99 lines
4 KiB
C#
99 lines
4 KiB
C#
// Copyright 2016-2019, Pulumi Corporation
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using System;
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using System.Collections.Immutable;
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using System.Linq;
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using System.Reflection;
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using System.Text.Json;
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using System.Threading.Tasks;
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namespace Pulumi.Serialization
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{
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internal interface IOutputCompletionSource
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{
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Type TargetType { get; }
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IOutput Output { get; }
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void TrySetException(Exception exception);
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void TrySetDefaultResult(bool isKnown);
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void SetStringValue(string value, bool isKnown);
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void SetValue(OutputData<object?> data);
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}
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internal class OutputCompletionSource<T> : IOutputCompletionSource
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{
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private readonly TaskCompletionSource<OutputData<T>> _taskCompletionSource;
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public readonly Output<T> Output;
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public OutputCompletionSource(Resource? resource)
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{
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_taskCompletionSource = new TaskCompletionSource<OutputData<T>>();
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Output = new Output<T>(
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resource == null ? ImmutableHashSet<Resource>.Empty : ImmutableHashSet.Create(resource),
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_taskCompletionSource.Task);
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}
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public System.Type TargetType => typeof(T);
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IOutput IOutputCompletionSource.Output => Output;
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public void SetStringValue(string value, bool isKnown)
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=> _taskCompletionSource.SetResult(new OutputData<T>((T)(object)value, isKnown, isSecret: false));
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public void SetValue(OutputData<object?> data)
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=> _taskCompletionSource.SetResult(new OutputData<T>((T)data.Value!, data.IsKnown, data.IsSecret));
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public void TrySetDefaultResult(bool isKnown)
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=> _taskCompletionSource.TrySetResult(new OutputData<T>(default!, isKnown, isSecret: false));
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public void TrySetException(Exception exception)
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=> _taskCompletionSource.TrySetException(exception);
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}
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internal static class OutputCompletionSource
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{
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public static ImmutableDictionary<string, IOutputCompletionSource> GetSources(Resource resource)
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{
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var name = resource.GetResourceName();
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var type = resource.GetResourceType();
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var query = from property in resource.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance)
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let attr = property.GetCustomAttribute<OutputAttribute>()
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where attr != null
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select (property, attr);
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var result = ImmutableDictionary.CreateBuilder<string, IOutputCompletionSource>();
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foreach (var (prop, attr) in query.ToList())
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{
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var propType = prop.PropertyType;
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var propFullName = $"[Output] {resource.GetType().FullName}.{prop.Name}";
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if (!propType.IsConstructedGenericType &&
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propType.GetGenericTypeDefinition() != typeof(Output<>))
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{
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throw new InvalidOperationException($"{propFullName} was not an Output<T>");
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}
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var setMethod = prop.DeclaringType!.GetMethod("set_" + prop.Name, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
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if (setMethod == null)
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{
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throw new InvalidOperationException($"{propFullName} did not have a 'set' method");
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}
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var outputTypeArg = propType.GenericTypeArguments.Single();
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Converter.CheckTargetType(propFullName, outputTypeArg);
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var ocsType = typeof(OutputCompletionSource<>).MakeGenericType(outputTypeArg);
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var ocsContructor = ocsType.GetConstructors().Single();
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var completionSource = (IOutputCompletionSource)ocsContructor.Invoke(new[] { resource });
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setMethod.Invoke(resource, new[] { completionSource.Output });
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result.Add(attr.Name, completionSource);
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}
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Log.Debug("Fields to assign: " + JsonSerializer.Serialize(result.Keys), resource);
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return result.ToImmutable();
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}
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}
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}
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