protected IEnumerable <ParameterInjection> GetParameterInjections(Type structType, ParameterInfo[] parametersList)
{
List <ParameterInjection> parameters = new List <ParameterInjection>(parametersList.Length);
for (int parameterIndex = 0; parameterIndex < parametersList.Length; parameterIndex++)
{
var p = parametersList[parameterIndex];
ThriftFieldAttribute thriftField = p.GetCustomAttribute <ThriftFieldAttribute>();
/*
* 这里以属性上的 ThriftFieldAttribute 优先，否则将双写 ThriftFieldAttribute 上的各种属性，例如 Required, Name，这将非常麻烦。
* 或许，最合理的方案应该是定义一个 ThriftParameterAttribute，只给一个 id 属性 ？
* JAVA 字段名和构造函数参数均是小驼峰，不存在此问题，但依然存在 Required 必须一致的问题，也很麻烦， 优先使用字段配置可以缓解这个问题。
*/
string extractedName = p.Name;
if (thriftField != null)
{
var field = _fields.FirstOrDefault(f => f.Id == thriftField.Id);
thriftField = field?.Annotation ?? thriftField;
extractedName = field?.ExtractName() ?? p.Name;
}
ParameterInjection parameterInjection = new ParameterInjection(
structType,
parameterIndex,
thriftField,
extractedName,
p.ParameterType
);
parameters.Add(parameterInjection);
}
return(parameters);
}
protected override ThriftFieldMetadata BuildField(IEnumerable <FieldMetadata> input)
{
short id = -1;
//IDictionary<String, String> idlAnnotations = null;
String name = null;
Requiredness requiredness = Requiredness.Unspecified;
bool recursive = false;
IThriftTypeReference thriftTypeReference = null;
// process field injections and extractions
List <IThriftInjection> injections = new List <IThriftInjection>();
IThriftExtraction extraction = null;
foreach (FieldMetadata fieldMetadata in input)
{
id = fieldMetadata.Id;
name = fieldMetadata.Name;
recursive = fieldMetadata.IsRecursiveReference ?? false;
requiredness = fieldMetadata.Requiredness;
//idlAnnotations = fieldMetadata.getIdlAnnotations();
thriftTypeReference = this.Catalog.GetFieldThriftTypeReference(fieldMetadata);
FieldInjection fieldInjection = fieldMetadata as FieldInjection;
if (fieldInjection != null)
{
injections.Add(new ThriftFieldInjection(fieldInjection.Id,
fieldInjection.Name,
fieldInjection.Field,
fieldInjection.Type));
}
else if (fieldMetadata is ParameterInjection)
{
ParameterInjection parameterInjection = (ParameterInjection)fieldMetadata;
injections.Add(new ThriftParameterInjection(
parameterInjection.Id,
parameterInjection.Name,
parameterInjection.ParameterIndex,
fieldMetadata.CSharpType
));
}
else if (fieldMetadata is FieldExtractor)
{
FieldExtractor fieldExtractor = (FieldExtractor)fieldMetadata;
extraction = new ThriftFieldExtractor(
fieldExtractor.Id, fieldExtractor.Name,
fieldExtractor.Type,
fieldExtractor.Field,
fieldExtractor.CSharpType);
}
else if (fieldMetadata is MethodExtractor)
{
MethodExtractor methodExtractor = (MethodExtractor)fieldMetadata;
extraction = new ThriftMethodExtractor(
methodExtractor.Id,
methodExtractor.Name,
methodExtractor.Type,
methodExtractor.Method,
methodExtractor.CSharpType);
}
}
// add type coercion
TypeCoercion coercion = null;
if (!thriftTypeReference.Recursive && thriftTypeReference.Get().IsCoerced)
{
coercion = this.Catalog.GetDefaultCoercion(thriftTypeReference.Get().CSharpType);
}
if (recursive && requiredness != Requiredness.Optional)
{
this.MetadataErrors.AddError($"Struct '{this.StructName}' field '{name}' is recursive but not marked optional");
}
ThriftFieldMetadata thriftFieldMetadata = new ThriftFieldMetadata(
id,
recursive,
requiredness,
//idlAnnotations,
thriftTypeReference,
name,
FieldKind.ThriftField,
injections,
extraction: extraction,
coercion: coercion
);
return(thriftFieldMetadata);
}