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java.lang.Objectorg.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.BaseAggregateFunction
org.axiondb.functions.ComparableAggregateFunction
public abstract class ComparableAggregateFunction
Field Summary |
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Fields inherited from class org.axiondb.BaseSelectable |
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_hash |
Constructor Summary | |
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ComparableAggregateFunction(java.lang.String name)
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Method Summary | |
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protected abstract java.lang.Comparable |
evaluate(java.lang.Comparable src,
java.lang.Comparable val)
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java.lang.Object |
evaluate(RowDecoratorIterator rows)
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DataType |
getDataType()
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Methods inherited from class org.axiondb.functions.BaseAggregateFunction |
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acceptable, evaluate, isDistinct, isValid, setDistinct, setDistinct |
Methods inherited from class org.axiondb.functions.BaseFunction |
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addArgument, getArgument, getArgumentCount, setArgument, setVariableContext, toString |
Methods inherited from class org.axiondb.BaseSelectable |
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getAlias, getLabel, getName, setAlias, setName |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.axiondb.functions.ConcreteFunction |
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isValid |
Methods inherited from interface org.axiondb.Function |
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addArgument, getAlias, getArgument, getArgumentCount, getName, setAlias, setArgument |
Methods inherited from interface org.axiondb.Selectable |
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evaluate, getLabel, setVariableContext |
Constructor Detail |
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public ComparableAggregateFunction(java.lang.String name)
Method Detail |
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public final DataType getDataType()
getDataType
in interface Selectable
getDataType
in class BaseFunction
public final java.lang.Object evaluate(RowDecoratorIterator rows) throws AxionException
evaluate
in interface AggregateFunction
AxionException
protected abstract java.lang.Comparable evaluate(java.lang.Comparable src, java.lang.Comparable val)
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