public static MemberExpression GetPropertyExpression(OeJoinBuilder joinBuilder, Expression source, Expression parameterExpression, SingleValueNode sortProperty)
{
if (sortProperty is SingleValuePropertyAccessNode propertyNode)
{
return(joinBuilder.GetJoinPropertyExpression(source, parameterExpression, propertyNode));
}
if (sortProperty is SingleValueOpenPropertyAccessNode openPropertyNode)
{
var propertyExpression = (MemberExpression)joinBuilder.Visitor.TranslateNode(openPropertyNode);
var replaceParameterVisitor = new ReplaceParameterVisitor(joinBuilder.Visitor.Parameter, parameterExpression);
return((MemberExpression)replaceParameterVisitor.Visit(propertyExpression));
}
throw new InvalidOperationException("Unknown type order by expression " + sortProperty.GetType().Name);
}
public static Expression Build(OeJoinBuilder joinBuilder, Expression source, ParameterExpression parameterExpression, OrderByClause orderByClause)
{
while (orderByClause != null)
{
var propertyNode = (SingleValuePropertyAccessNode)orderByClause.Expression;
Expression keySelector = joinBuilder.GetJoinPropertyExpression(source, parameterExpression, propertyNode);
LambdaExpression lambda = Expression.Lambda(keySelector, parameterExpression);
MethodInfo orderByMethodInfo = GetOrderByMethodInfo(source, orderByClause.Direction, parameterExpression.Type, keySelector.Type);
source = Expression.Call(orderByMethodInfo, source, lambda);
orderByClause = orderByClause.ThenBy;
}
return(source);
}
public static OePropertyAccessor[] GetAccessors(Expression source, OrderByClause orderByClause, Translators.OeJoinBuilder joinBuilder)
{
var accessors = new List <OePropertyAccessor>();
ParameterExpression parameter = Expression.Parameter(typeof(Object));
UnaryExpression instance = Expression.Convert(parameter, OeExpressionHelper.GetCollectionItemType(source.Type));
while (orderByClause != null)
{
var propertyNode = (SingleValuePropertyAccessNode)orderByClause.Expression;
MemberExpression propertyExpression = joinBuilder.GetJoinPropertyExpression(source, instance, propertyNode);
accessors.Add(OePropertyAccessor.CreatePropertyAccessor(propertyNode.Property, propertyExpression, parameter, true));
orderByClause = orderByClause.ThenBy;
}
return(accessors.ToArray());
}
public static Expression BuildNested(OeJoinBuilder joinBuilder, Expression source, ParameterExpression parameterExpression, OrderByClause orderByClause,
IReadOnlyList <IEdmNavigationProperty> joinPath)
{
while (orderByClause != null)
{
var propertyNode = (SingleValuePropertyAccessNode)orderByClause.Expression;
Expression?keySelector = joinBuilder.GetJoinPropertyExpression(source, joinBuilder.Visitor.Parameter, joinPath, propertyNode.Property);
if (keySelector == null)
{
throw new InvalidOperationException("Sorting EdmProperty " + propertyNode.Property.Name + " not found in source");
}
LambdaExpression lambda = Expression.Lambda(keySelector, parameterExpression);
MethodInfo orderByMethodInfo = GetOrderByMethodInfo(source, orderByClause.Direction, parameterExpression.Type, keySelector.Type);
source = Expression.Call(orderByMethodInfo, source, lambda);
orderByClause = orderByClause.ThenBy;
}
return(source);
}
