450 lines
18 KiB
C#
450 lines
18 KiB
C#
using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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namespace JiShe.CollectBus.IncrementalGenerator
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{
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/// <summary>
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/// 复杂类型增量源生成器
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/// </summary>
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[Generator(LanguageNames.CSharp)]
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public class ComplexTypeSourceAnalyzers : IIncrementalGenerator
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{
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private const string AttributeFullName = "JiShe.CollectBus.Analyzers.Shared.SourceAnalyzersAttribute";
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private const string SourceEntityAccessorFactoryNamespace = "JiShe.CollectBus.Analyzers.Shared";
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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//Debugger.Launch();
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// 步骤1：筛选带有 [SourceAnalyzers] 的类
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var classDeclarations = context.SyntaxProvider
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.CreateSyntaxProvider(
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predicate: static (s, _) => IsClassWithAttribute(s),
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transform: static (ctx, _) => GetClassDeclaration(ctx))
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.Where(static c => c is not null);
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// 步骤2：合并编译信息
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var compilationAndClasses = context.CompilationProvider.Combine(classDeclarations.Collect());
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context.RegisterSourceOutput(compilationAndClasses, (spc, source) =>
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GenerateCode(source.Left, source.Right!, spc));
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}
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private static bool IsClassWithAttribute(SyntaxNode node) => node is ClassDeclarationSyntax cds && cds.AttributeLists.Count > 0;
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private static ClassDeclarationSyntax GetClassDeclaration(GeneratorSyntaxContext context)
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{
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var classDecl = (ClassDeclarationSyntax)context.Node;
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var attributeType = context.SemanticModel.Compilation.GetTypeByMetadataName(AttributeFullName);
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foreach (var attribute in classDecl.AttributeLists.SelectMany(al => al.Attributes))
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{
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var symbol = context.SemanticModel.GetSymbolInfo(attribute).Symbol;
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if (symbol is IMethodSymbol ctor &&
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SymbolEqualityComparer.Default.Equals(ctor.ContainingType, attributeType))
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{
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return classDecl;
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}
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}
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return null;
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}
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/// <summary>
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/// 递归获取所有层级的属性
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/// </summary>
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/// <param name="classSymbol"></param>
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/// <returns></returns>
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private static IEnumerable<IPropertySymbol> GetAllPropertiesInHierarchy(INamedTypeSymbol classSymbol)
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{
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var currentSymbol = classSymbol;
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while (currentSymbol != null)
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{
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foreach (var prop in currentSymbol.GetMembers().OfType<IPropertySymbol>())
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{
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yield return prop;
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}
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currentSymbol = currentSymbol.BaseType; // 向上遍历基类
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}
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}
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/// <summary>
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/// 生成代码
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/// </summary>
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/// <param name="compilation"></param>
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/// <param name="classes"></param>
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/// <param name="context"></param>
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private static void GenerateCode(
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Compilation compilation,
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IEnumerable<ClassDeclarationSyntax> classes,
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SourceProductionContext context)
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{
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var processedTypes = new HashSet<ITypeSymbol>(SymbolEqualityComparer.Default);
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if (!classes.Any())
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{
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context.ReportDiagnostic(Diagnostic.Create(
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new DiagnosticDescriptor("GEN002", "没有目标类",
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"没有找到SourceAnalyzers标记的类", "Debug", DiagnosticSeverity.Warning, true),
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Location.None));
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}
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foreach (var classDecl in classes.Distinct())
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{
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var model = compilation.GetSemanticModel(classDecl.SyntaxTree);
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var classSymbol = model.GetDeclaredSymbol(classDecl) as INamedTypeSymbol;
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if (classSymbol == null || !processedTypes.Add(classSymbol))
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{
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context.ReportDiagnostic(Diagnostic.Create(
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new DiagnosticDescriptor("GEN003", "无效符号",
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$"类名称为{classDecl.Identifier.Text} 符号为空", "Error", DiagnosticSeverity.Error, true),
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Location.None));
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continue;
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}
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var code = BuildAccessorsForType(classSymbol, compilation, processedTypes);
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context.AddSource($"{classSymbol.Name}Extension.g.cs", code);
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var code3 = BuildAccessorsForSourceEntity(classSymbol, compilation, processedTypes);
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context.AddSource($"{classSymbol.Name}Accessor.g.cs", code3);
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}
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// 生成工厂注册代码
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context.AddSource("SourceEntityAccessorFactory.g.cs", BuildFactoryCode());
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}
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/// <summary>
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/// 构建类的属性访问器代码
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/// </summary>
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/// <param name="classSymbol"></param>
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/// <param name="compilation"></param>
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/// <param name="processedTypes"></param>
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/// <returns></returns>
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private static string BuildAccessorsForType(
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INamedTypeSymbol classSymbol,
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Compilation compilation,
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HashSet<ITypeSymbol> processedTypes)
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{
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var code = new StringBuilder();
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code.AppendLine("#pragma warning disable CS0419 // 禁用警告");
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code.AppendLine("// Generated code for " + classSymbol.Name);
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code.AppendLine("// <auto-generated/>");
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code.AppendLine("#nullable enable");
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code.AppendLine($"namespace {classSymbol.ContainingNamespace.ToDisplayString()};");
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code.AppendLine();
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code.AppendLine($"public static class {classSymbol.Name}Extension{GetGenericParams(classSymbol)}");
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code.AppendLine("{");
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foreach (var prop in GetAllPropertiesInHierarchy(classSymbol))
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{
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if (prop.IsIndexer) continue;
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GeneratePropertyAccessorsForType(prop, code, compilation, processedTypes);
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}
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code.AppendLine("}");
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return code.ToString();
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}
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/// <summary>
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/// 获取泛型参数
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/// </summary>
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/// <param name="symbol"></param>
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/// <returns></returns>
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public static string GetGenericParams(INamedTypeSymbol symbol)
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{
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if (!symbol.IsGenericType) return "";
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var parameters = symbol.TypeParameters.Select(t => t.Name);
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return $"<{string.Join(", ", parameters)}>";
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}
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/// <summary>
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/// 生成属性访问器代码
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/// </summary>
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/// <param name="prop"></param>
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/// <param name="code"></param>
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/// <param name="compilation"></param>
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/// <param name="processedTypes"></param>
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private static void GeneratePropertyAccessorsForType(
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IPropertySymbol prop,
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StringBuilder code,
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Compilation compilation,
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HashSet<ITypeSymbol> processedTypes)
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{
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// 安全类型转换
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if (prop.Type is not ITypeSymbol propType) return;
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code.AppendLine($" // Processing property: {prop.Name}");
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// 处理元组类型
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if (propType is INamedTypeSymbol { IsTupleType: true } tupleType)
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{
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GenerateTupleAccessorsForType(prop, tupleType, code);
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}
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else if (propType is INamedTypeSymbol namedType)
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{
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GenerateStandardAccessorsForType(prop, namedType, code);
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ProcessNestedType(namedType, compilation, processedTypes);
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}
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}
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/// <summary>
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/// 处理元组类型
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/// </summary>
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/// <param name="prop"></param>
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/// <param name="tupleType"></param>
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/// <param name="code"></param>
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private static void GenerateTupleAccessorsForType(IPropertySymbol prop, INamedTypeSymbol tupleType, StringBuilder code)
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{
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var elements = tupleType.TupleElements;
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var parentType = prop.ContainingType.ToDisplayString();
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for (int i = 0; i < elements.Length; i++)
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{
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var element = elements[i];
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if (element.Type is not ITypeSymbol elementType) continue;
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var elementName = element.CorrespondingTupleField?.Name ?? $"Item{i + 1}";
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code.AppendLine($" public static {elementType.ToDisplayString()} Get{prop.Name}_{elementName}({parentType} obj) => obj.{prop.Name}.{elementName};");
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if (prop.SetMethod != null)
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{
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var assignments = elements.Select((e, idx) =>
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idx == i ? "value" : $"obj.{prop.Name}.{e.Name}");
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code.AppendLine($" public static void Set{prop.Name}_{elementName}({parentType} obj, {elementType.ToDisplayString()} value) => obj.{prop.Name} = ({string.Join(", ", assignments)});");
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}
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}
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}
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/// <summary>
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/// 生成标准属性的访问器
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/// </summary>
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/// <param name="prop"></param>
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/// <param name="propType"></param>
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/// <param name="code"></param>
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private static void GenerateStandardAccessorsForType(IPropertySymbol prop, INamedTypeSymbol propType, StringBuilder code)
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{
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var parentType = prop.ContainingType.ToDisplayString();
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code.AppendLine($" public static {propType.ToDisplayString()} Get{prop.Name}({parentType} obj) => obj.{prop.Name};");
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if (prop.SetMethod != null)
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{
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code.AppendLine($" public static void Set{prop.Name}({parentType} obj, {propType.ToDisplayString()} value) => obj.{prop.Name} = value;");
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}
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}
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/// <summary>
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/// 处理嵌套类型
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/// </summary>
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/// <param name="typeSymbol"></param>
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/// <param name="compilation"></param>
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/// <param name="processedTypes"></param>
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private static void ProcessNestedType(ITypeSymbol typeSymbol, Compilation compilation, HashSet<ITypeSymbol> processedTypes)
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{
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if (typeSymbol is not INamedTypeSymbol namedType) return;
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if (!ShouldProcessNestedType(namedType)) return;
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if (!processedTypes.Add(namedType)) return;
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var code = BuildAccessorsForType(namedType, compilation, processedTypes);
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}
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/// <summary>
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/// 处理嵌套类型
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/// </summary>
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/// <param name="symbol"></param>
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/// <returns></returns>
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private static bool ShouldProcessNestedType(INamedTypeSymbol symbol)
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{
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return symbol.DeclaredAccessibility == Accessibility.Public &&
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!symbol.IsTupleType &&
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!symbol.IsAnonymousType &&
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!symbol.IsImplicitlyDeclared &&
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!symbol.Name.StartsWith("<");
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}
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/// <summary>
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/// 生成扩展类工厂代码
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/// </summary>
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/// <returns></returns>
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private static string BuildFactoryCode()
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{
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return """
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using System;
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using System.Collections.Concurrent;
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namespace JiShe.CollectBus.Analyzers.Shared;
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public static class SourceEntityAccessorFactory
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{
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private static readonly ConcurrentDictionary<Type, object> _accessors = new();
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public static ISourceEntityAccessor<T> GetAccessor<T>()
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{
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if (!_accessors.TryGetValue(typeof(T), out var accessor))
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{
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accessor = Activator.CreateInstance(
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Type.GetType($"{typeof(T).Namespace}.{typeof(T).Name}Accessor")!)!;
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_accessors.TryAdd(typeof(T), accessor);
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}
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return (ISourceEntityAccessor<T>)accessor!;
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}
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}
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""";
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}
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/// <summary>
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/// 构建实体类的源属性访问器代码
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/// </summary>
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/// <param name="classSymbol"></param>
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/// <param name="compilation"></param>
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/// <param name="processedTypes"></param>
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/// <returns></returns>
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private static string BuildAccessorsForSourceEntity(
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INamedTypeSymbol classSymbol,
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Compilation compilation,
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HashSet<ITypeSymbol> processedTypes)
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{
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var code = new StringBuilder();
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code.AppendLine("#pragma warning disable CS0419 // 禁用警告");
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code.AppendLine("// Generated code for " + classSymbol.Name);
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code.AppendLine("// <auto-generated/>");
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code.AppendLine("#nullable enable");
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code.AppendLine("using System;");
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code.AppendLine("using JiShe.CollectBus.Analyzers.Shared;");
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code.AppendLine($"namespace {classSymbol.ContainingNamespace.ToDisplayString()};");
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code.AppendLine();
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code.AppendLine($"public sealed class {classSymbol.Name}Accessor : ISourceEntityAccessor<{classSymbol.Name}>");
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code.AppendLine("{");
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GetGeneratePropertyValueForSourceEntity(GetAllPropertiesInHierarchy(classSymbol), code, compilation, classSymbol);
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SetGeneratePropertyValueForSourceEntity(GetAllPropertiesInHierarchy(classSymbol), code, compilation, classSymbol);
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code.AppendLine("}");
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return code.ToString();
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}
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private static void GetGeneratePropertyValueForSourceEntity(IEnumerable<IPropertySymbol> propList,
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StringBuilder code,
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Compilation compilation,
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INamedTypeSymbol classSymbol)
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{
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code.AppendLine($" public object GetPropertyValue({classSymbol.Name} targetEntity, string propertyName)");
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code.AppendLine(" {");
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code.AppendLine(" return propertyName switch");
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code.AppendLine(" {");
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// 遍历所有属性
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foreach (var property in propList)
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{
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// 安全类型转换
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if (property.Type is not ITypeSymbol propType) continue;
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// 处理元组类型
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if (propType is INamedTypeSymbol { IsTupleType: true } tupleType)
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{
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}
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else if (propType is INamedTypeSymbol namedType)
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{
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// 生成属性访问的
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code.AppendLine($" \"{property.Name}\" => {classSymbol.Name}Extension.Get{property.Name}(targetEntity),");
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}
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}
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code.AppendLine(" _ => throw new ArgumentException($\"Unknown property: {propertyName}\")");
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code.AppendLine(" };");
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code.AppendLine(" }");
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}
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private static void SetGeneratePropertyValueForSourceEntity(IEnumerable<IPropertySymbol> propList,
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StringBuilder code,
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Compilation compilation,
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INamedTypeSymbol classSymbol)
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{
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code.AppendLine($" public void SetPropertyValue({classSymbol.Name} targetEntity, string propertyName, object value)");
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code.AppendLine(" {");
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code.AppendLine(" return propertyName switch");
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code.AppendLine(" {");
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// 遍历所有属性
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foreach (var property in propList)
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{
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// 安全类型转换
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if (property.Type is not ITypeSymbol propType) continue;
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// 处理元组类型
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if (propType is INamedTypeSymbol { IsTupleType: true } tupleType)
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{
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}
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else if (propType is INamedTypeSymbol namedType)
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{
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// 生成属性设置赋值
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code.AppendLine($" \"{property.Name}\" => {classSymbol.Name}Extension.Set{property.Name}(targetEntity,({namedType.ToDisplayString()})value),");
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}
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}
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code.AppendLine(" _ => throw new ArgumentException($\"Unknown property: {propertyName}\")");
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code.AppendLine(" };");
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code.AppendLine(" }");
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}
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/// <summary>
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/// 处理元组类型
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/// </summary>
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/// <param name="prop"></param>
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/// <param name="tupleType"></param>
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/// <param name="code"></param>
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private static void GenerateTupleAccessorsForSourceEntity(IPropertySymbol prop, INamedTypeSymbol tupleType, StringBuilder code)
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{
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var elements = tupleType.TupleElements;
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var parentType = prop.ContainingType.ToDisplayString();
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for (int i = 0; i < elements.Length; i++)
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{
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var element = elements[i];
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if (element.Type is not ITypeSymbol elementType) continue;
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var elementName = element.CorrespondingTupleField?.Name ?? $"Item{i + 1}";
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code.AppendLine($" public static {elementType.ToDisplayString()} Get{prop.Name}_{elementName}({parentType} obj) => obj.{prop.Name}.{elementName};");
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if (prop.SetMethod != null)
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{
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var assignments = elements.Select((e, idx) =>
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idx == i ? "value" : $"obj.{prop.Name}.{e.Name}");
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code.AppendLine($" public static void Set{prop.Name}_{elementName}({parentType} obj, {elementType.ToDisplayString()} value) => obj.{prop.Name} = ({string.Join(", ", assignments)});");
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}
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}
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}
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/// <summary>
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/// 生成标准属性的访问器
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/// </summary>
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/// <param name="prop"></param>
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/// <param name="propType"></param>
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/// <param name="code"></param>
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private static void GenerateStandardAccessorsForSourceEntity(IPropertySymbol prop, INamedTypeSymbol propType, StringBuilder code)
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{
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var parentType = prop.ContainingType.ToDisplayString();
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code.AppendLine($" public object {propType.ToDisplayString()} Get{prop.Name}({parentType} obj) => obj.{prop.Name};");
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if (prop.SetMethod != null)
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{
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code.AppendLine($" public static void Set{prop.Name}({parentType} obj, {propType.ToDisplayString()} value) => obj.{prop.Name} = value;");
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}
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}
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}
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} |