ENH: MeshObject: specify name (instead of typeName)

applications/test/gravityMeshObject/Make/files

@@ -0,0 +1,3 @@
+Test-gravityMeshObject.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-gravityMeshObject

applications/test/gravityMeshObject/Make/options

@@ -0,0 +1,5 @@
+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude
+
+EXE_LIBS = \
+    -lfiniteVolume

applications/test/gravityMeshObject/Test-gravityMeshObject.C

@@ -0,0 +1,88 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2023 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/>.
+
+Description
+    Test loading of different gravity items
+
+\*---------------------------------------------------------------------------*/
+
+#include "MeshObject.H"
+#include "gravityMeshObject.H"
+#include "IOobjectList.H"
+#include "IOstreams.H"
+#include "argList.H"
+#include "Time.H"
+
+using namespace Foam;
+
+void printInfo(const meshObjects::gravity& g)
+{
+    Pout<< "name:" << g.uniformDimensionedVectorField::name()
+        << " type:" << g.type()
+        << " value:" << g.value() << nl;
+}
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    #include "setRootCase.H"
+    #include "createTime.H"
+
+    IOobjectList objects(runTime, runTime.constant());
+
+    Info<< "Found: " << objects << nl << endl;
+
+    for (const IOobject& io : objects.sorted<uniformDimensionedVectorField>())
+    {
+        if (io.name() == meshObjects::gravity::typeName)
+        {
+            const auto& g = meshObjects::gravity::New(runTime);
+            printInfo(g);
+        }
+        else
+        {
+            const auto& g = meshObjects::gravity::New(io.name(), runTime);
+            printInfo(g);
+        }
+
+        Pout<< "registered:" << flatOutput(runTime.sortedToc()) << nl << endl;
+    }
+
+    meshObjects::gravity::Delete("g", runTime);
+    meshObjects::gravity::Delete("something-not-in-registry", runTime);
+
+    Info<< "after Delete" << nl;
+    Pout<< "registered:" << flatOutput(runTime.sortedToc()) << endl;
+
+    Info<< "\nEnd\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //

applications/test/gravityMeshObject/case1/constant/banana

@@ -0,0 +1,21 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2212                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       uniformDimensionedVectorField;
+    location    "constant";
+    object      banana;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -2 0 0 0 0];
+value           (0 0 -10);
+
+// ************************************************************************* //

applications/test/gravityMeshObject/case1/constant/g

@@ -0,0 +1,21 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2212                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       uniformDimensionedVectorField;
+    location    "constant";
+    object      g;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -2 0 0 0 0];
+value           (0 -9.81 0);
+
+// ************************************************************************* //

applications/test/gravityMeshObject/case1/constant/saturn

@@ -0,0 +1,21 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2212                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       uniformDimensionedVectorField;
+    location    "constant";
+    object      saturn;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 -2 0 0 0 0];
+value           (-100 0 0);
+
+// ************************************************************************* //

applications/test/gravityMeshObject/case1/system/controlDict

@@ -0,0 +1,34 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2212                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     blockMesh;
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         10;
+
+deltaT          1;
+
+writeControl    timeStep;
+
+writeInterval   1;
+
+// ************************************************************************* //