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 void ReadObject(JsonFunc <string, bool> key, JsonAction readValue)
{
if (key is null)
{
throw new ArgumentNullException(nameof(key));
}
if (readValue is null)
{
throw new ArgumentNullException(nameof(readValue));
}
Initialize(false);
switch (Stacks.Peek().ObjectType)
{
default:
throw new JsonNotSupportException(Stacks.Peek().ObjectType);
case JsonObjectType.Class:
JsonApi.ForEachSerializableMembers(Stacks.Peek().Type, (memberInfo, fieldInfo, propertyInfo, field) => {
bool isReaded = false;
object instance = null;
Type fieldType = null;
object Read()
{
if (isReaded)
{
return(instance);
}
isReaded = true;
switch (memberInfo.MemberType)
{
default:
throw new JsonNotSupportException(memberInfo.MemberType);
case MemberTypes.Field:
fieldType = fieldInfo.FieldType;
return(instance = fieldInfo.GetValue(Stacks.Peek().Instance));
case MemberTypes.Property:
fieldType = propertyInfo.PropertyType;
return(instance = propertyInfo.GetValue(Stacks.Peek().Instance, null));
}
}
object ConverterWrite(object value)
{
if (field?.HasConverter ?? false)
{
if (field.ConverterWriteType != fieldType.BaseType &&
JsonApi.GetElementType(field.ConverterWriteType) != JsonApi.GetElementType(fieldType).BaseType
)
{
fieldType = field.ConverterWriteType;
}
return(field.ConverterWrite(value, Config));
}
return(value);
}
if (!JsonApi.CanSerializeValue(Read(), Config))
{
return;
}
if (key(field?.Name ?? memberInfo.Name))
{
Stacks.Push(new JsonSerializerStack(ConverterWrite(Read()), field));
Stacks.Peek().Type = fieldType;
readValue();
Stacks.Pop();
}
});
break;
case JsonObjectType.DataRow: {
DataRow dataRow = (DataRow)Stacks.Peek().Instance;
for (int i = 0; i < dataRow.Table.Columns.Count; i++)
{
if (key(dataRow.Table.Columns[i].ColumnName))
{
Stacks.Push(new JsonSerializerStack(dataRow[i]));
readValue();
Stacks.Pop();
}
}
break;
}
case JsonObjectType.DataSet: {
DataSet dataSet = (DataSet)Stacks.Peek().Instance;
foreach (DataTable dataTable in dataSet.Tables)
{
if (key(dataTable.TableName))
{
Stacks.Push(new JsonSerializerStack(dataTable));
readValue();
Stacks.Pop();
}
}
break;
}
case JsonObjectType.GenericDictionary:
case JsonObjectType.GenericSortedDictionary:
case JsonObjectType.GenericSortedList: {
IDictionary dictionary = (IDictionary)Stacks.Peek().Instance;
foreach (DictionaryEntry entry in dictionary)
{
if (key(Convert.ToString(entry.Key)))
{
Stacks.Push(new JsonSerializerStack(entry.Value));
readValue();
Stacks.Pop();
}
}
break;
}
case JsonObjectType.GenericKeyValuePair: {
if (key(Convert.ToString(Stacks.Peek().Type.GetProperty("Key").GetValue(Stacks.Peek().Instance, null))))
{
Stacks.Push(new JsonSerializerStack(Stacks.Peek().Type.GetProperty("Value").GetValue(Stacks.Peek().Instance, null)));
readValue();
Stacks.Pop();
}
break;
}
}
}
