public ObjectValue(String prop) 
{
       
        super(prop);
}

 public Object get() 
{
        return _value;
}

The internal value.

 protected String getInternalString() 
{
        return null;
}

 public Class getValueType() 
{
        return Object.class;
}

 public Object instantiate(Class type,
    Configuration conf) 
{
        return instantiate(type, conf, true);
}

Instantiate the object as an instance of the given class. Equivalent to instantiate(type, conf, true).

 public Object instantiate(Class type,
    Configuration conf,
    boolean fatal) 
{
        throw new UnsupportedOperationException();
}

Instantiate the object as an instance of the given class.

 public Object newInstance(String clsName,
    Class type,
    Configuration conf,
    boolean fatal) 
{
        ClassLoader cl = (ClassLoader) _classloaderCache.get(type);
        if (cl == null) {
            cl = (ClassLoader) AccessController.doPrivileged(
                J2DoPrivHelper.getClassLoaderAction(type));
            if (cl == null) {  // System classloader is returned as null
                cl = (ClassLoader) AccessController.doPrivileged(
                    J2DoPrivHelper.getSystemClassLoaderAction()); 
            }
            _classloaderCache.put(type, cl);
        }
        return Configurations.newInstance(clsName, this, conf, cl, fatal);
}

Allow subclasses to instantiate additional plugins. This method does not perform configuration.

 protected  void objectChanged() 
{

}

Implement this method to synchronize internal data with the new object value.

 public  void set(Object obj) 
{
        set(obj, false);
}

The internal value.

 public  void set(Object obj,
    boolean derived) 
{
        if (!derived) assertChangeable();
        Object oldValue = _value;
        _value = obj;
        if (!derived && !ObjectUtils.equals(obj, oldValue)) {
            objectChanged();
            valueChanged();
        }
}

The internal value.

 protected  void setInternalObject(Object obj) 
{
        set(obj);
}

 protected  void setInternalString(String str) 
{
        if (str == null)
            set(null);
        else
            throw new IllegalArgumentException(_loc.get("cant-set-string",
                getProperty()).getMessage());
}