/// <summary>
/// Appends a $bucketAuto stage to the pipeline.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TValue">The type of the value.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="groupBy">The expression providing the value to group by.</param>
/// <param name="buckets">The number of buckets.</param>
/// <param name="options">The options (optional).</param>
/// <returns>The fluent aggregate interface.</returns>
public static IAggregateFluent <AggregateBucketAutoResult <TValue> > BucketAuto <TResult, TValue>(
this IAggregateFluent <TResult> aggregate,
Expression <Func <TResult, TValue> > groupBy,
int buckets,
AggregateBucketAutoOptions options = null)
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
Ensure.IsNotNull(groupBy, nameof(groupBy));
var groupByDefinition = new ExpressionAggregateExpressionDefinition <TResult, TValue>(groupBy, aggregate.Options.TranslationOptions);
return(aggregate.BucketAuto(groupByDefinition, buckets, options));
}
/// <summary>
/// Appends a $bucketAuto stage to the pipeline.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TValue">The type of the value.</typeparam>
/// <typeparam name="TNewResult">The type of the new result.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="groupBy">The expression providing the value to group by.</param>
/// <param name="buckets">The number of buckets.</param>
/// <param name="output">The output projection.</param>
/// <param name="options">The options (optional).</param>
/// <returns>The fluent aggregate interface.</returns>
public static IAggregateFluent <TNewResult> BucketAuto <TResult, TValue, TNewResult>(
this IAggregateFluent <TResult> aggregate,
Expression <Func <TResult, TValue> > groupBy,
int buckets,
Expression <Func <IGrouping <TValue, TResult>, TNewResult> > output,
AggregateBucketAutoOptions options = null)
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
Ensure.IsNotNull(groupBy, nameof(groupBy));
Ensure.IsNotNull(output, nameof(output));
var groupByDefinition = new ExpressionAggregateExpressionDefinition <TResult, TValue>(groupBy, aggregate.Options.TranslationOptions);
var outputDefinition = new ExpressionBucketOutputProjection <TResult, TValue, TNewResult>(x => default(TValue), output, aggregate.Options.TranslationOptions);
return(aggregate.BucketAuto(groupByDefinition, buckets, outputDefinition, options));
}