CONDITION
$a : ActionObject

$param != null

this

this

Add an additional CONDITION for ActionObject.

You'll need to probably add a constraint for "this != null" and put an X in the rows; e.g.

CONDITION
$a : ActionObject

this != null

X

X

On 22 May 2013 09:55, Ramon Buckland <ramon@thebuckland.com> wrote:

Hi. 

I am working on Drools 5.5.0.Final and have a question regarding XLS and a Decision Table structure,

I have a ConditionObject and an ActionObject and wanted to know or see an example for XLS that produces a "does exist" for the ActionObject

in the when.

I can simply write the rule in a DRL, but translating how to make the XLS compiler create the same is proving challenging.

An example:

I want to produce a set of rules like below

rule "Test rule_11"

when

    $c : ConditionObject( somefield )

    EmbeddedObject(myField == AnEnum.SomeValue) from $c.embedded

    $a : ActionObject( )

then 

    $a.someMethod("value")

    $a.someMethod2(10)

    $a.someMethod3("A")

end

rule "Test rule_12"

// some other AnEnum checks.

What I can't work out is how I get the test of "existence" of the Action Object into the "when" for the rule, so that I can "use" the Object in the ACTION.

In addition, is there a away that I can avoid needing a whole column just for "existence of an object with a field.. collect as a variable $c : (ConditionObject( somefield )" ?

CONDITION CONDITION ACTION ACTION ACTION

$c : ConditionObject EmbeddedObject() from $c.embedded

$param myField == AnEnum.$param $a.someMethod("$param") $a.someMethod2($param) $a.someMethod3($param)

"Description" "Description" "Description" "Description" "Description"

somefield SomeValue value 10 A

somefield SomeOtherValue someOtherValue 50 B

This is the XLS of the above.

https://www.dropbox.com/s/lw3zb5hwtjdbpcm/sample_rules.xls?v=1scns

When this sheet is compiled, I get the following: How do I setup a "condition" for ActionObject to get in the when ?

package packageName;

//generated from Decision Table

// rule values at A8, header at A3

rule "Test rule_8"

when

$c : ConditionObject(somefield)

EmbeddedObject(myField == AnEnum.SomeValue) from $c.embedded

then

$a.someMethod("value")

$a.someMethod2(10)

$a.someMethod3(A)

end

// rule values at A9, header at A3

rule "Test rule_9"

when

$c : ConditionObject(somefield)

EmbeddedObject(myField == AnEnum.SomeOtherValue) from $c.embedded

then

$a.someMethod("someOtherValue")

$a.someMethod2(50)

$a.someMethod3(B)

end

Ramon Buckland

ramon@thebuckland.com

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