WeakReference

scala.ref.WeakReference

See theWeakReference companion object

classWeakReference[+T <:AnyRef](value:T,queue:ReferenceQueue[T]) extendsReferenceWrapper[T]

A wrapper class for java.lang.ref.WeakReference The new functionality is (1) results are Option values, instead of using null. (2) There is an extractor that maps the weak reference itself into an option.

Attributes

Companion: object
Source: WeakReference.scala
Graph
Supertypes: traitReferenceWrapper[T]
traitProxy
traitReference[T]
trait ()=>T
classObject
traitMatchable
classAny
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Members list

Value members

Constructors

defthis(value:T)

Attributes

Source: WeakReference.scala

Inherited methods

defapply():T

return the underlying value

Attributes

Inherited from:: ReferenceWrapper
Source: ReferenceWrapper.scala

defclear():Unit

Attributes

Inherited from:: ReferenceWrapper
Source: ReferenceWrapper.scala

defenqueue():Boolean

Attributes

Inherited from:: ReferenceWrapper
Source: ReferenceWrapper.scala

overridedefequals(that:Any):Boolean

Compares the receiver object (this) with the argument object (that) for equivalence.

Any implementation of this method should be anequivalence relation:

- It is reflexive: for any instancex of typeAny,x.equals(x) should returntrue. - It is symmetric: for any instancesx andy of typeAny,x.equals(y) should returntrue if and only ify.equals(x) returnstrue. - It is transitive: for any instancesx,y, andz of typeAny ifx.equals(y) returnstrue andy.equals(z) returnstrue, thenx.equals(z) should returntrue.

If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to overridehashCode to ensure that objects which are "equal" (o1.equals(o2) returnstrue) hash to the samescala.Int. (o1.hashCode.equals(o2.hashCode)).

Value parameters

that: the object to compare against this object for equality.

Attributes

Returns: true if the receiver object is equivalent to the argument;false otherwise.
Definition Classes: Proxy ->Any
Inherited from:: Proxy
Source: Proxy.scala

overridedefget:Option[T]

returnSome underlying if it hasn't been collected, otherwiseNone

Attributes

Definition Classes: ReferenceWrapper ->Reference
Inherited from:: ReferenceWrapper
Source: ReferenceWrapper.scala

overridedefhashCode:Int

Calculates a hash code value for the object.

The default hashing algorithm is platform dependent.

Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returnsfalse). A degenerate implementation could always return0. However, it is required that if two objects are equal (o1.equals(o2) returnstrue) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with theequals method.