private void BuildServiceMethodBody(ILGenerator ilGenerator, ServiceMethodInfo serviceMethodInfo)
{
//确定需要调用的方法
var invokeMethod = serviceMethodInfo.IsAsyncMode ?
GetServiceInvokeAsyncMethod(serviceMethodInfo) :
GetServiceInvokeMethod(serviceMethodInfo);
//确定方法参数
var parameter = serviceMethodInfo.ParameterNameVisibility == ParameterNameVisibility.Hidden ?
GetServiceParameterByObject(ilGenerator, serviceMethodInfo) :
GetServiceParameterByDictionary(ilGenerator, serviceMethodInfo);
//进行方法调用
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldstr, serviceMethodInfo.SysName);
ilGenerator.Emit(OpCodes.Ldstr, serviceMethodInfo.TransactionCode);
ilGenerator.Emit(OpCodes.Ldloc, parameter);
ilGenerator.Emit(IsFakeMode(serviceMethodInfo.ServiceMethod) ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0);
if (serviceMethodInfo.IsAsyncMode)
{
ilGenerator.Emit(OpCodes.Ldarg, serviceMethodInfo.Parameters.Count + 1);
if (serviceMethodInfo.OnErrorCallback != null)
{
ilGenerator.Emit(OpCodes.Ldarg, serviceMethodInfo.Parameters.Count + 2);
}
else
{
ilGenerator.Emit(OpCodes.Ldnull);
}
}
ilGenerator.Emit(OpCodes.Callvirt, invokeMethod);
ilGenerator.Emit(OpCodes.Ret);
}
/// <summary>
/// 处理只有一个参数，且参数类型为引用类型（除string类型)的方式，此时直接对参数进行序列化
/// </summary>
/// <param name="ilGenerator"></param>
/// <param name="serviceMethodInfo"></param>
/// <returns></returns>
private LocalBuilder GetServiceParameterByObject(ILGenerator ilGenerator, ServiceMethodInfo serviceMethodInfo)
{
var parameter = ilGenerator.DeclareLocal(serviceMethodInfo.Parameters.First().ParameterType);
ilGenerator.Emit(OpCodes.Ldarg_1);
ilGenerator.Emit(OpCodes.Stloc, parameter);
return(parameter);
}
private void BuildServiceMethods()
{
foreach (var serviceMethod in serviceType.GetMethods())
{
var serviceMethodInfo = new ServiceMethodInfo(serviceType, serviceMethod);
serviceMethodInfo.Read();
var methodBuilder = DefineMethod(serviceMethod);
var ilGenerator = methodBuilder.GetILGenerator();
BuildServiceMethodBody(ilGenerator, serviceMethodInfo);
}
}
/// <summary>
/// 获取用于进行以异步方式进行服务调用的方法
/// </summary>
/// <param name="serviceMethodInfo"></param>
/// <returns></returns>
private MethodInfo GetServiceInvokeAsyncMethod(ServiceMethodInfo serviceMethodInfo)
{
var invokeMethod = typeof(JavaServiceProxy).GetMethod(
serviceMethodInfo.OnSuccessCallback.ParameterType.IsGenericType ? "InvokeGenericAsync" : "InvokeAsync",
BindingFlags.NonPublic | BindingFlags.Instance);
if (serviceMethodInfo.OnSuccessCallback.ParameterType.IsGenericType)
{
invokeMethod = invokeMethod.MakeGenericMethod(serviceMethodInfo.OnSuccessCallback.ParameterType.GetGenericArguments());
}
return(invokeMethod);
}
/// <summary>
/// 获取用于进行以同步方式进行服务调用的方法
/// </summary>
/// <param name="serviceMethodInfo"></param>
/// <returns></returns>
private MethodInfo GetServiceInvokeMethod(ServiceMethodInfo serviceMethodInfo)
{
var invokeMethod = typeof(JavaServiceProxy).GetMethod(
serviceMethodInfo.ServiceMethod.ReturnType.IsGenericType ? "InvokeGeneric" : "Invoke",
BindingFlags.NonPublic | BindingFlags.Instance);
if (serviceMethodInfo.ServiceMethod.ReturnType.IsGenericType)
{
invokeMethod = invokeMethod.MakeGenericMethod(serviceMethodInfo.ServiceMethod.ReturnType.GetGenericArguments());
}
return(invokeMethod);
}
/// <summary>
/// 处理含有任意个参数的方法，此时将所有参数添加到一个字典中，再进行序列化操作
/// </summary>
/// <param name="ilGenerator"></param>
/// <param name="serviceMethodInfo"></param>
/// <returns></returns>
private LocalBuilder GetServiceParameterByDictionary(ILGenerator ilGenerator, ServiceMethodInfo serviceMethodInfo)
{
var dictType = typeof(Dictionary <string, object>);
var values = ilGenerator.DeclareLocal(dictType);
//values = new Dictionary<string, object>();
ilGenerator.Emit(OpCodes.Newobj, dictType.GetConstructor(Type.EmptyTypes));
ilGenerator.Emit(OpCodes.Stloc, values);
//将所有的参数添加到一个字典中
for (var i = 0; i < serviceMethodInfo.Parameters.Count; i++)
{
//values.Add(name, value);
ilGenerator.Emit(OpCodes.Ldloc, values);
ilGenerator.Emit(OpCodes.Ldstr, serviceMethodInfo.Parameters[i].Name);
ilGenerator.Emit(OpCodes.Ldarg, i + 1);
//对于值类型，进行装箱处理
if (serviceMethodInfo.Parameters[i].ParameterType.IsValueType)
{
ilGenerator.Emit(OpCodes.Box, serviceMethodInfo.Parameters[i].ParameterType);
}
ilGenerator.Emit(OpCodes.Callvirt, dictType.GetMethod("Add"));
}
return(values);
}
