src/validators/DTD/CMBinaryOp.hpp

/*
 * The Apache Software License, Version 1.1
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 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
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 * 1. Redistributions of source code must retain the above copyright
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 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * This software consists of voluntary contributions made by many
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/**
 * $Log$
 * Revision 1.1  1999/11/09 01:03:02  twl
 * Initial revision
 *
 * Revision 1.2  1999/11/08 20:45:35  rahul
 * Swat for adding in Product name and CVS comment log variable.
 *
 */

#if !defined(CMBINARYOP_HPP)
#define CMBINARYOP_HPP

#include <util/XML4CDefs.hpp>
#include <validators/DTD/CMNode.hpp>

class CMStateSet;

class CMBinaryOp : public CMNode
{
public :
    // -----------------------------------------------------------------------
    //  Constructors
    // -----------------------------------------------------------------------
    CMBinaryOp
    (
        const   ContentSpecNode::NodeTypes  type
        ,       CMNode* const               leftToAdopt
        ,       CMNode* const               rightToAdopt
    );
    ~CMBinaryOp();


    // -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------
    const CMNode* getLeft() const;
    CMNode* getLeft();
    const CMNode* getRight() const;
    CMNode* getRight();


    // -----------------------------------------------------------------------
    //  Implementation of the public CMNode virtual interface
    // -----------------------------------------------------------------------
    bool isNullable() const;


protected :
    // -----------------------------------------------------------------------
    //  Implementation of the protected CMNode virtual interface
    // -----------------------------------------------------------------------
    void calcFirstPos(CMStateSet& toSet) const;
    void calcLastPos(CMStateSet& toSet) const;


private :
    // -----------------------------------------------------------------------
    //  Private data members
    //
    //  fLeftChild
    //  fRightChild
    //      These are the references to the two nodes that are on either side
    //      of this binary operation. We own them both.
    // -----------------------------------------------------------------------
    CMNode* fLeftChild;
    CMNode* fRightChild;
};

#endif