|
Oracle® Coherence Java API Reference Release 3.7.1.0 E22843-01 |
|||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object
com.tangosol.util.Base
com.tangosol.util.aggregator.Count
public class Count
Calculates a number of values in an entry set.
Constructor Summary | |
---|---|
Count() Default constructor (necessary for the ExternalizableLite interface). |
Method Summary | |
---|---|
java.lang.Object |
aggregate(java.util.Set setEntries) Process a set of InvocableMap.Entry objects in order to produce an aggregated result. |
java.lang.Object |
aggregateResults(java.util.Collection collResults) Aggregate the results of the parallel aggregations. |
InvocableMap.EntryAggregator |
getParallelAggregator() Get an aggregator that can take the place of this aggregator in situations in which the InvocableMap can aggregate in parallel. |
void |
readExternal(java.io.DataInput in) Restore the contents of this object by loading the object's state from the passed DataInput object. |
void |
readExternal(PofReader in) Restore the contents of a user type instance by reading its state using the specified PofReader object. |
void |
writeExternal(java.io.DataOutput out) Save the contents of this object by storing the object's state into the passed DataOutput object. |
void |
writeExternal(PofWriter out) Save the contents of a POF user type instance by writing its state using the specified PofWriter object. |
Constructor Detail |
---|
public Count()
Method Detail |
---|
public java.lang.Object aggregate(java.util.Set setEntries)
aggregate
in interface InvocableMap.EntryAggregator
setEntries
- a Set of read-only InvocableMap.Entry objects to aggregatepublic InvocableMap.EntryAggregator getParallelAggregator()
getParallelAggregator
in interface InvocableMap.ParallelAwareAggregator
public java.lang.Object aggregateResults(java.util.Collection collResults)
aggregateResults
in interface InvocableMap.ParallelAwareAggregator
collResults
- the parallel aggregation resultspublic void readExternal(java.io.DataInput in) throws java.io.IOException
readExternal
in interface ExternalizableLite
in
- the DataInput stream to read data from in order to restore the state of this objectjava.io.IOException
- if an I/O exception occursjava.io.NotActiveException
- if the object is not in its initial state, and therefore cannot be deserialized intopublic void writeExternal(java.io.DataOutput out) throws java.io.IOException
writeExternal
in interface ExternalizableLite
out
- the DataOutput stream to write the state of this object tojava.io.IOException
- if an I/O exception occurspublic void readExternal(PofReader in) throws java.io.IOException
readExternal
in interface PortableObject
in
- the PofReader from which to read the object's statejava.io.IOException
- if an I/O error occurspublic void writeExternal(PofWriter out) throws java.io.IOException
writeExternal
in interface PortableObject
out
- the PofWriter to which to write the object's statejava.io.IOException
- if an I/O error occurs
|
Oracle® Coherence Java API Reference Release 3.7.1.0 E22843-01 |
|||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |