org.axiondb.functions

Class BaseFunction

java.lang.Object

org.axiondb.BaseSelectable

org.axiondb.functions.BaseFunction

All Implemented Interfaces:

java.io.Serializable, Function, ConcreteFunction, Selectable

Direct Known Subclasses:

ABSFunction, ArithmeticFunction, AsciiFunction, Base64DecodeFunction, Base64EncodeFunction, BaseAggregateFunction, BaseBooleanBranchFunction, BaseRegExpFunction, BitAndFunction, BitOrFunction, CastAsFunction, CharFunction, CharToDateFunction, CoalesceFunction, ComparisonFunction, ConcatFunction, ContainsFunction, DateAddFunction, DateDiffFunction, DatePartFunction, DateToCharFunction, ExistsFunction, FunctionIdentifier, HexFunction, IfThenFunction, InFunction, InStringFunction, IsNotNullFunction, IsNullFunction, IsValidDateTimeFunction, LengthFunction, Log10Function, LowerFunction, LPadFunction, LTrimFunction, ModFunction, NotFunction, NotInFunction, NowFunction, NullIfFunction, ReplaceFunction, RoundFunction, RowNumFunction, RPadFunction, RTrimFunction, SignFunction, SoundexFunction, SpaceFunction, SubstringFunction, TrimFunction, TruncateFunction, UpperFunction

public abstract class BaseFunction
extends BaseSelectable
implements ConcreteFunction

An abstract base ConcreteFunctionimplementation.

Version:

$Revision: 1.11 $ $Date: 2005/12/20 18:32:28 $

See Also:

Serialized Form

Field Summary

Fields inherited from class org.axiondb.BaseSelectable

_hash

Constructor Summary

Constructors

Constructor and Description
BaseFunction(java.lang.String name)
BaseFunction(java.lang.String name, java.util.List args)

Method Summary

Modifier and Type	Method and Description
void	addArgument(Selectable arg) Append the given Selectableto my argument list.
Selectable	getArgument(int i) Returns the Selectableat the given index.
int	getArgumentCount() Returns the number of arguments in my argument list.
abstract DataType	getDataType()
abstract boolean	isValid()
void	setArgument(int i, Selectable arg)
void	setVariableContext(VariableContext context)
java.lang.String	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

getAlias, getName, setAlias

Methods inherited from interface org.axiondb.Selectable

evaluate, getLabel

Constructor Detail

BaseFunction

public BaseFunction(java.lang.String name)

BaseFunction

public BaseFunction(java.lang.String name,
                    java.util.List args)

Method Detail

addArgument

public void addArgument(Selectable arg)

Description copied from interface: Function

Append the given Selectableto my argument list.

Specified by:

addArgument in interface Function

getArgument

public Selectable getArgument(int i)

Description copied from interface: Function

Returns the Selectableat the given index.

Specified by:

getArgument in interface Function

getArgumentCount

public int getArgumentCount()

Description copied from interface: Function

Returns the number of arguments in my argument list.

Specified by:

getArgumentCount in interface Function

getDataType

public abstract DataType getDataType()

Specified by:

getDataType in interface Selectable

isValid

public abstract boolean isValid()

Specified by:

isValid in interface ConcreteFunction

setArgument

public void setArgument(int i,
                        Selectable arg)

Specified by:

setArgument in interface Function

setVariableContext

public void setVariableContext(VariableContext context)

Specified by:

setVariableContext in interface Selectable

Overrides:

setVariableContext in class BaseSelectable

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object