3:31 p.m.
Hello,
I got some problems with shadowproxy.
I have a couple of instances of class "FirstObj". The objects contains
some other objects like "innerObj" and have a method
"computesomething",
which returns boolean and use the "innerObj" to compute the result.
I try to access this object with the following rule:
rule "doIt"
when
$firstobj : FirstObj(computesomething == true)
then
// take a break...
System.out.println("be happy");
I debug the programm and figure out that the innerObj is not null.
Instead of my original object "firstobj", there I found a
FirstObjShadowProxy which offers a field called "innerObj" which is null.
Isnt it possible to get access to "computed" fields? What is wrong here?
Thanks
Thorsten
4:55 p.m.
Assuming your "computesomething" method has a signature like:
public boolean computesomething() { .. }
The shadow proxy will delegate the call to your instance method. So, does
not matter if the shadow proxy innerObj is null (since being a lazy proxy it
may not have been loaded yet) because the shadow proxy will actually execute
your instance computesomething() method.
Stack trace?
[]s
Edson
2008/12/9 Trägenap <traegenap(a)ttc-informatik.de>
Hello,
I got some problems with shadowproxy.
I have a couple of instances of class "FirstObj". The objects contains some
other objects like "innerObj" and have a method "computesomething",
which
returns boolean and use the "innerObj" to compute the result.
I try to access this object with the following rule:
rule "doIt"
when
$firstobj : FirstObj(computesomething == true)
then
// take a break...
System.out.println("be happy");
I debug the programm and figure out that the innerObj is not null. Instead
of my original object "firstobj", there I found a FirstObjShadowProxy which
offers a field called "innerObj" which is null.
Isnt it possible to get access to "computed" fields? What is wrong here?
Thanks
Thorsten
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Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
12:48 p.m.
Hello,
could you send the code of FirstObj ?
I had some problem once with final fields / method because the shadowProxy is in fact a
subclass of your class so it can't proxy final things...
-Patrick
-----Message d'origine-----
De : rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org]De la part de Trägenap
Envoyé : mardi, 9. décembre 2008 15:32
À : rules-users(a)lists.jboss.org
Objet : [rules-users] shadow proxy nullpointerexception
Hello,
I got some problems with shadowproxy.
I have a couple of instances of class "FirstObj". The objects contains
some other objects like "innerObj" and have a method
"computesomething",
which returns boolean and use the "innerObj" to compute the result.
I try to access this object with the following rule:
rule "doIt"
when
$firstobj : FirstObj(computesomething == true)
then
// take a break...
System.out.println("be happy");
I debug the programm and figure out that the innerObj is not null.
Instead of my original object "firstobj", there I found a
FirstObjShadowProxy which offers a field called "innerObj" which is null.
Isnt it possible to get access to "computed" fields? What is wrong here?
Thanks
Thorsten
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2 comments
3 participants
participants (3)
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Edson Tirelli -
Gras, Patrick -
Trägenap