static object Clone(object instance, VisitedGraph visited, object clone)
{
if (visited.ContainsKey(instance))
{
return(visited[instance]);
}
visited.Add(instance, clone);
Type type = instance.GetType();
while (type != null)
{
var ta = TypeAccessor.GetAccessor(type);
foreach (FieldInfo field in type.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
object value = ta.GetField(field.Name, instance);
object cloneValue = visited.ContainsKey(value) ? visited[value] : Clone(value, visited);
ta.SetField(field.Name, clone, cloneValue);
}
type = type.BaseType;
}
return(clone);
}
/// <summary>
/// Creates a deep copy of an object using the supplied dictionary of visited objects as
/// a source of objects already encountered in the copy traversal. The dictionary of visited
/// objects is used for holding objects that have already been copied, to avoid erroneous
/// duplication of parts of the object graph.
/// </summary>
/// <param name="instance">The object to be copied.</param>
/// <param name="visited">The graph of objects visited so far.</param>
/// <param name="copy">The object to copy to.</param>
/// <param name="expectedType">The type that should be found.</param>
/// <param name="overrideSettings">Settings to override the copy logic.</param>
/// <typeparam name="T">The type of the instance given.</typeparam>
/// <returns>The copied object.</returns>
private static T Clone <T>(this T instance, VisitedGraph visited, T copy, Type expectedType, IList <ICopyOverrideSettings> overrideSettings = null)
{
if (ShouldUseVisitedGraph(overrideSettings))
{
if (visited.ContainsKey(instance))
{
return((T)visited[instance]);
}
else
{
visited.Add(instance, copy);
}
}
Type type = instance.GetType();
string instanceTypeNameString = type.FullName;
bool shouldSkip = CheckIfShouldSkip(overrideSettings, type.FullName, false);
if (shouldSkip)
{
return(default(T));
}
BindingFlags flags = overrideSettings?.Any(s => s.IncludeNonPublic) ?? true
? BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance
: BindingFlags.Public | BindingFlags.Instance;
while (type != null)
{
List <ICopyOverrideSettings> currentSettings = overrideSettings?.Where(s => s.ContainingClassType.IsAssignableFrom(type))
.ToList() ?? new List <ICopyOverrideSettings>();
foreach (FieldInfo field in type.GetFields(flags))
{
shouldSkip = false;
shouldSkip = CheckIfShouldSkip(overrideSettings, field?.FieldType?.FullName, shouldSkip);
if (shouldSkip || ShouldSkipDotNet(type, field.FieldType, field.Name))
{
continue;
}
object value = field.GetValue(instance);
ICopyOverrideSettings currentOverride = currentSettings.SingleOrDefault(s => s.FieldValueOverrideType.IsAssignableFrom(field.FieldType) &&
s.ContainingClassType.IsAssignableFrom(type) &&
s.AffectedFieldName == field.Name);
try
{
if (currentOverride != null)
{
if (!currentOverride.ShouldSkipOverrideInsteadOfSet)
{
var settableValue = currentOverride.UseFieldValueOverrideFunction
? currentOverride.FieldValueOverrideFunction(instance)
: currentOverride.FieldValueOverride;
field.SetValue(copy, settableValue);
if (currentOverride.OnlyOverrideFirst)
{
overrideSettings.Remove(overrideSettings.Single(s => s.AffectedFieldName == s.AffectedFieldName &&
s.ContainingClassType == s.ContainingClassType && s.FieldValueOverride == s.FieldValueOverride &&
s.FieldValueOverrideType == s.FieldValueOverrideType && s.OnlyOverrideFirst == s.OnlyOverrideFirst));
}
}
}
else if (ShouldUseVisitedGraph(overrideSettings) && visited.ContainsKey(value))
{
var settableValue = visited[value];
field.SetValue(copy, settableValue);
}
else
{
var settableValue = value.Clone(visited, field.FieldType, overrideSettings);
field.SetValue(copy, settableValue);
}
}
catch (Exception ex)
{
if (ShouldThrow(overrideSettings, field?.FieldType?.FullName, true, ex))
{
throw;
}
}
}
foreach (PropertyInfo propertyInfo in type.GetProperties(flags))
{
if (!propertyInfo.CanRead || !propertyInfo.CanWrite)
{
continue;
}
shouldSkip = false;
shouldSkip = CheckIfShouldSkip(overrideSettings, propertyInfo?.PropertyType?.FullName, shouldSkip);
ParameterInfo[] propParameters = propertyInfo.GetIndexParameters();
if (!shouldSkip && propParameters?.Where(pp => !pp.IsOptional).Count() > 0)
{
shouldSkip = true;
}
if (shouldSkip || ShouldSkipDotNet(type, propertyInfo.PropertyType, propertyInfo.Name))
{
continue;
}
object value = propertyInfo.GetValue(instance);
ICopyOverrideSettings currentOverride = currentSettings.SingleOrDefault(s => s.FieldValueOverrideType.IsAssignableFrom(propertyInfo.PropertyType) &&
s.ContainingClassType.IsAssignableFrom(type) &&
s.AffectedFieldName == propertyInfo.Name);
try
{
if (currentOverride != null)
{
if (!currentOverride.ShouldSkipOverrideInsteadOfSet)
{
var settableValue = currentOverride.UseFieldValueOverrideFunction
? currentOverride.FieldValueOverrideFunction(instance)
: currentOverride.FieldValueOverride;
propertyInfo.SetValue(copy, settableValue);
if (currentOverride.OnlyOverrideFirst)
{
overrideSettings.Remove(overrideSettings.Single(s => s.AffectedFieldName == s.AffectedFieldName &&
s.ContainingClassType == s.ContainingClassType && s.FieldValueOverride == s.FieldValueOverride &&
s.FieldValueOverrideType == s.FieldValueOverrideType && s.OnlyOverrideFirst == s.OnlyOverrideFirst));
}
}
}
else if (ShouldUseVisitedGraph(overrideSettings) && visited.ContainsKey(value))
{
var settableValue = visited[value];
propertyInfo.SetValue(copy, settableValue);
}
else
{
var settableValue = value.Clone(visited, propertyInfo.PropertyType, overrideSettings);
propertyInfo.SetValue(copy, settableValue);
}
}
catch (Exception ex)
{
if (ShouldThrow(overrideSettings, propertyInfo?.PropertyType?.FullName, true, ex))
{
throw;
}
}
}
type = type.BaseType;
}
// call the post copy actions
if (overrideSettings?.Any(s => s?.PostCopyActions != null) ?? false)
{
foreach (ICopyOverrideSettings setting in overrideSettings)
{
if (!(setting?.PostCopyActions?.Any() ?? false))
{
continue;
}
// try the exact post copy action
if (setting.PostCopyActions.ContainsKey(copy.GetType()))
{
setting.PostCopyActions[copy.GetType()](instance, copy, expectedType);
}
// try the default post copy action
else if (setting.PostCopyActions.ContainsKey(setting.DefaultPostActionType))
{
setting.PostCopyActions[setting.DefaultPostActionType](instance, copy, expectedType);
}
}
}
return(copy);
}
private static object Clone(this object instance, VisitedGraph visited, object copy)
{
if (visited.ContainsKey(instance))
return visited[instance];
else
visited.Add(instance, copy);
Type type = instance.GetType();
while (type != null)
{
foreach (FieldInfo field in type.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
object value = field.GetValue(instance);
if (visited.ContainsKey(value))
field.SetValue(copy, visited[value]);
else
field.SetValue(copy, value.Clone(visited));
}
type = type.BaseType;
}
return copy;
}