functionObjects: Further simplification and rationalization using the fvMeshFunctionObject base-class

src/functionObjects/field/fieldValues/fieldValue/fieldValue.C

@@ -49,7 +49,7 @@ Foam::functionObjects::fieldValue::fieldValue
     const word& valueType
 )
 :
-    regionFunctionObject(name, runTime, dict),
+    fvMeshFunctionObject(name, runTime, dict),
     logFiles(obr_, name),
     dict_(dict),
     regionName_(word::null),
@@ -68,7 +68,7 @@ Foam::functionObjects::fieldValue::fieldValue
     const word& valueType
 )
 :
-    regionFunctionObject(name, obr, dict),
+    fvMeshFunctionObject(name, obr, dict),
     logFiles(obr_, name),
     dict_(dict),
     regionName_(word::null),
@@ -89,8 +89,12 @@ Foam::functionObjects::fieldValue::~fieldValue()
 
 bool Foam::functionObjects::fieldValue::read(const dictionary& dict)
 {
-    dict_ = dict;
-    regionFunctionObject::read(dict);
+    if (dict != dict_)
+    {
+        dict_ = dict;
+    }
+
+    fvMeshFunctionObject::read(dict);
 
     dict.lookup("fields") >> fields_;
     dict.lookup("writeFields") >> writeFields_;

src/functionObjects/field/fieldValues/fieldValue/fieldValue.H

@@ -32,7 +32,7 @@ Description
 
 See also
     Foam::functionObject
-    Foam::functionObjects::regionFunctionObject
+    Foam::functionObjects::fvMeshFunctionObject
     Foam::functionObjects::logFiles
 
 SourceFiles
@@ -43,7 +43,7 @@ SourceFiles
 #ifndef functionObjects_fieldValue_H
 #define functionObjects_fieldValue_H
 
-#include "regionFunctionObject.H"
+#include "fvMeshFunctionObject.H"
 #include "logFiles.H"
 #include "Switch.H"
 #include "Field.H"
@@ -65,7 +65,7 @@ namespace functionObjects
 
 class fieldValue
 :
-    public regionFunctionObject,
+    public fvMeshFunctionObject,
     public logFiles
 {
 
@@ -169,9 +169,6 @@ public:
         //- Return the output field values flag
         inline const Switch& writeFields() const;
 
-        //- Helper function to return the reference to the mesh
-        inline const fvMesh& mesh() const;
-
         //- Return access to the latest set of results
         inline const dictionary& resultDict() const;
 

src/functionObjects/field/fieldValues/fieldValue/fieldValueI.H

@@ -53,12 +53,6 @@ Foam::functionObjects::fieldValue::writeFields() const
 }
 
 
-inline const Foam::fvMesh& Foam::functionObjects::fieldValue::mesh() const
-{
-    return refCast<const fvMesh>(obr_);
-}
-
-
 inline const Foam::dictionary&
 Foam::functionObjects::fieldValue::resultDict() const
 {