/
SingleConstructorValidator.cs
40 lines (34 loc) · 1.25 KB
/
SingleConstructorValidator.cs
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using System.Collections.Generic;
using System.Linq;
using Mono.Cecil;
using Mono.Cecil.Rocks;
namespace Stratis.SmartContracts.CLR.Validation.Validators.Type
{
/// <summary>
/// Validates that a <see cref="Mono.Cecil.TypeDefinition"/> contains only a single constructor
/// </summary>
public class SingleConstructorValidator : ITypeDefinitionValidator
{
public const string MissingConstructorError = "Contract must define a constructor";
public const string SingleConstructorError = "Only a single constructor is allowed";
public IEnumerable<ValidationResult> Validate(TypeDefinition typeDef)
{
List<MethodDefinition> constructors = typeDef.GetConstructors()?.ToList();
if (constructors == null || !constructors.Any())
{
return new []
{
new TypeDefinitionValidationResult(MissingConstructorError)
};
}
if (constructors.Count > 1)
{
return new []
{
new TypeDefinitionValidationResult(SingleConstructorError)
};
}
return Enumerable.Empty<TypeDefinitionValidationResult>();
}
}
}