If I wanted to compare two knowledge packages to find out if they are the "same" how would I do so? More specifically if I deserialize the same knowledge package twice how can I compare the two in a way that will return true signifying they are the same? Using the equals method will not work since that simply does identity comparisons. This is causing big problems for me right now because hibernate always thinks packages are dirty and is constantly updating them to the database when they do not need to be. Any suggestions are much appreciated as this has become an urgent issue. Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/Comparing-KnowledgePackages-for-Equalit... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thanks for the suggestion Wolfgang. The problem is that hibernate does serialize the packages to compare the bytes and they are still somehow different. I also felt like I did a test before where I read a serialized package from the database, serialized it again, and the bytes were different from the original. I will test this again to be sure. Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/Comparing-KnowledgePackages-for-Equalit... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I am using Drools 5.3.1.Final in case that is useful information. Thanks Esteban for the suggestion but I could not get that to work. I must be doing something wrong. Here is what I am trying to do in a nutshell. I read in several standard rules and guided rules, add them all to a KnowledgeBuilder, and then get the resulting KnowledgePackage from the KnowledgeBuilder. I then save this KnowledgePackage to a database using Hibernate. My problem is now every time I read the package from the database Hibernate thinks the object is dirty and updates the rule package. A byte comparison of two packages does not work because you are not guaranteed everything in the package will be serialized in the same order, as I found. To test this I deserialized two packages from the same byte stream, serialized them, and all resulting byte arrays were different. When I tried Esteban's idea I read the KnowledgePackage from the database but all the rules in the package do not have a consequence until I add the package to a KnowledgeBase. This means that I cannot use a BinaryResourceDiffProducerImpl because that compares rule consequences and throws a NullPointerException in my case. Any other ideas on how I can successfully compare two KnowledgePackages that represent the same set of rules or even another suggestion altogether to get KnowledgePackages to play nicely with Hibernate? -- View this message in context: http://drools.46999.n3.nabble.com/Comparing-KnowledgePackages-for-Equalit... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users