/// <summary>
/// Creates a new MappingFragment in the existing EntityTypeMapping
/// based on another MappingFragment (fragToClone) in a different artifact.
/// All the other parameters are presumed to already exist in the same artifact
/// as the EntityTypeMapping.
/// </summary>
internal static MappingFragment CloneMappingFragment(
CommandProcessorContext cpc, MappingFragment fragToClone,
EntityTypeMapping existingEntityTypeMapping, StorageEntitySet existingEntitySet)
{
var createFragmentCommand = new CreateMappingFragmentCommand(existingEntityTypeMapping, existingEntitySet);
var cp = new CommandProcessor(cpc, createFragmentCommand);
cp.Invoke();
var frag = createFragmentCommand.MappingFragment;
Debug.Assert(frag != null, "Could not locate or create the required mapping fragment");
if (frag != null)
{
foreach (var sp in fragToClone.ScalarProperties())
{
Property entityProperty = null;
if (sp.Name != null &&
sp.Name.Target != null &&
sp.Name.Target.LocalName != null &&
sp.Name.Target.LocalName.Value != null)
{
entityProperty = ModelHelper.FindPropertyForEntityTypeMapping(
existingEntityTypeMapping, sp.Name.Target.LocalName.Value);
Debug.Assert(
entityProperty != null,
"Cannot find Property with name " + sp.Name.Target.LocalName.Value + " for EntityTypeMapping "
+ existingEntityTypeMapping.ToPrettyString());
}
Property tableColumn = null;
if (frag.StoreEntitySet != null &&
frag.StoreEntitySet.Target != null &&
frag.StoreEntitySet.Target.EntityType != null &&
frag.StoreEntitySet.Target.EntityType.Target != null &&
sp.ColumnName != null &&
sp.ColumnName.Target != null &&
sp.ColumnName.Target.LocalName != null &&
sp.ColumnName.Target.LocalName.Value != null)
{
tableColumn = ModelHelper.FindProperty(
frag.StoreEntitySet.Target.EntityType.Target, sp.ColumnName.Target.LocalName.Value);
Debug.Assert(
tableColumn != null,
"Cannot find Property with name " + sp.ColumnName.Target.LocalName.Value + " for EntityType "
+ frag.StoreEntitySet.Target.EntityType.Target.ToPrettyString());
}
if (entityProperty != null &&
tableColumn != null)
{
var createScalarCommand = new CreateFragmentScalarPropertyCommand(frag, entityProperty, tableColumn);
var cp2 = new CommandProcessor(cpc, createScalarCommand);
cp2.Invoke();
}
}
}
return(frag);
}