6:19 p.m.
Hello
in my working memory I insert an object like this
public class Foo{
private IntType prop;
...
}
where IntType is a class, but in practice prop is either of type TypeA or TypeB, both
extending the IntType class.
then i have a rule like this:
rule "abc"
when
Foo(p : prop, p.name == "propertyA")
then
// call some method defined only in the TypeA class
end
how do i explicitly cast p into a TypeA object to call the method defined only in that
class?
thanks in advance,
Alessandro Terrinoni
_________________________________________________________________
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6:26 p.m.
rule "abc"
when
Foo($prop : prop)
TypeA (this == $prop, name == "PropertyA")
then
...
2009/4/8 Alessandro Terrinoni <aleterrinoni(a)hotmail.com>
Hello
in my working memory I insert an object like this
public class Foo{
private IntType prop;
...
}
where IntType is a class, but in practice *prop* is either of type TypeA
or TypeB, both extending the IntType class.
then i have a rule like this:
rule "abc"
when
Foo(p : prop, p.name == "propertyA")
then
// call some method defined only in the TypeA class
end
how do i explicitly cast p into a TypeA object to call the method defined
only in that class?
thanks in advance,
Alessandro Terrinoni
------------------------------
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1:20 p.m.
This way my rule doesn't match
At the moment i only provide Foo objects as facts. Do i have to provide also the field
prop objects as facts for the rule to match?
Date: Wed, 8 Apr 2009 12:26:01 -0400
Subject: Re: [rules-users] Explicit class cast in RHS
From: dsinclair(a)chariotsolutions.com
To: rules-users(a)lists.jboss.org
rule "abc"
when
Foo($prop : prop)
TypeA (this == $prop, name == "PropertyA")
then
...
2009/4/8 Alessandro Terrinoni <aleterrinoni(a)hotmail.com>
Hello
in my working memory I insert an object like this
public class Foo{
private IntType prop;
...
}
where IntType is a class, but in practice prop is either of type TypeA or TypeB, both
extending the IntType class.
then i have a rule like this:
rule "abc"
when
Foo(p : prop, p.name == "propertyA")
then
// call some method defined only in the TypeA class
end
how do i explicitly cast p into a TypeA object to call the method defined only in that
class?
thanks in advance,
Alessandro Terrinoni
Scegli fra più di 30 stazioni! Ascolta la radio su Messenger
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rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
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3:28 p.m.
You could do one of two things. Insert the property into working memory, or
use the from statement in the rule.
$foo : Foo()
TypeA(name == "PropertyA") from $foo.prop
2009/4/9 Alessandro Terrinoni <aleterrinoni(a)hotmail.com>
This way my rule doesn't match
At the moment i only provide Foo objects as facts. Do i have to provide
also the field prop objects as facts for the rule to match?
------------------------------
Date: Wed, 8 Apr 2009 12:26:01 -0400
Subject: Re: [rules-users] Explicit class cast in RHS
From: dsinclair(a)chariotsolutions.com
To: rules-users(a)lists.jboss.org
rule "abc"
when
Foo($prop : prop)
TypeA (this == $prop, name == "PropertyA")
then
...
2009/4/8 Alessandro Terrinoni <aleterrinoni(a)hotmail.com>
Hello
in my working memory I insert an object like this
public class Foo{
private IntType prop;
...
}
where IntType is a class, but in practice *prop* is either of type TypeA
or TypeB, both extending the IntType class.
then i have a rule like this:
rule "abc"
when
Foo(p : prop, p.name == "propertyA")
then
// call some method defined only in the TypeA class
end
how do i explicitly cast p into a TypeA object to call the method defined
only in that class?
thanks in advance,
Alessandro Terrinoni
------------------------------
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6:59 p.m.
The RHS of rules contain semantic code based on the dialect you are
using. In your example, java. So, just cast it:
( (TypeA) p ).methodFromTypeA();
[]s
Edson
2009/4/8 Alessandro Terrinoni <aleterrinoni(a)hotmail.com>
Hello
in my working memory I insert an object like this
public class Foo{
private IntType prop;
...
}
where IntType is a class, but in practice *prop* is either of type TypeA
or TypeB, both extending the IntType class.
then i have a rule like this:
rule "abc"
when
Foo(p : prop, p.name == "propertyA")
then
// call some method defined only in the TypeA class
end
how do i explicitly cast p into a TypeA object to call the method defined
only in that class?
thanks in advance,
Alessandro Terrinoni
------------------------------
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--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
5489
days inactive
5490
days old
7 comments
4 participants
participants (4)
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Alessandro Terrinoni -
David Sinclair -
Edson Tirelli -
nik_sharma75＠hotmail.com