private static LambdaExpression GetPropertyLambdaExpression(ParameterExpression param, FilterRule rule)
{
string[] propertyNames = rule.Field.Split('.');
Expression propertyAccess = param;
Type type = param.Type;
foreach (string propertyName in propertyNames)
{
PropertyInfo property = type.GetProperty(propertyName);
if (property == null)
{
throw new OBearException(string.Format(Resources.Filter_RuleFieldInTypeNotFound, rule.Field, type.FullName));
}
type = property.PropertyType;
propertyAccess = Expression.MakeMemberAccess(propertyAccess, property);
}
return(Expression.Lambda(propertyAccess, param));
}
