83 lines
2.1 KiB
C#
83 lines
2.1 KiB
C#
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/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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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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namespace dndbg.Engine {
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sealed class DebuggerCollection<TKey, TValue> where TKey : class where TValue : class {
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readonly Dictionary<TKey, TValue> dict = new Dictionary<TKey, TValue>();
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readonly Func<TKey, TValue> createValue;
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public int Count => dict.Count;
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public DebuggerCollection(Func<TKey, TValue> createValue) => this.createValue = createValue;
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/// <summary>
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/// Tries to get an existing item. Returns null if it doesn't exist.
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/// </summary>
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/// <param name="key">Key</param>
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/// <returns></returns>
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public TValue? TryGet(TKey? key) {
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if (key is null)
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return null;
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dict.TryGetValue(key, out var value);
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return value;
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}
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/// <summary>
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/// Adds a new item. If it already exists, the old one is returned.
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/// </summary>
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/// <param name="key">Key</param>
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/// <returns></returns>
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public TValue? Add(TKey? key) {
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if (key is null)
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return null;
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var value = TryGet(key);
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if (value is not null)
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return value;
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var createdValue = createValue(key);
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dict.Add(key, createdValue);
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return createdValue;
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}
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/// <summary>
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/// Removes the item
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/// </summary>
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/// <param name="key">Key</param>
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public bool Remove(TKey? key) {
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if (key is null)
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return false;
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return dict.Remove(key);
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}
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/// <summary>
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/// Gets all items
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/// </summary>
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/// <returns></returns>
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public TValue[] GetAll() => dict.Values.ToArray();
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}
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}
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