/// <summary>
/// Legt <paramref name="property"/> in <paramref name="destinationObject"/> auf den Wert von <paramref name="sourceObject"/>
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <param name="destinationObject"></param>
/// <param name="sourceObject"></param>
/// <param name="property"></param>
private static void SetPropertyValue <T1>(T1 destinationObject, object sourceObject, PropertyInfo property)
{
try
{
if (property.EvaluateAttribute <IgnoreAtMerging>(IgnoreAtMerging.DefaultValue))
// If true This property is ignored
{
return;
}
if (!property.EvaluateAttribute <IsMergeable>(IsMergeable.DefaultValue))
//!AttributeEvaluator.IsMergeable(Attribute.GetCustomAttributes(property)))
{
property.SetValue(destinationObject, property.GetValue(sourceObject, null), null);
}
// Falls die Property im Ziel nicht initialisiert ist -> kopieren
else if (property.GetValue(destinationObject) == null) // Irgendein ISKills lässt das hier abstürzen
{
property.SetValue(destinationObject, property.GetValue(sourceObject, null), null);
}
// Falls beide Properties informationen enthalten -> zusammenführen versuchen
else if (property.GetValue(sourceObject) != null && property.GetValue(destinationObject) != null)
{
var initialValue = property.GetValue(destinationObject);
var mergedInformation = MergeObjects(initialValue, property.GetValue(sourceObject));
if (!initialValue.Equals(mergedInformation)) // Only set if value is new
{
property.SetValue(destinationObject, mergedInformation, null);
}
}
}
catch (TargetInvocationException e)
{
Debug.WriteLine(e);
}
catch (TargetParameterCountException e)
{
Debug.WriteLine(e);
}
catch (Exception exception)
{
ObjectMergerLogger.GetInstance().Error(exception);
}
}
/// <summary>
/// Fügt Informationen von mehreren Objekten in ein neues Objekt ein
/// ACHTUNG !!!! Diese Funktion verändert im momentanen Zustand den Übergabeparameter !!!!
/// </summary>
/// <param name="destination"></param>
/// <param name="source"></param>
/// <param name="parent"></param>
/// <returns></returns>
public static T1 MergeObjects <T1>(T1 destination, object source, object parent = null)
{
T1 result; // = Activator.CreateInstance<T>();
if (ReferenceEquals(destination, source))
{
return(destination);
}
else if (destination == null && source == null)
{
return(default(T1));
}
else if (source == null)
{
return(destination);
}
else if (destination == null)
{
return((T1)source);
}
// Replace one Object if they aren't Mergeable
else if (!destination.GetType().EvaluateAttribute <IsMergeable>(IsMergeable.DefaultValue))
//!AttributeEvaluator.IsMergeable(new Type[]{destination.GetType()})) // Falls die übergebenen Klassen nicht mit dem IsMergeable attribut assoziiert wurden
{
// If destination is default constructed, do copy new one
if (destination.IsDefaultConstructed() && !source.IsDefaultConstructed())
{
ObjectMergerLogger.GetInstance().Debug("Overriding \"{0}\" with new value \"{1}\"", destination, source);
return((T1)source);
}
// If source is default constructed do not copy new one
else if (source.IsDefaultConstructed())
{
return(destination);
}
// if nothing is default, take the new one
else
{
return((T1)source);
}
}
Type destinationType = destination.GetType();
Type sourceType = source.GetType();
Type commonType = destinationType.FindEqualTypeWith(sourceType);
// Resolve hierarchy recursions
var redirectedSourceItems = RedirectRecursions(source, null);
var redirectedDestinationItems = RedirectRecursions(destination, null);
// Falls das Objekt ein Primitiver datentyp ist
// Wird als erstes abgeprüft, da dies der häufigste Fall ist
if (destinationType.IsValueType)
{
// Falls der Datentyp Primitive ist, wird der neue Wert genommen
result = (T1)source;
}
else if (destinationType == typeof(string))
// Da Strings vom Type IEnumerable<Char> sind, müssen diese vorher abgefangen werden
{
result = (T1)source;
}
else if (typeof(MemberInfo).IsAssignableFrom(commonType)) // Member Infos machen immer wieder probleme
{
string parentString = parent != null?parent.ToString() : "unknown parent";
string memberString = ((MemberInfo)source).Name;
ObjectMergerLogger.GetInstance().Warning("Member info \"{0}\" in \"{1}\" was copied", memberString, parentString);
result = (T1)source;
}
else if (typeof(Delegate).IsAssignableFrom(commonType))
// Delegaten können zwar kopiert werden, sind aber evtl. nicht sinnvoll, da sie ihren ursprünglichen Besitzer referenzieren
{
string parentString = parent != null?parent.ToString() : "unknown parent";
string memberString = ((Delegate)source).Method.Name;
ObjectMergerLogger.GetInstance().Warning(
"Member info \"{0}\" in \"{1}\" was copied. \n The Reference to its original parent may remain.",
memberString, parentString);
result = (T1)source;
}
else if (commonType.IsGenericType && typeof(Dictionary <,>) == commonType.GetGenericTypeDefinition())
//Dictionaries behandeln
{
Type enumerationType1 = commonType.GetGenericArguments()[0];
Type enumerationType2 = commonType.GetGenericArguments()[1];
// I want to create a List<?> containing the existing
// object, but strongly typed to the "right" type depending
// on the type of the value of x
MethodInfo method = typeof(MergingHelper).GetMethod("MergeDictionaries",
BindingFlags.NonPublic | BindingFlags.Static); // todo: String per referenz ermitteln
//MethodInfo method = SymbolExtensions.GetMethodInfo(() => MergingHelper.MergeDictionaries<T,T>(destination, source));
method = method.MakeGenericMethod(new Type[] { enumerationType1, enumerationType2 });
var mergedIEnumerable = method.Invoke(null, new[] { destination, source });
result = (T1)mergedIEnumerable;
}
// Allgemeine Methode für Listen
else if (typeof(ICollection).IsAssignableFrom(commonType))
//(destinationType == typeof(IEnumerable<object>))
{
Type enumerationType = destinationType.GetEnumerableType();
MethodInfo method = typeof(MergingHelper).GetMethod("MergeIEnumerables",
BindingFlags.NonPublic | BindingFlags.Static); // todo: String per referenz ermitteln
//MethodInfo method =
// SymbolExtensions.GetMethodInfo(() => MergingHelper.MergeIEnumerables(destination, source, true));
// Sowohl der Container, als auch die beinhalteten Elemente müssen Duplizierung zulassen
bool duplicatesAllowed =
destinationType.EvaluateAttribute <DuplicatesAllowed>(DuplicatesAllowed.DefaultValue) &&
enumerationType.EvaluateAttribute <DuplicatesAllowed>(DuplicatesAllowed.DefaultValue);
method = method.MakeGenericMethod(new Type[] { enumerationType });
var mergedIEnumerable = method.Invoke(null,
new[] { destination, source, duplicatesAllowed });
// todo : Attribute Container übergeben, damit das flexibler ist
if (commonType.GetConstructor(new[] { mergedIEnumerable.GetType() }) != null)
{
result = (T1)Activator.CreateInstance(commonType, new object[] { mergedIEnumerable });
}
else
{
result = (T1)mergedIEnumerable;
}
}
// Ansonsten ist der Datentyp weder Primitiv noch eine Liste, somit mir rekursiv weiter das Standardverfahren angewendet
else
{
result = MergeObjectFields(destination, source);
result = MergeObjectProperties(result, source);
}
RedirectRecursions(redirectedDestinationItems, destination);
RedirectRecursions(redirectedSourceItems, source);
return(result);
}
private IEnumerable <ObjectTreeItem> CreateChildLayer()
{
if (Item == null)
{
yield break;
}
else if (Item.GetType().IsPrimitive)
{
yield break;
}
else if (TypesNotToParse.Any(type => type == Item.GetType()))
{
yield break;
}
else if (TypesNotToParse.Any(type => type.IsInstanceOfType(Item)))
{
yield break;
}
else if (
// handle all IEnumberable types from mscorlib as IEnumberables
(Item is IEnumerable && Item.GetType().Assembly.GetName().Name == "mscorlib") ||
// handle all generic types, which derive from special IEnumerables as IEnumberable
(Item.GetType().IsGenericType&& SpecialIEnumberables.Any(type => type.IsAssignableFrom(Item.GetType().GetGenericTypeDefinition()))) ||
// handle all self-defined-non-generic types, which derive from special IEnumerables as IEnumberable
(SpecialIEnumberables.Any(type =>
{
var baseType = Item.GetType().FindGenericBaseClassWith(type);
return(baseType != null && typeof(IEnumerable).IsAssignableFrom(baseType));
}))
)
{
foreach (var listEntry in (IEnumerable)Item)
{
var childTreeItem = new ObjectTreeItem(listEntry);
childTreeItem.Parent = this;
//childTreeItem.MemberInfo = fieldInfo;
yield return(childTreeItem);
}
yield break;
}
// Parse fields
foreach (var fieldInfo in Item.GetType().GetFields())
{
var childValue = fieldInfo.GetValue(Item);
var childTreeItem = new ObjectTreeItem(childValue);
childTreeItem.Parent = this;
childTreeItem.MemberInfo = fieldInfo;
yield return(childTreeItem);
}
// parse Properties
foreach (var propertyInfo in Item.GetType().GetProperties().Where(info => info.CanRead))
{
object childValue = null;
try
{
childValue = propertyInfo.GetValue(Item);
}
catch (TargetInvocationException e)
{
Debug.WriteLine(e);
}
catch (TargetParameterCountException e)
{
Debug.WriteLine(e);
}
catch (Exception exception)
{
ObjectMergerLogger.GetInstance().Error(exception);
}
var childTreeItem = new ObjectTreeItem(childValue);
childTreeItem.Parent = this;
childTreeItem.MemberInfo = propertyInfo;
yield return(childTreeItem);
}
}
