// Copyright Keysight Technologies 2012-2019
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, you can obtain one at http://mozilla.org/MPL/2.0/.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace OpenTap
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{
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/// <summary>
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/// Base type for all OpenTAP plugins.
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/// </summary>
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public interface ITapPlugin { }
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/// <summary>
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/// Extension class for Type.
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/// </summary>
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public static class TapPluginExtensions
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{
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static void _getPluginType(HashSet<Type> foundPluginTypes, Type typeToCheck)
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{
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if (foundPluginTypes.Contains(typeToCheck))
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return; // Type already checked.
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IEnumerable<Type> other = typeToCheck.GetInterfaces();
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if (other.Contains(typeof(ITapPlugin)) == false)
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return;
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if (typeToCheck.BaseType != null)
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other = other.Append(typeToCheck.BaseType);
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var otherType = other.Where(x => x != typeof(ITapPlugin) && x.HasInterface<ITapPlugin>());
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if (otherType.Any() == false) {
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foundPluginTypes.Add(typeToCheck);
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return;
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}
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foreach(var t in otherType)
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{ // Recurse to check sub types.
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_getPluginType(foundPluginTypes, t);
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}
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}
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/// <summary>
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/// Gets the plugin types that a type implements.
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/// </summary>
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/// <param name="type"></param>
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/// <returns></returns>
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public static Type[] GetPluginType(this Type type)
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{
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if (type == null)
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throw new ArgumentNullException("type");
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var outTypes = new HashSet<Type>();
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_getPluginType(outTypes, type);
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return outTypes.ToArray();
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}
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}
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}
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