[rules-users] dsl error- please help

[Fnu Mahalakshmi]

Hi guys,

I am trying to create a very basic dsl which is giving me the following error stack:

The code to add the dsl is as follows:

InputStream ruleSource = RuleRunner.class.getClassLoader().getResourceAsStream("/Rule1.dslr");
InputStream dslSource = RuleRunner.class.getClassLoader().getResourceAsStream("/sample-dsl.dsl");

            //Load the rules , using DSL
            addRulesToThisPackage.addPackageFromDrl(
                        new InputStreamReader(ruleSource),
                        new InputStreamReader(dslSource));

I have both the sample-dsl .dsl and Rule1.dslr in my working directory.

Error encountered at adding the dsl to the package (last line)

Error stack:
Exception in thread "main" java.lang.NullPointerException
      at java.io.Reader.<init>(Unknown Source)
      at java.io.InputStreamReader.<init>(Unknown Source)
      at com.org.RuleRunner.loadRuleFile(RuleRunner.java:96)
      at com.org.RuleRunner.loadRules(RuleRunner.java:48)
      at com.org.RuleRunner.runStatelessRules(RuleRunner.java:109)
      at com.org.RulesTest.main(RulesTest.java:41)

my dsl file has basic mapping as per the online documentations.

The dsl rule I created is:
expander sample-dsl.dsl

rule "A status changes B status"
      when
            There is an A
-        has an address
There is a B
      - has name
      then
            - print updated A and Aaddress
End


I have created DSL in eclipse.

Is the code I added for it to be loaded to my package correct?? Or am I missing something????


Please help.

Thanks.
M

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