Java activation framework problem

Question

Hi there,
I'm almost running mad. Here's the story, I have implemented a Textviewer.class to test if i can write a bean to be used as a plugin.
I want an application to be able to lookup the class using the mailcap Commandmap implementation. My TextViewer class implements the Commandobject interface, and when I lookup the CommandClass associated with the current Datahandler it shows:
TextViewer
my mailcap looks like this:
text/plain;; x-java-view=TextViewer
But when I want to instantiate the bean using:
dh[index].getBean(ci);
it doesnot instantiate the bean but it returns null.
Am I leaving something out, should the bean be in a Jar file, in a Package? The bean is in the current package and in the current directory, and the directory is included in the CLASSPATH.
If I try to retrieve the bean using the getCommandObject method in CommandInfo class like this:
try {
Object my_secbean = cmds[verb_choice.getSelectedIndex()].getCommandObject(dh[index],cmds[verb_choice.getSelectedIndex()].getClass().getClassLoader());
} catch (IOException e) {             
System.err.println("Message: " + e.getMessage());
System.exit(-1);
} catch (ClassNotFoundException e) {
System.err.println("Class not found");
System.err.println("Message: " + e.getMessage());
System.exit(-1);
it prints the following statement:
Class not found
Message: TextViewer
So it seems the classloader is unable to find the class, the class resides in the directory where the application is started and the current directory "." is in the CLASSPATH variable.
But where does the classloader look for the class?
cheeerrrrs jan

Answer 1

Hi there,
I'm almost running mad. Here's the story, I have implemented a Textviewer.class to test if i can write a bean to be used as a plugin.
I want an application to be able to lookup the class using the mailcap Commandmap implementation. My TextViewer class implements the Commandobject interface, and when I lookup the CommandClass associated with the current Datahandler it shows:
TextViewer
my mailcap looks like this:
text/plain;; x-java-view=TextViewer
But when I want to instantiate the bean using:
dh[index].getBean(ci);
it doesnot instantiate the bean but it returns null.
Am I leaving something out, should the bean be in a Jar file, in a Package? The bean is in the current package and in the current directory, and the directory is included in the CLASSPATH.
If I try to retrieve the bean using the getCommandObject method in CommandInfo class like this:
try {
Object my_secbean = cmds[verb_choice.getSelectedIndex()].getCommandObject(dh[index],cmds[verb_choice.getSelectedIndex()].getClass().getClassLoader());
} catch (IOException e) {             
System.err.println("Message: " + e.getMessage());
System.exit(-1);
} catch (ClassNotFoundException e) {
System.err.println("Class not found");
System.err.println("Message: " + e.getMessage());
System.exit(-1);
it prints the following statement:
Class not found
Message: TextViewer
So it seems the classloader is unable to find the class, the class resides in the directory where the application is started and the current directory "." is in the CLASSPATH variable.
But where does the classloader look for the class?
cheeerrrrs jan