public static ModificationResult Update <T>(this Session session, Expression <Func <T> > evaluator, CriteriaOperator criteria) where T : IXPObject
{
if (ReferenceEquals(criteria, null))
{
criteria = CriteriaOperator.Parse("True");
}
XPClassInfo classInfo = session.GetClassInfo(typeof(T));
var batchWideData = new BatchWideDataHolder4Modification(session);
var recordsAffected = (int)session.Evaluate <T>(CriteriaOperator.Parse("Count()"), criteria);
PropertyValueStore propertyValueStore = null;
int memberInitCount = 1;
evaluator.Visit <MemberInitExpression>(expression => {
if (memberInitCount > 1)
{
throw new NotImplementedException("Only a single MemberInitExpression is allowed for the evaluator parameter.");
}
memberInitCount++;
propertyValueStore = CreatePropertyValueStore(classInfo, expression);
return(expression);
});
var properties = new MemberInfoCollection(classInfo, propertyValueStore.Select(x => x.Key).ToArray());
List <ModificationStatement> collection = UpdateQueryGenerator.GenerateUpdate(classInfo, properties, ObjectGeneratorCriteriaSet.GetCommonCriteriaSet(criteria), batchWideData);
foreach (UpdateStatement updateStatement in collection.OfType <UpdateStatement>())
{
for (int i = 0; i < updateStatement.Parameters.Count; i++)
{
Object value = propertyValueStore[i].Value;
if (value is IXPObject)
{
updateStatement.Parameters[i].Value = ((IXPObject)(value)).ClassInfo.GetId(value);
}
else
{
updateStatement.Parameters[i].Value = value;
}
}
updateStatement.RecordsAffected = recordsAffected;
}
return(session.DataLayer.ModifyData(collection.ToArray <ModificationStatement>()));
}
public static ModificationResult Delete <T>(this Session session, CriteriaOperator criteria) where T : IXPObject
{
if (ReferenceEquals(criteria, null))
{
criteria = CriteriaOperator.Parse("True");
}
XPClassInfo classInfo = session.GetClassInfo(typeof(T));
var batchWideData = new BatchWideDataHolder4Modification(session);
var recordsAffected = (int)session.Evaluate <T>(CriteriaOperator.Parse("Count()"), criteria);
List <ModificationStatement> collection = DeleteQueryGenerator.GenerateDelete(classInfo, ObjectGeneratorCriteriaSet.GetCommonCriteriaSet(criteria), batchWideData);
foreach (ModificationStatement item in collection)
{
item.RecordsAffected = recordsAffected;
}
ModificationStatement[] collectionToArray = collection.ToArray <ModificationStatement>();
ModificationResult result = session.DataLayer.ModifyData(collectionToArray);
return(result);
}
