Module persistence.api
Package javax.persistence

Enum FetchType

java.lang.Object
java.lang.Enum<FetchType>
javax.persistence.FetchType
All Implemented Interfaces:
Serializable, Comparable<FetchType>
public enum FetchType extends Enum<FetchType>
Defines strategies for fetching data from the database. The EAGER strategy is a requirement on the persistence provider runtime that data must be eagerly fetched. The LAZY strategy is a hint to the persistence provider runtime that data should be fetched lazily when it is first accessed. The implementation is permitted to eagerly fetch data for which the LAZY strategy hint has been specified. 

   Example:
   @Basic(fetch=LAZY)
   protected String getName() { return name; }
Since:
Java Persistence 1.0
See Also:

  • Enum Constant Details

    • LAZY

      public static final FetchType LAZY
      Defines that data can be lazily fetched.

    • EAGER

      public static final FetchType EAGER
      Defines that data must be eagerly fetched.

  • Method Details

    • values

      public static FetchType[] 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 FetchType 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