395 lines
13 KiB
C#
395 lines
13 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.IO;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Runtime.Serialization;
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using System.Runtime.Serialization.Formatters.Binary;
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using System.Security;
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using System.Xml;
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namespace Umbraco.Core
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{
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internal static class ObjectExtensions
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{
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//private static readonly ConcurrentDictionary<Type, Func<object>> ObjectFactoryCache = new ConcurrentDictionary<Type, Func<object>>();
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public static IEnumerable<T> AsEnumerableOfOne<T>(this T input)
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{
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return Enumerable.Repeat(input, 1);
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}
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public static void DisposeIfDisposable(this object input)
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{
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var disposable = input as IDisposable;
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if (disposable != null) disposable.Dispose();
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}
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/// <summary>
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/// Provides a shortcut way of safely casting an input when you cannot guarantee the <typeparam name="T"></typeparam> is an instance type (i.e., when the C# AS keyword is not applicable)
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="input">The input.</param>
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/// <returns></returns>
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public static T SafeCast<T>(this object input)
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{
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if (ReferenceEquals(null, input) || ReferenceEquals(default(T), input)) return default(T);
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if (input is T) return (T)input;
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return default(T);
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}
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/// <summary>
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/// Tries to convert the input object to the output type using TypeConverters
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="input"></param>
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/// <returns></returns>
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public static Attempt<T> TryConvertTo<T>(this object input)
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{
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var result = TryConvertTo(input, typeof(T));
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return !result.Success ? Attempt<T>.False : new Attempt<T>(true, (T)result.Result);
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}
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/// <summary>
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/// Tries to convert the input object to the output type using TypeConverters. If the destination type is a superclass of the input type,
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/// if will use <see cref="Convert.ChangeType(object,System.Type)"/>.
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/// </summary>
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/// <param name="input">The input.</param>
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/// <param name="destinationType">Type of the destination.</param>
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/// <returns></returns>
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public static Attempt<object> TryConvertTo(this object input, Type destinationType)
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{
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if (input == null) return Attempt<object>.False;
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if (destinationType == typeof(object)) return new Attempt<object>(true, input);
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if (input.GetType() == destinationType) return new Attempt<object>(true, input);
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if (!destinationType.IsGenericType || destinationType.GetGenericTypeDefinition() != typeof(Nullable<>))
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{
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if (TypeHelper.IsTypeAssignableFrom(destinationType, input.GetType())
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&& TypeHelper.IsTypeAssignableFrom<IConvertible>(input))
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{
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var casted = Convert.ChangeType(input, destinationType);
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return new Attempt<object>(true, casted);
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}
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}
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var inputConverter = TypeDescriptor.GetConverter(input);
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if (inputConverter.CanConvertTo(destinationType))
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{
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try
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{
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var converted = inputConverter.ConvertTo(input, destinationType);
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return new Attempt<object>(true, converted);
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}
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catch (Exception e)
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{
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return new Attempt<object>(e);
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}
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}
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if (destinationType == typeof(bool))
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{
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var boolConverter = new CustomBooleanTypeConverter();
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if (boolConverter.CanConvertFrom(input.GetType()))
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{
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try
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{
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var converted = boolConverter.ConvertFrom(input);
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return new Attempt<object>(true, converted);
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}
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catch (Exception e)
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{
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return new Attempt<object>(e);
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}
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}
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}
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var outputConverter = TypeDescriptor.GetConverter(destinationType);
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if (outputConverter.CanConvertFrom(input.GetType()))
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{
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try
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{
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var converted = outputConverter.ConvertFrom(input);
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return new Attempt<object>(true, converted);
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}
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catch (Exception e)
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{
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return new Attempt<object>(e);
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}
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}
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if (TypeHelper.IsTypeAssignableFrom<IConvertible>(input))
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{
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try
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{
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var casted = Convert.ChangeType(input, destinationType);
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return new Attempt<object>(true, casted);
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}
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catch (Exception e)
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{
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return new Attempt<object>(e);
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}
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}
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return Attempt<object>.False;
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}
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public static void CheckThrowObjectDisposed(this IDisposable disposable, bool isDisposed, string objectname)
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{
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//TODO: Localise this exception
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if (isDisposed)
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throw new ObjectDisposedException(objectname);
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}
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//public enum PropertyNamesCaseType
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//{
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// CamelCase,
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// CaseInsensitive
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//}
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///// <summary>
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///// Convert an object to a JSON string with camelCase formatting
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///// </summary>
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///// <param name="obj"></param>
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///// <returns></returns>
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//public static string ToJsonString(this object obj)
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//{
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// return obj.ToJsonString(PropertyNamesCaseType.CamelCase);
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//}
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///// <summary>
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///// Convert an object to a JSON string with the specified formatting
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///// </summary>
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///// <param name="obj">The obj.</param>
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///// <param name="propertyNamesCaseType">Type of the property names case.</param>
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///// <returns></returns>
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//public static string ToJsonString(this object obj, PropertyNamesCaseType propertyNamesCaseType)
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//{
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// var type = obj.GetType();
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// var dateTimeStyle = "yyyy-MM-dd HH:mm:ss";
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// if (type.IsPrimitive || typeof(string).IsAssignableFrom(type))
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// {
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// return obj.ToString();
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// }
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// if (typeof(DateTime).IsAssignableFrom(type) || typeof(DateTimeOffset).IsAssignableFrom(type))
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// {
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// return Convert.ToDateTime(obj).ToString(dateTimeStyle);
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// }
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// var serializer = new JsonSerializer();
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// switch (propertyNamesCaseType)
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// {
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// case PropertyNamesCaseType.CamelCase:
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// serializer.ContractResolver = new CamelCasePropertyNamesContractResolver();
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// break;
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// }
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// var dateTimeConverter = new IsoDateTimeConverter
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// {
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// DateTimeStyles = System.Globalization.DateTimeStyles.None,
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// DateTimeFormat = dateTimeStyle
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// };
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// if (typeof(IDictionary).IsAssignableFrom(type))
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// {
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// return JObject.FromObject(obj, serializer).ToString(Formatting.None, dateTimeConverter);
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// }
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// if (type.IsArray || (typeof(IEnumerable).IsAssignableFrom(type)))
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// {
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// return JArray.FromObject(obj, serializer).ToString(Formatting.None, dateTimeConverter);
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// }
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// return JObject.FromObject(obj, serializer).ToString(Formatting.None, dateTimeConverter);
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//}
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/// <summary>
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/// Converts an object into a dictionary
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <typeparam name="TProperty"></typeparam>
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/// <typeparam name="TVal"> </typeparam>
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/// <param name="o"></param>
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/// <param name="ignoreProperties"></param>
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/// <returns></returns>
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public static IDictionary<string, TVal> ToDictionary<T, TProperty, TVal>(this T o,
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params Expression<Func<T, TProperty>>[] ignoreProperties)
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{
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return o.ToDictionary<TVal>(ignoreProperties.Select(e => o.GetPropertyInfo(e)).Select(propInfo => propInfo.Name).ToArray());
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}
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/// <summary>
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/// Turns object into dictionary
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/// </summary>
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/// <param name="o"></param>
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/// <param name="ignoreProperties">Properties to ignore</param>
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/// <returns></returns>
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public static IDictionary<string, TVal> ToDictionary<TVal>(this object o, params string[] ignoreProperties)
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{
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if (o != null)
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{
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var props = TypeDescriptor.GetProperties(o);
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var d = new Dictionary<string, TVal>();
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foreach (var prop in props.Cast<PropertyDescriptor>().Where(x => !ignoreProperties.Contains(x.Name)))
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{
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var val = prop.GetValue(o);
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if (val != null)
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{
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d.Add(prop.Name, (TVal)val);
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}
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}
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return d;
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}
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return new Dictionary<string, TVal>();
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}
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public static string ToDebugString(this object obj, int levels = 0)
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{
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if (obj == null) return "{null}";
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try
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{
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if (obj is string)
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{
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return "\"{0}\"".InvariantFormat(obj);
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}
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if (obj is int || obj is Int16 || obj is Int64 || obj is double || obj is bool || obj is int? || obj is Int16? || obj is Int64? || obj is double? || obj is bool?)
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{
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return "{0}".InvariantFormat(obj);
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}
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if (obj is Enum)
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{
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return "[{0}]".InvariantFormat(obj);
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}
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if (obj is IEnumerable)
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{
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var enumerable = (obj as IEnumerable);
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var items = (from object enumItem in enumerable let value = GetEnumPropertyDebugString(enumItem, levels) where value != null select value).Take(10).ToList();
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return items.Count() > 0
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? "{{ {0} }}".InvariantFormat(String.Join(", ", items))
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: null;
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}
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var props = obj.GetType().GetProperties();
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if ((props.Count() == 2) && props[0].Name == "Key" && props[1].Name == "Value" && levels > -2)
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{
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try
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{
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var key = props[0].GetValue(obj, null) as string;
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var value = props[1].GetValue(obj, null).ToDebugString(levels - 1);
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return "{0}={1}".InvariantFormat(key, value);
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}
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catch (Exception)
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{
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return "[KeyValuePropertyException]";
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}
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}
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if (levels > -1)
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{
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var items =
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from propertyInfo in props
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let value = GetPropertyDebugString(propertyInfo, obj, levels)
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where value != null
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select "{0}={1}".InvariantFormat(propertyInfo.Name, value);
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return items.Count() > 0
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? "[{0}]:{{ {1} }}".InvariantFormat(obj.GetType().Name, String.Join(", ", items))
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: null;
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}
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}
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catch (Exception ex)
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{
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return "[Exception:{0}]".InvariantFormat(ex.Message);
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}
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return null;
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}
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/// <summary>
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/// Attempts to serialize the value to an XmlString using ToXmlString
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/// </summary>
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/// <param name="value"></param>
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/// <param name="type"></param>
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/// <returns></returns>
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public static Attempt<string> TryConvertToXmlString(this object value, Type type)
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{
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try
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{
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var output = value.ToXmlString(type);
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return new Attempt<string>(true, output);
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}
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catch (NotSupportedException ex)
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{
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return new Attempt<string>(ex);
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}
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}
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/// <summary>
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/// Returns an XmlSerialized safe string representation for the value
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/// </summary>
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/// <param name="value"></param>
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/// <param name="type">The Type can only be a primitive type or Guid and byte[] otherwise an exception is thrown</param>
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/// <returns></returns>
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public static string ToXmlString(this object value, Type type)
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{
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if (type == typeof(string)) return ((string)value).IsNullOrWhiteSpace() ? "" : (string)value;
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if (type == typeof(bool)) return XmlConvert.ToString((bool)value);
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if (type == typeof(byte)) return XmlConvert.ToString((byte)value);
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if (type == typeof(char)) return XmlConvert.ToString((char)value);
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if (type == typeof(DateTime)) return XmlConvert.ToString((DateTime)value, XmlDateTimeSerializationMode.RoundtripKind);
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if (type == typeof(DateTimeOffset)) return XmlConvert.ToString((DateTimeOffset)value);
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if (type == typeof(decimal)) return XmlConvert.ToString((decimal)value);
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if (type == typeof(double)) return XmlConvert.ToString((double)value);
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if (type == typeof(float)) return XmlConvert.ToString((float)value);
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if (type == typeof(Guid)) return XmlConvert.ToString((Guid)value);
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if (type == typeof(int)) return XmlConvert.ToString((int)value);
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if (type == typeof(long)) return XmlConvert.ToString((long)value);
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if (type == typeof(sbyte)) return XmlConvert.ToString((sbyte)value);
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if (type == typeof(short)) return XmlConvert.ToString((short)value);
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if (type == typeof(TimeSpan)) return XmlConvert.ToString((TimeSpan)value);
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if (type == typeof(bool)) return XmlConvert.ToString((bool)value);
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if (type == typeof(uint)) return XmlConvert.ToString((uint)value);
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if (type == typeof(ulong)) return XmlConvert.ToString((ulong)value);
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if (type == typeof(ushort)) return XmlConvert.ToString((ushort)value);
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throw new NotSupportedException("Cannot convert type " + type.FullName + " to a string using ToXmlString as it is not supported by XmlConvert");
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}
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private static string GetEnumPropertyDebugString(object enumItem, int levels)
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{
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try
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{
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return enumItem.ToDebugString(levels - 1);
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}
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catch (Exception)
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{
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return "[GetEnumPartException]";
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}
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}
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private static string GetPropertyDebugString(PropertyInfo propertyInfo, object obj, int levels)
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{
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try
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{
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return propertyInfo.GetValue(obj, null).ToDebugString(levels - 1);
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}
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catch (Exception)
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{
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return "[GetPropertyValueException]";
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}
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}
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}
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} |