com.opensymphony.xwork2.inject.util
Enum ReferenceType

java.lang.Object
  extended by java.lang.Enum<ReferenceType>
      extended by com.opensymphony.xwork2.inject.util.ReferenceType
All Implemented Interfaces:
Serializable, Comparable<ReferenceType>

public enum ReferenceType
extends Enum<ReferenceType>

Reference type. Used to specify what type of reference to keep to a referent.

Author:
crazybob@google.com (Bob Lee)
See Also:
Reference

Enum Constant Summary
PHANTOM
          Similar to weak references except the garbage collector doesn't actually reclaim the referent.
SOFT
          Referent reclaimed in an LRU fashion when the VM runs low on memory and no strong references exist.
STRONG
          Prevents referent from being reclaimed by the garbage collector.
WEAK
          Referent reclaimed when no strong or soft references exist.
 
Method Summary
static ReferenceType valueOf(String name)
          Returns the enum constant of this type with the specified name.
static ReferenceType[] 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

STRONG

public static final ReferenceType STRONG
Prevents referent from being reclaimed by the garbage collector.


SOFT

public static final ReferenceType SOFT
Referent reclaimed in an LRU fashion when the VM runs low on memory and no strong references exist.

See Also:
SoftReference

WEAK

public static final ReferenceType WEAK
Referent reclaimed when no strong or soft references exist.

See Also:
WeakReference

PHANTOM

public static final ReferenceType PHANTOM
Similar to weak references except the garbage collector doesn't actually reclaim the referent. More flexible alternative to finalization.

See Also:
PhantomReference
Method Detail

values

public static ReferenceType[] 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 (ReferenceType c : ReferenceType.values())
    System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they are declared

valueOf

public static ReferenceType 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


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