private DifferenceType CheckAttributeDifferences(IDifferences differences, IReference target, IEnumerable <ICustomAttribute> implAttributes, IEnumerable <ICustomAttribute> contractAttributes)
{
DifferenceType difference = DifferenceType.Unchanged;
AttributesMapping <IEnumerable <ICustomAttribute> > attributeMapping = new AttributesMapping <IEnumerable <ICustomAttribute> >(_settings);
AttributeComparer attributeComparer = new AttributeComparer();
attributeMapping.AddMapping(0, contractAttributes.OrderBy(a => a, attributeComparer));
attributeMapping.AddMapping(1, implAttributes.OrderBy(a => a, attributeComparer));
foreach (var group in attributeMapping.Attributes)
{
switch (group.Difference)
{
case DifferenceType.Added:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
// Allow for additions
differences.Add(new Difference("AddedAttribute",
$"Attribute '{type.FullName()}' exists on '{target.FullName()}' in the {Implementation} but not the {Contract}."));
break;
}
case DifferenceType.Changed:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
string contractKey = attributeComparer.GetKey(group[0].Attributes.First());
string implementationKey = attributeComparer.GetKey(group[1].Attributes.First());
differences.AddIncompatibleDifference("CannotChangeAttribute",
$"Attribute '{type.FullName()}' on '{target.FullName()}' changed from '{contractKey}' in the {Contract} to '{implementationKey}' in the {Implementation}.");
difference = DifferenceType.Changed;
break;
}
case DifferenceType.Removed:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
differences.AddIncompatibleDifference("CannotRemoveAttribute",
$"Attribute '{type.FullName()}' exists on '{target.FullName()}' in the {Contract} but not the {Implementation}.");
// removals of an attribute are considered a "change" of the type
difference = DifferenceType.Changed;
break;
}
}
}
return(difference);
}
private bool CheckAttributeDifferences(IDifferences differences, IReference target, IEnumerable <ICustomAttribute> implAttributes, IEnumerable <ICustomAttribute> contractAttributes, IReference member = null)
{
AttributesMapping <IEnumerable <ICustomAttribute> > attributeMapping = new AttributesMapping <IEnumerable <ICustomAttribute> >(_settings);
AttributeComparer attributeComparer = new AttributeComparer();
attributeMapping.AddMapping(0, contractAttributes.OrderBy(a => a, attributeComparer));
attributeMapping.AddMapping(1, implAttributes.OrderBy(a => a, attributeComparer));
string errString = $"'{target.FullName()}'";
if (target is IParameterDefinition || target is IGenericParameter)
{
errString = target is IGenericParameter ? "generic param" : "parameter";
errString += $" '{target.FullName()}' on member '{member?.FullName()}'";
}
bool changed = false;
foreach (var group in attributeMapping.Attributes)
{
switch (group.Difference)
{
case DifferenceType.Added:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
// Allow for additions
differences.Add(new Difference("AddedAttribute",
$"Attribute '{type.FullName()}' exists on {errString} in the {Implementation} but not the {Contract}."));
changed = true;
break;
}
case DifferenceType.Changed:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
string contractKey = attributeComparer.GetKey(group[0].Attributes.First());
string implementationKey = attributeComparer.GetKey(group[1].Attributes.First());
differences.AddIncompatibleDifference("CannotChangeAttribute",
$"Attribute '{type.FullName()}' on {errString} changed from '{contractKey}' in the {Contract} to '{implementationKey}' in the {Implementation}.");
changed = true;
break;
}
case DifferenceType.Removed:
{
ITypeReference type = group.Representative.Attributes.First().Type;
if (AttributeFilter.ShouldExclude(type.DocId()))
{
break;
}
differences.AddIncompatibleDifference("CannotRemoveAttribute",
$"Attribute '{type.FullName()}' exists on {errString} in the {Contract} but not the {Implementation}.");
// removals of an attribute are considered a "change" of the type
changed = true;
break;
}
}
}
return(changed);
}
