I'm far from an expert in the area of ClassLoaders, but it seems to me the only solution is to load your tasks with the same loaderRef that is used by the parent, if you can make no changes to the parent.
-----Original Message----- From: Venkatesh Sangam [mailto:vsan...@gmail.com] Sent: Wednesday, November 03, 2010 11:44 AM To: user@ant.apache.org Subject: Re: antlib classloader issue I have the following case that is resulting in classcastexception. Any suggestion to fix this is really appreciated. 1. I have an ant build file parent.xml that has an antlib entry and also has usage for the custom tasks defined in the antlib as follows: <taskdef resource="myco/anttasks/antlib.xml" uri="antlib:myco.anttasks" loaderRef="myco.custom.tasks.loader"> <classpath refid="custom.tasks.class.path"/> </taskdef> <custom:myCustomTypeDef id="my.task" xmlns:custom="antlib:myco.anttasks"> </custom:myCustomTypeDef> The implementation details of myCustomTypeDef are in myco/anttasks/antlib.xml 2. I have another ant build file child.xml that imports parent.xml and defines its own custom tasks. These new custom tasks are an extension to the tasks already defined in the parent.xml, which means that I need the class path reference defined in "custom.tasks.class.path" 3. When I execute the new task in child.xml, I get a classcastexception when referring to myCustomTypeDef. My code does not directly refer to myCustomTypeDef, but the parent code that I am extending references myCustomTypeDef. 4. The classes in the myco/anttasks/antlib.xml are loaded by a different classloader than the taskdef in my child.xml and hence I cannot see that class. How do I resolve this issue? I cannot directly modify parent.xml. Only child.xml is in my control. How do I make sure that the taskdef in child.xml are loaded by the same classloader loading the implementation defined in parent antlib.xml Thanks, Venkatesh --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@ant.apache.org For additional commands, e-mail: user-h...@ant.apache.org
