/// <summary>
/// Transforms the de-serialized value to a value that is ready to be assigned to target
/// object. If the target object is a collection then the de-serialized value is
/// transformed to a collection that has the same type as the target object. If the target
/// object is an enumerable then the de-serialized value is transformed to an enumerable
/// that has the same type as the target object. If the target object is an Array then the
/// de-serialized value is transofrmed to an Array that has the same type as the target.
/// The target collection/enumerable is found using the virtual GetTargetCollection and
/// GetTargetEnumerable methods. By default these method create new instances of the
/// the collection/enumerable. This behavior can be overridden. For example, the
/// MemberFixup class overrides these methods to return the actual value of the member so
/// that the items of the collection can be assigned dorectly to the member itself.
/// </summary>
protected object TransformValue(object target, object value)
{
if (value == null)
{
return(null);
}
object transformedValue = value;
if (m_TargetType is LogicalCollection)
{
transformedValue = GetTargetCollection(target);
if (null == transformedValue)
{
return(null);
}
TransformHelper.CopyArrayLikeToTargetArrayLike(transformedValue, value, ((LogicalCollection)m_TargetType).AddMethod);
}
else if (m_TargetType is LogicalEnumerable)
{
transformedValue = GetTargetEnumerable(target);
if (null == transformedValue)
{
return(null);
}
TransformHelper.CopyArrayLikeToTargetArrayLike(transformedValue, value, ((LogicalEnumerable)m_TargetType).AddMethod);
}
else if (SerializationHelper.isLogicalArray(m_TargetType))
{
if (!m_TargetType.Type.IsAssignableFrom(value.GetType()))
{
Array srcArray = value as Array;
if (srcArray == null)
{
srcArray = TransformHelper.CreateArrayFromCollection(value);
if (srcArray == null)
{
return(null);
}
}
try
{
transformedValue = Array.CreateInstance(m_TargetType.Type.GetElementType(), srcArray.Length);
Array.Copy(srcArray, (Array)transformedValue, srcArray.Length);
}
catch (InvalidCastException)
{
throw new InvalidCastException(SR.Format(SR.XmlS_XmlInvalidCast_2, srcArray.GetType().FullName, m_TargetType.Type.FullName));
}
}
}
return(transformedValue);
}
/// <summary>
/// Returns true if the LogicalType represents a complex type
/// (struct or reference type).
/// </summary>
/// <remarks>
/// Specifically a type that is not Nullable<T>, not a logical array,
/// not a primitive, not an enum, and not a QName.
/// </remarks>
private bool isComplexObjectValue(LogicalType type)
{
if (!type.IsNullableType &&
!SerializationHelper.isLogicalArray(type) &&
!SerializationHelper.IsSerializationPrimitive(type.Type) &&
!type.Type.GetTypeInfo().IsEnum&&
type.CustomSerializer != CustomSerializerType.QName &&
!SerializationHelper.isBuiltInBinary(type))
{
return(true);
}
return(false);
}