public static TypeDescription Merge(TypeDescription previousDescription,
TypeDescription currentDescription,
TypeDescription baseTypeDescription)
{
previousDescription.ThrowOnBreakingChanges(currentDescription);
var type = previousDescription.ResolvedType;
var typename = currentDescription.FullTypeName;
var typeId = currentDescription.TypeId;
var classification = currentDescription.Classification;
var underlying = currentDescription.UnderlyingEnumTypeDescription;
var fields = FieldDescription.Merge(previousDescription.Fields, currentDescription.Fields);
var description = new TypeDescription(type,
typename,
typeId,
baseTypeDescription,
underlying,
classification,
fields);
return(description);
}
private void ThrowOnBreakingChanges(TypeDescription otherDescription)
{
if (Classification != otherDescription.Classification)
{
throw new BreakingChangeException();
}
foreach (var field in _fields)
{
var otherField = otherDescription._fields.FirstOrDefault(x => Equals(x.Name, field.Name));
if (otherField != null)
{
field.ThrowOnBreakingChanges(otherField);
}
}
var otherUnderlyingType = otherDescription.UnderlyingEnumTypeDescription;
if (UnderlyingEnumTypeDescription == null && otherUnderlyingType != null)
{
throw new BreakingChangeException();
}
if (UnderlyingEnumTypeDescription != null && otherUnderlyingType == null)
{
throw new BreakingChangeException();
}
if (UnderlyingEnumTypeDescription != null && otherUnderlyingType != null)
{
if (!AreSameType(UnderlyingEnumTypeDescription, otherUnderlyingType))
{
throw new BreakingChangeException();
}
}
var otherBaseType = otherDescription.BaseType;
if (BaseType == null && otherBaseType != null)
{
throw new BreakingChangeException(string.Format("The base class of the type '{0}' has been changed from 'null' to '{1}': This is a breaking change!",
FullTypeName,
otherBaseType.FullTypeName));
}
if (BaseType != null && otherBaseType == null)
{
throw new BreakingChangeException(string.Format("The base class of the type '{0}' has been changed from '{1}' to '{0}': This is a breaking change!",
FullTypeName,
BaseType.FullTypeName));
}
if (BaseType != null && otherBaseType != null)
{
if (!AreSameType(BaseType, otherBaseType))
{
throw new
BreakingChangeException(string.Format("The base class of the type '{0}' has been changed from '{1}' to '{2}': This is a breaking change!",
FullTypeName,
BaseType.FullTypeName,
otherBaseType.FullTypeName));
}
BaseType.ThrowOnBreakingChanges(otherDescription.BaseType);
}
}
