[rules-users] Custom Evaluator compile time error, If I am upgrading from drool 5.0 to 5.3

[Wolfgang Laun]

Use OBJECT_TYPE instead of STRING_TYPE:
   addEvaluator( ValueType.OBJECT_TYPE,
   super( ValueType.OBJECT_TYPE, ...)

But consider using the built-in operator "in", e.g.:
   Student(code in  ("426656000", "426979002", "427295004" ) )

-W


On 24/01/2012, kashif10 <kash452 at yahoo.com> wrote:
> Hi,
>
> Our current code is using drools 5.0.
> We have some custom evaluators, which are working fine with 5.0.
>
> example
> *Code from Rule:*
> Student(code compareCode "426656000, 426979002, 427295004" )
>
> Where Student is a class &  "code" is String field in that class. &
> compareCode is a custom operator using custom evaluator. as follows.
>
> *code from OP class:*
> public static final Operator  COMPARE_CODE  =
> Operator.addOperatorToRegistry( "compareCode",
>             false );
>
>
> *Part from Evaluator Definitions class*
>
>    private EvaluatorCache evaluators = new EvaluatorCache() {
> 	        private static final long serialVersionUID = 100L;
> 	        {
> addEvaluator( ValueType.STRING_TYPE,         D1Operator.COMPARE_CODE,
> 	
> CodeEvaluator.INSTANCE );
>  }
> 	    };
>
>
>
>
>
> 		public static class CodeEvaluator extends BaseEvaluator {
>
> 	        private static final long     serialVersionUID = 100L;
> 			public final static Evaluator INSTANCE         = new CodeEvaluator();
>
> 			public CodeEvaluator() {
> 	            super( ValueType.STRING_TYPE,
> 	                   D1Operator.COMPARE_CODE );
> 	        }
>
> 			public boolean evaluate(InternalWorkingMemory workingMemory,
> 	                                final InternalReadAccessor extractor,
> 	                                final Object object1,
> 	                                final FieldValue object2) {
> 	            final Object value1 = extractor.getValue( workingMemory,
> 	                                                      object1 );
> 	
> 	            //System.out.println("************* in
> CodeEqualEvaluator.evaluate");
> 	            final Object value2 = object2.getValue();
> 	            if ( value1 == null ) {
> 	                return value2 == null;
> 	            }
> 	            //return value1.equals( value2 );
> 	            return  Utility.checkCode((String)value2, (String)value1);
> 	
> 	        }
>
>
> Problem:
> Now If I update my Eclipse Drool plugin to 5.2.1 or 5.3 I start getting
> error
>  Evaluator  does not support type 'ValueType = 'Object'
>  see attached snapshot/
>
> http://drools.46999.n3.nabble.com/file/n3683440/Drool_problem.jpg
> Drool_problem.jpg
>
>
> Thanks.
>
>
>
> --
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> Sent from the Drools: User forum mailing list archive at Nabble.com.
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