protected virtual Expression VisitEntity(EntityExpression expr)
{
Expression e = Visit(expr.Expression);
if (e != expr.Expression)
{
return new EntityExpression(expr.AssociationPath, expr.Alias, expr.Type, expr.MetaData, e);
}
return expr;
}
protected PropertyAccessExpression(string name, System.Type type, IType nhibernateType, EntityExpression expression, NHibernateExpressionType nodeType)
: base(nodeType, type)
{
if (String.IsNullOrEmpty(name)) throw new ArgumentNullException("name");
if (type == null) throw new ArgumentNullException("type");
if (nhibernateType == null) throw new ArgumentNullException("nhibernateType");
if (expression == null) throw new ArgumentNullException("expression");
_name = name;
_expression = expression;
_nhibernateType = nhibernateType;
}
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 VisitMemberAccess(MemberExpression expr)
{
expr = (MemberExpression)base.VisitMemberAccess(expr);
IClassMetadata metaData = GetMetaData(expr.Type);
if (metaData != null)
{
string associationPath = AssociationPathForEntity(expr);
return new EntityExpression(associationPath, expr.Member.Name, expr.Type, metaData,
expr.Expression, _addedAlias);
}
string memberName;
IType nhibernateType;
EntityExpression parentExpression = GetParentExpression(expr, out memberName, out nhibernateType);
if (parentExpression != null)
{
if (nhibernateType.IsCollectionType)
{
CollectionType collectionType = (CollectionType)nhibernateType;
IType nhElementType = collectionType.GetElementType((ISessionFactoryImplementor)_sessionFactory);
System.Type elementType = nhElementType.ReturnedClass;
IClassMetadata elementMetaData = GetMetaData(elementType);
EntityExpression elementExpression = null;
if (elementMetaData != null)
elementExpression = new EntityExpression(null, memberName, elementType,
elementMetaData, null, _addedAlias);
return new CollectionAccessExpression(memberName, expr.Type, nhibernateType, parentExpression, elementExpression);
}
return new PropertyAccessExpression(memberName, expr.Type, nhibernateType, parentExpression);
}
return expr;
}
protected PropertyAccessExpression(string name, System.Type type, IType nhibernateType, EntityExpression expression, NHibernateExpressionType nodeType)
: base(nodeType, type)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
if (type == null)
{
throw new ArgumentNullException("type");
}
if (nhibernateType == null)
{
throw new ArgumentNullException("nhibernateType");
}
if (expression == null)
{
throw new ArgumentNullException("expression");
}
_name = name;
_expression = expression;
_nhibernateType = nhibernateType;
}
private bool IsRootEntity(EntityExpression expr)
{
var nhExpression = expr.Expression as NHibernateExpression;
if (nhExpression != null)
return false;
if (expr.Type != rootCriteria.GetRootType())
return false;
return true;
}
protected override Expression VisitEntity(EntityExpression expr)
{
expr = (EntityExpression)base.VisitEntity(expr);
if (currentCriteria.GetCriteriaByAlias(expr.Alias) != null || !IsRootEntity(expr))
{
if (!String.IsNullOrEmpty(expr.AssociationPath))
currentCriteria = EnsureCriteria(expr.AssociationPath, expr.Alias);
ResetMemberName(expr.Alias + ".");
}
currentAssociationPath = expr.AssociationPath;
currentExpression = expr;
isQueringEntity = true;
return expr;
}
protected override Expression VisitEntity(EntityExpression expr)
{
Type = BinaryCriterionType.Property;
Name = MemberNameVisitor.GetMemberName(rootCriteria, expr);
return expr;
}
public PropertyAccessExpression(string name, System.Type type, IType nhibernateType, EntityExpression expression)
: this(name, type, nhibernateType, expression, NHibernateExpressionType.PropertyAccess)
{
}
public CollectionAccessExpression(string name, System.Type type, IType nhibernateType,
EntityExpression expression, EntityExpression elementExpression)
: base(name, type, nhibernateType, expression, NHibernateExpressionType.CollectionAccess)
{
_elementExpression = elementExpression;
}
protected override Expression VisitEntity(EntityExpression expr)
{
if (_rootCriteria.GetCriteriaByAlias(expr.Alias) != null)
{
_transformer = new LinqJoinResultsTransformer(expr.Type);
}
return expr;
}
public PropertyAccessExpression(string name, System.Type type, IType nhibernateType, EntityExpression expression)
: this(name, type, nhibernateType, expression, NHibernateExpressionType.PropertyAccess)
{
}
protected override Expression VisitEntity(EntityExpression expr)
{
Type = BinaryCriterionType.Property;
return expr;
}
protected override Expression VisitEntity(EntityExpression expr)
{
this.Expression = expr;
if (_findFirstEntity) return expr;
return base.VisitEntity(expr);
}
public CollectionAccessExpression(string name, System.Type type, IType nhibernateType,
EntityExpression expression, EntityExpression elementExpression)
: base(name, type, nhibernateType, expression, NHibernateExpressionType.CollectionAccess)
{
_elementExpression = elementExpression;
}
