private MethodCallExpression CreateSelectExpression(Expression source)
{
if (_rootNavigationItem.HasNavigationItems())
{
return((MethodCallExpression)source);
}
if (_rootNavigationItem.AllSelected)
{
return((MethodCallExpression)source);
}
ParameterExpression parameter = _joinBuilder.Visitor.Parameter;
IReadOnlyList <OeStructuralSelectItem> structuralItems = _rootNavigationItem.GetStructuralItemsWithNotSelected();
var expressions = new Expression[structuralItems.Count];
for (int i = 0; i < expressions.Length; i++)
{
if (structuralItems[i].EdmProperty is ComputeProperty computeProperty)
{
expressions[i] = computeProperty.Expression;
}
else
{
PropertyInfo clrProperty = parameter.Type.GetPropertyIgnoreCase(structuralItems[i].EdmProperty);
expressions[i] = Expression.MakeMemberAccess(parameter, clrProperty);
}
}
NewExpression newTupleExpression = OeExpressionHelper.CreateTupleExpression(expressions);
LambdaExpression lambda = Expression.Lambda(newTupleExpression, parameter);
MethodInfo selectMethodInfo = OeMethodInfoHelper.GetSelectMethodInfo(parameter.Type, newTupleExpression.Type);
return(Expression.Call(selectMethodInfo, source, lambda));
}
private static OePropertyAccessor[] GetAccessors(Type clrEntityType, OeNavigationSelectItem navigationItem)
{
ParameterExpression parameter;
UnaryExpression typedAccessorParameter;
IReadOnlyList <MemberExpression> propertyExpressions;
if (navigationItem.AllSelected)
{
if (navigationItem.Parent != null && navigationItem.NavigationSelectItem is ExpandedCountSelectItem)
{
parameter = Expression.Parameter(typeof(Object));
typedAccessorParameter = Expression.Convert(parameter, clrEntityType);
propertyExpressions = OeExpressionHelper.GetPropertyExpressions(typedAccessorParameter);
return(new[] { OePropertyAccessor.CreatePropertyAccessor(OeEdmClrHelper.CountProperty, propertyExpressions[0], parameter, false) });
}
else
{
return(OePropertyAccessor.CreateFromType(clrEntityType, navigationItem.EntitySet));
}
}
parameter = Expression.Parameter(typeof(Object));
typedAccessorParameter = Expression.Convert(parameter, clrEntityType);
propertyExpressions = OeExpressionHelper.GetPropertyExpressions(typedAccessorParameter);
IReadOnlyList <OeStructuralSelectItem> structuralItems = navigationItem.GetStructuralItemsWithNotSelected();
var accessors = new OePropertyAccessor[structuralItems.Count];
for (int i = 0; i < structuralItems.Count; i++)
{
accessors[i] = OePropertyAccessor.CreatePropertyAccessor(structuralItems[i].EdmProperty, propertyExpressions[i], parameter, structuralItems[i].NotSelected);
}
return(accessors);
}
private static OePropertyAccessor[] GetAccessors(Type clrEntityType, OeNavigationSelectItem navigationItem)
{
if (navigationItem.StructuralItems.Count == 0)
{
return(OePropertyAccessor.CreateFromType(clrEntityType, navigationItem.EntitySet));
}
IReadOnlyList <OeStructuralSelectItem> structuralItems = navigationItem.GetStructuralItemsWithNotSelected();
var accessors = new OePropertyAccessor[structuralItems.Count];
ParameterExpression parameter = Expression.Parameter(typeof(Object));
UnaryExpression typedAccessorParameter = Expression.Convert(parameter, clrEntityType);
IReadOnlyList <MemberExpression> propertyExpressions = OeExpressionHelper.GetPropertyExpressions(typedAccessorParameter);
for (int i = 0; i < structuralItems.Count; i++)
{
accessors[i] = OePropertyAccessor.CreatePropertyAccessor(structuralItems[i].EdmProperty, propertyExpressions[i], parameter, structuralItems[i].NotSelected);
}
return(accessors);
}