public void Merge(ElementDefinition snap, ElementDefinition diff)
{
bool isExtensionConstraint = snap.Path == "Extension" || snap.IsExtension();
// representation cannot be overridden
snap.NameElement = mergePrimitiveAttribute(snap.NameElement, diff.NameElement);
// Codes are cumulative based on the code value
snap.Code = mergeCollection(snap.Code, diff.Code, (a, b) => a.Code == b.Code);
// For extensions, the base definition is irrelevant since they describe infrastructure, and the diff should contain the real meaning for the elements
// In case the diff doesn't have these, give some generic defaults.
if (isExtensionConstraint)
{
snap.Short = "Extension"; markChange(snap.ShortElement);
snap.Definition = "An Extension"; markChange(snap.DefinitionElement);
snap.Comments = null;
snap.Requirements = null;
snap.Label = "Extension"; markChange(snap.LabelElement);
snap.AliasElement = new List <FhirString>();
snap.Mapping = new List <ElementDefinition.ElementDefinitionMappingComponent>();
}
else
{
snap.ShortElement = mergePrimitiveAttribute(snap.ShortElement, diff.ShortElement);
snap.DefinitionElement = mergePrimitiveAttribute(snap.DefinitionElement, diff.DefinitionElement, allowAppend: true);
snap.CommentsElement = mergePrimitiveAttribute(snap.CommentsElement, diff.CommentsElement, allowAppend: true);
snap.RequirementsElement = mergePrimitiveAttribute(snap.RequirementsElement, diff.RequirementsElement, allowAppend: true);
snap.LabelElement = mergePrimitiveAttribute(snap.LabelElement, diff.LabelElement);
// Aliases are cumulative based on the string value
snap.AliasElement = mergeCollection(snap.AliasElement, diff.AliasElement, (a, b) => a.Value == b.Value);
// Mappings are cumulative, but keep unique on full contents
snap.Mapping = mergeCollection(snap.Mapping, diff.Mapping, (a, b) => a.IsExactly(b));
}
snap.MinElement = mergePrimitiveAttribute(snap.MinElement, diff.MinElement);
snap.MaxElement = mergePrimitiveAttribute(snap.MaxElement, diff.MaxElement);
// ElementDefinition.nameReference cannot be overridden by a derived profile
// defaultValue and meaningWhenMissing can only be set in a resource/datatype/extension definition and cannot be overridden
snap.Fixed = mergeComplexAttribute(snap.Fixed, diff.Fixed);
snap.Pattern = mergeComplexAttribute(snap.Pattern, diff.Pattern);
snap.Example = mergeComplexAttribute(snap.Example, diff.Example);
snap.MaxLengthElement = mergePrimitiveAttribute(snap.MaxLengthElement, diff.MaxLengthElement);
// TODO: [GG] what to do about conditions? [EK] We have key, so merge Constraint and condition based on that?
snap.MustSupportElement = mergePrimitiveAttribute(snap.MustSupportElement, diff.MustSupportElement);
// ElementDefinition.isModifier can only be overridden by a derived extension
if (isExtensionConstraint)
{
snap.IsModifierElement = mergePrimitiveAttribute(snap.IsModifierElement, diff.IsModifierElement);
}
snap.IsSummaryElement = mergePrimitiveAttribute(snap.IsSummaryElement, diff.IsSummaryElement);
snap.Binding = mergeComplexAttribute(snap.Binding, diff.Binding);
// Type is just overridden
if (!diff.Type.IsNullOrEmpty() && !diff.IsExactly(snap))
{
snap.Type = new List <ElementDefinition.TypeRefComponent>(diff.Type.DeepCopy());
foreach (var element in snap.Type)
{
markChange(snap);
}
}
// Constraints are cumulative bassed on Constraint.id
snap.Constraint = mergeCollection(snap.Constraint, diff.Constraint, (a, b) => a.Key == b.Key);
snap.Slicing = mergeComplexAttribute(snap.Slicing, diff.Slicing);
// TODO: What happens to extensions present on an ElementDefinition that is overriding another?
}
public void Merge(ElementDefinition snap, ElementDefinition diff)
{
bool isExtensionConstraint = snap.Path == "Extension" || snap.IsExtension();
// paths can be changed under one circumstance: the snap is a choice[x] element, and diff limits the type choices
// to one. The name can then be changed to choiceXXXX, where XXXX is the name of the type.
if (snap.Path != diff.Path && snap.IsChoice() && diff.Type.Count() == 1)
{
if (snap.Path.Substring(0, snap.Path.Length - 3) + diff.Type.First().Code.ToString().Capitalize() != diff.Path)
{
throw Error.InvalidOperation("Path cannot be changed from {0} to {1}, since the type is sliced to {2}"
.FormatWith(snap.Path, diff.Path, diff.Type.First().Code));
}
snap.PathElement = mergePrimitiveAttribute(snap.PathElement, diff.PathElement);
}
// representation cannot be overridden
snap.NameElement = mergePrimitiveAttribute(snap.NameElement, diff.NameElement);
// Codes are cumulative based on the code value
snap.Code = mergeCollection(snap.Code, diff.Code, (a, b) => a.Code == b.Code);
// For extensions, the base definition is irrelevant since they describe infrastructure, and the diff should contain the real meaning for the elements
// In case the diff doesn't have these, give some generic defaults.
if (isExtensionConstraint)
{
snap.Short = "Extension"; markChange(snap.ShortElement);
snap.Definition = "An Extension"; markChange(snap.DefinitionElement);
snap.Comments = null;
snap.Requirements = null;
snap.AliasElement = new List <FhirString>();
snap.Mapping = new List <ElementDefinition.MappingComponent>();
}
snap.ShortElement = mergePrimitiveAttribute(snap.ShortElement, diff.ShortElement);
snap.DefinitionElement = mergePrimitiveAttribute(snap.DefinitionElement, diff.DefinitionElement, allowAppend: true);
snap.CommentsElement = mergePrimitiveAttribute(snap.CommentsElement, diff.CommentsElement, allowAppend: true);
snap.RequirementsElement = mergePrimitiveAttribute(snap.RequirementsElement, diff.RequirementsElement, allowAppend: true);
snap.LabelElement = mergePrimitiveAttribute(snap.LabelElement, diff.LabelElement);
// Aliases are cumulative based on the string value
snap.AliasElement = mergeCollection(snap.AliasElement, diff.AliasElement, (a, b) => a.Value == b.Value);
// Mappings are cumulative, but keep unique on full contents
snap.Mapping = mergeCollection(snap.Mapping, diff.Mapping, (a, b) => a.IsExactly(b));
snap.MinElement = mergePrimitiveAttribute(snap.MinElement, diff.MinElement);
snap.MaxElement = mergePrimitiveAttribute(snap.MaxElement, diff.MaxElement);
// snap.base should already be there, and is not changed by the diff
// Type is just overridden
if (!diff.Type.IsNullOrEmpty() && !diff.IsExactly(snap))
{
snap.Type = new List <ElementDefinition.TypeRefComponent>(diff.Type.DeepCopy());
foreach (var element in snap.Type)
{
markChange(snap);
}
}
// ElementDefinition.nameReference cannot be overridden by a derived profile
// defaultValue and meaningWhenMissing can only be set in a resource/datatype/extension definition and cannot be overridden
snap.Fixed = mergeComplexAttribute(snap.Fixed, diff.Fixed);
snap.Pattern = mergeComplexAttribute(snap.Pattern, diff.Pattern);
snap.Example = mergeComplexAttribute(snap.Example, diff.Example);
snap.MinValue = mergeComplexAttribute(snap.MinValue, diff.MinValue);
snap.MaxValue = mergeComplexAttribute(snap.MaxValue, diff.MaxValue);
snap.MaxLengthElement = mergePrimitiveAttribute(snap.MaxLengthElement, diff.MaxLengthElement);
// TODO: [GG] what to do about conditions? [EK] We have key, so merge Constraint and condition based on that?
// Constraints are cumulative, so they are always "new" (hence a constant false for the comparer)
snap.Constraint = mergeCollection(snap.Constraint, diff.Constraint, (a, b) => false);
snap.MustSupportElement = mergePrimitiveAttribute(snap.MustSupportElement, diff.MustSupportElement);
// ElementDefinition.isModifier can only be overridden by a derived extension
if (isExtensionConstraint)
{
snap.IsModifierElement = mergePrimitiveAttribute(snap.IsModifierElement, diff.IsModifierElement);
}
snap.IsSummaryElement = mergePrimitiveAttribute(snap.IsSummaryElement, diff.IsSummaryElement);
snap.Binding = mergeComplexAttribute(snap.Binding, diff.Binding);
snap.Slicing = mergeComplexAttribute(snap.Slicing, diff.Slicing);
// TODO: What happens to extensions present on an ElementDefinition that is overriding another?
}
