[rules-users] Can we works on fact of "dynamic Map" instead of POJO?

[王在祥]

Thanks, I have resolved the problem with some modified to the Drools source,
maybe you can take a loot at my blog: wangzaixiang.blogspot.com, (In
chinese, but i post some source code)

On Sat, Mar 27, 2010 at 8:23 AM, Peter Butler <peter.butler at 141.com> wrote:

> Hi Wang
>
> I've done something similar with questions in an insurance application.
> I found it easiest to split the map entries up into separate objects and
> put them all into working memory:
>
> class Answer {
> String questionCode;
> String answer;
> AnswerSet answerSet;
> // ...getters and setters omitted
> }
>
> class AnswerSet {
> String answerSetCode;
> List<Answer> answers;
> }
>
> The rule looks something like:
>
> when
> set1 : AnswerSet(code == 'answerSet1')
> answer1 : Answer(questionCode == 'question1', answer == "100", answerSet
> == set1)
> answer2 : Answer(questionCode == 'question2', answer == '200', answerSet
> == set1)
> then
> answer1.hidden = true
>
> These are also easy to convert into a DSL. The "answerSet" in the rule
> is used to make sure both answers have come from the same set of answers
> (if that's important to you).
>
> I did read somewhere in the docs that MVEL can handle maps in the same
> way as beans, but I'm not sure if this is correct.
>
> Cheers
>
> Peter
>
> 王在祥 wrote:
> > I have a requirement of run rules on dynamic map instead of POJO, for
> > example:
> >
> > *when
> > Map(* TransCode == "LOGIN" , userName == "wangzx", password == "123456" )
> > *then
> > doSth1()
> >
> > when
> > Map( *TransCode = "SaveOrder" userName == "wangzx" category == "Book")
> > *then
> > doSth2()
> >
> > *
> > the Fact is not a Java Bean, but a dynamic map<String, Object>, so the
> > TransCode == "Login" is what we means map("TransCode") == "Login".
> >
> > By using map insteam of POJO, we can build a rules run on the message
> > dispatch, since there is a lot of Message Types, and each message type
> > has different schema, so using dynamic types is more flexible than POJO.
> >
> > Can someone tell me how can it be supported in drools? Very thanks.
> > ------------------------------------------------------------------------
> >
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>
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