GitHub Viewer
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using Microsoft.ClearScript.Util;
namespace Microsoft.ClearScript
{
internal sealed class ExtensionMethodTable
{
private readonly Dictionary table = new Dictionary();
public ExtensionMethodSummary Summary { get; private set; } = new ExtensionMethodSummary();
public bool ProcessType(Type type, Type accessContext, ScriptAccess defaultAccess)
{
Debug.Assert(type.IsSpecific());
if (!table.ContainsKey(type) && type.HasExtensionMethods())
{
const BindingFlags bindFlags = BindingFlags.Public | BindingFlags.Static;
table[type] = type.GetMethods(bindFlags).Where(method => IsScriptableExtensionMethod(method, accessContext, defaultAccess)).ToArray();
RebuildSummary();
return true;
}
return false;
}
public void RebuildSummary()
{
Summary = new ExtensionMethodSummary(table);
}
private static bool IsScriptableExtensionMethod(MethodInfo method, Type accessContext, ScriptAccess defaultAccess)
{
return method.IsScriptable(accessContext, defaultAccess) && method.IsDefined(typeof(ExtensionAttribute), false);
}
}
internal sealed class ExtensionMethodSummary
{
public ExtensionMethodSummary()
{
Types = ArrayHelpers.GetEmptyArray();
Methods = ArrayHelpers.GetEmptyArray();
MethodNames = ArrayHelpers.GetEmptyArray();
}
public ExtensionMethodSummary(Dictionary table)
{
Types = table.Keys.ToArray();
Methods = table.SelectMany(pair => pair.Value).ToArray();
MethodNames = Methods.Select(method => method.GetScriptName()).ToArray();
}
public Type[] Types { get; }
public MethodInfo[] Methods { get; }
public string[] MethodNames { get; }
}
}