From: Zeke <xanadu860122(a)gmail.com&gt; Subject: [rules-users] meet Operator 'Operator = 'contains'' does not exist for StringEvaluator error To: rules-users(a)lists.jboss.org Date: Friday, January 16, 2009, 1:16 AM Hi, all: I meet a strange error when use "contains" operator on string type, My rule is like below: > package org.drools.examples; > > import org.drools.examples.HelloWorldExample.Message; > > rule "check str contains" > dialect "java" > when > m:Message( message contains "Hello" ) > then > System.out.println( "===check str contains ok===" ); > end It throw below exception: > Exception in thread "main" java.lang.RuntimeException: Operator 'Operator > = 'contains'' does not exist for StringEvaluator > at > org.drools.base.evaluators.StringFactory.getEvaluator(StringFactory.java:70) > at org.drools.base.ValueType.getEvaluator(ValueType.java:166) > at > org.drools.rule.builder.PatternBuilder.getEvaluator(PatternBuilder.java:900) > at > org.drools.rule.builder.PatternBuilder.buildRestriction(PatternBuilder.java:714) > at > org.drools.rule.builder.PatternBuilder.buildRestriction(PatternBuilder.java:625) > at > org.drools.rule.builder.PatternBuilder.createRestriction(PatternBuilder.java:434) > at > org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:308) > at > org.drools.rule.builder.PatternBuilder.buildConstraint(PatternBuilder.java:199) > at > org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:168) > at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:93) > at > org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:69) > at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:53) > at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446) > at > org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304) > at > org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167) > at > org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:28) > But if I use a "deep" str field, this issue does not exist, Everything goes well. The drl is like below: > package org.drools.examples; > > import org.drools.examples.HelloWorldExample.Message; > > rule "check deep str contains" > dialect "java" > when > m:Message( sec.fir.msg contains "Hello" ) > then > System.out.println( "===check deep str contains ok===" ); > end It seems a bug, but I am not sure. I attached my test code and the two drl files. I use below jars to compile and run this test case: > antlr-runtime-3.0.jar > core-3.2.3.v_686_R32x.jar > drools-compiler-4.0.7.jar > drools-core-4.0.7.jar > drools-decisiontables-4.0.7.jar > drools-jsr94-4.0.7.jar > janino-2.5.10.jar > jsr94-1.1.jar > mvel-1.3.12-java1.4.2.jar Can everyone kindly give me any suggestion? Thanks! - Zeke _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users