/// <summary>
/// Returns a DIFieldType for the specified method, with the metadata set and Name, Type,
/// Description, and DeprecationReason properties initialized.
/// </summary>
public static DIFieldType?CreateField(MethodInfo method, Func <Type> inferGraphType)
{
//get the method name
string methodName = method.Name;
var methodNameAttribute = method.GetCustomAttribute <NameAttribute>();
if (methodNameAttribute != null)
{
methodName = methodNameAttribute.Name;
}
else
{
if (methodName.EndsWith("Async") && method.ReturnType.IsGenericType && method.ReturnType.GetGenericTypeDefinition() == typeof(Task <>))
{
methodName = methodName.Substring(0, methodName.Length - "Async".Length);
}
}
if (methodName == null)
{
return(null); //ignore method if set to null
}
//ignore method if it does not return a value
if (method.ReturnType == typeof(void) || method.ReturnType == typeof(Task))
{
return(null);
}
//determine the graphtype of the field
var graphTypeAttribute = method.GetCustomAttribute <GraphTypeAttribute>();
Type?graphType = graphTypeAttribute?.Type;
//infer the graphtype if it is not specified
if (graphType == null)
{
graphType = inferGraphType();
}
//load the description
string?description = method.GetCustomAttribute <DescriptionAttribute>()?.Description;
//load the deprecation reason
string?obsoleteDescription = method.GetCustomAttribute <ObsoleteAttribute>()?.Message;
var fieldType = new DIFieldType {
Name = methodName,
Type = graphType,
Description = description,
DeprecationReason = obsoleteDescription,
};
//load the metadata
foreach (var metaAttribute in method.GetCustomAttributes <MetadataAttribute>())
{
fieldType.WithMetadata(metaAttribute.Key, metaAttribute.Value);
}
return(fieldType);
}
/// <summary>
/// Returns a DIFieldType for the specified property, with the metadata set and Name, Type,
/// Description, and DeprecationReason properties initialized.
/// </summary>
public static DIFieldType?CreateField(PropertyInfo property, Func <Type> inferGraphType)
{
//get the field name
string fieldName = property.Name;
var fieldNameAttribute = property.GetCustomAttribute <NameAttribute>();
if (fieldNameAttribute != null)
{
fieldName = fieldNameAttribute.Name;
}
if (fieldName == null)
{
return(null); //ignore field if set to null (or Ignore is specified)
}
//determine the graphtype of the field
var graphTypeAttribute = property.GetCustomAttribute <GraphTypeAttribute>();
Type?graphType = graphTypeAttribute?.Type;
//infer the graphtype if it is not specified
if (graphType == null)
{
graphType = inferGraphType();
}
//load the description
string?description = property.GetCustomAttribute <DescriptionAttribute>()?.Description;
//load the deprecation reason
string?obsoleteDescription = property.GetCustomAttribute <ObsoleteAttribute>()?.Message;
//create the field
var fieldType = new DIFieldType {
Name = fieldName,
Type = graphType,
Description = description,
DeprecationReason = obsoleteDescription,
};
//set name of property
fieldType.WithMetadata(ORIGINAL_EXPRESSION_PROPERTY_NAME, property.Name);
//load the metadata
foreach (var metaAttribute in property.GetCustomAttributes <MetadataAttribute>())
{
fieldType.WithMetadata(metaAttribute.Key, metaAttribute.Value);
}
//return the field
return(fieldType);
}