src/util/XMLNetAccessor.hpp

/*
 * The Apache Software License, Version 1.1
 * 
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 * 
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 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 * 
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many
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 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
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/**
 * $Log$
 * Revision 1.1  1999/11/09 01:05:50  twl
 * Initial revision
 *
 * Revision 1.2  1999/11/08 20:45:20  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */

#if !defined(XMLNETACCESSOR_HPP)
#define XMLNETACCESSOR_HPP

#include <util/XML4CDefs.hpp>

class BinInputStream;


//
//  This class is an abstract interface via which the URL class accesses
//  net access services. When any source URL is not in effect a local file
//  path, then the URL class is used to look at it. Then the URL class can
//  be asked to make a binary input stream via which the referenced resource
//  can be read in.
//
//  The URL class will use an object derived from this class to create a
//  binary stream for the URL to return. The object it uses is provided by
//  the platform utils, and is actually provided by the per-platform init
//  code so each platform can decide what actual implementation it wants to
//  use.
//
class XMLUTIL_EXPORT XMLNetAccessor
{
public :
    // -----------------------------------------------------------------------
    //  Virtual destructor
    // -----------------------------------------------------------------------
    virtual ~XMLNetAccessor()
    {
    }


    // -----------------------------------------------------------------------
    //  The virtual net accessor interface
    // -----------------------------------------------------------------------
    virtual BinInputStream* makeNew
    (
        const   XMLCh* const            urlSource
        ,       XML4CExcepts::Codes&    failReason
    ) = 0;


protected :
    // -----------------------------------------------------------------------
    //  Hidden constructors
    // -----------------------------------------------------------------------
    XMLNetAccessor()
    {
    }


private :
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    XMLNetAccessor(const XMLNetAccessor&);
    void operator=(const XMLNetAccessor&);
};

#endif