FetchType (Jakarta Persistence API documentation)

java.lang.Object
- java.lang.Enum<FetchType>
- - jakarta.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:

1.0

See Also:

Basic, ElementCollection, ManyToMany, OneToMany, ManyToOne, OneToOne

Enum Constant Summary

Enum Constants
Enum Constant Description

EAGER
Defines that data must be eagerly fetched.

LAZY
Defines that data can be lazily fetched.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static FetchType`	`valueOf(String name)`	Returns the enum constant of this type with the specified name.
`static FetchType[]`	`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, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - 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 Detail
  - values
```
public static FetchType[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (FetchType c : FetchType.values()) System.out.println(c);
    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