Try changing your BOM_TRANSACTION_DETAILS Display() method access to public and see if it works. Currently, you have it as "void Display()" in your BOM_TRANSACTION_DETAILS method declaration. Change it to "public void Display()". It might solve your problem. No need to change method declaration in the interface as it's correct. -Chris On Dec 2, 2009, at 1:35 AM, Deepak Jambhekar wrote:

Problem is with your interface modifier declaration. Your modifier is "default" , convert that to "public" and it should be fine. Change interface Generalized TO public interface Generalized You don't have to set "public" modifier to the "Display" method - by default interface method visibility is "public". Vijay ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Deepak Jambhekar Sent: Wednesday, December 02, 2009 9:10 PM To: Rules Users List Subject: Re: [rules-users] Interface implementation not working.. I am still getting the same error even after making that method as public... ?? Thanks Deepak Jambhekar -----rules-users-bounces(a)lists.jboss.org wrote: ----- To: Rules Users List <rules-users(a)lists.jboss.org&gt; From: CK <chrisckc(a)gmail.com&gt; Sent by: rules-users-bounces(a)lists.jboss.org Date: 12/02/2009 10:28PM Subject: Re: [rules-users] Interface implementation not working.. Try changing your BOM_TRANSACTION_DETAILS Display() method access to public and see if it works. Currently, you have it as "void Display()" in your BOM_TRANSACTION_DETAILS method declaration. Change it to "public void Display()". It might solve your problem. No need to change method declaration in the interface as it's correct. -Chris On Dec 2, 2009, at 1:35 AM, Deepak Jambhekar wrote: Hi.... I have created a rule which is as below rule "myrule" dialect "mvel" when tr : BOM_TRANSACTION_DETAILS( country == "CH" ) then tr.setCarrierName( "orange" ); tr.Display(); end And the Model class is defined as below... interface Generalized { void Display(); } public class BOM_TRANSACTION_DETAILS implements Generalized { getter and setter..... void Display() { ..... } } Now when I run this rule, it is giving me the following exception . Can any one please help me why this exception is coming....? and also when I removed the Display() from interface Generalized the code works fine... So is this because of Interface?? Can we use interface for defining Models..?? org.drools.runtime.rule.ConsequenceException : [Error: tr.Display(): Class org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer can not access a member of class com.drools.icas.transaction.Generalized with modifiers "public abstract"] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException( DefaultConsequenceExceptionHandler.java:23 ) at org.drools.common.DefaultAgenda.fireActivation( DefaultAgenda.java:943 ) at org.drools.common.DefaultAgenda.fireNextItem( DefaultAgenda.java:885 ) at org.drools.common.DefaultAgenda.fireAllRules( DefaultAgenda.java:1082 ) at org.drools.common.AbstractWorkingMemory.fireAllRules( AbstractWorkingMemory.java:682 ) at org.drools.common.AbstractWorkingMemory.fireAllRules( AbstractWorkingMemory.java:649 ) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules( StatefulKnowledgeSessionImpl.java:177 ) at com.drools.icas.transaction.DemoTest.main( DemoTest.java:92 ) Caused by: [Error: tr.Display(): Class org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer can not access a member of class com.drools.icas.transaction.Generalized with modifiers "public abstract"] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0] at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain( ReflectiveAccessorOptimizer.java:382 ) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor( ReflectiveAccessorOptimizer.java:140 ) at org.mvel2.ast.ASTNode.getReducedValueAccelerated( ASTNode.java:137 ) at org.mvel2.MVELRuntime.execute( MVELRuntime.java:91 ) at org.mvel2.compiler.CompiledExpression.getValue( CompiledExpression.java:101 ) at org.mvel2.MVEL.executeExpression( MVEL.java:968 ) at org.drools.base.mvel.MVELConsequence.evaluate( MVELConsequence.java:89 ) at org.drools.common.DefaultAgenda.fireActivation( DefaultAgenda.java:934 ) ... 6 more Caused by: java.lang.IllegalAccessException : Class org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer can not access a member of class com.drools.icas.transaction.Generalized with modifiers "public abstract" at sun.reflect.Reflection.ensureMemberAccess( Reflection.java:65 ) at java.lang.reflect.Method.invoke( Method.java:583 ) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod( ReflectiveAccessorOptimizer.java:936 ) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain( ReflectiveAccessorOptimizer.java:321 ) ... 13 more Thanks.... Deepak Jambhekar =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you