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// -*- C++ -*-
//=============================================================================
/**
* @file Validator.h
*
* $Id: Validator.h 91257 2010-08-03 11:54:04Z johnnyw $
*
* @author Nanbor Wang <nanbor@cs.wustl.edu>
*/
//=============================================================================
#ifndef _ACEXML_VALIDATOR_H_
#define _ACEXML_VALIDATOR_H_
#include /**/ "ace/pre.h"
#include "ACEXML/common/ACEXML_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ACEXML/common/Attributes.h"
#include "ACEXML/common/SAXExceptions.h"
/**
* @class ACEXML_Validator Validator.h "common/Validator.h"
*
* @brief An abstract virtual class defining validator interface.
*
* An validator provides validation service for one XML element.
* ACEXML_Validators are stateful object. Implementations should
* remember the current element encountered and determine if
* it's a valid sequence of child elements. A parser fishes
* out a validator of certain
*/
class ACEXML_Export ACEXML_Validator
{
public:
virtual ~ACEXML_Validator () = 0;
/**
* Validate attributes of an element.
*
* @retval 0 if valid, -1 otherwise.
*/
virtual int startElement (ACEXML_Attributes *atts) = 0;
/**
* Validate the next child element.
*
* @retval 0 if valid, -1 otherwise.
*/
virtual int nextElement (const ACEXML_Char *namespaceURI,
const ACEXML_Char *localName,
const ACEXML_Char *qName) = 0;
};
#include /**/ "ace/post.h"
#endif /* _ACEXML_VALIDATOR_H_ */
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