Package javax.persistence
Enum Class FetchType
- All Implemented Interfaces:
Serializable
,Comparable<FetchType>
,Constable
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:
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Nested Class Summary
Nested classes/interfaces inherited from class java.lang.Enum
Enum.EnumDesc<E extends Enum<E>>
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Enum Constant Summary
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Method Summary
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Enum Constant Details
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LAZY
Defines that data can be lazily fetched. -
EAGER
Defines that data must be eagerly fetched.
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Method Details
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values
Returns an array containing the constants of this enum class, in the order they are declared.- Returns:
- an array containing the constants of this enum class, in the order they are declared
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valueOf
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified nameNullPointerException
- if the argument is null
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