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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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java.lang.Objectcom.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.aggregator.AbstractAggregator
com.tangosol.util.aggregator.AbstractBigDecimalAggregator
public abstract class AbstractBigDecimalAggregator
Abstract aggregator that processes Comparable
values extracted from
a set of entries in a Map and returns a result in a form of a
BigDecimal
value. All the extracted objects will be
treated as BigDecimal
, BigInteger
or
Java double values.
If the set of entries is empty, a null result is returned.
Field Summary | |
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protected int |
m_count
The count of processed entries. |
protected BigDecimal |
m_decResult
The running result value. |
Fields inherited from class com.tangosol.util.aggregator.AbstractAggregator |
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m_fParallel |
Constructor Summary | |
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AbstractBigDecimalAggregator()
Default constructor (necessary for the ExternalizableLite interface). |
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AbstractBigDecimalAggregator(String sMethod)
Construct an AbstractBigDecimalAggregator object. |
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AbstractBigDecimalAggregator(ValueExtractor extractor)
Construct an AbstractBigDecimalAggregator object. |
Method Summary | |
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static BigDecimal |
ensureBigDecimal(Number num)
Ensure the specified Number is a BigDecimal value or convert it into a new BigDecimal object. |
protected Object |
finalizeResult(boolean fFinal)
Obtain the result of the aggregation. |
protected void |
init(boolean fFinal)
Initialize the aggregation result. |
Methods inherited from class com.tangosol.util.aggregator.AbstractAggregator |
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aggregate, aggregateResults, equals, getParallelAggregator, getValueExtractor, hashCode, process, readExternal, readExternal, toString, writeExternal, writeExternal |
Methods inherited from class com.tangosol.util.BitHelper |
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countBits, countBits, countBits, indexOfLSB, indexOfLSB, indexOfLSB, indexOfMSB, indexOfMSB, indexOfMSB, toBitString, toBitString, toBitString |
Field Detail |
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protected transient int m_count
protected transient BigDecimal m_decResult
Constructor Detail |
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public AbstractBigDecimalAggregator()
public AbstractBigDecimalAggregator(ValueExtractor extractor)
extractor
- the extractor that provides a value in the form of
any Java object that is a Number
public AbstractBigDecimalAggregator(String sMethod)
sMethod
- the name of the method that returns a value in the form
of any Java object that is a Number
Method Detail |
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protected void init(boolean fFinal)
init
in class AbstractAggregator
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 initializedprotected Object finalizeResult(boolean fFinal)
finalizeResult
in class AbstractAggregator
fFinal
- true to indicate that the final result of the
aggregation process should be returned; this will only
be false if a parallel approach is being used
public static BigDecimal ensureBigDecimal(Number num)
num
- a Number object
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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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