56 lines
2 KiB
C#
56 lines
2 KiB
C#
/*
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* This file is part of the LibreOffice project.
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*
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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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*/
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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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using System.Reflection;
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namespace com.sun.star.uno.helper
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{
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internal static class StructHelper
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{
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private static Dictionary<Type, (Func<object[], object>, Type[])> _ctorCache;
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private static Dictionary<Type, (Action<object, object[]>, Type[])> _dtorCache;
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static StructHelper()
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{
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_ctorCache = new Dictionary<Type, (Func<object[], object>, Type[])>();
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_dtorCache = new Dictionary<Type, (Action<object, object[]>, Type[])>();
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}
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public static (Func<object[], object>, Type[]) GetConstructor(Type type)
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{
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if (_ctorCache.TryGetValue(type, out (Func<object[], object>, Type[]) cached))
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return cached;
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ConstructorInfo ctor = type.GetConstructors().First(c => c.GetParameters().Length > 0);
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Func<object[], object> func = args => ctor.Invoke(args);
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Type[] paramTypes = ctor.GetParameters()
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.Select(p => TypeHelper.RemoveReference(p.ParameterType))
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.ToArray();
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return _ctorCache[type] = (func, paramTypes);
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}
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public static (Action<object, object[]>, Type[]) GetDeconstructor(Type type)
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{
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if (_dtorCache.TryGetValue(type, out (Action<object, object[]>, Type[]) cached))
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return cached;
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MethodInfo dtor = type.GetMethod("Deconstruct", BindingFlags.Instance | BindingFlags.Public);
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Action<object, object[]> action = (target, args) => dtor.Invoke(target, args);
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Type[] paramTypes = dtor.GetParameters()
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.Select(p => TypeHelper.RemoveReference(p.ParameterType))
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.ToArray();
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return _dtorCache[type] = (action, paramTypes);
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}
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}
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}
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