/// <summary>Gets a value for the property from the container</summary>
/// <param name="container">container</param>
/// <param name="lazyDefaultFactory">default value factory delegate to create the default value if the value is not yet present as an extended property</param>
/// <returns>Value retrieved from the property or default value created by <paramref name="lazyDefaultFactory"/> if it wasn't found</returns>
/// <remarks>If the value didn't exist a new value created by calling with <paramref name="lazyDefaultFactory"/> is added to the container</remarks>
public T GetValueFrom([ValidatedNotNull] IExtensiblePropertyContainer container, Func <T> lazyDefaultFactory)
{
container.ValidateNotNull(nameof(container));
lazyDefaultFactory.ValidateNotNull(nameof(lazyDefaultFactory));
if (container.TryGetExtendedPropertyValue(Name, out T retVal))
{
return(retVal);
}
retVal = lazyDefaultFactory( );
container.AddExtendedPropertyValue(Name, retVal);
return(retVal);
}
public T GetValueFrom([ValidatedNotNull] IExtensiblePropertyContainer container, LazyDefaultFactory lazyDefaultFactory)
{
container.ValidateNotNull(nameof(container));
lazyDefaultFactory.ValidateNotNull(nameof(lazyDefaultFactory));
if (container.TryGetExtendedPropertyValue(Name, out T existingValue))
{
return(existingValue);
}
var defaultValue = lazyDefaultFactory( );
container.AddExtendedPropertyValue(Name, defaultValue);
return(defaultValue);
}
/// <summary>Gets a value for the property from the container</summary>
/// <param name="container">container</param>
/// <param name="lazyDefaultFactory">default value factory delegate to create the default value if the value is not yet present as an extended property</param>
/// <returns>Value retrieved from the property or default value created by <paramref name="lazyDefaultFactory"/> if it wasn't found</returns>
/// <remarks>If the value didn't exist a new value created by calling with <paramref name="lazyDefaultFactory"/> is added to the container</remarks>
public T GetValueFrom(IExtensiblePropertyContainer container, Func <T> lazyDefaultFactory)
{
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
if (lazyDefaultFactory == null)
{
throw new ArgumentNullException(nameof(lazyDefaultFactory));
}
if (container.TryGetExtendedPropertyValue(Name, out T retVal))
{
return(retVal);
}
retVal = lazyDefaultFactory( );
container.AddExtendedPropertyValue(Name, retVal);
return(retVal);
}