public void InitializeProxy(object entity, string targetPropertyName, Type targetType)
{
using (var command = this.Connection.CreateCommand())
{
// get the identifier of the parent "entity" and use the
// primary key field value as the key into the child object(s);
var parent = this.MetadataStore.GetTableInfo(entity.GetType());
Type childPropertyType = entity.GetType().GetProperty(targetPropertyName).PropertyType;
Type childType = null;
TableInfo child = null;
if (targetType.IsGenericType &&
typeof(IEnumerable).IsAssignableFrom(targetType))
{
// at this point we are proxying a collection:
// make sure to hydrate all instances and set
// the proxied instance back on the parent entity:
childType = targetType.GetGenericArguments()[0];
this.MetadataStore.AddEntity(childType);
child = this.MetadataStore.GetTableInfo(childType);
}
else
{
// at this point we are proxying a reference type
// as a child entity on the parent:
childType = targetType;
this.MetadataStore.AddEntity(childType);
child = this.MetadataStore.GetTableInfo(targetType);
}
var query = child.GetSelectStatmentForAllFields();
object id = parent.PrimaryKey.Column.GetValue(entity, null);
query = child.AddWhereClauseForParentById(parent.PrimaryKey, query, id);
command.CommandText = query;
command.CreateAndAddInputParameterForPrimaryKey(parent, parent.PrimaryKey, entity);
this.DisplayCommand(command);
Hydrator.UpdateEntity(childPropertyType, childType, entity, command);
}
}