73 lines
3.0 KiB
C#
73 lines
3.0 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace Convention.RScript.Variable
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{
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[System.AttributeUsage(AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
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public sealed class RScriptMethodAttribute : Attribute
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{
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public string Description { get; set; }
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}
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public abstract class RScriptInjectVariable
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{
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public string RScriptString { get; private set; }
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protected abstract string WriteClassHead(Type currentType);
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protected abstract string WriteClassBodyEnter(Type currentType);
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protected abstract string WriteClassMethod(Type returnType, string methodName, string[] parameterNames, Type[] parameterTypes, string description);
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protected abstract string WriteClassBodyExit(Type currentType);
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protected abstract string WriteClassTail(Type currentType);
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public delegate object Generater();
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private Generater MyGenerater;
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public string name { get; private set; }
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public object Generate()
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{
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return MyGenerater();
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}
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public RScriptInjectVariable([MaybeNull]Generater generater, string name)
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{
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var currentType = this.GetType();
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StringBuilder builder = new();
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builder.AppendLine(this.WriteClassHead(currentType));
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builder.AppendLine(this.WriteClassBodyEnter(currentType));
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var scriptMethods = from method in currentType.GetMethods(BindingFlags.Instance | BindingFlags.Public)
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where method.GetCustomAttribute<RScriptMethodAttribute>() != null
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select method;
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foreach (var method in scriptMethods)
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{
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var attr = method.GetCustomAttribute<RScriptMethodAttribute>();
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var returnType = method.ReturnType;
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var methodName = method.Name;
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var parameters = method.GetParameters();
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var parameterNames = from item in parameters select item.Name;
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var parameterTypes = from item in parameters select item.ParameterType;
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builder.AppendLine(this.WriteClassMethod(returnType, methodName, parameterNames.ToArray(), parameterTypes.ToArray(), attr.Description));
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}
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builder.AppendLine(this.WriteClassBodyExit(currentType));
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builder.AppendLine(this.WriteClassTail(currentType));
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this.MyGenerater = generater;
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this.name = name;
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}
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public static object GenerateRScriptVariable(string name, Dictionary<string, RScriptInjectVariable> classes)
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{
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if (classes.TryGetValue(name, out var variable))
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{
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if (variable.MyGenerater != null)
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return variable.Generate();
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}
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throw new InvalidOperationException($"{name} target is not exist or abstract");
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}
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}
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}
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