Package org.dizitart.no2.common

Interface RecordStream<T>

  • Type Parameters:
    T - the type parameter for the records in the stream
    All Superinterfaces:
    Iterable<T>
    All Known Subinterfaces:
    Cursor<T>, DocumentCursor
    public interface RecordStream<T>
extends Iterable<T>
    An interface representing a stream of records of type T. Provides methods to create, manipulate and iterate over a stream of records.
    Since:
    1.0
    Author:
    Anindya Chatterjee.

    • Method Detail

      • fromIterable

        static <T> RecordStream<T> fromIterable​(Iterable<T> iterable)
        Creates a RecordStream from an Iterable.
        Type Parameters:
        T - the type parameter
        Parameters:
        iterable - the iterable
        Returns:
        the record stream

      • fromCombined

        static <T> RecordStream<T> fromCombined​(Iterable<T> first,
                                        Iterable<T> second)
        Creates a RecordStream by combining two Iterables.
        Type Parameters:
        T - the type parameter
        Parameters:
        first - the first
        second - the second
        Returns:
        the record stream

      • except

        static <T> RecordStream<T> except​(Iterable<T> iterable,
                                  Collection<T> elements)
        Creates a RecordStream by eliminating elements from an Iterable.
        Type Parameters:
        T - the type parameter
        Parameters:
        iterable - the iterable
        elements - the elements
        Returns:
        the record stream

      • empty

        static <V> RecordStream<V> empty()
        Creates an empty RecordStream.
        Type Parameters:
        V - the type parameter
        Returns:
        the record stream

      • single

        static <V> RecordStream<V> single​(V v)
        Creates a RecordStream with a single element.
        Type Parameters:
        V - the type parameter
        Parameters:
        v - the v
        Returns:
        the record stream

      • size

        default long size()
        Gets the size of the RecordStream.
        Returns:
        the long

      • toList

        default List<T> toList()
        Creates a List from a RecordStream by iterating it.
        Returns:
        the list

      • toSet

        default Set<T> toSet()
        Creates a Set from a RecordStream by iterating it.
        Returns:
        the set

      • isEmpty

        default boolean isEmpty()
        Checks if this RecordStream has any elements or not.
        Returns:
        the boolean

      • firstOrNull

        default T firstOrNull()
        Gets the first element of the result or null if it is empty.
        Returns:
        the first element or null