/// <summary>
/// Creates a new CloneType based on a <see cref="System.Type"/>, gathering all the information that is necessary for cloning.
/// </summary>
/// <param name="type"></param>
public CloneType(Type type)
{
this.type = type.GetTypeInfo();
this.copyByAssignment =
this.type.IsDeepCopyByAssignment() ||
typeof(MemberInfo).GetTypeInfo().IsAssignableFrom(this.type); /* Handle MemberInfo like POD */
this.investigateOwnership = !this.copyByAssignment;
this.surrogate = CloneProvider.GetSurrogateFor(this.type);
if (this.type.IsArray)
{
if (this.type.GetArrayRank() > 1)
{
throw new NotSupportedException(
"Cloning multidimensional arrays is not supported in Cohee. " +
"Consider skipping the referring field via [CloneField] or [DontSerialize] " +
"attribute, or use a regular array instead.");
}
this.elementType = CloneProvider.GetCloneType(this.type.GetElementType());
}
CloneBehaviorAttribute defaultBehaviorAttrib = CloneProvider.GetCloneBehaviorAttribute(this.type);
if (defaultBehaviorAttrib != null && defaultBehaviorAttrib.Behavior != CloneBehavior.Default)
{
this.behavior = defaultBehaviorAttrib.Behavior;
}
else
{
this.behavior = CloneBehavior.ChildObject;
}
}
public CloneField(FieldInfo field, CloneType typeInfo, CloneFieldFlags flags, CloneBehaviorAttribute behavior, bool isAlwaysReference)
{
this.field = field;
this.typeInfo = typeInfo;
this.flags = flags;
this.behavior = behavior;
this.isAlwaysReference = isAlwaysReference;
}
private List <Expression> CreateSetupFuncContent(Expression setup, Expression source, Expression target)
{
List <Expression> mainBlock = new List <Expression>();
bool anyContent = false;
for (int i = 0; i < this.fieldData.Length; i++)
{
// Don't need to scan "plain old data" and reference fields
if (this.fieldData[i].FieldType.IsCopyByAssignment)
{
continue;
}
if (this.fieldData[i].IsAlwaysReference)
{
continue;
}
if (this.fieldData[i].FieldType.Type.IsValueType && !this.fieldData[i].FieldType.InvestigateOwnership)
{
continue;
}
anyContent = true;
// Call HandleObject on the fields value
CloneBehaviorAttribute behaviorAttribute = this.fieldData[i].Behavior;
FieldInfo field = this.fieldData[i].Field;
Expression handleObjectExpression;
if (this.fieldData[i].FieldType.Type.IsValueType)
{
if (behaviorAttribute == null)
{
handleObjectExpression = Expression.Call(setup,
SetupHandleValue.MakeGenericMethod(field.FieldType),
Expression.Field(source, field),
Expression.Field(target, field),
Expression.Constant(CloneBehavior.Default),
Expression.Constant(null, typeof(TypeInfo)));
}
else
{
handleObjectExpression = Expression.Call(setup,
SetupHandleValue.MakeGenericMethod(field.FieldType),
Expression.Field(source, field),
Expression.Field(target, field),
Expression.Constant(behaviorAttribute.Behavior),
Expression.Constant(behaviorAttribute.TargetType));
}
}
else
{
if (behaviorAttribute == null)
{
handleObjectExpression = Expression.Call(setup,
SetupHandleObject.MakeGenericMethod(field.FieldType),
Expression.Field(source, field),
Expression.Field(target, field),
Expression.Constant(CloneBehavior.Default),
Expression.Constant(null, typeof(TypeInfo)));
}
else if (behaviorAttribute.TargetType == null || field.FieldType.GetTypeInfo().IsAssignableFrom(behaviorAttribute.TargetType.GetTypeInfo()))
{
handleObjectExpression = Expression.Call(setup,
SetupHandleObject.MakeGenericMethod(field.FieldType),
Expression.Field(source, field),
Expression.Field(target, field),
Expression.Constant(behaviorAttribute.Behavior),
Expression.Constant(null, typeof(TypeInfo)));
}
else
{
handleObjectExpression = Expression.Call(setup,
SetupHandleObject.MakeGenericMethod(field.FieldType),
Expression.Field(source, field),
Expression.Field(target, field),
Expression.Constant(behaviorAttribute.Behavior),
Expression.Constant(behaviorAttribute.TargetType));
}
}
mainBlock.Add(handleObjectExpression);
}
if (!anyContent)
{
return(null);
}
return(mainBlock);
}
public void Init()
{
if (this.surrogate != null)
{
return;
}
if (this.copyByAssignment)
{
return;
}
if (this.type.IsArray)
{
this.investigateOwnership = !(this.elementType.IsCopyByAssignment || (this.elementType.Type.IsValueType && !this.elementType.InvestigateOwnership));
return;
}
else
{
this.investigateOwnership = typeof(ICloneExplicit).GetTypeInfo().IsAssignableFrom(this.type) || this.surrogate != null;
}
// Retrieve field data
List <CloneField> fieldData = new List <CloneField>();
foreach (FieldInfo field in this.type.DeclaredFieldsDeep())
{
if (field.IsStatic)
{
continue;
}
if (field.IsInitOnly)
{
continue;
}
if (field.HasAttributeCached <ManuallyClonedAttribute>())
{
continue;
}
if (field.DeclaringType.GetTypeInfo().HasAttributeCached <ManuallyClonedAttribute>())
{
continue;
}
CloneFieldFlags flags = CloneFieldFlags.None;
CloneFieldAttribute fieldAttrib = field.GetAttributesCached <CloneFieldAttribute>().FirstOrDefault();
if (fieldAttrib != null)
{
flags = fieldAttrib.Flags;
}
if (field.HasAttributeCached <DontSerializeAttribute>() && !flags.HasFlag(CloneFieldFlags.DontSkip))
{
continue;
}
if (flags.HasFlag(CloneFieldFlags.Skip))
{
continue;
}
CloneBehaviorAttribute behaviorAttrib = field.GetAttributesCached <CloneBehaviorAttribute>().FirstOrDefault();
CloneType fieldType = CloneProvider.GetCloneType(field.FieldType);
bool isAlwaysReference =
(behaviorAttrib != null) &&
(behaviorAttrib.TargetType == null || field.FieldType.GetTypeInfo().IsAssignableFrom(behaviorAttrib.TargetType.GetTypeInfo())) &&
(behaviorAttrib.Behavior == CloneBehavior.Reference);
// Can this field own any objects itself?
if (!this.investigateOwnership)
{
bool fieldCanOwnObjects = true;
if (fieldType.IsCopyByAssignment)
{
fieldCanOwnObjects = false;
}
if (isAlwaysReference)
{
fieldCanOwnObjects = false;
}
if (fieldType.Type.IsValueType && !fieldType.InvestigateOwnership)
{
fieldCanOwnObjects = false;
}
if (fieldCanOwnObjects)
{
this.investigateOwnership = true;
}
}
CloneField fieldEntry = new CloneField(field, fieldType, flags, behaviorAttrib, isAlwaysReference);
fieldData.Add(fieldEntry);
}
this.fieldData = fieldData.ToArray();
// Build precompile functions for setup and (partially) assignment
this.CompileAssignmentFunc();
this.CompileSetupFunc();
this.CompileValueAssignmentFunc();
this.CompileValueSetupFunc();
}