401 lines
16 KiB
C#
401 lines
16 KiB
C#
#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.Diagnostics;
|
|
using System.Globalization;
|
|
using System.Runtime.Serialization;
|
|
#if !HAVE_LINQ
|
|
using LC.Newtonsoft.Json.Utilities.LinqBridge;
|
|
#else
|
|
using System.Linq;
|
|
#endif
|
|
using System.Reflection;
|
|
using System.Text;
|
|
using LC.Newtonsoft.Json.Serialization;
|
|
|
|
namespace LC.Newtonsoft.Json.Utilities
|
|
{
|
|
internal static class EnumUtils
|
|
{
|
|
private const char EnumSeparatorChar = ',';
|
|
private const string EnumSeparatorString = ", ";
|
|
|
|
private static readonly ThreadSafeStore<StructMultiKey<Type, NamingStrategy>, EnumInfo> ValuesAndNamesPerEnum = new ThreadSafeStore<StructMultiKey<Type, NamingStrategy>, EnumInfo>(InitializeValuesAndNames);
|
|
|
|
private static EnumInfo InitializeValuesAndNames(StructMultiKey<Type, NamingStrategy> key)
|
|
{
|
|
Type enumType = key.Value1;
|
|
string[] names = Enum.GetNames(enumType);
|
|
string[] resolvedNames = new string[names.Length];
|
|
ulong[] values = new ulong[names.Length];
|
|
|
|
for (int i = 0; i < names.Length; i++)
|
|
{
|
|
string name = names[i];
|
|
FieldInfo f = enumType.GetField(name, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Static);
|
|
values[i] = ToUInt64(f.GetValue(null));
|
|
|
|
string resolvedName;
|
|
#if HAVE_DATA_CONTRACTS
|
|
resolvedName = f.GetCustomAttributes(typeof(EnumMemberAttribute), true)
|
|
.Cast<EnumMemberAttribute>()
|
|
.Select(a => a.Value)
|
|
.SingleOrDefault() ?? f.Name;
|
|
|
|
if (Array.IndexOf(resolvedNames, resolvedName, 0, i) != -1)
|
|
{
|
|
throw new InvalidOperationException("Enum name '{0}' already exists on enum '{1}'.".FormatWith(CultureInfo.InvariantCulture, resolvedName, enumType.Name));
|
|
}
|
|
#else
|
|
resolvedName = name;
|
|
#endif
|
|
|
|
resolvedNames[i] = key.Value2 != null
|
|
? key.Value2.GetPropertyName(resolvedName, false)
|
|
: resolvedName;
|
|
}
|
|
|
|
bool isFlags = enumType.IsDefined(typeof(FlagsAttribute), false);
|
|
|
|
return new EnumInfo(isFlags, values, names, resolvedNames);
|
|
}
|
|
|
|
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 = ToUInt64(value);
|
|
EnumInfo enumNameValues = GetEnumValuesAndNames(enumType);
|
|
IList<T> selectedFlagsValues = new List<T>();
|
|
|
|
for (int i = 0; i < enumNameValues.Values.Length; i++)
|
|
{
|
|
ulong v = enumNameValues.Values[i];
|
|
|
|
if ((num & v) == v && v != 0)
|
|
{
|
|
selectedFlagsValues.Add((T)Convert.ChangeType(v, underlyingType, CultureInfo.CurrentCulture));
|
|
}
|
|
}
|
|
|
|
if (selectedFlagsValues.Count == 0 && enumNameValues.Values.Any(v => v == 0))
|
|
{
|
|
selectedFlagsValues.Add(default);
|
|
}
|
|
|
|
return selectedFlagsValues;
|
|
}
|
|
|
|
// Used by Newtonsoft.Json.Schema
|
|
private static CamelCaseNamingStrategy _camelCaseNamingStrategy = new CamelCaseNamingStrategy();
|
|
public static bool TryToString(Type enumType, object value, bool camelCase, out string name)
|
|
{
|
|
return TryToString(enumType, value, camelCase ? _camelCaseNamingStrategy : null, out name);
|
|
}
|
|
|
|
public static bool TryToString(Type enumType, object value, NamingStrategy namingStrategy, out string name)
|
|
{
|
|
EnumInfo enumInfo = ValuesAndNamesPerEnum.Get(new StructMultiKey<Type, NamingStrategy>(enumType, namingStrategy));
|
|
ulong v = ToUInt64(value);
|
|
|
|
if (!enumInfo.IsFlags)
|
|
{
|
|
int index = Array.BinarySearch(enumInfo.Values, v);
|
|
if (index >= 0)
|
|
{
|
|
name = enumInfo.ResolvedNames[index];
|
|
return true;
|
|
}
|
|
|
|
// is number value
|
|
name = null;
|
|
return false;
|
|
}
|
|
else // These are flags OR'ed together (We treat everything as unsigned types)
|
|
{
|
|
name = InternalFlagsFormat(enumInfo, v);
|
|
return name != null;
|
|
}
|
|
}
|
|
|
|
private static string InternalFlagsFormat(EnumInfo entry, ulong result)
|
|
{
|
|
string[] resolvedNames = entry.ResolvedNames;
|
|
ulong[] values = entry.Values;
|
|
|
|
int index = values.Length - 1;
|
|
StringBuilder sb = new StringBuilder();
|
|
bool firstTime = true;
|
|
ulong saveResult = result;
|
|
|
|
// We will not optimize this code further to keep it maintainable. There are some boundary checks that can be applied
|
|
// to minimize the comparsions required. This code works the same for the best/worst case. In general the number of
|
|
// items in an enum are sufficiently small and not worth the optimization.
|
|
while (index >= 0)
|
|
{
|
|
if (index == 0 && values[index] == 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
if ((result & values[index]) == values[index])
|
|
{
|
|
result -= values[index];
|
|
if (!firstTime)
|
|
{
|
|
sb.Insert(0, EnumSeparatorString);
|
|
}
|
|
|
|
string resolvedName = resolvedNames[index];
|
|
sb.Insert(0, resolvedName);
|
|
firstTime = false;
|
|
}
|
|
|
|
index--;
|
|
}
|
|
|
|
string returnString;
|
|
if (result != 0)
|
|
{
|
|
// We were unable to represent this number as a bitwise or of valid flags
|
|
returnString = null; // return null so the caller knows to .ToString() the input
|
|
}
|
|
else if (saveResult == 0)
|
|
{
|
|
// For the cases when we have zero
|
|
if (values.Length > 0 && values[0] == 0)
|
|
{
|
|
returnString = resolvedNames[0]; // Zero was one of the enum values.
|
|
}
|
|
else
|
|
{
|
|
returnString = null;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
returnString = sb.ToString(); // Return the string representation
|
|
}
|
|
|
|
return returnString;
|
|
}
|
|
|
|
public static EnumInfo GetEnumValuesAndNames(Type enumType)
|
|
{
|
|
return ValuesAndNamesPerEnum.Get(new StructMultiKey<Type, NamingStrategy>(enumType, null));
|
|
}
|
|
|
|
private static ulong ToUInt64(object value)
|
|
{
|
|
PrimitiveTypeCode typeCode = ConvertUtils.GetTypeCode(value.GetType(), out bool _);
|
|
|
|
switch (typeCode)
|
|
{
|
|
case PrimitiveTypeCode.SByte:
|
|
return (ulong)(sbyte)value;
|
|
case PrimitiveTypeCode.Byte:
|
|
return (byte)value;
|
|
case PrimitiveTypeCode.Boolean:
|
|
// direct cast from bool to byte is not allowed
|
|
return Convert.ToByte((bool)value);
|
|
case PrimitiveTypeCode.Int16:
|
|
return (ulong)(short)value;
|
|
case PrimitiveTypeCode.UInt16:
|
|
return (ushort)value;
|
|
case PrimitiveTypeCode.Char:
|
|
return (char)value;
|
|
case PrimitiveTypeCode.UInt32:
|
|
return (uint)value;
|
|
case PrimitiveTypeCode.Int32:
|
|
return (ulong)(int)value;
|
|
case PrimitiveTypeCode.UInt64:
|
|
return (ulong)value;
|
|
case PrimitiveTypeCode.Int64:
|
|
return (ulong)(long)value;
|
|
// All unsigned types will be directly cast
|
|
default:
|
|
throw new InvalidOperationException("Unknown enum type.");
|
|
}
|
|
}
|
|
|
|
public static object ParseEnum(Type enumType, NamingStrategy namingStrategy, string value, bool disallowNumber)
|
|
{
|
|
ValidationUtils.ArgumentNotNull(enumType, nameof(enumType));
|
|
ValidationUtils.ArgumentNotNull(value, nameof(value));
|
|
|
|
if (!enumType.IsEnum())
|
|
{
|
|
throw new ArgumentException("Type provided must be an Enum.", nameof(enumType));
|
|
}
|
|
|
|
EnumInfo entry = ValuesAndNamesPerEnum.Get(new StructMultiKey<Type, NamingStrategy>(enumType, namingStrategy));
|
|
string[] enumNames = entry.Names;
|
|
string[] resolvedNames = entry.ResolvedNames;
|
|
ulong[] enumValues = entry.Values;
|
|
|
|
// first check if the entire text (including commas) matches a resolved name
|
|
int? matchingIndex = FindIndexByName(resolvedNames, value, 0, value.Length, StringComparison.Ordinal);
|
|
if (matchingIndex != null)
|
|
{
|
|
return Enum.ToObject(enumType, enumValues[matchingIndex.Value]);
|
|
}
|
|
|
|
int firstNonWhitespaceIndex = -1;
|
|
for (int i = 0; i < value.Length; i++)
|
|
{
|
|
if (!char.IsWhiteSpace(value[i]))
|
|
{
|
|
firstNonWhitespaceIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
if (firstNonWhitespaceIndex == -1)
|
|
{
|
|
throw new ArgumentException("Must specify valid information for parsing in the string.");
|
|
}
|
|
|
|
// check whether string is a number and parse as a number value
|
|
char firstNonWhitespaceChar = value[firstNonWhitespaceIndex];
|
|
if (char.IsDigit(firstNonWhitespaceChar) || firstNonWhitespaceChar == '-' || firstNonWhitespaceChar == '+')
|
|
{
|
|
Type underlyingType = Enum.GetUnderlyingType(enumType);
|
|
|
|
value = value.Trim();
|
|
object temp = null;
|
|
|
|
try
|
|
{
|
|
temp = Convert.ChangeType(value, underlyingType, CultureInfo.InvariantCulture);
|
|
}
|
|
catch (FormatException)
|
|
{
|
|
// We need to Parse this as a String instead. There are cases
|
|
// when you tlbimp enums that can have values of the form "3D".
|
|
// Don't fix this code.
|
|
}
|
|
|
|
if (temp != null)
|
|
{
|
|
if (disallowNumber)
|
|
{
|
|
throw new FormatException("Integer string '{0}' is not allowed.".FormatWith(CultureInfo.InvariantCulture, value));
|
|
}
|
|
|
|
return Enum.ToObject(enumType, temp);
|
|
}
|
|
}
|
|
|
|
ulong result = 0;
|
|
|
|
int valueIndex = firstNonWhitespaceIndex;
|
|
while (valueIndex <= value.Length) // '=' is to handle invalid case of an ending comma
|
|
{
|
|
// Find the next separator, if there is one, otherwise the end of the string.
|
|
int endIndex = value.IndexOf(EnumSeparatorChar, valueIndex);
|
|
if (endIndex == -1)
|
|
{
|
|
endIndex = value.Length;
|
|
}
|
|
|
|
// Shift the starting and ending indices to eliminate whitespace
|
|
int endIndexNoWhitespace = endIndex;
|
|
while (valueIndex < endIndex && char.IsWhiteSpace(value[valueIndex]))
|
|
{
|
|
valueIndex++;
|
|
}
|
|
|
|
while (endIndexNoWhitespace > valueIndex && char.IsWhiteSpace(value[endIndexNoWhitespace - 1]))
|
|
{
|
|
endIndexNoWhitespace--;
|
|
}
|
|
int valueSubstringLength = endIndexNoWhitespace - valueIndex;
|
|
|
|
// match with case sensitivity
|
|
matchingIndex = MatchName(value, enumNames, resolvedNames, valueIndex, valueSubstringLength, StringComparison.Ordinal);
|
|
|
|
// if no match found, attempt case insensitive search
|
|
if (matchingIndex == null)
|
|
{
|
|
matchingIndex = MatchName(value, enumNames, resolvedNames, valueIndex, valueSubstringLength, StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
if (matchingIndex == null)
|
|
{
|
|
// still can't find a match
|
|
// before we throw an error, check whether the entire string has a case insensitive match against resolve names
|
|
matchingIndex = FindIndexByName(resolvedNames, value, 0, value.Length, StringComparison.OrdinalIgnoreCase);
|
|
if (matchingIndex != null)
|
|
{
|
|
return Enum.ToObject(enumType, enumValues[matchingIndex.Value]);
|
|
}
|
|
|
|
// no match so error
|
|
throw new ArgumentException("Requested value '{0}' was not found.".FormatWith(CultureInfo.InvariantCulture, value));
|
|
}
|
|
|
|
result |= enumValues[matchingIndex.Value];
|
|
|
|
// Move our pointer to the ending index to go again.
|
|
valueIndex = endIndex + 1;
|
|
}
|
|
|
|
return Enum.ToObject(enumType, result);
|
|
}
|
|
|
|
private static int? MatchName(string value, string[] enumNames, string[] resolvedNames, int valueIndex, int valueSubstringLength, StringComparison comparison)
|
|
{
|
|
int? matchingIndex = FindIndexByName(resolvedNames, value, valueIndex, valueSubstringLength, comparison);
|
|
if (matchingIndex == null)
|
|
{
|
|
matchingIndex = FindIndexByName(enumNames, value, valueIndex, valueSubstringLength, comparison);
|
|
}
|
|
|
|
return matchingIndex;
|
|
}
|
|
|
|
private static int? FindIndexByName(string[] enumNames, string value, int valueIndex, int valueSubstringLength, StringComparison comparison)
|
|
{
|
|
for (int i = 0; i < enumNames.Length; i++)
|
|
{
|
|
if (enumNames[i].Length == valueSubstringLength &&
|
|
string.Compare(enumNames[i], 0, value, valueIndex, valueSubstringLength, comparison) == 0)
|
|
{
|
|
return i;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
} |