[jboss-jira] [JBoss JIRA] Created: (JBRULES-1812) Add rule inheritance to Core DRL support

[Michael Rhoden (JIRA)]

Add rule inheritance to Core DRL support
----------------------------------------

                 Key: JBRULES-1812
                 URL: https://jira.jboss.org/jira/browse/JBRULES-1812
             Project: JBoss Drools
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
    Affects Versions:  5.0.0.M2
            Reporter: Michael Rhoden
            Assignee: Mark Proctor
             Fix For: 5.0.0.M3


added "Extends" keyword to DRL grammar. When a rule extends another, it will pull the entire LHS from its parent, to the current rule before execution. An example:

rule "test rule 1"
    enabled false
    when
        c: Cheese( type == "stilton" )
    then
		list.add( new String ("rule 1") );        
end 

rule "test rule 2" extends "test rule 1"
    enabled false
    when
        Cheese( price <= 6.00) from c
    then
		list.add( new String ("rule 2") );       
end 

rule "test rule 3" extends "test rule 2"
    when
        Cheese( price > 1.00 ) from c
    then
		list.add( new String ("rule 3") );         
end 

Test is in MiscTest.java

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