImpl.java:85)
> >         at
> > java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:181
> > )
> >         at java.util.Formatter.getZero(Formatter.java:2283)
> >         at java.util.Formatter.<init>(Formatter.java:1892)
> >         at java.util.Formatter.<init>(Formatter.java:1914)
> >         at java.lang.StringHelper.format(StringHelper.java:2534)
> >         at
> > com.sun.tools.javac.comp.DeferredAttr$DeferredTypeMap.<init>(DeferredAtt
> > r.java:677)
> >         at com.sun.tools.javac.comp.Attr.checkMethod(Attr.java:3789)
> >         at com.sun.tools.javac.comp.Attr.checkIdInternal(Attr.java:3583)
> >         at
> > com.sun.tools.javac.comp.Attr.checkMethodIdInternal(Attr.java:3494)
> >         at com.sun.tools.javac.comp.Attr.checkMethodId(Attr.java:3468)
> >         at com.sun.tools.javac.comp.Attr.checkId(Attr.java:3455)
> >         at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1815)
> >         at
> > com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:14
> > 59)
> >         at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:597)
> >         at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:645)
> >         at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1596)
> >         at
> > com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java
> > :1290)
> >         at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:597)
> >         at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:665)
> >         at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:680)
> >         at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1127)
> >         at
> > com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:903)
> >         at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:597)
> >         at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:665)
> >         at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1020)
> >         at
> > com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:772)
> >         at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:597)
> >         at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:665)
> >         at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4308)
> >         at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4217)
> >         at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4149)
> >         at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4124)
> >         at
> > com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1252)
> >         at
> > com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:904)
> >         at
> > com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:864)
> >         at com.sun.tools.javac.main.Main.compile(Main.java:530)
> >         at
> > com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
> >         at
> > com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
> >         at
> > alice.util.proxyGenerator.Generator.compile(Generator.java:58)
> >         at alice.util.proxyGenerator.Generator.make(Generator.java:48)
> >         at alice.tuprolog.lib.OOLibrary.new_lambda_3(OOLibrary.java:287)
> >         at java.lang.reflect.Method.invoke(Method.java:472)
> >         at
> > alice.tuprolog.PrimitiveInfo.evalAsPredicate(PrimitiveInfo.java:123)
> >         at
> > alice.tuprolog.StateGoalEvaluation.doJob(StateGoalEvaluation.java:42)
> >         at alice.tuprolog.Engine.run(Engine.java:78)
> >         at alice.tuprolog.EngineRunner.solve(EngineRunner.java:179)
> >         at alice.tuprolog.EngineManager.solve(EngineManager.java:227)
> >         at alice.tuprolog.Prolog.solve(Prolog.java:435)
> >         at alice.tuprolog.Prolog.solve(Prolog.java:455)
> >         at alice.tuprologx.ide.EngineThread.run(EngineThread.java:52)
> > Compile failed:
> > public class MyLambdaFunction1 {
> >   public java.util.function.BiFunction<String,String,Integer>
> > getFunction() {
> >                 return (s1,s2) -> s1.indexOf(s2);
> >   }
> > }
> >
> > Does anybody have any idea?
> >
> > Thank you,
> > Alessandro
>

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