Objetos populados dinamicamente

public void popula(Object ob, String nameField, Object value){
  try{
    String methodName = "set"+ nameField.substring(0,1).toUpperCase() + nameField.substring(1);
     Method setterMethod = ob.getClass().getDeclaredMethod(methodName, new Class[]{value.getClass()});
     setterMethod.invoke(ob, new Object[]{value});
  }catch(Exception e){}
}

public abstract class PropertyContainerImpl
implements PropertyContainer, Serializable
{
protected Hashtable ivProperties = new Hashtable(2);
public PropertyContainerImpl() {
}
/**
* Add a property associated with a token name.
* If the token already exists, the value will be replaced.
* If the token does not exist, it will be added with the value.
* @param value is an object that cannot be null
* @param token is a key that can be used to retrieve the value
*/
public void addPropertyBy(Object value, String token) {
if(value==null || token==null) return;
if(ivProperties.containsKey(token)){
ivProperties.remove(token);
}
ivProperties.put(token, value);
}
/**
* Retrieve a value by a particular token.
* @param token is a key that can be used to retrieve the value
* @return Object is the value associated with the token. It
* will not be null.
*/
public Object getPropertyBy(String token) {
if(token==null) return null;
return ivProperties.get(token);
}
/**
* Retrieve all property keys currently in use.
* @return String[] is an array of all valid token names.
*/
public String[] getPropertyKeys() {
String keys[] = null;
synchronized(ivProperties){
int s = ivProperties.size();
keys = new String[s];
Enumeration e = ivProperties.keys();
int i = 0;
while(e.hasMoreElements()){
keys[i] = (String)e.nextElement();
i++;
}
}
return keys;
}
/**
* Remove a value associated with a particular token.
* @param token is a key associated with a value that was added
*/
public void removeProperty(String token) {
if(token==null) return;
ivProperties.remove(token);
}
}