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naimdjon
 Post subject: dynamic classes
PostPosted: Fri Apr 01, 2005 3:59 am 
Beginner
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Joined: Wed Feb 23, 2005 10:37 am
Posts: 29
Hi,
I have a question regarding dynamic class loading.
I have a mapping class which has a field (interface) and in database column we have saved factory implementation classname. It needs to be loaded dynamically from the fully-qualified classname stored in db:

Code:
class foo{
int id;
Runnable impl;
}


The impl classname is stored in db and the implementation is hidden. Would appreciate if anybody can give a hint on how to map the foo.hbm.xml this component.
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naimdjon
 Post subject:
PostPosted: Fri Apr 01, 2005 4:04 am 
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Joined: Wed Feb 23, 2005 10:37 am
Posts: 29
one way of doing it is as following:
Code:
class foo{
int id;
Runnable impl;
String ImplClassName;

public void setImplClassName(String implClassName){
this.ImplClassName=implClassName;
this.impl=(Runnable)Class.forName(this.ImplClassName).newInstance();
}

public String getImplClassName(){
return ImplClassName;
}


But I was wondering if there was any prettier solution for cases like this.
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