php-java-bridge-users Mailing List for PHP/Java Bridge

php...@li... wrote:
> Hi,
>
> this sounds like a bug to me.
>
> Presumably java_instanceof() has never been tested with the DynamicClassLoader. Please see
> ticket#1824173
> (=>http://sourceforge.net/tracker/index.php?func=detail&aid=1824173&group_id=117793&atid=679233)
> for details.
>
> I haven't received your attachment, but I think we are able to reproduce this problem.
>
>
> Regards,
> Jost Boekemeier
>
>
>
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> php...@li...
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>   
Ok, I will monitor bug #1824173 then.

In the meantime, here's the small patch I wrote:

--- DynamicJavaBridgeClassLoader.java   2007-09-26 09:51:30.000000000 +0200
+++ 
php-java-bridge-4.1.8/server/php/java/bridge/DynamicJavaBridgeClassLoader.java  
2007-09-26 09:52:26.000000000 +0200
@@ -36,7 +36,6 @@
 import java.util.Set;
 import java.util.jar.JarFile;
 import java.util.jar.Manifest;
-
 /**
  * The bridge class loader which uses the DynamicClassLoader when 
possible.
  * @author jostb
@@ -217,12 +216,14 @@
                    if (c != null)
                    return (Class) c;
                    try {
-                   result = doLoadClass(name);
+                   result = findLoadedClass(name);
+                   if (result == null)
+                       result = doLoadClass(name);
                    cache.put(name, result);
                    return result;
                    } catch (ClassNotFoundException cnfe) {
                    cache.put(name, nf);
-                   }
+                   } 
                                }
                throw new ClassNotFoundException(name);
                }
~                 

Thanks a lot,
P-a Bäckström

Hi,

this sounds like a bug to me.

Presumably java_instanceof() has never been tested with the DynamicClassLoader. Please see
ticket#1824173
(=>http://sourceforge.net/tracker/index.php?func=detail&aid=1824173&group_id=117793&atid=679233)
for details.

I haven't received your attachment, but I think we are able to reproduce this problem.


Regards,
Jost Boekemeier



        __________________________________  Ihr erstes Baby? Holen Sie sich Tipps von anderen Eltern.  www.yahoo.de/clever

Hi there!

Running (the otherwise excellent) php-java-bridge-4.1.8 I encountered a bug=
.

I had the following java-class structure

Class A
Class B extends A

>From php I referenced a remote EJB and called a method with the
following signature:

public A getA();

Where the method in fact returns an instance of  class B.

In php I then tried to figure out whether it was an instance of Class
A or B by using
java_instance_of:

$obj =3D $bean->getA();
$clazz =3D new JavaClass("org.test.B");
if ($clazz instanceof Java && java_instanceof($address, $clazz)){
  //...
} else {
 //...
}

However, this raised a LinkageException on the JVM, claiming that
Class B  already was loaded by the classloader.
If "$clazz =3D new JavaClass("org.test.B");" was performed before
"$bean->getA();" everything worked out fine, so I figured that
something was buggy in the dynamic classloading scheme.

I've attached a patch to the DynamicJavaBridgeClassLoader which
addresses this, by checking findLoadedClass(name) before
doLoadClass(name) but after verifying that it isn't in the cache.

/Sincerely
P-a B=E4ckstr=F6m
Sweden