object ConverterRead(Type type, object instance, JsonField field)
{
if (type is null)
{
throw new ArgumentNullException(nameof(type));
}
if (field?.HasConverter ?? false)
{
Type readType;
if (field.ConverterReadType == type.BaseType || JsonApi.GetElementType(field.ConverterReadType) == JsonApi.GetElementType(type).BaseType) //todo 让多个转换器之间也支持
{
readType = type;
}
else
{
readType = field.ConverterReadType;
}
return(JsonApi.ChangeType(field.ConverterRead(BuildValue(readType, instance), Config), type, Config));
}
return(BuildValue(type, instance));
}
public JsonSerializerStack(object instance, JsonField field)
{
Instance = instance;
Field = field;
}
public static bool CanSerializeMember(MemberInfo memberInfo, out FieldInfo fieldInfo, out PropertyInfo propertyInfo, out JsonField field)
{
if (memberInfo is null)
{
throw new ArgumentNullException(nameof(memberInfo));
}
switch (memberInfo.MemberType)
{
case MemberTypes.Field: {
fieldInfo = (FieldInfo)memberInfo;
propertyInfo = null;
if (GetCustomAttribute <JsonIgnoreField> (memberInfo) != null)
{
field = null;
return(false);
}
field = GetCustomAttribute <JsonField> (memberInfo);
if (!fieldInfo.IsPublic && field is null)
{
return(false);
}
return(true);
}
case MemberTypes.Property: {
propertyInfo = (PropertyInfo)memberInfo;
fieldInfo = null;
if (!propertyInfo.CanRead || !propertyInfo.CanWrite || GetCustomAttribute <JsonIgnoreField> (memberInfo) != null)
{
field = null;
return(false);
}
field = GetCustomAttribute <JsonField> (memberInfo);
return(true);
}
default:
propertyInfo = null;
fieldInfo = null;
field = null;
return(false);
}
}
public object BuildObject(Type type, object instance = null)
{
if (type is null)
{
throw new ArgumentNullException(nameof(type));
}
if (!JsonApi.TryGetObjectType(type, out JsonObjectType objectType))
{
throw new JsonNotSupportException(type);
}
if (instance?.GetType() != type)
{
instance = JsonApi.CreateInstance(type);
}
switch (objectType)
{
default:
throw new JsonNotSupportException(objectType);
case JsonObjectType.Class: {
MemberInfo memberInfo = null;
FieldInfo fieldInfo = null;
PropertyInfo propertyInfo = null;
JsonField field = null;
Reader.ReadObject(name => {
foreach (MemberInfo current in JsonApi.GetMembers(type))
{
if (JsonApi.CanSerializeMember(current, out fieldInfo, out propertyInfo, out field))
{
if (JsonApi.Equals(name, field?.Name ?? current.Name, Config))
{
memberInfo = current;
return(true);
}
}
}
return(false);
}, () => {
object value;
switch (memberInfo.MemberType)
{
default:
throw new JsonNotSupportException(memberInfo.MemberType);
case MemberTypes.Field:
value = ConverterRead(fieldInfo.FieldType, fieldInfo.GetValue(instance), field);
break;
case MemberTypes.Property:
value = ConverterRead(propertyInfo.PropertyType, propertyInfo.GetValue(instance, null), field);
break;
}
if (!JsonApi.CanSerializeValue(value, Config))
{
return;
}
switch (memberInfo.MemberType)
{
default:
throw new JsonNotSupportException(memberInfo.MemberType);
case MemberTypes.Field:
fieldInfo.SetValue(instance, value);
break;
case MemberTypes.Property:
propertyInfo.SetValue(instance, value, null);
break;
}
});
return(instance);
}
case JsonObjectType.DataSet: {
DataSet dataSet = (DataSet)instance;
string tableName = null;
Reader.ReadObject(name => {
tableName = name;
return(true);
}, () => {
DataTable dataTable = dataSet.Tables[tableName];
bool hasTable = dataTable != null;
dataTable = BuildArray <DataTable> (dataTable);
if (!hasTable)
{
dataSet.Tables.Add(dataTable);
}
dataTable.TableName = JsonApi.Naming(tableName, Config.NamingType);
});
return(instance);
}
case JsonObjectType.GenericDictionary:
case JsonObjectType.GenericSortedDictionary:
case JsonObjectType.GenericSortedList: {
Type keyType = type.GetGenericArguments()[0];
Type valueType = type.GetGenericArguments()[1];
IDictionary dictionary = (IDictionary)instance;
dictionary.Clear();
object key = null;
Reader.ReadObject(name => {
key = JsonApi.ChangeType(JsonApi.Naming(name, Config.NamingType), keyType, Config);
return(true);
}, () => {
dictionary[key] = BuildValue(valueType);
});
return(instance);
}
case JsonObjectType.GenericKeyValuePair: {
Type keyType = type.GetGenericArguments()[0];
Type valueType = type.GetGenericArguments()[1];
Reader.ReadObject(name => {
type.GetRuntimeField("key").SetValue(instance, JsonApi.ChangeType(JsonApi.Naming(name, Config.NamingType), keyType, Config));
return(true);
}, () => {
FieldInfo fieldInfo = type.GetRuntimeField("value");
fieldInfo.SetValue(instance, BuildValue(valueType, fieldInfo.GetValue(instance)));
});
return(instance);
}
}
}
