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com.tangosol.util.aggregator
Class LongSum
java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.aggregator.AbstractAggregator
com.tangosol.util.aggregator.AbstractLongAggregator
com.tangosol.util.aggregator.LongSum
- All Implemented Interfaces:
- ExternalizableLite, PortableObject, InvocableMap.EntryAggregator, InvocableMap.ParallelAwareAggregator, java.io.Serializable
-
public class LongSum
- extends AbstractLongAggregator
Sums up numeric values extracted from a set of entries in a Map. All the extracted Number objects will be treated as Java long values.
- Since:
- Coherence 3.1
- Author:
- gg 2005.09.05
Constructor Summary |
LongSum()
Default constructor (necessary for the ExternalizableLite interface). |
LongSum(java.lang.String sMethod)
Construct a LongSum aggregator. |
LongSum(ValueExtractor extractor)
Construct a LongSum aggregator. |
Method Summary |
protected void |
init(boolean fFinal)
Initialize the aggregation result. |
protected void |
process(java.lang.Object o, boolean fFinal)
Incorporate one aggregatable value into the result. |
Methods inherited from class com.tangosol.util.aggregator.AbstractAggregator |
aggregate, aggregateResults, equals, getParallelAggregator, getValueExtractor, hashCode, processEntry, readExternal, readExternal, toString, writeExternal, writeExternal |
Methods inherited from class com.tangosol.util.BitHelper |
countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, rotateLeft, rotateLeft, rotateLeft, rotateRight, rotateRight, rotateRight, toBitString, toBitString, toBitString |
LongSum
public LongSum()
- Default constructor (necessary for the ExternalizableLite interface).
LongSum
public LongSum(ValueExtractor extractor)
- Construct a LongSum aggregator.
- Parameters:
extractor
- the extractor that provides a value in the form of any Java object that is a Number
LongSum
public LongSum(java.lang.String sMethod)
- Construct a LongSum aggregator.
- Parameters:
sMethod
- the name of the method that returns a value in the form of any Java object that is a Number
init
protected void init(boolean fFinal)
- Initialize the aggregation result.
-
- Overrides:
init
in class AbstractLongAggregator
-
- Parameters:
fFinal
- true is passed if the aggregation process that is being initialized must produce a final aggregation result; this will only be false if a parallel approach is being used and the initial (partial) aggregation process is being initialized
process
protected void process(java.lang.Object o,
boolean fFinal)
- Incorporate one aggregatable value into the result.
If the fFinal parameter is true, the given object is a partial result (returned by an individual parallel aggregator) that should be incorporated into the final result; otherwise, the object is a value extracted from an InvocableMap.Entry
.
-
- Specified by:
process
in class AbstractAggregator
-
- Parameters:
o
- the value to incorporate into the aggregated result
fFinal
- true to indicate that the given object is a partial result returned by a parallel aggregator
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