public RelationNode(FieldInfo relationFieldInfo, NDORelationAttribute attr, ClassNode parent)
{
this.parent = parent;
this.fieldType = relationFieldInfo.FieldType;
Type parentType = relationFieldInfo.ReflectedType;
NDOAssemblyName an = new NDOAssemblyName(parentType.Assembly.FullName);
string assShortName = an.Name;
this.isElement = !(relationFieldInfo.FieldType == typeof(IList) ||
relationFieldInfo.FieldType.GetInterface("IList") != null ||
GenericIListReflector.IsGenericIList(relationFieldInfo.FieldType));
// dataType & declaringType always have
// - a class/valutype prefix
// - an [AssName] prefix
this.dataType = new ReflectedType(relationFieldInfo.FieldType).ILName;
if (relationFieldInfo.DeclaringType != relationFieldInfo.ReflectedType)
{
this.declaringType = new ReflectedType(relationFieldInfo.DeclaringType).ILName;
}
else
{
this.declaringType = null;
}
this.name = relationFieldInfo.Name;
Type attrType = attr.GetType();
this.relationName = attr.RelationName;
this.relationInfo = attr.Info;
Type relType;
if (isElement)
{
relType = relationFieldInfo.FieldType;
}
else
{
if (attr.RelationType == null && relationFieldInfo.FieldType.IsGenericType)
{
relType = relationFieldInfo.FieldType.GetGenericArguments()[0];
}
else
{
relType = attr.RelationType;
}
if (relType == null)
{
throw new Exception("Can't determine referenced type in relation " + parent.Name + "." + this.name + ". Provide a type parameter for the [NDORelation] attribute.");
}
}
if (relType.IsGenericType && !relType.IsGenericTypeDefinition)
{
relType = relType.GetGenericTypeDefinition();
}
// Related Type hat kein "class " Prefix, hat [assName] nur bei fremden Assemblies.
this.relatedType = new ReflectedType(relType, assShortName).ILNameWithoutPrefix;
if (relType.IsGenericType)
{
this.relatedType = this.relatedType.Substring(0, this.relatedType.IndexOf('<'));
}
object[] attrs = relationFieldInfo.GetCustomAttributes(typeof(ForeignKeyColumnAttribute), true);
if (attrs.Length > 0)
{
this.foreignKeyColumnAttributes = new ForeignKeyColumnAttribute[attrs.Length];
attrs.CopyTo(this.foreignKeyColumnAttributes, 0);
}
attrs = relationFieldInfo.GetCustomAttributes(typeof(ChildForeignKeyColumnAttribute), true);
if (attrs.Length > 0)
{
this.childForeignKeyColumnAttributes = new ChildForeignKeyColumnAttribute[attrs.Length];
attrs.CopyTo(this.childForeignKeyColumnAttributes, 0);
}
attrs = relationFieldInfo.GetCustomAttributes(typeof(MappingTableAttribute), true);
if (attrs.Length > 0)
{
MappingTableAttribute = (MappingTableAttribute)attrs[0];
}
}
private void AnalyzeFields()
{
IList relations = new ArrayList();
var fis = this.classType.GetFields(BindingFlags.NonPublic | BindingFlags.Instance).Where(fi => !fi.IsInitOnly);
foreach (FieldInfo fi in fis)
{
string fname = fi.Name;
if (fname.StartsWith("_ndo"))
{
continue;
}
if (fi.FieldType.IsSubclassOf(typeof(System.Delegate)))
{
continue;
}
object[] attributes = fi.GetCustomAttributes(false);
bool cont = false;
foreach (System.Attribute attr in attributes)
{
if (attr is NDOTransientAttribute)
{
cont = true;
break;
}
if (attr is NDORelationAttribute)
{
this.relations.Add(new RelationNode(fi, (NDORelationAttribute)attr, this));
cont = true;
break;
}
}
if (cont)
{
continue;
}
// Field type is persistent - assume relation with element multiplicity.
if (typeof(IPersistenceCapable).IsAssignableFrom(fi.FieldType))
{
NDORelationAttribute nra = new NDORelationAttribute(fi.FieldType, RelationInfo.Default);
this.relations.Add(new RelationNode(fi, nra, this));
continue;
}
// Field is a collection - assume that it is either a relation or a transient field.
if (GenericIListReflector.IsGenericIList(fi.FieldType))
{
if (typeof(IPersistenceCapable).IsAssignableFrom(fi.FieldType.GetGenericArguments()[0]))
{
NDORelationAttribute nra = new NDORelationAttribute(fi.FieldType.GetGenericArguments()[0], RelationInfo.Default);
this.relations.Add(new RelationNode(fi, nra, this));
}
else
{
Console.WriteLine("Warning: The field " + this.name + "." + fi.Name + " is a generic collection to a nonpersistent type. NDO assumes, that this field is transient.");
}
continue;
}
if (!fi.FieldType.IsGenericParameter && fi.FieldType.IsClass && fi.FieldType != typeof(string) && fi.FieldType != typeof(byte[]))
{
this.embeddedTypes.Add(new EmbeddedTypeNode(fi));
}
else
{
FieldNode fn = new FieldNode(fi);
this.fields.Add(fn);
Type ft = fi.FieldType;
if (ft.IsValueType && !ft.IsEnum && !StorableTypes.Contains(ft))
{
ValueTypes.Instance.Add(new ValueTypeNode(ft));
}
}
}
// If there is more than one relation to the same target type
// without relation name, assign a relation name automatically
foreach (var group in this.relations.GroupBy(r => r.RelatedType))
{
if (group.Count() < 2)
{
continue;
}
int countWithoutName = 0;
foreach (var rel in group)
{
if (string.IsNullOrEmpty(rel.RelationName))
{
if (countWithoutName > 0)
{
string relname = rel.Name;
if (relname[0] == '<')
{
int q = relname.IndexOf('>');
if (q == -1)
{
q = relname.Length;
}
relname = relname.Substring(1, q - 1);
}
rel.RelationName = relname;
}
countWithoutName++;
}
}
}
}
