/
CustomLifestyle.cs
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/
CustomLifestyle.cs
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#region Copyright Simple Injector Contributors
/* The Simple Injector is an easy-to-use Inversion of Control library for .NET
*
* Copyright (c) 2013-2016 Simple Injector Contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
* EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#endregion
namespace SimpleInjector.Lifestyles
{
using System;
using System.Linq.Expressions;
internal sealed class CustomLifestyle : Lifestyle
{
private readonly CreateLifestyleApplier lifestyleApplierFactory;
public CustomLifestyle(string name, CreateLifestyleApplier lifestyleApplierFactory)
: base(name)
{
this.lifestyleApplierFactory = lifestyleApplierFactory;
}
public override int Length
{
get { throw new NotSupportedException("The length property is not supported for this lifestyle."); }
}
// Ensure that this lifestyle can only be safely used with singleton dependencies.
internal override int ComponentLength(Container container) => Singleton.ComponentLength(container);
// Ensure that this lifestyle can only be safely used with transient components/consumers.
internal override int DependencyLength(Container container) => Transient.DependencyLength(container);
protected internal override Registration CreateRegistrationCore<TConcrete>(Container container)
{
return new CustomRegistration<TConcrete>(this.lifestyleApplierFactory, this, container);
}
protected internal override Registration CreateRegistrationCore<TService>(Func<TService> instanceCreator,
Container container)
{
Requires.IsNotNull(instanceCreator, nameof(instanceCreator));
return new CustomRegistration<TService>(this.lifestyleApplierFactory, this, container, instanceCreator);
}
private sealed class CustomRegistration<TImplementation> : Registration where TImplementation : class
{
private readonly CreateLifestyleApplier lifestyleApplierFactory;
private readonly Func<TImplementation> instanceCreator;
public CustomRegistration(CreateLifestyleApplier lifestyleApplierFactory, Lifestyle lifestyle,
Container container, Func<TImplementation> instanceCreator = null)
: base(lifestyle, container)
{
this.lifestyleApplierFactory = lifestyleApplierFactory;
this.instanceCreator = instanceCreator;
}
public override Type ImplementationType => typeof(TImplementation);
public override Expression BuildExpression() =>
Expression.Convert(
Expression.Invoke(
Expression.Constant(this.CreateInstanceCreator())),
typeof(TImplementation));
private Func<object> CreateInstanceCreator()
{
Func<TImplementation> transientInstanceCreator =
this.instanceCreator == null
? (Func<TImplementation>)this.BuildTransientDelegate()
: this.BuildTransientDelegate(this.instanceCreator);
return this.lifestyleApplierFactory(() => transientInstanceCreator());
}
}
}
}