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java.lang.Objectorg.axiondb.BaseSelectable
org.axiondb.functions.BaseFunction
org.axiondb.functions.SignFunction
public class SignFunction
Returns an indicator of the sign of the given double
value. If the value
is less than zero, -1 is returned. If the value equals zero, 0 is returned. If the
value is greater than zero, 1 is returned.
Field Summary |
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Fields inherited from class org.axiondb.BaseSelectable |
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_hash |
Constructor Summary | |
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SignFunction()
Creates a new instance of Class |
Method Summary | |
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java.lang.Object |
evaluate(RowDecorator row)
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DataType |
getDataType()
IntegerType |
boolean |
isValid()
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ConcreteFunction |
makeNewInstance()
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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.Function |
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addArgument, getAlias, getArgument, getArgumentCount, getName, setAlias, setArgument |
Methods inherited from interface org.axiondb.Selectable |
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getLabel, setVariableContext |
Constructor Detail |
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public SignFunction()
Method Detail |
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public ConcreteFunction makeNewInstance()
makeNewInstance
in interface FunctionFactory
public DataType getDataType()
IntegerType
getDataType
in interface Selectable
getDataType
in class BaseFunction
public java.lang.Object evaluate(RowDecorator row) throws AxionException
evaluate
in interface ScalarFunction
evaluate
in interface Selectable
AxionException
public boolean isValid()
isValid
in interface ConcreteFunction
isValid
in class BaseFunction
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