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Oracle® Coherence Java API Reference
Release 3.7.0.0

E18683-01


com.tangosol.util
Class SegmentedHashMap.ContainsValueAction

java.lang.Object
  extended by com.tangosol.util.SegmentedHashMap.EntryActionAdapter
      extended by com.tangosol.util.SegmentedHashMap.ContainsValueAction

All Implemented Interfaces:
SegmentedHashMap.EntryAction, SegmentedHashMap.IterableEntryAction
Enclosing class:
SegmentedHashMap

protected static class SegmentedHashMap.ContainsValueAction
extends SegmentedHashMap.EntryActionAdapter

Action support for containsValue(). The action performs a lookup by value and is not required to run while holding any segment-locks.

The context object for a ContainsValueAction is an opaque context created by instantiateContext.

The result of invoking a ContainsValueAction is Boolean.TRUE if the value is found in the map or Boolean.FALSE if the value is not found in the map.


Constructor Summary
protected SegmentedHashMap.ContainsValueAction()
           

 

Method Summary
 java.lang.Object instantiateContext(java.lang.Object oValue)
          Instantiate a context appropriate for applying ContainsValueAction to lookup oValue in the map.
 java.lang.Object invokeFound(java.lang.Object oKey, java.lang.Object oContext, SegmentedHashMap.Entry[] aeBucket, int nBucket, SegmentedHashMap.Entry entryPrev, SegmentedHashMap.Entry entryCur)
          Invoke some action, holding the segment lock, when a matching Entry is found.
 boolean isComplete(java.lang.Object oContext)
          Return true iff further key evaluations for the given context are known to be unnecessary.
 boolean isFound(java.lang.Object oContext)
          Return true iff the value was found

 

Methods inherited from class com.tangosol.util.SegmentedHashMap.EntryActionAdapter
invokeNotFound

 

Constructor Detail

SegmentedHashMap.ContainsValueAction

protected SegmentedHashMap.ContainsValueAction()

Method Detail

invokeFound

public java.lang.Object invokeFound(java.lang.Object oKey,
                                    java.lang.Object oContext,
                                    SegmentedHashMap.Entry[] aeBucket,
                                    int nBucket,
                                    SegmentedHashMap.Entry entryPrev,
                                    SegmentedHashMap.Entry entryCur)
Invoke some action, holding the segment lock, when a matching Entry is found.
Specified by:
invokeFound in interface SegmentedHashMap.EntryAction
Overrides:
invokeFound in class SegmentedHashMap.EntryActionAdapter
Parameters:
oKey - the key to which the action is applied
oContext - opaque context specific to the action
aeBucket - the bucket array
nBucket - the index into the bucket array
entryPrev - the Entry object immediately preceding the Entry that was found, or null
entryCur - the Entry object that was found
Returns:
an opaque result value

isComplete

public boolean isComplete(java.lang.Object oContext)
Return true iff further key evaluations for the given context are known to be unnecessary.
Specified by:
isComplete in interface SegmentedHashMap.IterableEntryAction
Overrides:
isComplete in class SegmentedHashMap.EntryActionAdapter
Parameters:
oContext - the action context
Returns:
true iff further evaluations are unnecessary

isFound

public boolean isFound(java.lang.Object oContext)
Return true iff the value was found
Parameters:
oContext - the ContainsValueContext object
Returns:
true iff the value was found

instantiateContext

public java.lang.Object instantiateContext(java.lang.Object oValue)
Instantiate a context appropriate for applying ContainsValueAction to lookup oValue in the map.
Parameters:
oValue - the value to test the existence of
Returns:
a context to use with a ContainsValueAction

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Oracle® Coherence Java API Reference
Release 3.7.0.0

E18683-01


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