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/**
* @file XML_Schema_Resolver.h
* @author Will Otte <wotte@dre.vanderbilt.edu>
*
* Resolves schema locations.
*/
#ifndef ACE_XML_SCHEMA_RESOLVER_H
#define ACE_XML_SCHEMA_RESOLVER_H
#include /**/ "ace/pre.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "XML_Utils_Export.h"
#include "XercesString.h"
#include <xercesc/sax/EntityResolver.hpp>
#include <vector>
#include <string>
using namespace xercesc;
namespace XML
{
// forward decl.
struct NoOp_Resolver;
/**
* @class XML_Schema_Resolver
* @brief Resolves schema locations
*
* Template argument Resolver should be a functor with an operation
* const ACE_TCHAR * operator () (...arguments from resolveEntity...)
*/
template <typename Resolver = NoOp_Resolver>
class XML_Schema_Resolver
: public virtual EntityResolver
{
public:
XML_Schema_Resolver (void);
XML_Schema_Resolver (Resolver &resolver);
/// This function is called by the Xerces infrastructure to
/// actually resolve the location of a schema.
virtual InputSource * resolveEntity (const XMLCh *const publicId,
const XMLCh *const systemId);
Resolver &get_resolver (void);
private:
XML_Schema_Resolver (XML_Schema_Resolver<Resolver> &);
Resolver resolver_;
};
/**
* @class NoOp_Resolver
* @brief Resolver that does nothing.
*/
struct NoOp_Resolver
{
const XMLCh* operator() (const XMLCh *const,
const XMLCh *const systemId) const
{ return systemId; };
};
/**
* @class Basic_Resolver
* @brief Resolves a schema location from a fixed path.
*/
struct Basic_Resolver
{
Basic_Resolver (const ACE_TCHAR *path);
XMLCh* operator() (const XMLCh *const publicId,
const XMLCh *const systemId) const;
XStr path_;
};
/**
* @class Environment_Resolver
* @brief Resolves a schema location from a path from an environment variable.
*/
struct XML_Utils_Export Environment_Resolver
{
Environment_Resolver (void);
Environment_Resolver (const ACE_TCHAR *variable,
const ACE_TCHAR *path);
void add_path (const ACE_TCHAR *variable,
const ACE_TCHAR *path);
XMLCh* operator() (const XMLCh *const publicId,
const XMLCh *const systemId) const;
std::vector<XStr> paths_;
};
}
#include "XML_Schema_Resolver.tpp"
#include /**/ "ace/post.h"
#endif /* ACE_XML_SCHEMA_RESOLVER_H */
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