286 lines
12 KiB
C#
286 lines
12 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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#if !NO_SETS
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using System;
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using System.Collections.Concurrent;
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namespace Nuclex.Support.Cloning {
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/// <summary>
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/// Cloning factory which uses expression trees to improve performance when cloning
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/// is a high-frequency action.
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/// </summary>
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public partial class ExpressionTreeCloner : ICloneFactory {
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/// <summary>Initializes the static members of the expression tree cloner</summary>
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static ExpressionTreeCloner() {
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shallowFieldBasedCloners = new ConcurrentDictionary<Type, Func<object, object>>();
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deepFieldBasedCloners = new ConcurrentDictionary<Type, Func<object, object>>();
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shallowPropertyBasedCloners = new ConcurrentDictionary<Type, Func<object, object>>();
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deepPropertyBasedCloners = new ConcurrentDictionary<Type, Func<object, object>>();
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}
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/// <summary>
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/// Creates a deep clone of the specified object, also creating clones of all
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/// child objects being referenced
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A deep clone of the provided object</returns>
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public static TCloned DeepFieldClone<TCloned>(TCloned objectToClone) {
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object objectToCloneAsObject = objectToClone;
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if(objectToCloneAsObject == null) {
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return default(TCloned);
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}
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Func<object, object> cloner = getOrCreateDeepFieldBasedCloner(typeof(TCloned));
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return (TCloned)cloner(objectToCloneAsObject);
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}
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/// <summary>
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/// Creates a deep clone of the specified object, also creating clones of all
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/// child objects being referenced
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A deep clone of the provided object</returns>
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public static TCloned DeepPropertyClone<TCloned>(TCloned objectToClone) {
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object objectToCloneAsObject = objectToClone;
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if(objectToCloneAsObject == null) {
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return default(TCloned);
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}
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Func<object, object> cloner = getOrCreateDeepPropertyBasedCloner(typeof(TCloned));
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return (TCloned)cloner(objectToCloneAsObject);
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}
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/// <summary>
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/// Creates a shallow clone of the specified object, reusing any referenced objects
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A shallow clone of the provided object</returns>
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public static TCloned ShallowFieldClone<TCloned>(TCloned objectToClone) {
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object objectToCloneAsObject = objectToClone;
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if(objectToCloneAsObject == null) {
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return default(TCloned);
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}
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Func<object, object> cloner = getOrCreateShallowFieldBasedCloner(typeof(TCloned));
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return (TCloned)cloner(objectToCloneAsObject);
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}
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/// <summary>
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/// Creates a shallow clone of the specified object, reusing any referenced objects
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A shallow clone of the provided object</returns>
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public static TCloned ShallowPropertyClone<TCloned>(TCloned objectToClone) {
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object objectToCloneAsObject = objectToClone;
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if(objectToCloneAsObject == null) {
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return default(TCloned);
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}
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Func<object, object> cloner = getOrCreateShallowPropertyBasedCloner(typeof(TCloned));
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return (TCloned)cloner(objectToCloneAsObject);
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}
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/// <summary>
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/// Creates a shallow clone of the specified object, reusing any referenced objects
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A shallow clone of the provided object</returns>
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TCloned ICloneFactory.ShallowFieldClone<TCloned>(TCloned objectToClone) {
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return ExpressionTreeCloner.ShallowFieldClone<TCloned>(objectToClone);
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}
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/// <summary>
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/// Creates a shallow clone of the specified object, reusing any referenced objects
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A shallow clone of the provided object</returns>
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TCloned ICloneFactory.ShallowPropertyClone<TCloned>(TCloned objectToClone) {
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return ExpressionTreeCloner.ShallowPropertyClone<TCloned>(objectToClone);
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}
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/// <summary>
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/// Creates a deep clone of the specified object, also creating clones of all
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/// child objects being referenced
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A deep clone of the provided object</returns>
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TCloned ICloneFactory.DeepFieldClone<TCloned>(TCloned objectToClone) {
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return ExpressionTreeCloner.DeepFieldClone<TCloned>(objectToClone);
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}
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/// <summary>
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/// Creates a deep clone of the specified object, also creating clones of all
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/// child objects being referenced
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/// </summary>
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/// <typeparam name="TCloned">Type of the object that will be cloned</typeparam>
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/// <param name="objectToClone">Object that will be cloned</param>
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/// <returns>A deep clone of the provided object</returns>
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TCloned ICloneFactory.DeepPropertyClone<TCloned>(TCloned objectToClone) {
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return ExpressionTreeCloner.DeepPropertyClone<TCloned>(objectToClone);
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}
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#if false
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/// <summary>
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/// Transfers the state of one object into another, creating clones of referenced objects
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/// </summary>
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/// <typeparam name="TState">Type of the object whose sate will be transferred</typeparam>
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/// <param name="original">Original instance the state will be taken from</param>
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/// <param name="target">Target instance the state will be written to</param>
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/// <param name="propertyBased">Whether to perform a property-based state copy</param>
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public void DeepCopyState<TState>(TState original, TState target, bool propertyBased)
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where TState : class {
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throw new NotImplementedException();
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}
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/// <summary>
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/// Transfers the state of one object into another, creating clones of referenced objects
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/// </summary>
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/// <typeparam name="TState">Type of the object whose sate will be transferred</typeparam>
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/// <param name="original">Original instance the state will be taken from</param>
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/// <param name="target">Target instance the state will be written to</param>
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/// <param name="propertyBased">Whether to perform a property-based state copy</param>
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public void DeepCopyState<TState>(ref TState original, ref TState target, bool propertyBased)
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where TState : struct {
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throw new NotImplementedException();
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}
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/// <summary>Transfers the state of one object into another</summary>
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/// <typeparam name="TState">Type of the object whose sate will be transferred</typeparam>
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/// <param name="original">Original instance the state will be taken from</param>
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/// <param name="target">Target instance the state will be written to</param>
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/// <param name="propertyBased">Whether to perform a property-based state copy</param>
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public void ShallowCopyState<TState>(TState original, TState target, bool propertyBased)
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where TState : class {
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throw new NotImplementedException();
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}
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/// <summary>Transfers the state of one object into another</summary>
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/// <typeparam name="TState">Type of the object whose sate will be transferred</typeparam>
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/// <param name="original">Original instance the state will be taken from</param>
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/// <param name="target">Target instance the state will be written to</param>
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/// <param name="propertyBased">Whether to perform a property-based state copy</param>
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public void ShallowCopyState<TState>(ref TState original, ref TState target, bool propertyBased)
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where TState : struct {
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throw new NotImplementedException();
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}
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#endif
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/// <summary>
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/// Retrieves the existing clone method for the specified type or compiles one if
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/// none exists for the type yet
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/// </summary>
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/// <param name="clonedType">Type for which a clone method will be retrieved</param>
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/// <returns>The clone method for the specified type</returns>
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private static Func<object, object> getOrCreateShallowFieldBasedCloner(Type clonedType) {
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Func<object, object> cloner;
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if(!shallowFieldBasedCloners.TryGetValue(clonedType, out cloner)) {
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cloner = createShallowFieldBasedCloner(clonedType);
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shallowFieldBasedCloners.TryAdd(clonedType, cloner);
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}
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return cloner;
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}
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/// <summary>
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/// Retrieves the existing clone method for the specified type or compiles one if
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/// none exists for the type yet
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/// </summary>
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/// <param name="clonedType">Type for which a clone method will be retrieved</param>
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/// <returns>The clone method for the specified type</returns>
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private static Func<object, object> getOrCreateDeepFieldBasedCloner(Type clonedType) {
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Func<object, object> cloner;
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if(!deepFieldBasedCloners.TryGetValue(clonedType, out cloner)) {
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cloner = createDeepFieldBasedCloner(clonedType);
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deepFieldBasedCloners.TryAdd(clonedType, cloner);
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}
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return cloner;
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}
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/// <summary>
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/// Retrieves the existing clone method for the specified type or compiles one if
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/// none exists for the type yet
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/// </summary>
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/// <param name="clonedType">Type for which a clone method will be retrieved</param>
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/// <returns>The clone method for the specified type</returns>
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private static Func<object, object> getOrCreateShallowPropertyBasedCloner(Type clonedType) {
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Func<object, object> cloner;
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if(!shallowPropertyBasedCloners.TryGetValue(clonedType, out cloner)) {
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cloner = createShallowPropertyBasedCloner(clonedType);
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shallowPropertyBasedCloners.TryAdd(clonedType, cloner);
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}
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return cloner;
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}
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/// <summary>
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/// Retrieves the existing clone method for the specified type or compiles one if
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/// none exists for the type yet
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/// </summary>
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/// <param name="clonedType">Type for which a clone method will be retrieved</param>
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/// <returns>The clone method for the specified type</returns>
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private static Func<object, object> getOrCreateDeepPropertyBasedCloner(Type clonedType) {
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Func<object, object> cloner;
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if(!deepPropertyBasedCloners.TryGetValue(clonedType, out cloner)) {
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cloner = createDeepPropertyBasedCloner(clonedType);
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deepPropertyBasedCloners.TryAdd(clonedType, cloner);
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}
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return cloner;
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}
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/// <summary>Compiled cloners that perform shallow clone operations</summary>
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private static readonly ConcurrentDictionary<
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Type, Func<object, object>
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> shallowFieldBasedCloners;
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/// <summary>Compiled cloners that perform deep clone operations</summary>
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private static readonly ConcurrentDictionary<
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Type, Func<object, object>
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> deepFieldBasedCloners;
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/// <summary>Compiled cloners that perform shallow clone operations</summary>
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private static readonly ConcurrentDictionary<
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Type, Func<object, object>
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> shallowPropertyBasedCloners;
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/// <summary>Compiled cloners that perform deep clone operations</summary>
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private static readonly ConcurrentDictionary<
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Type, Func<object, object>
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> deepPropertyBasedCloners;
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}
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} // namespace Nuclex.Support.Cloning
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#endif // !NO_SETS
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