[rules-users] java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message
Hi All, Can anybody tell me what is the problem here .. i have a 2 classes: person(i have a field in this :java.lang.String add) Message(i have a filed in this :java.lang.String name) rule H when person( $a : add ) Message ( name == tree ) from $a then # System.out.println(in H rule); when i compile this rule i am getting below exception... java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message Thanks in Advance Veeras -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-ClassCastException-java-lang-String-cannot-be-cast-to-com-sample-DroolsTest-Message-tp3671568p3671568.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message
Try this.. $p : person( ) Message( name == tree ) from $p.add -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Veera Sent: Thursday, January 19, 2012 11:57 AM To: rules-users@lists.jboss.org Subject: [rules-users] java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message Hi All, Can anybody tell me what is the problem here .. i have a 2 classes: person(i have a field in this :java.lang.String add) Message(i have a filed in this :java.lang.String name) rule H when person( $a : add ) Message ( name == tree ) from $a then # System.out.println(in H rule); when i compile this rule i am getting below exception... java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message Thanks in Advance Veeras -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-ClassCastException-java-lang-String-cannot-be-cast-to-com-sample-DroolsTest-Message-tp3671568p3671568.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users CAUTION - Disclaimer * This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS End of Disclaimer INFOSYS*** ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message
You cannot cast an object of type java.lang.String (i.e. $a as it is bound to add) to Message. Apparently you have not understood how from works. (Its various forms are described in the Expert manual.) Most frequently, it is used to pull one or more objects, one at a time, from a fact, in order to permit them to match a pattern although they have not been inserted in Working Memory. What I see in this rule doesn't indicate what you might have intended to do - so I cannot propose an improved version. -W On 19/01/2012, Veera veera...@gmail.com wrote: Hi All, Can anybody tell me what is the problem here .. i have a 2 classes: person(i have a field in this :java.lang.String add) Message(i have a filed in this :java.lang.String name) rule H when person( $a : add ) Message ( name == tree ) from $a then # System.out.println(in H rule); when i compile this rule i am getting below exception... java.lang.ClassCastException: java.lang.String cannot be cast to com.sample.DroolsTest$Message Thanks in Advance Veeras -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-ClassCastException-java-lang-String-cannot-be-cast-to-com-sample-DroolsTest-Message-tp3671568p3671568.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
