Package org.apache.struts2.inject.util
Enum Class ReferenceType
- All Implemented Interfaces:
Serializable
,Comparable<ReferenceType>
,Constable
Reference type. Used to specify what type of reference to keep to a
referent.
- Author:
- crazybob@google.com (Bob Lee)
- 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
Enum ConstantsEnum ConstantDescriptionSimilar to weak references except the garbage collector doesn't actually reclaim the referent.Referent reclaimed in an LRU fashion when the VM runs low on memory and no strong references exist.Prevents referent from being reclaimed by the garbage collector.Referent reclaimed when no strong or soft references exist. -
Method Summary
Modifier and TypeMethodDescriptionstatic ReferenceType
Returns the enum constant of this class with the specified name.static ReferenceType[]
values()
Returns an array containing the constants of this enum class, in the order they are declared.
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Enum Constant Details
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STRONG
Prevents referent from being reclaimed by the garbage collector. -
SOFT
Referent reclaimed in an LRU fashion when the VM runs low on memory and no strong references exist.- See Also:
-
WEAK
Referent reclaimed when no strong or soft references exist.- See Also:
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PHANTOM
Similar to weak references except the garbage collector doesn't actually reclaim the referent. More flexible alternative to finalization.- See Also:
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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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