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author | Rebecca Claire Murphy <rebecca.murphy@chirondigital.com> | 2015-10-22 14:44:45 -0400 |
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committer | Rebecca Claire Murphy <rebecca.murphy@chirondigital.com> | 2015-10-22 14:44:45 -0400 |
commit | 168575d9f42e424bb138f05251a3a86eb01adf80 (patch) | |
tree | bb58ccb933c28e9956cbb723702392d3ce530bf9 /src | |
parent | 462dc9af886391c9c31cb6949b15e69b0cab55ef (diff) | |
download | scala-168575d9f42e424bb138f05251a3a86eb01adf80.tar.gz scala-168575d9f42e424bb138f05251a3a86eb01adf80.tar.bz2 scala-168575d9f42e424bb138f05251a3a86eb01adf80.zip |
Add Extractor and apply Method for SoftReference
scala.ref.WeakReference has two features which are lacking in
scala.ref.SoftReference, an extractor and
a .apply method that greatly enhance the usability of
that class. This commit simply replicates that functionality for
SoftReference.
Diffstat (limited to 'src')
-rw-r--r-- | src/library/scala/ref/SoftReference.scala | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/library/scala/ref/SoftReference.scala b/src/library/scala/ref/SoftReference.scala index e4ce667981..5e60f00788 100644 --- a/src/library/scala/ref/SoftReference.scala +++ b/src/library/scala/ref/SoftReference.scala @@ -20,6 +20,19 @@ class SoftReference[+T <: AnyRef](value : T, queue : ReferenceQueue[T]) extends } /** + * A companion object that implements an extractor for `SoftReference` values + * @author Rebecca Claire Murphy + */ +object SoftReference { + + /** Creates a `SoftReference` pointing to `value` */ + def apply[T <: AnyRef](value: T) = new SoftReference(value) + + /** Optionally returns the referenced value, or `None` if that value no longer exists */ + def unapply[T <: AnyRef](sr: SoftReference[T]): Option[T] = Option(sr.underlying.get) +} + +/** * @author Philipp Haller */ private class SoftReferenceWithWrapper[T <: AnyRef](value: T, queue: ReferenceQueue[T], val wrapper: SoftReference[T]) |