public T GetAttribute <T>() where T : Attribute
{
CGFAttributeData attribute = m_Attributes.Find(attributeData => (attributeData.Attribute as T != null));
if (attribute == null)
{
return(null);
}
return(attribute.Attribute as T);
}
public static CGFAttributeDataList Parse(CGFParserReporter reporter, ImmutableArray <Microsoft.CodeAnalysis.AttributeData> attributes)
{
List <CGFAttributeData> attributeDataList = new List <CGFAttributeData>();
foreach (Microsoft.CodeAnalysis.AttributeData attributeData in attributes)
{
CGFAttributeData CGFAttributeData = CGFAttributeData.Parse(reporter, attributeData);
if (CGFAttributeData != null)
{
attributeDataList.Add(CGFAttributeData);
}
}
CGFAttributeDataList CGFAttributeDataList = new CGFAttributeDataList(attributeDataList);
return(CGFAttributeDataList);
}
public static CGFAttributeData Parse(CGFParserReporter reporter, Microsoft.CodeAnalysis.AttributeData attributeData)
{
//TODO - Add way to have custom validation for ArrayAttribute to validate variable name actually matches an serialized variable
Type attributeType = Type.GetType(attributeData.AttributeClass.ToString(), false);
Type baseAttributeType = typeof(CGFAttribute);
if (!attributeType.IsSubclassOf(baseAttributeType))
{
reporter.LogInfo($"Unrecognized attribute type {attributeType.Name}. Attributes are expected to be subtypes of {baseAttributeType.Name}.");
return(null);
}
Attribute attribute = null;
using (reporter.CreateContextScope(CGFParserReporterContext.Type.Type, attributeType.Name))
{
System.Reflection.ConstructorInfo[] constructors = attributeType.GetConstructors();
foreach (System.Reflection.ConstructorInfo constructorInfo in constructors)
{
System.Reflection.ParameterInfo[] parameters = constructorInfo.GetParameters();
if (attributeData.ConstructorArguments.Length != parameters.Length)
{
continue;
}
bool matchingParameters = true;
for (int paramIndex = 0; paramIndex < parameters.Length; ++paramIndex)
{
Microsoft.CodeAnalysis.TypedConstant cgfTypedConstant = attributeData.ConstructorArguments[paramIndex];
System.Reflection.ParameterInfo parameterInfo = parameters[paramIndex];
Type cgfParameterType = null;
if (string.IsNullOrEmpty(cgfTypedConstant.Type.Name))
{
cgfParameterType = Type.GetType(cgfTypedConstant.Type.Name, false);
}
else
{
cgfParameterType = Type.GetType($"{cgfTypedConstant.Type.ContainingSymbol.Name}.{cgfTypedConstant.Type.Name}", false);
}
if (cgfParameterType != parameterInfo.ParameterType)
{
matchingParameters = false;
break;
}
}
if (matchingParameters)
{
if (parameters.Length > 0)
{
Object[] parameterObjects = new Object[parameters.Length];
for (int paramIndex = 0; paramIndex < parameters.Length; ++paramIndex)
{
Microsoft.CodeAnalysis.TypedConstant cgfTypedConstant = attributeData.ConstructorArguments[paramIndex];
System.Reflection.ParameterInfo parameterInfo = parameters[paramIndex];
Object convertedParam = null;
if (parameterInfo.ParameterType.IsEnum)
{
convertedParam = Enum.ToObject(parameterInfo.ParameterType, cgfTypedConstant.Value);
}
else
{
convertedParam = System.Convert.ChangeType(cgfTypedConstant.Value, parameterInfo.ParameterType);
}
parameterObjects[paramIndex] = convertedParam;
}
attribute = Activator.CreateInstance(attributeType, parameterObjects) as Attribute;
}
else
{
attribute = Activator.CreateInstance(attributeType) as Attribute;
}
}
}
if (attribute == null)
{
//TODO - Add provided constructor param list to help finding the error.
// List most likely constructors.
reporter.LogError($"No matching constructor found for {attributeType.Name}.");
return(null);
}
CGFAttributeData CGFAttributeData = new CGFAttributeData(attribute, attributeData);
return(CGFAttributeData);
}
}
