On 17 April 2012 16:42, Shur, Bob <robert.shur@hp.com> wrote:

I'm repeating this post because I didn't get an answer last time. Is this the wrong place to report a bug? If so, where is the right place? I'm trying to understand whether this is really a bug or whether I'm doing something wrong.

I have what looks to me like a Drools bug on a simple drl with declared classes. I'm using version drools-distribution-5.3.0.Final.

I'm invoking it with this:

StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
List<Object> facts = new ArrayList<Object>();
ksession.execute( facts );

=============================

I get this crash:

Exception in thread "main" java.lang.NoClassDefFoundError: com/sample/Cap
at ASMAccessorImpl_129541121334339192620.getValue(Unknown Source)
at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:103)
at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
at org.mvel2.MVEL.executeExpression(MVEL.java:952)
...

==========================

Here's the drl file:

package com.sample

import com.sample.*;

declare Item
id : int;
end

declare Priority
name : String;
priority : int;
end

declare Cap
item : Item;
name : String
end

rule "split cart into items"
when
then
insert(new Item(1));
insert(new Item(2));
insert(new Item(3));
end

rule "Priorities"
when
then
insert(new Priority("A", 3));
insert(new Priority("B", 2));
insert(new Priority("C", 5));
end

rule "Caps"
when
$i : Item()
$p : Priority($name : name)
then
insert(new Cap($i, $name));
end

rule "test"
when
$i : Item()
Cap(item.id == $i.id)
then
System.out.println("Cap");
end

====================

Some observations:
- If I comment out any of the insert lines, the crash goes away
- If I change the first field of class Cap to be id:int instead of item:Item and make the corresponding changes, the crash goes away

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