Package org.hibernate.annotations
Enum FetchMode
- java.lang.Object
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- java.lang.Enum<FetchMode>
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- org.hibernate.annotations.FetchMode
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- All Implemented Interfaces:
Serializable
,Comparable<FetchMode>
public enum FetchMode extends Enum<FetchMode>
Fetch options on associations. Defines more of the "how" of fetching, whereas JPAFetchType
focuses on the "when".
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Enum Constant Summary
Enum Constants Enum Constant Description JOIN
Use an outer join to load the related entities, collections or joins.SELECT
Use a secondary select for each individual entity, collection, or join load.SUBSELECT
Available for collections only. When accessing a non-initialized collection, this fetch mode will trigger loading all elements of all collections of the same role for all owners associated with the persistence context using a single secondary select.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static FetchMode
valueOf(String name)
Returns the enum constant of this type with the specified name.static FetchMode[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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SELECT
public static final FetchMode SELECT
Use a secondary select for each individual entity, collection, or join load.
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JOIN
public static final FetchMode JOIN
Use an outer join to load the related entities, collections or joins.
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SUBSELECT
public static final FetchMode SUBSELECT
Available for collections only. When accessing a non-initialized collection, this fetch mode will trigger loading all elements of all collections of the same role for all owners associated with the persistence context using a single secondary select.
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Method Detail
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values
public static FetchMode[] 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 (FetchMode c : FetchMode.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 FetchMode 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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