pos/is4c-nf/scale-drivers/drivers/NewMagellan/Newtonsoft.Json/Utilities/EnumUtils.cs
#region License
// Copyright (c) 2007 James Newton-King
//
// 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
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.Serialization;
#if NET20
using Newtonsoft.Json.Utilities.LinqBridge;
#else
using System.Linq;
#endif
using System.Reflection;
namespace Newtonsoft.Json.Utilities
{
internal static class EnumUtils
{
private static readonly ThreadSafeStore<Type, BidirectionalDictionary<string, string>> EnumMemberNamesPerType = new ThreadSafeStore<Type, BidirectionalDictionary<string, string>>(InitializeEnumType);
private static BidirectionalDictionary<string, string> InitializeEnumType(Type type)
{
BidirectionalDictionary<string, string> map = new BidirectionalDictionary<string, string>(
StringComparer.OrdinalIgnoreCase,
StringComparer.OrdinalIgnoreCase);
foreach (FieldInfo f in type.GetFields())
{
string n1 = f.Name;
string n2;
#if !NET20
n2 = f.GetCustomAttributes(typeof(EnumMemberAttribute), true)
.Cast<EnumMemberAttribute>()
.Select(a => a.Value)
.SingleOrDefault() ?? f.Name;
#else
n2 = f.Name;
#endif
string s;
if (map.TryGetBySecond(n2, out s))
throw new InvalidOperationException("Enum name '{0}' already exists on enum '{1}'.".FormatWith(CultureInfo.InvariantCulture, n2, type.Name));
map.Set(n1, n2);
}
return map;
}
public static IList<T> GetFlagsValues<T>(T value) where T : struct
{
Type enumType = typeof(T);
if (!enumType.IsDefined(typeof(FlagsAttribute), false))
throw new ArgumentException("Enum type {0} is not a set of flags.".FormatWith(CultureInfo.InvariantCulture, enumType));
Type underlyingType = Enum.GetUnderlyingType(value.GetType());
ulong num = Convert.ToUInt64(value, CultureInfo.InvariantCulture);
IList<EnumValue<ulong>> enumNameValues = GetNamesAndValues<T>();
IList<T> selectedFlagsValues = new List<T>();
foreach (EnumValue<ulong> enumNameValue in enumNameValues)
{
if ((num & enumNameValue.Value) == enumNameValue.Value && enumNameValue.Value != 0)
selectedFlagsValues.Add((T)Convert.ChangeType(enumNameValue.Value, underlyingType, CultureInfo.CurrentCulture));
}
if (selectedFlagsValues.Count == 0 && enumNameValues.SingleOrDefault(v => v.Value == 0) != null)
selectedFlagsValues.Add(default(T));
return selectedFlagsValues;
}
/// <summary>
/// Gets a dictionary of the names and values of an Enum type.
/// </summary>
/// <returns></returns>
public static IList<EnumValue<ulong>> GetNamesAndValues<T>() where T : struct
{
return GetNamesAndValues<ulong>(typeof(T));
}
/// <summary>
/// Gets a dictionary of the names and values of an Enum type.
/// </summary>
/// <param name="enumType">The enum type to get names and values for.</param>
/// <returns></returns>
public static IList<EnumValue<TUnderlyingType>> GetNamesAndValues<TUnderlyingType>(Type enumType) where TUnderlyingType : struct
{
if (enumType == null)
throw new ArgumentNullException("enumType");
ValidationUtils.ArgumentTypeIsEnum(enumType, "enumType");
IList<object> enumValues = GetValues(enumType);
IList<string> enumNames = GetNames(enumType);
IList<EnumValue<TUnderlyingType>> nameValues = new List<EnumValue<TUnderlyingType>>();
for (int i = 0; i < enumValues.Count; i++)
{
try
{
nameValues.Add(new EnumValue<TUnderlyingType>(enumNames[i], (TUnderlyingType)Convert.ChangeType(enumValues[i], typeof(TUnderlyingType), CultureInfo.CurrentCulture)));
}
catch (OverflowException e)
{
throw new InvalidOperationException(
string.Format(CultureInfo.InvariantCulture, "Value from enum with the underlying type of {0} cannot be added to dictionary with a value type of {1}. Value was too large: {2}",
Enum.GetUnderlyingType(enumType), typeof(TUnderlyingType), Convert.ToUInt64(enumValues[i], CultureInfo.InvariantCulture)), e);
}
}
return nameValues;
}
public static IList<object> GetValues(Type enumType)
{
if (!enumType.IsEnum())
throw new ArgumentException("Type '" + enumType.Name + "' is not an enum.");
List<object> values = new List<object>();
var fields = enumType.GetFields().Where(f => f.IsLiteral);
foreach (FieldInfo field in fields)
{
object value = field.GetValue(enumType);
values.Add(value);
}
return values;
}
public static IList<string> GetNames(Type enumType)
{
if (!enumType.IsEnum())
throw new ArgumentException("Type '" + enumType.Name + "' is not an enum.");
List<string> values = new List<string>();
var fields = enumType.GetFields().Where(f => f.IsLiteral);
foreach (FieldInfo field in fields)
{
values.Add(field.Name);
}
return values;
}
public static object ParseEnumName(string enumText, bool isNullable, Type t)
{
if (enumText == string.Empty && isNullable)
return null;
string finalEnumText;
BidirectionalDictionary<string, string> map = EnumMemberNamesPerType.Get(t);
if (enumText.IndexOf(',') != -1)
{
string[] names = enumText.Split(',');
for (int i = 0; i < names.Length; i++)
{
string name = names[i].Trim();
names[i] = ResolvedEnumName(map, name);
}
finalEnumText = string.Join(", ", names);
}
else
{
finalEnumText = ResolvedEnumName(map, enumText);
}
return Enum.Parse(t, finalEnumText, true);
}
public static string ToEnumName(Type enumType, string enumText, bool camelCaseText)
{
BidirectionalDictionary<string, string> map = EnumMemberNamesPerType.Get(enumType);
string[] names = enumText.Split(',');
for (int i = 0; i < names.Length; i++)
{
string name = names[i].Trim();
string resolvedEnumName;
map.TryGetByFirst(name, out resolvedEnumName);
resolvedEnumName = resolvedEnumName ?? name;
if (camelCaseText)
resolvedEnumName = StringUtils.ToCamelCase(resolvedEnumName);
names[i] = resolvedEnumName;
}
string finalName = string.Join(", ", names);
return finalName;
}
private static string ResolvedEnumName(BidirectionalDictionary<string, string> map, string enumText)
{
string resolvedEnumName;
map.TryGetBySecond(enumText, out resolvedEnumName);
resolvedEnumName = resolvedEnumName ?? enumText;
return resolvedEnumName;
}
}
}