RaspberryIO_26/Swan.Lite/Extensions.cs

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C#
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2019-12-04 18:57:18 +01:00
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Swan.Lite.Reflection;
using Swan.Mappers;
using Swan.Reflection;
namespace Swan
{
/// <summary>
/// Extension methods.
/// </summary>
public static partial class Extensions
{
/// <summary>
/// Iterates over the public, instance, readable properties of the source and
/// tries to write a compatible value to a public, instance, writable property in the destination.
/// </summary>
/// <typeparam name="T">The type of the source.</typeparam>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <param name="ignoreProperties">The ignore properties.</param>
/// <returns>
/// Number of properties that was copied successful.
/// </returns>
public static int CopyPropertiesTo<T>(this T source, object target, params string[]? ignoreProperties)
where T : class =>
ObjectMapper.Copy(source, target, GetCopyableProperties(target), ignoreProperties);
/// <summary>
/// Iterates over the public, instance, readable properties of the source and
/// tries to write a compatible value to a public, instance, writable property in the destination.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="target">The destination.</param>
/// <param name="propertiesToCopy">Properties to copy.</param>
/// <returns>
/// Number of properties that were successfully copied.
/// </returns>
public static int CopyOnlyPropertiesTo(this object source, object target, params string[]? propertiesToCopy)
=> ObjectMapper.Copy(source, target, propertiesToCopy);
/// <summary>
/// Copies the properties to new instance of T.
/// </summary>
/// <typeparam name="T">The new object type.</typeparam>
/// <param name="source">The source.</param>
/// <param name="ignoreProperties">The ignore properties.</param>
/// <returns>
/// The specified type with properties copied.
/// </returns>
/// <exception cref="ArgumentNullException">source.</exception>
public static T CopyPropertiesToNew<T>(this object source, string[]? ignoreProperties = null)
where T : class
{
if (source == null)
throw new ArgumentNullException(nameof(source));
var target = Activator.CreateInstance<T>();
ObjectMapper.Copy(source, target, GetCopyableProperties(target), ignoreProperties);
return target;
}
/// <summary>
/// Copies the only properties to new instance of T.
/// </summary>
/// <typeparam name="T">Object Type.</typeparam>
/// <param name="source">The source.</param>
/// <param name="propertiesToCopy">The properties to copy.</param>
/// <returns>
/// The specified type with properties copied.
/// </returns>
/// <exception cref="ArgumentNullException">source.</exception>
public static T CopyOnlyPropertiesToNew<T>(this object source, params string[] propertiesToCopy)
where T : class
{
if (source == null)
throw new ArgumentNullException(nameof(source));
var target = Activator.CreateInstance<T>();
ObjectMapper.Copy(source, target, propertiesToCopy);
return target;
}
/// <summary>
/// Iterates over the keys of the source and tries to write a compatible value to a public,
/// instance, writable property in the destination.
/// </summary>
/// <param name="source">The source.</param>
/// <param name="target">The target.</param>
/// <param name="ignoreKeys">The ignore keys.</param>
/// <returns>Number of properties that was copied successful.</returns>
public static int CopyKeyValuePairTo(
this IDictionary<string, object> source,
object target,
params string[] ignoreKeys) =>
source == null
? throw new ArgumentNullException(nameof(source))
: ObjectMapper.Copy(source, target, null, ignoreKeys);
/// <summary>
/// Iterates over the keys of the source and tries to write a compatible value to a public,
/// instance, writable property in the destination.
/// </summary>
/// <typeparam name="T">Object Type.</typeparam>
/// <param name="source">The source.</param>
/// <param name="ignoreKeys">The ignore keys.</param>
/// <returns>
/// The specified type with properties copied.
/// </returns>
public static T CopyKeyValuePairToNew<T>(
this IDictionary<string, object> source,
params string[] ignoreKeys)
{
if (source == null)
throw new ArgumentNullException(nameof(source));
var target = Activator.CreateInstance<T>();
source.CopyKeyValuePairTo(target, ignoreKeys);
return target;
}
/// <summary>
/// Does the specified action.
/// </summary>
/// <param name="action">The action.</param>
/// <param name="retryInterval">The retry interval.</param>
/// <param name="retryCount">The retry count.</param>
public static void Retry(
this Action action,
TimeSpan retryInterval = default,
int retryCount = 3)
{
if (action == null)
throw new ArgumentNullException(nameof(action));
Retry<object?>(() =>
{
action();
return null;
},
retryInterval,
retryCount);
}
/// <summary>
/// Does the specified action.
/// </summary>
/// <typeparam name="T">The type of the source.</typeparam>
/// <param name="action">The action.</param>
/// <param name="retryInterval">The retry interval.</param>
/// <param name="retryCount">The retry count.</param>
/// <returns>
/// The return value of the method that this delegate encapsulates.
/// </returns>
/// <exception cref="ArgumentNullException">action.</exception>
/// <exception cref="AggregateException">Represents one or many errors that occur during application execution.</exception>
public static T Retry<T>(
this Func<T> action,
TimeSpan retryInterval = default,
int retryCount = 3)
{
if (action == null)
throw new ArgumentNullException(nameof(action));
if (retryInterval == default)
retryInterval = TimeSpan.FromSeconds(1);
var exceptions = new List<Exception>();
for (var retry = 0; retry < retryCount; retry++)
{
try
{
if (retry > 0)
Task.Delay(retryInterval).Wait();
return action();
}
catch (Exception ex)
{
exceptions.Add(ex);
}
}
throw new AggregateException(exceptions);
}
/// <summary>
/// Gets the copyable properties.
///
/// If there is no properties with the attribute <c>AttributeCache</c> returns all the properties.
/// </summary>
/// <param name="this">The object.</param>
/// <returns>
/// Array of properties.
/// </returns>
/// <exception cref="ArgumentNullException">model.</exception>
/// <seealso cref="AttributeCache"/>
public static IEnumerable<string> GetCopyableProperties(this object @this)
{
if (@this == null)
throw new ArgumentNullException(nameof(@this));
var collection = PropertyTypeCache.DefaultCache.Value
.RetrieveAllProperties(@this.GetType(), true);
var properties = collection
.Select(x => new
{
x.Name,
HasAttribute = AttributeCache.DefaultCache.Value.RetrieveOne<CopyableAttribute>(x) != null,
})
.Where(x => x.HasAttribute)
.Select(x => x.Name);
return properties.Any()
? properties
: collection.Select(x => x.Name);
}
internal static void CreateTarget(
this object source,
Type targetType,
bool includeNonPublic,
ref object? target)
{
switch (source)
{
// do nothing. Simply skip creation
case string _:
break;
// When using arrays, there is no default constructor, attempt to build a compatible array
case IList sourceObjectList when targetType.IsArray:
var elementType = targetType.GetElementType();
if (elementType != null)
target = Array.CreateInstance(elementType, sourceObjectList.Count);
break;
default:
var constructors = ConstructorTypeCache.DefaultCache.Value
.RetrieveAllConstructors(targetType, includeNonPublic);
// Try to check if empty constructor is available
if (constructors.Any(x => x.Item2.Length == 0))
{
target = Activator.CreateInstance(targetType, includeNonPublic);
}
else
{
var firstCtor = constructors
.OrderBy(x => x.Item2.Length)
.FirstOrDefault();
target = Activator.CreateInstance(targetType,
firstCtor?.Item2.Select(arg => arg.GetType().GetDefault()).ToArray());
}
break;
}
}
internal static string GetNameWithCase(this string name, JsonSerializerCase jsonSerializerCase) =>
jsonSerializerCase switch
{
JsonSerializerCase.PascalCase => char.ToUpperInvariant(name[0]) + name.Substring(1),
JsonSerializerCase.CamelCase => char.ToLowerInvariant(name[0]) + name.Substring(1),
JsonSerializerCase.None => name,
_ => throw new ArgumentOutOfRangeException(nameof(jsonSerializerCase), jsonSerializerCase, null)
};
}
}