Code Coverage Statistics for Source File
Newtonsoft.Json\Utilities\ConvertUtils.cs
Symbol Coverage: 50.94% (81 of 159)
Branch Coverage: 51.20% (64 of 125)
Cyclomatic Complexity Avg: 3.13 Max:27
Code Lines: 163
Symbol Coverage Trend
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#region License |
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// Copyright (c) 2007 James Newton-King |
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// |
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// Permission is hereby granted, free of charge, to any person |
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// obtaining a copy of this software and associated documentation |
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// files (the "Software"), to deal in the Software without |
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// restriction, including without limitation the rights to use, |
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// copy, modify, merge, publish, distribute, sublicense, and/or sell |
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// copies of the Software, and to permit persons to whom the |
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// Software is furnished to do so, subject to the following |
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// conditions: |
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// |
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// The above copyright notice and this permission notice shall be |
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// included in all copies or substantial portions of the Software. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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// OTHER DEALINGS IN THE SOFTWARE. |
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#endregion |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using System.Globalization; |
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using System.ComponentModel; |
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using Newtonsoft.Json.Serialization; |
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using System.Reflection; |
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#if !SILVERLIGHT |
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using System.Data.SqlTypes; |
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#endif |
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namespace Newtonsoft.Json.Utilities |
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{ |
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internal static class ConvertUtils |
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{ |
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internal struct TypeConvertKey : IEquatable<TypeConvertKey> |
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{ |
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private readonly Type _initialType; |
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private readonly Type _targetType; |
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public Type InitialType |
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{ |
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get { return _initialType; }
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} |
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public Type TargetType |
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{ |
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get { return _targetType; }
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} |
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public TypeConvertKey(Type initialType, Type targetType) |
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{ |
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_initialType = initialType;
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_targetType = targetType;
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}
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public override int GetHashCode() |
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{ |
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return _initialType.GetHashCode() ^ _targetType.GetHashCode();
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}
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public override bool Equals(object obj) |
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{ |
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0 |
if (!(obj is TypeConvertKey))
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return false;
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return Equals((TypeConvertKey)obj);
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}
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public bool Equals(TypeConvertKey other) |
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{ |
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1 |
return (_initialType == other._initialType && _targetType == other._targetType);
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1 |
}
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} |
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private static readonly ThreadSafeStore<TypeConvertKey, Func<object, object>> CastConverters =
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new ThreadSafeStore<TypeConvertKey, Func<object, object>>(CreateCastConverter);
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private static Func<object, object> CreateCastConverter(TypeConvertKey t) |
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{ |
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MethodInfo castMethodInfo = t.TargetType.GetMethod("op_Implicit", new[] { t.InitialType });
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if (castMethodInfo == null)
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castMethodInfo = t.TargetType.GetMethod("op_Explicit", new[] { t.InitialType });
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if (castMethodInfo == null)
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return null;
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MethodCall<object, object> call = JsonTypeReflector.ReflectionDelegateFactory.CreateMethodCall<object>(castMethodInfo);
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return o => call(null, o);
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}
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public static bool CanConvertType(Type initialType, Type targetType, bool allowTypeNameToString) |
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{ |
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ValidationUtils.ArgumentNotNull(initialType, "initialType");
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ValidationUtils.ArgumentNotNull(targetType, "targetType");
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if (ReflectionUtils.IsNullableType(targetType))
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targetType = Nullable.GetUnderlyingType(targetType);
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if (targetType == initialType)
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return true;
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if (typeof(IConvertible).IsAssignableFrom(initialType) && typeof(IConvertible).IsAssignableFrom(targetType))
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{ |
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return true;
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} |
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#if !PocketPC && !NET20 |
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0 |
if (initialType == typeof(DateTime) && targetType == typeof(DateTimeOffset))
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return true;
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#endif |
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if (initialType == typeof(Guid) && (targetType == typeof(Guid) || targetType == typeof(string)))
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return true;
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if (initialType == typeof(Type) && targetType == typeof(string))
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return true;
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#if !PocketPC |
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// see if source or target types have a TypeConverter that converts between the two |
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0 |
TypeConverter toConverter = GetConverter(initialType);
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if (toConverter != null && !IsComponentConverter(toConverter) && toConverter.CanConvertTo(targetType))
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{ |
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0 |
if (allowTypeNameToString || toConverter.GetType() != typeof(TypeConverter))
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return true;
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} |
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TypeConverter fromConverter = GetConverter(targetType);
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if (fromConverter != null && !IsComponentConverter(fromConverter) && fromConverter.CanConvertFrom(initialType))
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return true;
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#endif |
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// handle DBNull and INullable |
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0 |
if (initialType == typeof(DBNull))
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{ |
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0 |
if (ReflectionUtils.IsNullable(targetType))
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return true;
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} |
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return false;
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}
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private static bool IsComponentConverter(TypeConverter converter) |
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{ |
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#if !SILVERLIGHT && !PocketPC |
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return (converter is ComponentConverter);
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#else |
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return false; |
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#endif |
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}
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#region Convert |
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/// <summary> |
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/// Converts the value to the specified type. |
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/// </summary> |
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/// <typeparam name="T">The type to convert the value to.</typeparam> |
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/// <param name="initialValue">The value to convert.</param> |
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/// <returns>The converted type.</returns> |
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public static T Convert<T>(object initialValue) |
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{ |
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return Convert<T>(initialValue, CultureInfo.CurrentCulture);
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}
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/// <summary> |
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/// Converts the value to the specified type. |
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/// </summary> |
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/// <typeparam name="T">The type to convert the value to.</typeparam> |
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/// <param name="initialValue">The value to convert.</param> |
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/// <param name="culture">The culture to use when converting.</param> |
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/// <returns>The converted type.</returns> |
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public static T Convert<T>(object initialValue, CultureInfo culture) |
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{ |
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return (T)Convert(initialValue, culture, typeof(T));
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}
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/// <summary> |
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/// Converts the value to the specified type. |
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/// </summary> |
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/// <param name="initialValue">The value to convert.</param> |
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/// <param name="culture">The culture to use when converting.</param> |
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/// <param name="targetType">The type to convert the value to.</param> |
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/// <returns>The converted type.</returns> |
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public static object Convert(object initialValue, CultureInfo culture, Type targetType) |
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{ |
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40239 |
if (initialValue == null)
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1 |
throw new ArgumentNullException("initialValue");
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40238 |
if (ReflectionUtils.IsNullableType(targetType))
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8 |
targetType = Nullable.GetUnderlyingType(targetType);
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40238 |
Type initialType = initialValue.GetType();
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40238 |
if (targetType == initialType)
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return initialValue;
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40235 |
if (initialValue is string && typeof(Type).IsAssignableFrom(targetType))
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return Type.GetType((string) initialValue, true);
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40233 |
if (targetType.IsInterface || targetType.IsGenericTypeDefinition || targetType.IsAbstract)
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throw new ArgumentException("Target type {0} is not a value type or a non-abstract class.".FormatWith(CultureInfo.InvariantCulture, targetType), "targetType");
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// use Convert.ChangeType if both types are IConvertible |
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40233 |
if (initialValue is IConvertible && typeof(IConvertible).IsAssignableFrom(targetType))
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{ |
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40209 |
if (targetType.IsEnum)
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{ |
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if (initialValue is string)
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2 |
return Enum.Parse(targetType, initialValue.ToString(), true);
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else if (IsInteger(initialValue))
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return Enum.ToObject(targetType, initialValue);
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} |
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|
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40198 |
return System.Convert.ChangeType(initialValue, targetType, culture);
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} |
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#if !PocketPC && !NET20 |
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24 |
if (initialValue is DateTime && targetType == typeof(DateTimeOffset))
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2 |
return new DateTimeOffset((DateTime)initialValue);
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#endif |
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22 |
if (initialValue is string)
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{ |
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22 |
if (targetType == typeof (Guid))
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16 |
return new Guid((string) initialValue);
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6 |
if (targetType == typeof (Uri))
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1 |
return new Uri((string) initialValue);
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237 |
5 |
if (targetType == typeof (TimeSpan))
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1 |
return TimeSpan.Parse((string) initialValue);
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} |
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#if !PocketPC |
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// see if source or target types have a TypeConverter that converts between the two |
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4 |
TypeConverter toConverter = GetConverter(initialType);
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||
245 |
4 |
if (toConverter != null && toConverter.CanConvertTo(targetType))
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{ |
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#if !SILVERLIGHT |
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0 |
return toConverter.ConvertTo(null, culture, initialValue, targetType);
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#else |
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return toConverter.ConvertTo(initialValue, targetType); |
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#endif |
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} |
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4 |
TypeConverter fromConverter = GetConverter(targetType);
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256 |
4 |
if (fromConverter != null && fromConverter.CanConvertFrom(initialType))
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{ |
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#if !SILVERLIGHT |
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1 |
return fromConverter.ConvertFrom(null, culture, initialValue);
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#else |
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return fromConverter.ConvertFrom(initialValue); |
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#endif |
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} |
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#endif |
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266 |
// handle DBNull and INullable |
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267 |
3 |
if (initialValue == DBNull.Value)
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{ |
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269 |
0 |
if (ReflectionUtils.IsNullable(targetType))
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0 |
return EnsureTypeAssignable(null, initialType, targetType);
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|
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272 |
0 |
throw new Exception("Can not convert null {0} into non-nullable {1}.".FormatWith(CultureInfo.InvariantCulture, initialType, targetType));
|
273 |
} |
|
274 |
#if !SILVERLIGHT |
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275 |
3 |
if (initialValue is INullable)
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276 |
0 |
return EnsureTypeAssignable(ToValue((INullable)initialValue), initialType, targetType);
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277 |
#endif |
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||
279 |
3 |
throw new Exception("Can not convert from {0} to {1}.".FormatWith(CultureInfo.InvariantCulture, initialType, targetType));
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40233 |
}
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#endregion |
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#region TryConvert |
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/// <summary> |
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/// Converts the value to the specified type. |
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/// </summary> |
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/// <typeparam name="T">The type to convert the value to.</typeparam> |
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/// <param name="initialValue">The value to convert.</param> |
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/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
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/// <returns> |
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/// <c>true</c> if <c>initialValue</c> was converted successfully; otherwise, <c>false</c>. |
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/// </returns> |
|
293 |
public static bool TryConvert<T>(object initialValue, out T convertedValue) |
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{ |
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0 |
return TryConvert(initialValue, CultureInfo.CurrentCulture, out convertedValue);
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296 |
0 |
}
|
297 |
||
298 |
/// <summary> |
|
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/// Converts the value to the specified type. |
|
300 |
/// </summary> |
|
301 |
/// <typeparam name="T">The type to convert the value to.</typeparam> |
|
302 |
/// <param name="initialValue">The value to convert.</param> |
|
303 |
/// <param name="culture">The culture to use when converting.</param> |
|
304 |
/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
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/// <returns> |
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/// <c>true</c> if <c>initialValue</c> was converted successfully; otherwise, <c>false</c>. |
|
307 |
/// </returns> |
|
308 |
public static bool TryConvert<T>(object initialValue, CultureInfo culture, out T convertedValue) |
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309 |
{ |
|
310 |
0 |
return MiscellaneousUtils.TryAction<T>(delegate
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311 |
0 |
{
|
312 |
0 |
object tempConvertedValue;
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313 |
0 |
TryConvert(initialValue, CultureInfo.CurrentCulture, typeof(T), out tempConvertedValue);
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314 |
0 |
|
315 |
0 |
return (T)tempConvertedValue;
|
316 |
0 |
}, out convertedValue);
|
317 |
0 |
}
|
318 |
||
319 |
/// <summary> |
|
320 |
/// Converts the value to the specified type. |
|
321 |
/// </summary> |
|
322 |
/// <param name="initialValue">The value to convert.</param> |
|
323 |
/// <param name="culture">The culture to use when converting.</param> |
|
324 |
/// <param name="targetType">The type to convert the value to.</param> |
|
325 |
/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
|
326 |
/// <returns> |
|
327 |
/// <c>true</c> if <c>initialValue</c> was converted successfully; otherwise, <c>false</c>. |
|
328 |
/// </returns> |
|
329 |
public static bool TryConvert(object initialValue, CultureInfo culture, Type targetType, out object convertedValue) |
|
330 |
{ |
|
331 |
40239 |
return MiscellaneousUtils.TryAction<object>(delegate { return Convert(initialValue, culture, targetType); }, out convertedValue);
|
332 |
40239 |
}
|
333 |
#endregion |
|
334 |
||
335 |
#region ConvertOrCast |
|
336 |
/// <summary> |
|
337 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
338 |
/// value is checked whether it assignable to the specified type. |
|
339 |
/// </summary> |
|
340 |
/// <typeparam name="T">The type to convert or cast the value to.</typeparam> |
|
341 |
/// <param name="initialValue">The value to convert.</param> |
|
342 |
/// <returns>The converted type. If conversion was unsuccessful, the initial value is returned if assignable to the target type</returns> |
|
343 |
public static T ConvertOrCast<T>(object initialValue) |
|
344 |
{ |
|
345 |
0 |
return ConvertOrCast<T>(initialValue, CultureInfo.CurrentCulture);
|
346 |
0 |
}
|
347 |
||
348 |
/// <summary> |
|
349 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
350 |
/// value is checked whether it assignable to the specified type. |
|
351 |
/// </summary> |
|
352 |
/// <typeparam name="T">The type to convert or cast the value to.</typeparam> |
|
353 |
/// <param name="initialValue">The value to convert.</param> |
|
354 |
/// <param name="culture">The culture to use when converting.</param> |
|
355 |
/// <returns>The converted type. If conversion was unsuccessful, the initial value is returned if assignable to the target type</returns> |
|
356 |
public static T ConvertOrCast<T>(object initialValue, CultureInfo culture) |
|
357 |
{ |
|
358 |
0 |
return (T)ConvertOrCast(initialValue, culture, typeof(T));
|
359 |
0 |
}
|
360 |
||
361 |
/// <summary> |
|
362 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
363 |
/// value is checked whether it assignable to the specified type. |
|
364 |
/// </summary> |
|
365 |
/// <param name="initialValue">The value to convert.</param> |
|
366 |
/// <param name="culture">The culture to use when converting.</param> |
|
367 |
/// <param name="targetType">The type to convert or cast the value to.</param> |
|
368 |
/// <returns> |
|
369 |
/// The converted type. If conversion was unsuccessful, the initial value |
|
370 |
/// is returned if assignable to the target type. |
|
371 |
/// </returns> |
|
372 |
public static object ConvertOrCast(object initialValue, CultureInfo culture, Type targetType) |
|
373 |
{ |
|
374 |
object convertedValue; |
|
375 |
||
376 |
60310 |
if (targetType == typeof(object))
|
377 |
18 |
return initialValue;
|
378 |
||
379 |
60292 |
if (initialValue == null && ReflectionUtils.IsNullable(targetType))
|
380 |
20053 |
return null;
|
381 |
||
382 |
40239 |
if (TryConvert(initialValue, culture, targetType, out convertedValue))
|
383 |
40233 |
return convertedValue;
|
384 |
||
385 |
6 |
return EnsureTypeAssignable(initialValue, ReflectionUtils.GetObjectType(initialValue), targetType);
|
386 |
60306 |
}
|
387 |
#endregion |
|
388 |
||
389 |
#region TryConvertOrCast |
|
390 |
/// <summary> |
|
391 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
392 |
/// value is checked whether it assignable to the specified type. |
|
393 |
/// </summary> |
|
394 |
/// <typeparam name="T">The type to convert the value to.</typeparam> |
|
395 |
/// <param name="initialValue">The value to convert.</param> |
|
396 |
/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
|
397 |
/// <returns> |
|
398 |
/// <c>true</c> if <c>initialValue</c> was converted successfully or is assignable; otherwise, <c>false</c>. |
|
399 |
/// </returns> |
|
400 |
public static bool TryConvertOrCast<T>(object initialValue, out T convertedValue) |
|
401 |
{ |
|
402 |
0 |
return TryConvertOrCast<T>(initialValue, CultureInfo.CurrentCulture, out convertedValue);
|
403 |
0 |
}
|
404 |
||
405 |
/// <summary> |
|
406 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
407 |
/// value is checked whether it assignable to the specified type. |
|
408 |
/// </summary> |
|
409 |
/// <typeparam name="T">The type to convert the value to.</typeparam> |
|
410 |
/// <param name="initialValue">The value to convert.</param> |
|
411 |
/// <param name="culture">The culture to use when converting.</param> |
|
412 |
/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
|
413 |
/// <returns> |
|
414 |
/// <c>true</c> if <c>initialValue</c> was converted successfully or is assignable; otherwise, <c>false</c>. |
|
415 |
/// </returns> |
|
416 |
public static bool TryConvertOrCast<T>(object initialValue, CultureInfo culture, out T convertedValue) |
|
417 |
{ |
|
418 |
0 |
return MiscellaneousUtils.TryAction<T>(delegate
|
419 |
0 |
{
|
420 |
0 |
object tempConvertedValue;
|
421 |
0 |
TryConvertOrCast(initialValue, CultureInfo.CurrentCulture, typeof(T), out tempConvertedValue);
|
422 |
0 |
|
423 |
0 |
return (T)tempConvertedValue;
|
424 |
0 |
}, out convertedValue);
|
425 |
0 |
}
|
426 |
||
427 |
/// <summary> |
|
428 |
/// Converts the value to the specified type. If the value is unable to be converted, the |
|
429 |
/// value is checked whether it assignable to the specified type. |
|
430 |
/// </summary> |
|
431 |
/// <param name="initialValue">The value to convert.</param> |
|
432 |
/// <param name="culture">The culture to use when converting.</param> |
|
433 |
/// <param name="targetType">The type to convert the value to.</param> |
|
434 |
/// <param name="convertedValue">The converted value if the conversion was successful or the default value of <c>T</c> if it failed.</param> |
|
435 |
/// <returns> |
|
436 |
/// <c>true</c> if <c>initialValue</c> was converted successfully or is assignable; otherwise, <c>false</c>. |
|
437 |
/// </returns> |
|
438 |
public static bool TryConvertOrCast(object initialValue, CultureInfo culture, Type targetType, out object convertedValue) |
|
439 |
{ |
|
440 |
0 |
return MiscellaneousUtils.TryAction<object>(delegate { return ConvertOrCast(initialValue, culture, targetType); }, out convertedValue);
|
441 |
0 |
}
|
442 |
#endregion |
|
443 |
||
444 |
private static object EnsureTypeAssignable(object value, Type initialType, Type targetType) |
|
445 |
{ |
|
446 |
6 |
Type valueType = (value != null) ? value.GetType() : null;
|
447 |
||
448 |
6 |
if (value != null)
|
449 |
{ |
|
450 |
5 |
if (targetType.IsAssignableFrom(valueType))
|
451 |
0 |
return value;
|
452 |
||
453 |
5 |
Func<object, object> castConverter = CastConverters.Get(new TypeConvertKey(valueType, targetType));
|
454 |
5 |
if (castConverter != null)
|
455 |
2 |
return castConverter(value);
|
456 |
} |
|
457 |
else |
|
458 |
{ |
|
459 |
1 |
if (ReflectionUtils.IsNullable(targetType))
|
460 |
0 |
return null;
|
461 |
} |
|
462 |
||
463 |
4 |
throw new Exception("Could not cast or convert from {0} to {1}.".FormatWith(CultureInfo.InvariantCulture, (initialType != null) ? initialType.ToString() : "{null}", targetType));
|
464 |
2 |
}
|
465 |
||
466 |
#if !SILVERLIGHT |
|
467 |
public static object ToValue(INullable nullableValue) |
|
468 |
{ |
|
469 |
0 |
if (nullableValue == null)
|
470 |
0 |
return null;
|
471 |
0 |
else if (nullableValue is SqlInt32)
|
472 |
0 |
return ToValue((SqlInt32)nullableValue);
|
473 |
0 |
else if (nullableValue is SqlInt64)
|
474 |
0 |
return ToValue((SqlInt64)nullableValue);
|
475 |
0 |
else if (nullableValue is SqlBoolean)
|
476 |
0 |
return ToValue((SqlBoolean)nullableValue);
|
477 |
0 |
else if (nullableValue is SqlString)
|
478 |
0 |
return ToValue((SqlString)nullableValue);
|
479 |
0 |
else if (nullableValue is SqlDateTime)
|
480 |
0 |
return ToValue((SqlDateTime)nullableValue);
|
481 |
||
482 |
0 |
throw new Exception("Unsupported INullable type: {0}".FormatWith(CultureInfo.InvariantCulture, nullableValue.GetType()));
|
483 |
0 |
}
|
484 |
#endif |
|
485 |
||
486 |
#if !PocketPC |
|
487 |
internal static TypeConverter GetConverter(Type t) |
|
488 |
{ |
|
489 |
218 |
return JsonTypeReflector.GetTypeConverter(t);
|
490 |
218 |
}
|
491 |
#endif |
|
492 |
||
493 |
public static bool IsInteger(object value) |
|
494 |
{ |
|
495 |
9 |
switch (System.Convert.GetTypeCode(value))
|
496 |
{ |
|
497 |
case TypeCode.SByte: |
|
498 |
case TypeCode.Byte: |
|
499 |
case TypeCode.Int16: |
|
500 |
case TypeCode.UInt16: |
|
501 |
case TypeCode.Int32: |
|
502 |
case TypeCode.UInt32: |
|
503 |
case TypeCode.Int64: |
|
504 |
case TypeCode.UInt64: |
|
505 |
9 |
return true;
|
506 |
default: |
|
507 |
0 |
return false;
|
508 |
} |
|
509 |
9 |
}
|
510 |
} |
|
511 |
} |