EDU.oswego.cs.dl.util.concurrent
Class ConcurrentReaderHashMap.Entry
protected static
class
ConcurrentReaderHashMap.Entry
extends Object
implements Entry
ConcurrentReaderHashMap collision list entry.
protected final int hash
protected final Object key
protected volatile Object value
public boolean equals(Object o)
public Object getKey()
public Object getValue()
Get the value. Note: In an entrySet or entrySet.iterator,
unless the set or iterator is used under synchronization of the
table as a whole (or you can otherwise guarantee lack of
concurrent modification),
getValue might
return null, reflecting the fact that the entry has been
concurrently removed. However, there are no assurances that
concurrent removals will be reflected using this method.
Returns: the current value, or null if the entry has been
detectably removed.
public int hashCode()
public Object setValue(Object value)
Set the value of this entry. Note: In an entrySet or
entrySet.iterator), unless the set or iterator is used under
synchronization of the table as a whole (or you can otherwise
guarantee lack of concurrent modification),
setValue
is not strictly guaranteed to actually replace the value field
obtained via the
get operation of the underlying hash
table in multithreaded applications. If iterator-wide
synchronization is not used, and any other concurrent
put or
remove operations occur, sometimes
even to
other entries, then this change is not
guaranteed to be reflected in the hash table. (It might, or it
might not. There are no assurances either way.)
Parameters: value the new value.
Returns: the previous value, or null if entry has been detectably
removed.
Throws: NullPointerException if the value is null
.
public String toString()