/// <summary>
/// Set the value of the input field or property using the element. This function will examine the inputs to determine the
/// best match for the element. In some cases this may trigger a recursive examination of the element's children.
/// </summary>
/// <param name="fieldOrProperty">Field or property whose value will be set.</param>
/// <param name="element">Element to obtain the value from.</param>
/// <param name="o">Object instance whose field or property will be set.</param>
void _SetFieldOrProperty(IFieldOrProperty fieldOrProperty, XmlNode element, ref object o)
{
// first check for valueOf
object value = _CheckValueOf(element);
if (value != null)
{
fieldOrProperty.SetValue(o, value);
// done
return;
}
// check for aggregate
if (_CheckAggregate(fieldOrProperty, element, ref o))
// no need to set value; values of aggregates are set as post process action.
return;
string objName = _GetObjectName(o);
// if its a string we can just set it
if (fieldOrProperty.DeclaredType == typeof(System.String))
{
fieldOrProperty.SetValue(o, element.InnerText);
}
else if (TypeUtil.IsPrimitiveType(fieldOrProperty.DeclaredType))
{
if (element.InnerText == null || element.InnerText.Trim() == string.Empty)
{
_Error("Empty primitive value for type, won't set it: element: " + element.LocalName + ", type: " + fieldOrProperty.DeclaredType.FullName + ", object: " + objName);
}
else
{
// extract primitive value and set it
try
{
fieldOrProperty.SetValue(o, TypeUtil.GetPrimitiveValue(fieldOrProperty.DeclaredType, element.InnerText));
}
catch (Exception)
{
_Error("TorqueXmlDeserializer._SetFieldOrProperty - Unable to parse format string {0} for type {1} for element {2} in object {3}.", element.InnerText, fieldOrProperty.DeclaredType.FullName, element.LocalName, objName);
}
}
}
// if it is a reference type, we can deserialize in to it
else if (fieldOrProperty.DeclaredType.IsClass || fieldOrProperty.DeclaredType.IsInterface || fieldOrProperty.DeclaredType.IsAbstract)
{
bool isInstantiable = !(fieldOrProperty.DeclaredType.IsInterface || fieldOrProperty.DeclaredType.IsAbstract);
object subObj;
TypeInfo subType;
// check for name ref
if (_BindNameRef(element, fieldOrProperty, ref o) != null)
// done with this field
return;
// for reference types, allow deserializing into the existing object, if the attribute is present
// and there is a valid object.
subObj = fieldOrProperty.GetValue(o);
bool inPlace = false;
if (subObj != null)
{
// instance exists, check for attribute - use the property/field type for this, not
// declared type.
object[] attributes = fieldOrProperty.GetCustomAttributes(true);
foreach (object attr in attributes)
if (attr is TorqueXmlDeserializeInPlace)
{
inPlace = true;
break;
}
if (!inPlace)
{
// check for xml attribute
XmlNode inPlaceAttribute = element.Attributes.GetNamedItem("inPlace");
if (inPlaceAttribute != null && Boolean.Parse(inPlaceAttribute.Value))
inPlace = true;
}
}
if (subObj != null && inPlace)
{
// ok to deserialize in place; get the typeinfo object for later use.
subType = TypeUtil.FindTypeInfo(subObj.GetType().FullName);
}
else
{
// log if we are replacing, but there was an instance already
//if (subObj != null)
// _Info("Field has object instance but TorqueXmlDeserializeInPlace/inPlace attribute not specified: creating new object:" + element.LocalName);
// in case we are making a fixed size list, pass the number of children down to the object maker
int childCount = element.ChildNodes.Count;
// if type is not instantiable, we might be able to come up with an instantiable type by looking for type mappings
if (!isInstantiable)
_MakeNewObject(element, out subObj, out subType, childCount);
else
// instantiable type, so make object used declared type
_MakeNewObject(fieldOrProperty.DeclaredType.FullName, out subObj, out subType, childCount);
if (subObj == null)
{
_Error("Unable to create new instance for element {0} on object {1}", element.LocalName, objName);
return;
}
}
// if it is a list of objects, handle it specially
if (subType.IsList)
{
DeserializedList dlist = new DeserializedList(subObj);
_RecurseList(element, ref dlist, subType);
}
else
_Recurse(element, ref subObj, subType);
// set value
// it is important to do this after the element has been deserialized - some property accessors
// assume this (such as lists of link points and object types).
fieldOrProperty.SetValue(o, subObj);
}
// if it is a value type, then it must be a struct (because we handled primitives earlier)
else if (fieldOrProperty.DeclaredType.IsValueType)
{
// look for object type ref
if (_BindObjectTypeRef(element, fieldOrProperty, ref o) != null)
return;
object subObj;
TypeInfo subType;
_MakeNewObject(fieldOrProperty.DeclaredType.FullName, out subObj, out subType);
if (subType == null) // check type for null instead of object, since this is a value type
{
_Error("Unable to create new instance for element {0} on object {1}", element.LocalName, objName);
return;
}
_Recurse(element, ref subObj, subType);
// set value
fieldOrProperty.SetValue(o, subObj);
}
else
_Error("Don't know how to set field or property of type {0} for element {1} on object: {2}", fieldOrProperty.DeclaredType.FullName, element.LocalName, objName);
}
/// <summary>
/// Examine the children of the specifid list element and add its values to the input list.
/// </summary>
/// <param name="element">Element to examine</param>
/// <param name="list">List that will receive the values</param>
/// <param name="ti">TypeInfo of the list that is receiving the values.</param>
void _RecurseList(XmlNode element, ref DeserializedList list, TypeInfo ti)
{
// get the type of the list. if it is a specific type (i.e., not "object"), we can use that type
// to create instances for children that do not specify a type attribute.
Type listType = list.GetListType();
bool listTypeInstantiable = TypeUtil.IsInstantiable(listType);
foreach (XmlNode child in element.ChildNodes)
{
if (child.NodeType != XmlNodeType.Element)
continue;
TypeInfo subType = null;
object subObj = null;
// does the element have inPlace specified? If so, search for an existing instance of the same type
// in the list. if it exists, deserialize into that instance, instead of into a new object,
bool inPlace = false;
XmlNode inPlaceAttribute = child.Attributes.GetNamedItem("inPlace");
if (inPlaceAttribute != null && Boolean.Parse(inPlaceAttribute.Value))
{
// has attribute. lookup the type
string typeName = _GetObjectTypeName(child);
subType = TypeUtil.FindTypeInfo(typeName);
// try to find an instance of the type in the list (will be null if unsuccessful)
subObj = list.GetFirstInstanceOfType(subType);
inPlace = subObj != null;
}
if (!inPlace)
// create new object
_MakeNewObject(child, out subObj, out subType);
if (subObj == null && subType == null && listTypeInstantiable)
{
// couldn't find a mapping for this type, but the list itself has an instantiable type that we could use.
// if we are creating a String, just use the text value from the xml instead of creating a new object.
// we can't actual create a new object anyway because String has no zero argument constructor.
if (listType == typeof(String))
{
subObj = child.InnerText;
subType = TypeUtil.FindTypeInfo(typeof(String).FullName);
}
else
{
// create the new object using the list's type.
// sometimes a warning but sometimes what the user intends. we'll call it _Info
// ok, this is just excessive console spam. don't worry about this case.
//_Info("List subelement '{0}' has no default type mapping or type attribute specified. Using the type of the list container, '{1}', to create list element instance.", child.LocalName, listType.FullName);
_MakeNewObject(listType.FullName, out subObj, out subType);
}
}
// still no object? warn about it and continue
if (subObj == null)
{
_Warn("Ignoring List subelement '{0}': no default type mapping, no type attribute, and list type '{1}' is not instantiable", child.LocalName, listType.FullName);
continue;
}
// if the subType is a primitive or enum, do not recurse on it - instead just set the value directly
if (TypeUtil.IsPrimitiveType(subType.Type))
{
try
{
subObj = TypeUtil.GetPrimitiveValue(subType.Type, child.InnerText);
}
catch (Exception)
{
_Error("TorqueXmlDeserializer._SetFieldOrProperty - Unable to parse format string {0} for type {1}.", child.InnerText, subType.Type.FullName);
}
}
else
{
_Recurse(child, ref subObj, subType);
}
if (!inPlace)
list.Add(subObj);
}
}
