If someone else is also permitted to contribute a few pointers:
- You just mit the generic type parameter in DRL and all the files
compiled into it, including decision tables.
- Storing the List tasks as a global variable could be helpful, but I
don't see any reason for it when your rules should determine something
about the individual list elements. Data stored in a global variable is not
triggering any rules.
- If your rules should discover certain Task objects, then these objects
should be inserted as facts.
HTH
-W
On 17 November 2011 22:55, Adrigan <lillian.andres(a)lmco.com> wrote:
Hello Edson,
If the generic *<T>* is not allowed, and drools appears to be
written to
operate over collections of objects, how do you insert a List of items like
this:
*List<ProjectDataSet.Task> tasks*? In my code I insert the tasks as facts
like this:
*commands.add(CommandFactory.newInsertElements(tasks));*
I use a decision table and have as one of the variables: (in the variable
row)
*List<ProjectDataSet.Task> tasks*.
The error I receive is this:
/org.drools.template.parser.DecisionTableParseException: The format for
global variables is incorrect. It should be: [Class name, Class otherName].
But it was: [List<ProjectDataSet.Task> tasks]
at
org.drools.decisiontable.parser.RuleSheetParserUtil.getVariableList(RuleSheetParserUtil.java:84)/
I desire the rules in the table to iterate through all the tasks in
that
list and identify tasks that are due soon (a part of my condition column
*TASKACTSTART< today* … etc. The TASKACTSTART is a field named by
Microsoft
in the ProjectDataSet.Task class.)
Have I misunderstood the power of drools? How do you address a
collection
of a type like List<T> in a rule?
Thank you in advance for your help,
Adrigan
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