environmentVariable.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2024 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
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    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::substitutionModels::environmentVariable
 
Description
    The \c environmentVariable substitution model.
 
    \verbatim
    environmentVariables1
    {
        // Mandatory entries
        type        environmentVariable;
 
        entries
        {
            home    "HOME";
            ldpath  "LD_LIBRARY_PATH";
        }
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    The entries mean:
    \table
      Property     | Description                        | Type | Reqd  | Deflt
      type         | Type name: environmentVariable     | word |  yes  | -
      entries      | Keyword lookup pairs               | dictionary | yes | -
    \endtable
 
    The inherited entries are elaborated in:
      - \link substitutionModel.H \endlink
 
SourceFiles
    environmentVariable.C
 
---------------------------------------------------------------------------*/
 
#ifndef Foam_substitutionModels_environmentVariable_H
#define Foam_substitutionModels_environmentVariable_H
 
#include "substitutionModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
namespace substitutionModels
{
 
/*---------------------------------------------------------------------------*\
                  Class environmentVariable Declaration
\*---------------------------------------------------------------------------*/
 
class environmentVariable
:
    public substitutionModel
{
    // Private Data
 
        //- Hash table for key and environment variable pairs
        HashTable<string> entries_;
 
 
    // Private Functions
 
        //- No copy construct
        environmentVariable(const environmentVariable&) = delete;
 
        //- No copy assignment
        void operator=(const environmentVariable&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("environmentVariable");
 
 
    //- Constructor
    environmentVariable(const dictionary& dict, const Time& time);
 
 
    //- Destructor
    virtual ~environmentVariable() = default;
 
 
    // Member Functions
 
        //- Return true of model applies to this keyName
        virtual bool valid(const word& keyName) const;
 
        //- Apply substitutions to this string buffer
        virtual bool apply(const word& key, string& buffer) const;
 
        //- Return a word list of the keys
        virtual wordList keys() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace substitutionModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //