DynamicID.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011 OpenFOAM Foundation
    Copyright (C) 2018 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::DynamicID
 
Description
    A class that holds the data needed to identify things (zones, patches)
    in a dynamic mesh.
 
    The thing is identified by name.
    Its indices are updated if the mesh has changed.
 
\*---------------------------------------------------------------------------*/
 
#ifndef DynamicID_H
#define DynamicID_H
 
#include "keyType.H"
#include "labelList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declarations
template<class> class DynamicID;
template<class ObjectType>
Ostream& operator<<(Ostream&, const DynamicID<ObjectType>&);
 
/*---------------------------------------------------------------------------*\
                          Class DynamicID Declaration
\*---------------------------------------------------------------------------*/
 
template<class ObjectType>
class DynamicID
{
    // Private data
 
        //- Zone name
        keyType key_;
 
        //- Zone indices
        labelList indices_;
 
 
public:
 
    // Constructors
 
        //- Construct from name
        DynamicID(const keyType& key, const ObjectType& obj)
        :
            key_(key),
            indices_(obj.indices(key_))
        {}
 
        //- Construct from Istream
        DynamicID(Istream& is, const ObjectType& obj)
        :
            key_(is),
            indices_(obj.indices(key_))
        {}
 
 
    //- Destructor
    ~DynamicID() = default;
 
 
    // Member Functions
 
        // Access
 
            //- Return name
            const keyType& name() const
            {
                return key_;
            }
 
            //- Return indices of matching zones
            const labelList& indices() const
            {
                return indices_;
            }
 
            //- Return index of first matching zone
            label index() const
            {
                return indices_.empty() ? -1 : indices_.first();
            }
 
            //- Has the zone been found
            bool active() const
            {
                return !indices_.empty();
            }
 
 
        // Edit
 
            //- Update
            void update(const ObjectType& obj)
            {
                indices_ = obj.indices(key_);
            }
 
 
    // IOstream Operators
 
        friend Ostream& operator<< <ObjectType>
        (Ostream&, const DynamicID<ObjectType>&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class ObjectType>
Ostream& operator<<(Ostream& os, const DynamicID<ObjectType>& dynId)
{
    os  << token::BEGIN_LIST
        << dynId.name() << token::SPACE << dynId.index()
        << token::END_LIST;
 
    os.check(FUNCTION_NAME);
    return os;
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //