Re: Inner Class and Digester

[robert burrell donkin]

hi Bahram

digester uses reflection to create instances. i strongly suspect that 
inner classes must have enclosing instances and therefore they cannot be 
created by reflection.

i would suggest that you use an ObjectCreationFactory or a custom rule.

- robert

On Friday, September 19, 2003, at 09:08 PM, Enshayan, Bahram wrote:

I want to use the Digester package to parse an xml file and create an
instance of a class.  The class has an inner class and I want to
instantiate this inner class from digester, but I run in to some
problems.
Does anybody know of a way to use the Digester package to instantiate
an inner class?  I cannot make the class static-inner class and I
cannot make it a seperate class.
Details of my situation:

- java code
public ClassA {
    String name;
    public ClassA() {
    }
    public void setName(String name) {
        this.name = name;
    }
    public class ClassB {
        String name;
        public ClassB() {
        }
        public void setName(String name) {
            this.name = name;
        }
    }
}
- Here are the Digester rules:
addObjectCreate("classa", "ClassA");
addCallMethod("classa/name", "setName", 0);
addObjectCreate("classa/classb", "ClassB");
addCallMethod("classa/classb/name", "setName", 0);
- Here is the xml:
<classa>
   <name>somename</name>
   <classb>
      <name>someothername</name>
   </classb>
</classa>
I get classNotFoundExcepton if have the above setup. If I change the
second last line in the Digester rules to:
addObjectCreate("classa/classb", "ClassA$ClassB");
then I get InstantiationException.
Does anyone know why I am getting these errors?

Thanks!

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