/Newtonsoft.Json/Modules/Utilities/EnumUtils.cs
C# | 147 lines | 91 code | 25 blank | 31 comment | 15 complexity | c8f70cca3a4d3abb680fdef1ae720d70 MD5 | raw file
- #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;
- #if NET20
- using Newtonsoft.Json.Utilities.LinqBridge;
- #else
- using System.Linq;
- #endif
- using System.Reflection;
- namespace Newtonsoft.Json.Utilities
- {
- internal static class EnumUtils
- {
- 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);
- EnumValues<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 EnumValues<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 EnumValues<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);
- EnumValues<TUnderlyingType> nameValues = new EnumValues<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 = from field in enumType.GetFields()
- where field.IsLiteral
- select field;
- 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 = from field in enumType.GetFields()
- where field.IsLiteral
- select field;
- foreach (FieldInfo field in fields)
- {
- values.Add(field.Name);
- }
- return values;
- }
- }
- }