protected override Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
MemberNameVisitor visitor = new MemberNameVisitor(_rootCriteria, false);
visitor.Visit(expr.Expression);
visitor.CurrentCriteria.CreateCriteria(expr.Name, _alias, JoinType.LeftOuterJoin);
return expr;
}
protected virtual Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
EntityExpression e = (EntityExpression)Visit(expr.Expression);
if (e != expr.Expression)
{
return new CollectionAccessExpression(expr.Name, expr.Type, expr.NHibernateType, e, expr.ElementExpression);
}
return expr;
}
private Expression CastIfNecessary(CollectionAccessExpression expr)
{
if (expr.Type.IsGenericType)
return expr;
MethodInfo method = typeof(Enumerable).GetMethod("Cast")
.MakeGenericMethod(expr.ElementExpression.Type);
return Expression.Call(method, expr);
}
protected override Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
EntityExpression elementExpression = expr.ElementExpression;
if (elementExpression == null)
return expr;
string alias = FindCollectionAlias(elementExpression.Type);
if (String.IsNullOrEmpty(alias))
return expr;
elementExpression = new EntityExpression(elementExpression.AssociationPath, alias, elementExpression.Type, elementExpression.MetaData, elementExpression.Expression);
return new CollectionAccessExpression(expr.Name, expr.Type, expr.NHibernateType, expr.Expression, elementExpression);
}
protected override Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
return VisitPropertyAccess(expr);
}
protected override Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
expr = (CollectionAccessExpression)base.VisitCollectionAccess(expr);
//memberNameBuilder.Append(expr.Name + ".");
ResetMemberName(expr.Name + ".");
currentExpression = expr;
if (createCriteriaForCollections)
{
if (expr.ElementExpression != null)
{
currentCriteria = EnsureCriteria(expr.Name, expr.ElementExpression.Alias);
}
}
isQueringEntity = false;
return expr;
}
private ICriterion GetCollectionContainsCriteria(CollectionAccessExpression arg, Expression containsExpression)
{
EntityExpression rootEntity = EntityExpressionVisitor.FirstEntity(arg);
var rootEntityType = rootEntity.Type;
if (rootEntity.MetaData.HasProxy)
{
rootEntityType = rootEntity.MetaData.GetMappedClass(EntityMode.Poco);
}
DetachedCriteria query = DetachedCriteria.For(rootEntityType)
.SetProjection(Projections.Id());
var visitor = new MemberNameVisitor(query.Adapt(session), true);
visitor.Visit(arg);
//TODO: this won't work for collections of values
var containedEntity = QueryUtil.GetExpressionValue(containsExpression);
var collectionIdPropertyName = visitor.MemberName + "." + arg.ElementExpression.MetaData.IdentifierPropertyName;
var idValue = arg.ElementExpression.MetaData.GetIdentifier(containedEntity, EntityMode.Poco);
query.Add(Restrictions.Eq(collectionIdPropertyName, idValue));
string identifierName = rootEntity.MetaData.IdentifierPropertyName;
return Subqueries.PropertyIn(identifierName, query);
}
protected override Expression VisitCollectionAccess(CollectionAccessExpression expr)
{
Type = BinaryCriterionType.Property;
return expr;
}
