ENH: Move common metadata locic upstream

Moved common metadata logic such as GetMetaData, HasLevelMetadata
and metadata accessors that return a generic vtkInformation object
to the base class. The overlapping AMR additionally extends these
methods by adding the concept of the vtkAMRBox.

Change-Id: Id467d25c246c7baa244aaac2c36c37249a9072fa

Filtering/vtkOverlappingAMR.cxx

@@ -425,33 +425,6 @@ int vtkOverlappingAMR::GetMetaData(
   return 0;
 }
 
-//----------------------------------------------------------------------------
-vtkInformation* vtkOverlappingAMR::GetMetaData(unsigned int level,
-  unsigned int index)
-{
-  vtkMultiPieceDataSet* levelMDS = vtkMultiPieceDataSet::SafeDownCast(
-    this->GetChild(level));
-  if (levelMDS)
-    {
-    return levelMDS->GetMetaData(index);
-    }
-  return 0;
-}
-
-//----------------------------------------------------------------------------
-int vtkOverlappingAMR::HasMetaData(unsigned int level,
-  unsigned int index)
-{
-  vtkMultiPieceDataSet* levelMDS =
-      vtkMultiPieceDataSet::SafeDownCast(this->GetChild(level));
-  if (levelMDS)
-    {
-    return levelMDS->HasMetaData(index);
-    }
-
-  return 0;
-}
-
 //----------------------------------------------------------------------------
 int vtkOverlappingAMRIsInBoxes(vtkAMRBoxList& boxes,
                                        int i, int j, int k)

Filtering/vtkOverlappingAMR.h

@@ -134,18 +134,6 @@ public:
   // Returns the AMR box for the location pointer by the iterator.
   vtkAMRBox GetAMRBox(vtkCompositeDataIterator* iter);
 
-  // Description:
-  // Get meta-data associated with a level. This may allocate a new
-  // vtkInformation object if none is already present. Use HasLevelMetaData to
-  // avoid unnecessary allocations.
-  vtkInformation* GetLevelMetaData(unsigned int level)
-    { return this->GetChildMetaData(level); }
-
-  // Description:
-  // Returns if meta-data exists for a given level.
-  int HasLevelMetaData(unsigned int level)
-    { return this->HasChildMetaData(level); }
-
   // Description:
   // Sets the composite index of the data at the given (level,index) pair.
   void SetCompositeIndex(
@@ -156,20 +144,11 @@ public:
   // (level,index) pair.
   int GetCompositeIndex( const unsigned int level, const unsigned int index );
 
-  // Description:
-  // Get meta-data associated with a dataset.  This may allocate a new
-  // vtkInformation object if none is already present. Use HasMetaData to
-  // avoid unnecessary allocations.
-  vtkInformation* GetMetaData(unsigned int level, unsigned int index);
-
   // Description:
   // Get the AMR box meta-data associated with a given dataset.
   // Returns 1 iff GetMetaData() was successful, else 0.
-  int GetMetaData(unsigned int level, unsigned int index, vtkAMRBox &box);
-
-  // Description:
-  // Returns if meta-data exists for a given dataset under a given level.
-  int HasMetaData(unsigned int level, unsigned int index);
+  virtual int GetMetaData(
+      unsigned int level, unsigned int index, vtkAMRBox &box);
 
   // Description:
   // Sets the refinement of a given level. The spacing at level
@@ -230,14 +209,24 @@ public:
   // Description:
   // Unhiding superclass method.
   virtual vtkInformation* GetMetaData(vtkCompositeDataIterator* iter)
-    { return this->Superclass::GetMetaData(iter); }
+    {return this->Superclass::GetMetaData(iter); }
 
 
   // Description:
   // Unhiding superclass method.
   virtual int HasMetaData(vtkCompositeDataIterator* iter)
-    { return this->Superclass::HasMetaData(iter); }
+    {return this->Superclass::HasMetaData(iter); }
+
+  // Description:
+  // Unhiding superclass method.
+  virtual int HasMetaData(unsigned int level, unsigned int index)
+    {return this->Superclass::HasMetaData(level,index); }
  
+  // Desription:
+  // Unhiding superclass method.
+  virtual vtkInformation* GetMetaData(unsigned int level, unsigned int index)
+   {return this->Superclass::GetMetaData(level,index); }
+
   // Description:
   // Given the level and dataset index, returns the flat index in pre-order
   // traversal.

Filtering/vtkUniformGridAMR.cxx

@@ -137,6 +137,31 @@ void vtkUniformGridAMR::SetDataSet(
     }
 }
 
+//------------------------------------------------------------------------------
+vtkInformation* vtkUniformGridAMR::GetMetaData(unsigned level, unsigned int idx)
+{
+  vtkMultiPieceDataSet *levelMDS =
+      vtkMultiPieceDataSet::SafeDownCast(this->GetChild(level));
+  if( levelMDS != NULL )
+    {
+    return( levelMDS->GetMetaData(idx) );
+    }
+  return NULL;
+}
+
+//------------------------------------------------------------------------------
+int vtkUniformGridAMR::HasMetaData(unsigned int level, unsigned int idx )
+{
+  vtkMultiPieceDataSet* levelMDS =
+      vtkMultiPieceDataSet::SafeDownCast(this->GetChild(level));
+
+  if(levelMDS != NULL)
+    {
+    return( levelMDS->HasMetaData(idx) );
+    }
+  return 0;
+}
+
 //------------------------------------------------------------------------------
 void vtkUniformGridAMR::AppendDataSet(
     unsigned int level, vtkUniformGrid* grid)

Filtering/vtkUniformGridAMR.h

@@ -84,12 +84,33 @@ class VTK_FILTERING_EXPORT vtkUniformGridAMR : public vtkCompositeDataSet
     virtual vtkInformation* GetMetaData(vtkCompositeDataIterator* iter)
      { return this->Superclass::GetMetaData(iter); }
 
-
     // Description:
     // Unhiding superclass method.
     virtual int HasMetaData(vtkCompositeDataIterator* iter)
      { return this->Superclass::HasMetaData(iter); }
 
+    // Description:
+    // Get meta-data associated with a level. This may allocate a new
+    // vtkInformation object if none is already present. Use HasLevelMetaData to
+    // avoid unnecessary allocations.
+    virtual vtkInformation* GetLevelMetaData(unsigned int level)
+     { return this->GetChildMetaData(level); }
+
+    // Description:
+    // Returns if meta-data exists for a given level.
+    virtual int HasLevelMetaData(unsigned int level)
+     { return this->HasChildMetaData(level); }
+
+    // Description:
+    // Get meta-data associated with a dataset.  This may allocate a new
+    // vtkInformation object if none is already present. Use HasMetaData to
+    // avoid unnecessary allocations.
+    virtual vtkInformation* GetMetaData(unsigned int level, unsigned int index);
+
+    // Description:
+    // Returns if meta-data exists for a given dataset under a given level.
+    virtual int HasMetaData(unsigned int level, unsigned int index);
+
     // Description:
     // Sets the dataset at the given level and index. If insufficient number
     // of levels or data slots within the level, this method will grow the