private IList <ColumnDefinition> PickLikelyColumns(JsonDocument[] sampleDocuments, string context, IList <PriorityColumn> priorityColumns)
{
if (priorityColumns == null || priorityColumns.Count == 0)
{
priorityColumns = DefaultPriorityColumns;
}
// only consider nested properties if any of the priority columns refers to a nested property
var includeNestedProperties = priorityColumns.Any(c => c.PropertyNamePattern.Contains("\\."));
var columns = DocumentHelpers.GetPropertiesFromDocuments(sampleDocuments, includeNestedProperties)
.GroupBy(p => p)
.Select(g => new { Property = g.Key, Occurence = g.Count() / (double)sampleDocuments.Length })
.Select(p => new { p.Property, Importance = p.Occurence + ImportanceBoost(p.Property, context, priorityColumns) })
.OrderByDescending(p => p.Importance)
.ThenBy(p => p.Property)
.Select(p => new ColumnDefinition
{
Binding = p.Property,
Header = p.Property,
DefaultWidth = GetDefaultColumnWidth(p.Property, priorityColumns)
})
.Take(6)
.ToList();
return(columns);
}
private IList <string> CreateSuggestedBindingsFromDocuments(JsonDocument[] jsonDocuments)
{
var bindings = DocumentHelpers.GetPropertiesFromDocuments(jsonDocuments, true).Distinct()
.Concat(DocumentHelpers.GetMetadataFromDocuments(jsonDocuments, true).Distinct().Select(b => "$Meta:" + b))
.Concat(new[] { "$JsonDocument:Etag", "$JsonDocument:LastModified", "$Temp:Score" })
.ToArray();
return(bindings);
}