/// <summary>
/// Transforms the value of the specified property by using transformation attributes.
/// </summary>
/// <param name="transformationSource">The transformation source.</param>
/// <param name="propertyName">Name of the property.</param>
/// <param name="propertyValue">The property value.</param>
/// <param name="transformationContext">The transformation context.</param>
public static void TransformAttributes(this ITransformable transformationSource, string propertyName, object propertyValue, string transformationContext)
{
transformationSource.CannotBeNull();
propertyName.CannotBeNullOrEmpty();
var propertyData = ReflectionExtensions.GetProperties(transformationSource.GetType())[propertyName];
var propertyInfo = propertyData.PropertyInfo;
var transformationAttributes = propertyData.TransformationAttributes;
// perform attribute based transformation
foreach (var transformationAttribute in transformationAttributes)
{
// only matching transformation context gets transformed
if (transformationAttribute.TransformationContext == transformationContext)
{
// custom tranformations might cause exceptions that are hard to find
try
{
propertyValue = transformationAttribute.Transform(propertyValue);
propertyInfo.SetValue(transformationSource, propertyValue);
}
catch (Exception ex)
{
throw new TransformationErrorException("Unhandeled transformation exception occured.", transformationAttribute.GetType(), transformationSource.GetType(), propertyName, ex);
}
}
}
}
/// <summary>
/// Transforms the specified property of the specified transformation source.
/// </summary>
/// <param name="transformationSource">The transformation source.</param>
/// <param name="propertyName">Name of the property.</param>
public static void Transform(this ITransformable transformationSource, string propertyName)
{
transformationSource.CannotBeNull();
propertyName.CannotBeNullOrEmpty();
List <string> transformationContexts;
object propertyValue;
// get property value
var properties = ReflectionExtensions.GetProperties(transformationSource.GetType());
if (properties.TryGetValue(propertyName, out PropertyData propertyData))
{
if (propertyData.PropertyInfo.CanRead &&
propertyData.PropertyInfo.CanWrite)
{
propertyValue = propertyData.PropertyInfo.GetValue(transformationSource);
// get transformation context
transformationContexts = new List <string>();
transformationContexts.Add(TransformationContext.Default); // always add the default transformation context
transformationContexts.AddRange(transformationSource.GetActiveTransformationContexts() ?? Array.Empty <string>()); // add currently active transformation contexts
transformationContexts = transformationContexts.Distinct().ToList();
foreach (var transformationContext in transformationContexts)
{
transformationSource.Transform(propertyName, propertyValue, transformationContext);
}
}
}
}
/// <summary>
/// Transforms the the properties of the specified transformation source.
/// </summary>
/// <param name="transformationSource">The transformation source.</param>
public static void Transform(this ITransformable transformationSource)
{
transformationSource.CannotBeNull();
var propertyNames = ReflectionExtensions.GetProperties(transformationSource.GetType()).Keys;
foreach (var propertyName in propertyNames)
{
transformationSource.Transform(propertyName);
}
}
