Package org.openjdk.jmc.common.item

Interface IItemCollection

All Superinterfaces:
Iterable<IItemIterable>
public interface IItemCollection extends Iterable<IItemIterable>
An immutable collection of items.

  • Method Details

    • apply

      IItemCollection apply(IItemFilter filter)
      Creates a new item collection with all items in this collection that pass through the filter. The collection may be eagerly or lazily evaluated.
      Parameters:
      filter - the filter to use when selecting items for the new collection
      Returns:
      a new collection of items

    • getAggregate

      <V, C extends IItemConsumer<C>> V getAggregate(IAggregator<V,C> aggregator)
      Calculates an aggregated value for the items in this collection.
      Type Parameters:
      V - aggregate result value type
      C - Item consumer type. See IAggregator.
      Returns:
      the aggregated value

    • hasItems

      boolean hasItems()
      Returns:
      true if the collections contains items, false otherwise

    • getUnfilteredTimeRanges

      @Deprecated Set<IRange<IQuantity>> getUnfilteredTimeRanges()
      Deprecated.
      see https://bugs.openjdk.java.net/browse/JMC-7103.
      Returns a set of IRange representations of the time ranges represented by this item collection. This set is not affected by any filtering operations on the item collection since its use is to show the time ranges in which events could possibly have been occurred.
      Returns:
      a set of IRange objects representing the time ranges available in this IItemCollection

    • stream

      default Stream<IItemIterable> stream()
      Creates a new sequential Stream of IItemIterable from the IItemCollection.
      Returns:
      a new sequential Stream

    • parallelStream

      default Stream<IItemIterable> parallelStream()
      Creates a new parallel Stream of IItemIterable from the IItemCollection.
      Returns:
      a new parallel Stream

    • values

      default <T> Supplier<Stream<T>> values(IAttribute<T> attribute)
      Returns the values for the supplied attribute from this IItemCollection.
      Type Parameters:
      T - the type of the attribute, e.g. IQuantity.
      Parameters:
      attribute - the attribute to retrieve values for.
      Returns:
      a stream of values.