/// <summary>
/// Populates a list with items.
/// </summary>
/// <param name="state">The loader state.</param>
/// <param name="list">The list to populate.</param>
/// <param name="listElemType">The type of elements in the list.</param>
/// <param name="element">The element that defines the list.</param>
private void PopulateListItems(ObjectLoaderState state, Object list, Type listElemType, XElement element)
{
// Make sure that the list is properly defined.
var itemsRoot = element.Element("Items");
if (itemsRoot != null && itemsRoot.Elements().Where(x => x.Name != "Item").Any())
{
throw new InvalidOperationException(NucleusStrings.NonItemElementsInListDef);
}
// Populate the list's items.
if (itemsRoot != null)
{
var add = list.GetType().GetMethod("Add", new[] { listElemType });
var items = itemsRoot.Elements("Item").ToList();
for (int i = 0; i < items.Count; i++)
{
var value = default(Object);
var type = GetTypeFromElement(state, listElemType, items[i]);
if (items[i].Elements().Any())
{
value = CreateObject(state, type, null, GetSpecifiedConstructorArguments(items[i]));
value = PopulateObjectFromElements(state, value, items[i]);
}
else
{
value = ObjectResolver.FromString(items[i].Value, type);
}
add.Invoke(list, new[] { value });
}
}
}
/// <summary>
/// Populates an array value.
/// </summary>
/// <param name="state">The loader state.</param>
/// <param name="member">The member to populate.</param>
/// <param name="element">The element that defines the member's value.</param>
private void PopulateArray(ObjectLoaderState state, ObjectLoaderMember member, XElement element)
{
// Make sure that the array is properly defined.
var itemsRoot = element.Element("Items");
if (itemsRoot != null && itemsRoot.Elements().Where(x => x.Name != "Item").Any())
{
throw new InvalidOperationException(NucleusStrings.NonItemElementsInArrayDef);
}
// Create the array.
var items = (itemsRoot == null) ? new List <XElement>() : itemsRoot.Elements("Item").ToList();
var arrayElementType = member.MemberType.GetElementType();
var array = Array.CreateInstance(arrayElementType, items.Count);
member.SetValueFromData(array, element);
// Populate the array's items.
for (int i = 0; i < items.Count; i++)
{
var value = default(Object);
var type = GetTypeFromElement(state, arrayElementType, items[i]);
if (items[i].Elements().Any())
{
value = CreateObject(state, type, null, GetSpecifiedConstructorArguments(items[i]));
value = PopulateObjectFromElements(state, value, items[i]);
}
else
{
value = ObjectResolver.FromString(items[i].Value, type);
}
array.SetValue(value, i);
}
}
/// <inheritdoc/>
public override Object ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer)
{
if (reader.TokenType != JsonToken.String)
{
throw new JsonReaderException(NucleusStrings.JsonObjectResolverRequiresString.Format(reader.TokenType));
}
return(ObjectResolver.FromString((String)reader.Value, objectType));
}
/// <summary>
/// Converts the given object to the type of this converter, using the specified context and culture information.
/// </summary>
/// <param name="context">An <see cref="ITypeDescriptorContext"/> that provides a format context.</param>
/// <param name="culture">The <see cref="CultureInfo"/> to use as the current culture.</param>
/// <param name="value">The <see cref="Object"/> to convert.</param>
/// <returns>An <see cref="Object"/> that represents the converted value.</returns>
public override Object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
{
if (value is String)
{
if (String.IsNullOrEmpty((String)value))
{
return(default(T));
}
var type = (context == null) ? typeof(T) : context.PropertyDescriptor.PropertyType;
return(ObjectResolver.FromString((String)value, type));
}
return(base.ConvertFrom(context, culture, value));
}
/// <summary>
/// Populates an object from the attributes defined on the specified data element.
/// </summary>
/// <param name="state">The loader state.</param>
/// <param name="objectInstance">The object instance.</param>
/// <param name="objectElement">The object element.</param>
/// <returns>The object instance.</returns>
private Object PopulateObjectFromAttributes(ObjectLoaderState state, Object objectInstance, XElement objectElement)
{
foreach (var attr in objectElement.Attributes())
{
if (IsReservedKeyword(attr.Name.LocalName))
{
continue;
}
var attrMember = ObjectLoaderMember.Find(objectInstance, attr.Name.LocalName, state.IgnoreMissingMembers);
if (attrMember != null)
{
if (state.Resolver != null && state.Resolver(objectInstance, attr.Name.LocalName, attr.Value))
{
continue;
}
var attrValue = ObjectResolver.FromString(attr.Value, attrMember.MemberType);
attrMember.SetValue(attrValue, null);
}
}
return(objectInstance);
}
/// <summary>
/// Gets a set of index parameters from the specified data element.
/// </summary>
/// <param name="element">The data element from which to retrieve index parameters.</param>
/// <returns>The index parameters that were retrieved.</returns>
private Object[] GetIndexParameters(XElement element)
{
var indexParameterValues = new Object[indexParameters.Length];
for (int i = 0; i < indexParameters.Length; i++)
{
var indexParameter = indexParameters[i];
var attr = element.Attribute(indexParameter.Name);
if (attr == null)
{
throw new InvalidOperationException(NucleusStrings.DataObjectMissingIndexParam.Format(indexParameter.Name));
}
indexParameterValues[i] = ObjectResolver.FromString(attr.Value, indexParameter.ParameterType);
}
if (element.Attributes().Where(x => !ObjectLoaderXmlSerializer.IsReservedKeyword(x.Name.LocalName)).Count() > indexParameterValues.Length)
{
throw new InvalidOperationException(NucleusStrings.DataObjectHasTooManyIndexParams);
}
return(indexParameterValues);
}
/// <summary>
/// Attempts to parse a string into a simple value.
/// </summary>
/// <param name="str">The string to parse.</param>
/// <param name="type">The type into which to parse the string.</param>
/// <param name="provider">An object that provides culture-specific formatting information.</param>
/// <returns>The value that was parsed.</returns>
private Object ParseValue(String str, Type type, IFormatProvider provider)
{
return(ObjectResolver.FromString(str, type, provider));
}