[rules-users] Declared Types with large number of fields

[Michael Anstis]

I think this answers your question:
https://issues.jboss.org/browse/JBRULES-3621

You could try 5.5.0.Beta1 which includes the fix.

On 2 October 2012 10:56, Phani Saripalli <saripalli.phani at gmail.com> wrote:

> Hi.
> I am using declared types in .drl rule rule. When I kept the number of
> fields in a declared type low, drools works fine. When I am increasing the
> number of fields in a declared type to 300 or even more, drools raising an
> exception.
> Particularly, it is giving this.
>
>
> ava.lang.ClassFormatError: Too many arguments in method signature in class
> file com/sample/Project
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
>         at
>
> org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
>         at
>
> org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
>         at
>
> org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>         at
> org.drools.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:155)
>         at
>
> org.drools.compiler.PackageBuilder.processTypeDeclarations(PackageBuilder.java:2049)
>         at
> org.drools.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1218)
>         at
> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:829)
>         at
>
> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:467)
>         at
>
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:673)
>         at
>
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:45)
>         at
>
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:34)
>         at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:67)
>         at com.sample.DroolsTest.main(DroolsTest.java:24)
>
>
> I suspect, it is something to do with creating class, constructor with so
> many arguments at run time. I am looking for a solution, something like
> declared types, or a workaround. The purpose for which I am using Drools
> limits to use the traditional Java classes, or defining a Java class.
> Also, is there any way, to perform calculations, or value propagations.
> That, Drools could assume some value to a variable given a certain
> constraint on it.
>
> For example, x > 6 && x < 9, Drools could assume x as 7 or 8 and fire
> rules?
>
> Thank you.
> Phani
>
>
>
> --
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> http://drools.46999.n3.nabble.com/Declared-Types-with-large-number-of-fields-tp4020076.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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