/// <summary>
/// Returns an object representing the given <see cref="Type"/>.
/// </summary>
/// <param name="content">
/// The <see cref="IPublishedContent"/> to convert.
/// </param>
/// <param name="type">
/// The <see cref="Type"/> of items to return.
/// </param>
/// <param name="culture">
/// The <see cref="CultureInfo"/>
/// </param>
/// <param name="instance">
/// An existing instance of T to populate
/// </param>
/// <param name="valueResolverContexts">
/// A collection of <see cref="DittoValueResolverContext"/> entities to use whilst resolving values.
/// </param>
/// <param name="onConverting">
/// The <see cref="Action{ConversionHandlerContext}"/> to fire when converting.
/// </param>
/// <param name="onConverted">
/// The <see cref="Action{ConversionHandlerContext}"/> to fire when converted.
/// </param>
/// <returns>
/// The converted <see cref="Object"/> as the given type.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Thrown if the given type has invalid constructors.
/// </exception>
private static object ConvertContent(
IPublishedContent content,
Type type,
CultureInfo culture = null,
object instance = null,
IEnumerable <DittoValueResolverContext> valueResolverContexts = null,
Action <DittoConversionHandlerContext> onConverting = null,
Action <DittoConversionHandlerContext> onConverted = null)
{
// Check if the culture has been set, otherwise use from Umbraco, or fallback to a default
if (culture == null)
{
if (UmbracoContext.Current != null && UmbracoContext.Current.PublishedContentRequest != null)
{
culture = UmbracoContext.Current.PublishedContentRequest.Culture;
}
else
{
// Fallback
culture = CultureInfo.CurrentCulture;
}
}
// Get the default constructor, parameters and create an instance of the type.
// Try and return from the cache first. TryGetValue is faster than GetOrAdd.
ParameterInfo[] constructorParams;
ConstructorCache.TryGetValue(type, out constructorParams);
bool hasParameter = false;
if (constructorParams == null)
{
var constructor = type.GetConstructors().OrderBy(x => x.GetParameters().Length).FirstOrDefault();
if (constructor != null)
{
constructorParams = constructor.GetParameters();
ConstructorCache.TryAdd(type, constructorParams);
}
}
// If not already an instance, create an instance of the object
if (instance == null)
{
if (constructorParams != null && constructorParams.Length == 0)
{
// Internally this uses Activator.CreateInstance which is heavily optimized.
instance = type.GetInstance();
}
else if (constructorParams != null && constructorParams.Length == 1 & constructorParams[0].ParameterType == typeof(IPublishedContent))
{
// This extension method is about 7x faster than the native implementation.
instance = type.GetInstance(content);
hasParameter = true;
}
else
{
// No valid constructor, but see if the value can be cast to the type
if (type.IsInstanceOfType(content))
{
instance = content;
}
else
{
throw new InvalidOperationException(string.Format("Can't convert IPublishedContent to {0} as it has no valid constructor. A valid constructor is either an empty one, or one accepting a single IPublishedContent parameter.", type));
}
}
}
// Collect all the properties of the given type and loop through writable ones.
PropertyInfo[] virtualProperties;
PropertyInfo[] nonVirtualProperties;
VirtualPropertyCache.TryGetValue(type, out virtualProperties);
PropertyCache.TryGetValue(type, out nonVirtualProperties);
if (virtualProperties == null && nonVirtualProperties == null)
{
var properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.CanWrite).ToArray();
// Split out the properties.
virtualProperties = properties.Where(p => p.IsVirtualAndOverridable()).ToArray();
nonVirtualProperties = properties.Except(virtualProperties).ToArray();
VirtualPropertyCache.TryAdd(type, virtualProperties);
PropertyCache.TryAdd(type, nonVirtualProperties);
}
// A dictionary to store lazily invoked values.
var lazyProperties = new Dictionary <string, Lazy <object> >();
// If there are any virtual properties we want to lazily invoke them.
if (virtualProperties != null && virtualProperties.Any())
{
foreach (var propertyInfo in virtualProperties)
{
using (DittoDisposableTimer.DebugDuration <object>(string.Format("ForEach Virtual Property ({1} {0})", propertyInfo.Name, content.Id)))
{
// Check for the ignore attribute.
var ignoreAttr = propertyInfo.GetCustomAttribute <DittoIgnoreAttribute>();
if (ignoreAttr != null)
{
continue;
}
// Create a Lazy<object> to deferr returning our value.
var deferredPropertyInfo = propertyInfo;
var localInstance = instance;
lazyProperties.Add(
propertyInfo.Name,
new Lazy <object>(
() =>
{
// Get the value from Umbraco.
object propertyValue = GetResolvedValue(content, culture, deferredPropertyInfo, localInstance, valueResolverContexts);
return(GetConvertedValue(content, culture, deferredPropertyInfo, propertyValue, localInstance));
}));
}
}
// Create a proxy instance to replace our object.
var interceptor = new LazyInterceptor(instance, lazyProperties);
var factory = new ProxyFactory();
instance = hasParameter
? factory.CreateProxy(type, interceptor, content)
: factory.CreateProxy(type, interceptor);
}
// We have the instance object but haven't yet populated properties
// so fire the on converting event handlers
OnConverting(content, type, instance, onConverting);
// Now loop through and convert non-virtual properties.
if (nonVirtualProperties != null && nonVirtualProperties.Any())
{
foreach (var propertyInfo in nonVirtualProperties)
{
using (DittoDisposableTimer.DebugDuration <object>(string.Format("ForEach Property ({1} {0})", propertyInfo.Name, content.Id)))
{
// Check for the ignore attribute.
var ignoreAttr = propertyInfo.GetCustomAttribute <DittoIgnoreAttribute>();
if (ignoreAttr != null)
{
continue;
}
// Set the value normally.
// ReSharper disable once PossibleMultipleEnumeration
object propertyValue = GetResolvedValue(content, culture, propertyInfo, instance, valueResolverContexts);
object result = GetConvertedValue(content, culture, propertyInfo, propertyValue, instance);
propertyInfo.SetValue(instance, result, null);
}
}
}
// We have now finished populating the instance object so go ahead
// and fire the on converted event handlers
OnConverted(content, type, instance, onConverted);
return(instance);
}
/// <summary>
/// Returns an object representing the given <see cref="Type"/>.
/// </summary>
/// <param name="content">
/// The <see cref="IPublishedContent"/> to convert.
/// </param>
/// <param name="type">
/// The <see cref="Type"/> of items to return.
/// </param>
/// <param name="culture">The <see cref="CultureInfo"/></param>
/// <returns>
/// The converted <see cref="Object"/> as the given type.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Thrown if the given type has invalid constructors.
/// </exception>
private static object GetTypedProperty(
IPublishedContent content,
Type type,
CultureInfo culture = null)
{
// Check if the culture has been set, otherwise use from Umbraco, or fallback to a default
if (culture == null)
{
if (UmbracoContext.Current != null && UmbracoContext.Current.PublishedContentRequest != null)
{
culture = UmbracoContext.Current.PublishedContentRequest.Culture;
}
else
{
// Fallback
culture = CultureInfo.CurrentCulture;
}
}
// Get the default constructor, parameters and create an instance of the type.
// Try and return from the cache first. TryGetValue is faster than GetOrAdd.
ParameterInfo[] constructorParams;
ConstructorCache.TryGetValue(type, out constructorParams);
bool hasParameter = false;
if (constructorParams == null)
{
var constructor = type.GetConstructors().OrderBy(x => x.GetParameters().Length).First();
constructorParams = constructor.GetParameters();
ConstructorCache.TryAdd(type, constructorParams);
}
object instance;
if (constructorParams.Length == 0)
{
// Internally this uses Activator.CreateInstance which is heavily optimized.
instance = type.GetInstance();
}
else if (constructorParams.Length == 1 & constructorParams[0].ParameterType == typeof(IPublishedContent))
{
// This extension method is about 7x faster than the native implementation.
instance = type.GetInstance(content);
hasParameter = true;
}
else
{
throw new InvalidOperationException("Type {0} has invalid constructor parameters");
}
// Collect all the properties of the given type and loop through writable ones.
PropertyInfo[] virtualProperties;
PropertyInfo[] nonVirtualProperties;
VirtualPropertyCache.TryGetValue(type, out virtualProperties);
PropertyCache.TryGetValue(type, out nonVirtualProperties);
if (virtualProperties == null && nonVirtualProperties == null)
{
var properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance)
.Where(x => x.CanWrite).ToArray();
// Split out the properties.
virtualProperties = properties.Where(p => p.IsVirtualAndOverridable()).ToArray();
nonVirtualProperties = properties.Except(virtualProperties).ToArray();
VirtualPropertyCache.TryAdd(type, virtualProperties);
PropertyCache.TryAdd(type, nonVirtualProperties);
}
// A dictionary to store lazily invoked values.
var lazyProperties = new Dictionary <string, Lazy <object> >();
// If there are any virtual properties we want to lazily invoke them.
if (virtualProperties != null && virtualProperties.Any())
{
foreach (var propertyInfo in virtualProperties)
{
using (DisposableTimer.DebugDuration <object>(string.Format("ForEach Virtual Property ({1} {0})", propertyInfo.Name, content.Id), "Complete"))
{
// Check for the ignore attribute.
var ignoreAttr = propertyInfo.GetCustomAttribute <DittoIgnoreAttribute>();
if (ignoreAttr != null)
{
continue;
}
// Create a Lazy<object> to deferr returning our value.
var deferredPropertyInfo = propertyInfo;
var localInstance = instance;
lazyProperties.Add(
propertyInfo.Name,
new Lazy <object>(
() =>
{
// Get the value from Umbraco.
object propertyValue = GetRawValue(content, culture, deferredPropertyInfo, localInstance);
return(GetTypedValue(content, culture, deferredPropertyInfo, propertyValue, localInstance));
}));
}
}
// Create a proxy instance to replace our object.
LazyInterceptor interceptor = new LazyInterceptor(instance, lazyProperties);
ProxyFactory factory = new ProxyFactory();
instance = hasParameter
? factory.CreateProxy(type, interceptor, content)
: factory.CreateProxy(type, interceptor);
}
// Now loop through and convert non-virtual properties.
if (nonVirtualProperties != null && nonVirtualProperties.Any())
{
foreach (var propertyInfo in nonVirtualProperties)
{
using (DisposableTimer.DebugDuration <object>(string.Format("ForEach Property ({1} {0})", propertyInfo.Name, content.Id), "Complete"))
{
// Check for the ignore attribute.
var ignoreAttr = propertyInfo.GetCustomAttribute <DittoIgnoreAttribute>();
if (ignoreAttr != null)
{
continue;
}
// Set the value normally.
object propertyValue = GetRawValue(content, culture, propertyInfo, instance);
var result = GetTypedValue(content, culture, propertyInfo, propertyValue, instance);
propertyInfo.SetValue(instance, result, null);
}
}
}
return(instance);
}
