CommandLine.Infrastructure.ReflectionHelper Class Reference

Static Public Member Functions
static void	SetAttributeOverride (IEnumerable< Attribute > overrides)
	Assembly attribute overrides for testing.
static Maybe< TAttribute >	GetAttribute< TAttribute > ()
static string	GetAssemblyName ()
static string	GetAssemblyVersion ()
static bool	IsFSharpOptionType (Type type)
static T	CreateDefaultImmutableInstance< T > (Type[] constructorTypes)
static object	CreateDefaultImmutableInstance (Type type, Type[] constructorTypes)
static IEnumerable< string >	GetNamesOfEnum (Type t)

Static Private Member Functions
static Assembly	GetExecutingOrEntryAssembly ()

Static Private Attributes
static IDictionary< Type, Attribute >	_overrides
	Per thread assembly attribute overrides for testing.

Detailed Description

Definition at line 14 of file ReflectionHelper.cs.

Member Function Documentation

CreateDefaultImmutableInstance()

static object CommandLine.Infrastructure.ReflectionHelper.CreateDefaultImmutableInstance ( Type  type, Type[]  constructorTypes  )

static

Definition at line 101 of file ReflectionHelper.cs.

        {
            ConstructorInfo ctor = type.GetTypeInfo()
                                       .GetConstructor(constructorTypes);
 
            if (ctor == null)
            {
                throw new
                    InvalidOperationException($"Type {type.FullName} appears to be immutable, but no constructor found to accept values."
                                             );
            }
 
            object[] values = (from prms in ctor.GetParameters()
                               select prms.ParameterType.CreateDefaultForImmutable()).ToArray();
 
            return ctor.Invoke(values);
        }

CreateDefaultImmutableInstance< T >()

static T CommandLine.Infrastructure.ReflectionHelper.CreateDefaultImmutableInstance< T > ( Type[]  constructorTypes )

static

Definition at line 94 of file ReflectionHelper.cs.

        {
            Type t = typeof(T);
 
            return (T)CreateDefaultImmutableInstance(t, constructorTypes);
        }

GetAssemblyName()

static string CommandLine.Infrastructure.ReflectionHelper.GetAssemblyName ( )

static

Definition at line 71 of file ReflectionHelper.cs.

        {
            Assembly assembly = GetExecutingOrEntryAssembly();
 
            return assembly.GetName()
                           .Name;
        }

GetAssemblyVersion()

static string CommandLine.Infrastructure.ReflectionHelper.GetAssemblyVersion ( )

static

Definition at line 79 of file ReflectionHelper.cs.

        {
            Assembly assembly = GetExecutingOrEntryAssembly();
 
            return assembly.GetName()
                           .Version.ToStringInvariant();
        }

GetAttribute< TAttribute >()

static Maybe< TAttribute > CommandLine.Infrastructure.ReflectionHelper.GetAttribute< TAttribute > ( )

static

Type Constraints

TAttribute

:

Attribute

Definition at line 45 of file ReflectionHelper.cs.

                             : Attribute
        {
            // Test support
            if (_overrides != null)
            {
                return
                    _overrides.ContainsKey(typeof(TAttribute))
                        ? Maybe.Just((TAttribute)_overrides[typeof(TAttribute)])
                        : Maybe.Nothing<TAttribute>();
            }
 
            Assembly assembly = GetExecutingOrEntryAssembly();
 
#if NET40
            object[] attributes = assembly.GetCustomAttributes(typeof(TAttribute), false);
#else
            TAttribute[] attributes = assembly.GetCustomAttributes<TAttribute>()
                                              .ToArray();
#endif
 
            return attributes.Length > 0
                       ? Maybe.Just((TAttribute)attributes[0])
                       : Maybe.Nothing<TAttribute>();
        }

GetExecutingOrEntryAssembly()

static Assembly CommandLine.Infrastructure.ReflectionHelper.GetExecutingOrEntryAssembly ( )

staticprivate

Definition at line 119 of file ReflectionHelper.cs.

        {
            //resolve issues of null EntryAssembly in Xunit Test #392,424,389
            //return Assembly.GetEntryAssembly();
            return Assembly.GetEntryAssembly() ?? Assembly.GetCallingAssembly();
        }

GetNamesOfEnum()

static IEnumerable< string > CommandLine.Infrastructure.ReflectionHelper.GetNamesOfEnum ( Type  t )

static

Definition at line 126 of file ReflectionHelper.cs.

        {
            if (t.IsEnum)
            {
                return Enum.GetNames(t);
            }
 
            Type u = Nullable.GetUnderlyingType(t);
 
            if (u != null && u.IsEnum)
            {
                return Enum.GetNames(u);
            }
 
            return Enumerable.Empty<string>();
        }

IsFSharpOptionType()

static bool CommandLine.Infrastructure.ReflectionHelper.IsFSharpOptionType ( Type  type )

static

Definition at line 87 of file ReflectionHelper.cs.

        {
            return type.FullName.StartsWith("Microsoft.FSharp.Core.FSharpOption`1",
                                            StringComparison.Ordinal
                                           );
        }

SetAttributeOverride()

static void CommandLine.Infrastructure.ReflectionHelper.SetAttributeOverride ( IEnumerable< Attribute >  overrides )

static

Assembly attribute overrides for testing.

The implementation will fail if two or more attributes of the same type are included in overrides .

Parameters

overrides

Attributes that replace the existing assembly attributes or null, to clear any testing attributes.

Definition at line 33 of file ReflectionHelper.cs.

        {
            if (overrides != null)
            {
                _overrides = overrides.ToDictionary(attr => attr.GetType(), attr => attr);
            }
            else
            {
                _overrides = null;
            }
        }

Member Data Documentation

_overrides

IDictionary<Type, Attribute> CommandLine.Infrastructure.ReflectionHelper._overrides

staticprivate

Per thread assembly attribute overrides for testing.

Definition at line 20 of file ReflectionHelper.cs.

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The documentation for this class was generated from the following file:

• deps/commandlineparser/src/CommandLine/Infrastructure/ReflectionHelper.cs