/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::functionEntries::inputModeEntry

Description
    Specify the input mode when reading dictionaries, expects
    a single word to follow.

    An example of \c \#inputMode directive:
    \verbatim
        #inputMode merge
    \endverbatim

    The possible input modes:
    \param merge      merge sub-dictionaries when possible
    \param overwrite  keep last entry and silently remove previous ones
    \param protect    keep initial entry and silently ignore subsequent ones
    \param warn       keep initial entry and warn about subsequent ones
    \param error      issue a FatalError for duplicate entries
    \param default    currently identical to merge

SourceFiles
    inputModeEntry.C

\*---------------------------------------------------------------------------*/

#ifndef inputModeEntry_H
#define inputModeEntry_H

#include "functionEntry.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace functionEntries
{

/*---------------------------------------------------------------------------*\
                        Class inputModeEntry Declaration
\*---------------------------------------------------------------------------*/

class inputModeEntry
:
    public functionEntry
{
        //- The input mode options
        enum inputMode
        {
            MERGE,
            OVERWRITE,
            PROTECT,
            WARN,
            ERROR
        };

        //- The current input mode
        static inputMode mode_;


    // Private Member Functions

        //- Read the mode as a word and set enum appropriately
        static void setMode(Istream&);

        //- Disallow default bitwise copy construct
        inputModeEntry(const inputModeEntry&);

        //- Disallow default bitwise assignment
        void operator=(const inputModeEntry&);


public:

    //- Runtime type information
    ClassName("inputMode");


    // Member Functions

        //- Execute the functionEntry in a sub-dict context
        static bool execute(dictionary& parentDict, Istream&);

        //- Reset the inputMode to %default (ie, %merge)
        static void clear();

        //- Return true if the inputMode is %merge
        static bool merge();

        //- Return true if the inputMode is %overwrite
        static bool overwrite();

        //- Return true if the inputMode is %protect
        static bool protect();

        //- Return true if the inputMode is %error
        static bool error();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace functionEntries
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //