/// <inheritdoc />
public IEnumerable<IAnalysisLogDiff> DiffReturnValues(Xml.Value oldValue, Xml.Value newValue)
{
// If both values are not null...
IEnumerable<IAnalysisLogDiff> list;
if (oldValue != null && newValue != null)
{
if (!newValue.IsComparableTo(oldValue))
{
var msg = string.Format(
"Items are incompatible for comparison! oldObject.Item.Type => {0}, newObject.Item.Type => {1}",
oldValue.UnderlyingType,
newValue.UnderlyingType);
throw new ArgumentException(msg);
}
if (newValue.IsPrimtive && oldValue.IsPrimtive && !newValue.AsPrimitive.Equals(oldValue.AsPrimitive))
{
list = new IAnalysisLogDiff[]
{
new ReturnValueAnalysisLogDiff(oldValue.AsPrimitive.Value, newValue.AsPrimitive.Value, newValue.AsPrimitive.FullName)
};
}
else if (newValue.IsObject && oldValue.IsObject)
{
list = this.DiffObjects(oldValue.AsObject, newValue.AsObject);
}
else
{
// No diff.
list = Enumerable.Empty<IAnalysisLogDiff>();
}
}
else if (oldValue == null && newValue == null)
{
// No diff.
list = Enumerable.Empty<IAnalysisLogDiff>();
}
else
{
// Either the old or new value is null. Not sure what happened here--should be impossible.
var msg = string.Format(
"The {0} return value was null! This indicates an analysis log file corruption. Terminating analysis!",
oldValue == null ? "old" : "current");
throw new ArgumentException(msg);
}
return list;
}