Package com.blazebit.persistence.view

Enum FetchStrategy

java.lang.Object
java.lang.Enum<FetchStrategy>
com.blazebit.persistence.view.FetchStrategy
All Implemented Interfaces:
Serializable, Comparable<FetchStrategy>, java.lang.constant.Constable
public enum FetchStrategy
extends Enum<FetchStrategy>
The fetch strategy for an entity view attribute.
Since:
1.2.0
Author:
Christian Beikov

  • Nested Class Summary

    Nested classes/interfaces inherited from class java.lang.Enum

    Enum.EnumDesc<E extends Enum<E>>

  • Enum Constant Summary

    Enum Constants 
    Enum Constant Description
    JOIN
    A strategy that defines that the target elements are joined and fetched along in the source query.
    MULTISET
    A strategy that defines that the target elements are joined and fetched along in the source query as multiset.
    SELECT
    A strategy that defines that the target elements are selected in separate queries.
    SUBSELECT
    A strategy that defines that the target elements are selected in a single query containing the source query as subquery.

  • Method Summary

    Modifier and Type Method Description
    static FetchStrategy valueOf​(String name)
    Returns the enum constant of this type with the specified name.
    static FetchStrategy[] values()
    Returns an array containing the constants of this enum type, in the order they are declared.

    Methods inherited from class java.lang.Enum

    clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • JOIN

      public static final FetchStrategy JOIN
      A strategy that defines that the target elements are joined and fetched along in the source query.

    • SELECT

      public static final FetchStrategy SELECT
      A strategy that defines that the target elements are selected in separate queries. Depending on the defined BatchFetch.size(), the query select multiple elements at once.

    • SUBSELECT

      public static final FetchStrategy SUBSELECT
      A strategy that defines that the target elements are selected in a single query containing the source query as subquery.

    • MULTISET

      public static final FetchStrategy MULTISET
      A strategy that defines that the target elements are joined and fetched along in the source query as multiset.
      Since:
      1.5.0

  • Method Details

    • values

      public static FetchStrategy[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      Returns:
      an array containing the constants of this enum type, in the order they are declared

    • valueOf

      public static FetchStrategy valueOf​(String name)
      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum type has no constant with the specified name
      NullPointerException - if the argument is null