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using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
namespace Apewer.Web
{
/// <summary>API 行为的参数。</summary>
public sealed class ApiParameter : IToJson
{
ParameterInfo _parameter = null;
bool _body = false;
bool _query = false;
/// <summary></summary>
public ParameterInfo ParameterInfo { get => _parameter; }
/// <summary></summary>
public string Name { get => _parameter.Name; }
/// <summary></summary>
public Type Type { get => _parameter.ParameterType; }
/// <summary></summary>
public bool FromBody { get => _body; }
/// <summary></summary>
public bool FromQuery { get => _query; }
/// <summary></summary>
public override string ToString() => _parameter.Name;
/// <summary></summary>
public Json ToJson()
{
var format = ApiActionJsonFormat.Default ?? new ApiActionJsonFormat();
var withReflection = format.WithReflection;
return ToJson(withReflection);
}
/// <summary></summary>
public Json ToJson(bool withReflection)
{
var json = Json.NewObject();
json.SetProperty("name", _parameter.Name);
if (withReflection)
{
json.SetProperty("type", _parameter.ParameterType.Name);
}
if (_body) json.SetProperty("fromBody", _body);
if (_query) json.SetProperty("fromQuery", _query);
return json;
}
/// <summary></summary>
/// <exception cref="ArgumentNullException" />
ApiParameter(ParameterInfo parameterInfo)
{
_parameter = parameterInfo ?? throw new ArgumentNullException(nameof(parameterInfo));
_query = RuntimeUtility.Contains<FromQueryAttribute>(parameterInfo);
_body = RuntimeUtility.Contains<FromBodyAttribute>(parameterInfo);
}
/// <summary></summary>
public static ApiParameter Parse(ParameterInfo parameter)
{
if (parameter == null) return null;
if (parameter.IsOut) return null;
if (parameter.IsRetval) return null;
return new ApiParameter(parameter);
}
}
}