Masterly.Specification 2.0.0

.NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. 
dotnet add package Masterly.Specification --version 2.0.0
                    


                    

                
NuGet\Install-Package Masterly.Specification -Version 2.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Masterly.Specification" Version="2.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Masterly.Specification" Version="2.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Masterly.Specification" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Masterly.Specification --version 2.0.0
                    


                    

                
#r "nuget: Masterly.Specification, 2.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Masterly.Specification@2.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Masterly.Specification&version=2.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Masterly.Specification&version=2.0.0
                    


                            Install as a Cake Tool

Masterly.Specification

Specification Pattern is used to define named, reusable, combinable and testable filters for entities and other business objects.

For more details, please take a look on the documentation on Github.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last Updated
2.0.0 105 1/8/2026
1.0.0 682 12/9/2021

# What's New

## Added

### Advanced Logic Operators
- **XOR Specification** (`Xor()`) - Returns true when exactly one specification is satisfied
- **Implies Specification** (`Implies()`) - Material implication (A → B), returns false only when A is true and B is false
- **Iff Specification** (`Iff()`) - Biconditional/equivalence, returns true when both have same truth value
- **NAND Specification** (`Nand()`) - Returns true unless both specifications are true
- **NOR Specification** (`Nor()`) - Returns true only when both specifications are false

### N-ary Composition
- **`Specifications.All()`** - All specifications must be satisfied (N-ary AND)
- **`Specifications.AnyOf()`** - At least one specification must be satisfied (N-ary OR)
- **`Specifications.Exactly(n)`** - Exactly N specifications must be satisfied
- **`Specifications.AtLeast(n)`** - At least N specifications must be satisfied
- **`Specifications.AtMost(n)`** - At most N specifications must be satisfied
- **`Specifications.NoneOf()`** - None of the specifications should be satisfied

### Fluent Builder
- **`Spec.For<T>()`** - Start building a specification with fluent API
- **`Spec.Where<T>()`** - Create a simple specification from expression
- **`Spec.Any<T>()`** - Factory method for always-true specification
- **`Spec.None<T>()`** - Factory method for always-false specification
- **`SpecificationBuilder<T>`** - Fluent builder with `Where()`, `And()`, `Or()`, `AndNot()`, `Not()`, `Xor()`, `Group()`, `OrGroup()`, and `Build()` methods

### Property-Based Specifications
- **`Property<T>.For()`** - Create type-safe specifications for entity properties
- **Comparison operators**: `EqualTo()`, `NotEqualTo()`, `GreaterThan()`, `LessThan()`, `GreaterThanOrEqual()`, `LessThanOrEqual()`
- **Range operators**: `InRange()`, `In()`, `NotIn()`
- **Null checks**: `IsNull()`, `IsNotNull()`
- **String operations**: `StartsWith()`, `EndsWith()`, `Contains()`, `IsNullOrEmpty()`, `HasContent()`, `HasLengthBetween()`
- **Custom predicates**: `Matches()`

### Temporal Specifications
- **`Temporal<T>.For()`** - Create specifications for DateTime properties
- **Date comparisons**: `Before()`, `After()`, `Between()`
- **Calendar filtering**: `InYear()`, `InMonth()`, `OnDayOfWeek()`, `OnWeekend()`, `OnWeekday()`
- **Time filtering**: `TimeBetween()`
- **Nullable support**: `HasValue()`, `IsNull()`

### Pipeline & Conditional
- **`OnlyWhen()`** - Apply specification only when condition is true
- **`SkipWhen()`** - Skip specification when condition is true
- **`Chain()`** - Chain multiple specifications together
- **`AsOptional()`** - Handle nullable specifications gracefully
- **`ConditionalSpecification<T>`** - Apply different specs based on entity predicate
- **`PipelineExtensions.When().Otherwise()`** - Fluent conditional builder
- **`OtherwisePass()`** - Pass all when condition not met
- **`OtherwiseFail()`** - Fail all when condition not met
- **`OrElse()`** - Short-circuit OR evaluation
- **`AndThen()`** - Short-circuit AND evaluation

### Diagnostics & Explanation
- **`Explain()`** - Generate human-readable specification description
- **`Evaluate()`** - Get detailed evaluation results with pass/fail information
- **`GetDetailedResult()`** - Get formatted output with all condition results
- **`EvaluationResult`** - Result class with `IsSatisfied`, `Summary`, `GetPassedConditions()`, `GetFailureReasons()`

### Performance & Caching
- **`Cached()`** - Cache compiled expression for repeated evaluations
- **`Compile()`** - Get compiled delegate for maximum performance
- **`Memoized()`** - Cache evaluation results per entity instance
- **`CachedSpecification<T>`** - Specification wrapper with `CompiledPredicate` property

## Changed

- Extended `SpecificationExtensions` with advanced logic operators
- Improved expression tree handling for all composite specifications

## Infrastructure

- Added comprehensive unit tests for all new features (101 tests)
- Updated test project to use xUnit.v3 and Shouldly
- Updated to .NET 9.0 for test project
- Added GlobalUsings.cs for test namespace imports