Package io.jmix.flowui.data.aggregation

Interface Aggregation<T>

Type Parameters:
T - the type of the items to be aggregated
All Known Implementing Classes:
AbstractAggregation, AbstractNumberAggregation, BigDecimalAggregation, BigIntegerAggregation, CountAggregation, DateAggregation, DateTimeAggregation, DoubleAggregation, LocalDateAggregation, LocalDateTimeAggregation, LocalTimeAggregation, LongAggregation, OffsetDateTimeAggregation, OffsetTimeAggregation, TimeAggregation
public interface Aggregation<T>
Defines methods for performing aggregation operations on a collection of items.

  • Method Summary

    Modifier and Type
    Method
    Description
    T
    avg(Collection<T> items)
    Computes the average value of the elements in the provided collection.
    int
    count(Collection<T> items)
    Counts the number of elements in the provided collection.
    Class<T>
    getResultClass()
    Returns the class type of the result produced by this aggregation.
    EnumSet<AggregationInfo.Type>
    getSupportedAggregationTypes()
    Returns the set of aggregation types that are supported by this class.
    T
    max(Collection<T> items)
    Determines the maximum value in the provided collection of items.
    T
    min(Collection<T> items)
    Determines the minimum value in the provided collection of items.
    T
    sum(Collection<T> items)
    Calculates the sum of the provided collection of items.

  • Method Details

    • sum

      @Nullable T sum(Collection<T> items)
      Calculates the sum of the provided collection of items.
      Parameters:
      items - the collection of items to be summed
      Returns:
      the sum of the items, or null if the collection is empty

    • avg

      @Nullable T avg(Collection<T> items)
      Computes the average value of the elements in the provided collection.
      Parameters:
      items - the collection of elements to be averaged
      Returns:
      the average value of the elements, or null if the collection is empty

    • min

      @Nullable T min(Collection<T> items)
      Determines the minimum value in the provided collection of items.
      Parameters:
      items - the collection of items to evaluate for the minimum value
      Returns:
      the minimum value from the collection, or null if the collection is empty

    • max

      @Nullable T max(Collection<T> items)
      Determines the maximum value in the provided collection of items.
      Parameters:
      items - the collection of items to evaluate for the maximum value
      Returns:
      the maximum value from the collection, or null if the collection is empty

    • count

      int count(Collection<T> items)
      Counts the number of elements in the provided collection.
      Parameters:
      items - the collection of items to be counted
      Returns:
      the total number of elements in the collection

    • getResultClass

      Class<T> getResultClass()
      Returns the class type of the result produced by this aggregation.
      Returns:
      the class representing the type of the result

    • getSupportedAggregationTypes

      EnumSet<AggregationInfo.Type> getSupportedAggregationTypes()
      Returns the set of aggregation types that are supported by this class.
      Returns:
      a set of supported aggregation types