/**
* Removes an attribute from this resource class.
*
* @param attr an attribute.
* @throws EntityDoesNotExistException if the class does not declare the attribute.
*/
public void deleteAttribute(Attribute attr) throws EntityDoesNotExistException {
if (!attributes.containsKey(attr.getName())) {
throw new EntityDoesNotExistException(
"class " + getName() + " does not declare attribute " + "named " + attr.getName());
}
attributes.remove(attr.getName());
attr.setDeclaringClass(null);
}
/**
* Adds an attribute to this resource class.
*
* @param attr an attribute.
* @throws EntityExistsException if the class already delcares an attribute by that name.
*/
public void addAttribute(Attribute attr) throws EntityExistsException {
if (attributes.containsKey(attr.getName())) {
throw new EntityExistsException(
"class " + getName() + " already declares attribute named " + attr.getName());
}
if (getAllAttributes().contains(attr)) {
throw new EntityExistsException(
"class " + getName() + " already inherits attribute named " + attr.getName());
}
attributes.put(attr.getName(), attr);
attr.setDeclaringClass(this);
}
