ENH: distinguish between cell/face/point topoSetSource (#1060)

- add intermediate classes topoSetCellSource, topoSetFaceSource,
  topoSetPointSource and corresponding New() factories

src/meshTools/sets/pointSources/topoSetPointSource/topoSetPointSource.C

@@ -0,0 +1,95 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2018 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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "topoSetPointSource.H"
+#include "polyMesh.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(topoSetPointSource, 0);
+    defineRunTimeSelectionTable(topoSetPointSource, word);
+    defineRunTimeSelectionTable(topoSetPointSource, istream);
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::topoSetPointSource::topoSetPointSource(const polyMesh& mesh)
+:
+    topoSetSource(mesh)
+{}
+
+
+// * * * * * * * * * * * * * * * * Selectors * * * * * * * * * * * * * * * * //
+
+Foam::autoPtr<Foam::topoSetPointSource> Foam::topoSetPointSource::New
+(
+    const word& sourceType,
+    const polyMesh& mesh,
+    const dictionary& dict
+)
+{
+    auto cstrIter = wordConstructorTablePtr_->cfind(sourceType);
+
+    if (!cstrIter.found())
+    {
+        FatalErrorInFunction
+            << "Unknown topoSetPointSource type "
+            << sourceType << nl << nl
+            << "Valid types :" << endl
+            << wordConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<topoSetPointSource>(cstrIter()(mesh, dict));
+}
+
+
+Foam::autoPtr<Foam::topoSetPointSource> Foam::topoSetPointSource::New
+(
+    const word& sourceType,
+    const polyMesh& mesh,
+    Istream& is
+)
+{
+    auto cstrIter = istreamConstructorTablePtr_->cfind(sourceType);
+
+    if (!cstrIter.found())
+    {
+        FatalErrorInFunction
+            << "Unknown topoSetPointSource type "
+            << sourceType << nl << nl
+            << "Valid types :" << endl
+            << istreamConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<topoSetPointSource>(cstrIter()(mesh, is));
+}
+
+
+// ************************************************************************* //