98 lines
3.4 KiB
C#
98 lines
3.4 KiB
C#
#region Apache License 2.0
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/*
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Nuclex .NET Framework
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Copyright (C) 2002-2024 Markus Ewald / Nuclex Development Labs
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#endregion // Apache License 2.0
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using System;
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using System.Runtime.Serialization;
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namespace Nuclex.Support {
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/// <summary>
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/// Type-safe weak reference, referencing an object while still allowing
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/// that object to be garbage collected.
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/// </summary>
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#if !NO_SERIALIZATION
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[Serializable]
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#endif
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public class WeakReference<TReferenced> : WeakReference
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where TReferenced : class {
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/// <summary>
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/// Initializes a new instance of the WeakReference class, referencing
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/// the specified object.
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/// </summary>
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/// <param name="target">The object to track or null.</param>
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public WeakReference(TReferenced target) :
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base(target) { }
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/// <summary>
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/// Initializes a new instance of the WeakReference class, referencing
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/// the specified object optionally using resurrection tracking.
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/// </summary>
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/// <param name="target">An object to track.</param>
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/// <param name="trackResurrection">
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/// Indicates when to stop tracking the object. If true, the object is tracked
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/// after finalization; if false, the object is only tracked until finalization.
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/// </param>
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public WeakReference(TReferenced target, bool trackResurrection) :
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base(target, trackResurrection) { }
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#if !NO_SERIALIZATION
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/// <summary>
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/// Initializes a new instance of the WeakReference class, using deserialized
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/// data from the specified serialization and stream objects.
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/// </summary>
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/// <param name="info">
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/// An object that holds all the data needed to serialize or deserialize the
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/// current System.WeakReference object.
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/// </param>
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/// <param name="context">
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/// (Reserved) Describes the source and destination of the serialized stream
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/// specified by info.
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/// </param>
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/// <exception cref="System.ArgumentNullException">
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/// The info parameter is null.
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/// </exception>
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protected WeakReference(SerializationInfo info, StreamingContext context) :
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base(info, context) { }
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#endif // !NO_SERIALIZATION
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/// <summary>
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/// Gets or sets the object (the target) referenced by the current WeakReference
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/// object.
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/// </summary>
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/// <remarks>
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/// Is null if the object referenced by the current System.WeakReference object
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/// has been garbage collected; otherwise, a reference to the object referenced
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/// by the current System.WeakReference object.
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/// </remarks>
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/// <exception cref="System.InvalidOperationException">
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/// The reference to the target object is invalid. This can occur if the current
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/// System.WeakReference object has been finalized
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/// </exception>
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public new TReferenced Target {
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get { return (base.Target as TReferenced); }
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set { base.Target = value; }
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}
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}
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} // namespace Nuclex.Support
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