/// <summary>
/// Links specification with or condition.
/// </summary>
/// <param name="specification">Specification.</param>
/// <returns>Specification <see cref="SpecificationBase{T}"/>.</returns>
public SpecificationBase <T> Or(SpecificationBase <T> specification)
{
if (this == All || specification == All)
{
return(All);
}
return(new OrSpecification <T>(this, specification));
}
/// <summary>
/// Links specification with and condition.
/// </summary>
/// <param name="specification">Specification.</param>
/// <returns>Specification <see cref="SpecificationBase{T}"/>.</returns>
public SpecificationBase <T> And(SpecificationBase <T> specification)
{
if (this == All)
{
return(specification);
}
return(specification == All
? this
: new AndSpecification <T>(this, specification));
}
/// <summary>
/// Filters a sequence of values based on <paramref name="specification"/>.
/// </summary>
/// <typeparam name="TSource">Type.</typeparam>
/// <param name="source">Sequence.</param>
/// <param name="specification">Specification.</param>
/// <returns>An <see cref="IQueryable"/>.</returns>
public static IQueryable <TSource> Where <TSource>(
this IQueryable <TSource> source, SpecificationBase <TSource> specification)
{
return(source.Where(specification.ToExpression()));
}
/// <summary>
/// Initializes a new instance of the <see cref="OrSpecification{T}"/> class.
/// </summary>
/// <param name="left">Left specification.</param>
/// <param name="right">Right specification.</param>
public OrSpecification(SpecificationBase <T> left, SpecificationBase <T> right)
{
_left = left ?? throw new ArgumentNullException(nameof(left));
_right = right ?? throw new ArgumentNullException(nameof(right));
}
/// <summary>
/// Initializes a new instance of the <see cref="NotSpecification{T}"/> class.
/// </summary>
/// <param name="specification">Specification.</param>
public NotSpecification(SpecificationBase <T> specification)
{
_specification = specification;
}
