org.axiondb.functions

Class ComparisonFunction

java.lang.Object

org.axiondb.BaseSelectable

org.axiondb.functions.BaseFunction

org.axiondb.functions.ComparisonFunction

All Implemented Interfaces:

java.io.Serializable, Function, ConcreteFunction, ScalarFunction, Selectable

Direct Known Subclasses:

EqualFunction, GreaterThanFunction, GreaterThanOrEqualFunction, LessThanFunction, LessThanOrEqualFunction, NotEqualFunction

public abstract class ComparisonFunction
extends BaseFunction
implements ScalarFunction

Version:

$Revision: 1.11 $ $Date: 2005/12/26 20:33:24 $

See Also:

Serialized Form

Field Summary

Fields inherited from class org.axiondb.BaseSelectable

_hash

Constructor Summary

Constructors

Constructor and Description
ComparisonFunction(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	compare(int value)
java.lang.Object	evaluate(RowDecorator row)
ComparisonFunction	flip()
DataType	getDataType()
abstract java.lang.String	getOperatorString()
boolean	isColumnColumn()
boolean	isColumnLiteral()
boolean	isValid()
protected abstract ComparisonFunction	makeFlipFunction()

Methods inherited from class org.axiondb.functions.BaseFunction

addArgument, getArgument, getArgumentCount, setArgument, setVariableContext, toString

Methods inherited from class org.axiondb.BaseSelectable

getAlias, getLabel, getName, setAlias, setName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.axiondb.Function

addArgument, getAlias, getArgument, getArgumentCount, getName, setAlias, setArgument

Methods inherited from interface org.axiondb.Selectable

getLabel, setVariableContext

Constructor Detail

ComparisonFunction

public ComparisonFunction(java.lang.String name)

Method Detail

getDataType

public final DataType getDataType()

Specified by:

getDataType in interface Selectable

Specified by:

getDataType in class BaseFunction

isValid

public final boolean isValid()

Specified by:

isValid in interface ConcreteFunction

Specified by:

isValid in class BaseFunction

evaluate

public final java.lang.Object evaluate(RowDecorator row)
                                throws AxionException

Specified by:

evaluate in interface ScalarFunction

Specified by:

evaluate in interface Selectable

Throws:

AxionException

compare

protected abstract boolean compare(int value)

makeFlipFunction

protected abstract ComparisonFunction makeFlipFunction()

flip

public ComparisonFunction flip()

isColumnColumn

public boolean isColumnColumn()

isColumnLiteral

public boolean isColumnLiteral()

getOperatorString

public abstract java.lang.String getOperatorString()