- java.lang.Object
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- java.lang.Enum<FetchType>
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- jakarta.persistence.FetchType
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- All Implemented Interfaces:
Serializable
,Comparable<FetchType>
public enum FetchType extends Enum<FetchType>
Defines strategies for fetching data from the database. TheEAGER
strategy is a requirement on the persistence provider runtime that data must be eagerly fetched. TheLAZY
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 theLAZY
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
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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.
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Method Detail
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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
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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 nameNullPointerException
- if the argument is null
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