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Clean some code and add IOperationProcessor
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106 changes: 106 additions & 0 deletions
106
src/Microsoft.Restier.Core/Conventions/ConventionBasedOperationProcessor.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT License. See License.txt in the project root for license information. | ||
|
|
||
| using System; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Extensions.DependencyInjection; | ||
| using Microsoft.Restier.Core.Operation; | ||
|
|
||
| namespace Microsoft.Restier.Core.Conventions | ||
| { | ||
| /// <summary> | ||
| /// A convention-based change set item filter. | ||
| /// </summary> | ||
| internal class ConventionBasedOperationProcessor : IOperationProcessor | ||
| { | ||
| private Type targetType; | ||
|
|
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| private ConventionBasedOperationProcessor(Type targetType) | ||
| { | ||
| Ensure.NotNull(targetType, "targetType"); | ||
| this.targetType = targetType; | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public static void ApplyTo( | ||
| IServiceCollection services, | ||
| Type targetType) | ||
| { | ||
| Ensure.NotNull(services, "services"); | ||
| Ensure.NotNull(targetType, "targetType"); | ||
| services.AddService<IOperationProcessor>( | ||
| (sp, next) => new ConventionBasedOperationProcessor(targetType)); | ||
| } | ||
|
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||
| /// <inheritdoc/> | ||
| public Task OnExecutingOperationAsync( | ||
| OperationContext context, | ||
| CancellationToken cancellationToken) | ||
| { | ||
| return this.InvokeProcessorMethodAsync( | ||
| context, ConventionBasedChangeSetConstants.FilterMethodNamePreFilterSuffix); | ||
| } | ||
|
|
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| /// <inheritdoc/> | ||
| public Task OnExecutedOperationAsync( | ||
| OperationContext context, | ||
| CancellationToken cancellationToken) | ||
| { | ||
| return this.InvokeProcessorMethodAsync( | ||
| context, ConventionBasedChangeSetConstants.FilterMethodNamePostFilterSuffix); | ||
| } | ||
|
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| private static bool ParametersMatch(ParameterInfo[] methodParameters, object[] parameters) | ||
| { | ||
| return methodParameters.Length == parameters.Length | ||
| && !methodParameters.Where((mp, i) => !mp.ParameterType.IsInstanceOfType(parameters[i])).Any(); | ||
| } | ||
|
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| private Task InvokeProcessorMethodAsync( | ||
| OperationContext context, | ||
| string methodNameSuffix) | ||
| { | ||
| string methodName = ConventionBasedChangeSetConstants.FilterMethodActionInvocationExecute + | ||
| methodNameSuffix + context.OperationName; | ||
| object[] parameters = null; | ||
| if (context.ParametersValue != null) | ||
| { | ||
| context.ParametersValue.ToArray(); | ||
| } | ||
|
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| MethodInfo method = this.targetType.GetQualifiedMethod(methodName); | ||
|
|
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| if (method != null && | ||
| (method.ReturnType == typeof(void) || | ||
| typeof(Task).IsAssignableFrom(method.ReturnType))) | ||
| { | ||
| object target = null; | ||
| if (!method.IsStatic) | ||
| { | ||
| target = context.GetApiService<ApiBase>(); | ||
| if (target == null || | ||
| !this.targetType.IsInstanceOfType(target)) | ||
| { | ||
| return Task.WhenAll(); | ||
| } | ||
| } | ||
|
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| ParameterInfo[] methodParameters = method.GetParameters(); | ||
| if (ParametersMatch(methodParameters, parameters)) | ||
| { | ||
| object result = method.Invoke(target, parameters); | ||
| Task resultTask = result as Task; | ||
| if (resultTask != null) | ||
| { | ||
| return resultTask; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return Task.WhenAll(); | ||
| } | ||
| } | ||
| } |
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