org.axiondb.functions
Class BaseFunction

java.lang.Object
  org.axiondb.BaseSelectable
      org.axiondb.functions.BaseFunction

All Implemented Interfaces:

ConcreteFunction, Function, Selectable, Serializable

Direct Known Subclasses:

ABSFunction, AggregateBigDecimalFunction, ArithmeticFunction, AsciiFunction, AverageFunction, Base64DecodeFunction, Base64EncodeFunction, BaseBooleanBranchFunction, BitAndFunction, BitOrFunction, CastAsFunction, CharFunction, CharToDateFunction, CoalesceFunction, ComparisonFunction, ConcatFunction, ContainsFunction, CountFunction, DateAddFunction, DateDiffFunction, DatePartFunction, DateToCharFunction, ExistsFunction, IfThenFunction, InFunction, InStringFunction, IsNotNullFunction, IsNullFunction, IsValidDateTimeFunction, LengthFunction, LikeToRegexpFunction, Log10Function, LowerFunction, LPadFunction, LTrimFunction, MatchesFunction, ModFunction, NotExistsFunction, NotFunction, NotInFunction, NowFunction, ReplaceFunction, RoundFunction, RowNumFunction, RPadFunction, RTrimFunction, SignFunction, SoundexFunction, SpaceFunction, SubstringFunction, TruncateFunction, UpperFunction

public abstract class BaseFunction

extends BaseSelectable

implements ConcreteFunction

An abstract base ConcreteFunctionimplementation.

Version:

$Revision: 1.9 $ $Date: 2004/07/30 01:46:15 $

See Also:

Serialized Form

Constructor Summary

BaseFunction(String name)

Method Summary

void	addArgument(Selectable arg) Append the given Selectableto my argument list.
String	getAlias() Returns the Alias name of this function.
Selectable	getArgument(int i) Returns the Selectableat the given index.
int	getArgumentCount() Returns the number of arguments in my argument list.
abstract DataType	getDataType()
String	getLabel() Returns my function alias or name.
String	getName() Returns the cannonical name of this function.
abstract boolean	isValid()
void	setAlias(String alias) Set the Alias name of this function.
void	setArgument(int i, Selectable arg)
void	setName(String name)
void	setVariableContext(VariableContext context)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.Selectable

evaluate

Constructor Detail

BaseFunction

public BaseFunction(String name)

Method Detail

getDataType

public abstract DataType getDataType()

Specified by:

getDataType in interface Selectable

isValid

public abstract boolean isValid()

Specified by:

isValid in interface ConcreteFunction

getLabel

public String getLabel()

Returns my function alias or name.

Specified by:

getLabel in interface Selectable

Overrides:

getLabel in class BaseSelectable

getAlias

public String getAlias()

Description copied from interface: Function

Returns the Alias name of this function.

Specified by:

getAlias in interface Function

setAlias

public void setAlias(String alias)

Description copied from interface: Function

Set the Alias name of this function.

Specified by:

setAlias in interface Function

setName

public void setName(String name)

getName

public String getName()

Description copied from interface: Function

Returns the cannonical name of this function.

Specified by:

getName in interface Function

addArgument

public void addArgument(Selectable arg)

Description copied from interface: Function

Append the given Selectableto my argument list.

Specified by:

addArgument 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

getArgument

public Selectable getArgument(int i)

Description copied from interface: Function

Returns the Selectableat the given index.

Specified by:

getArgument in interface Function

setArgument

public void setArgument(int i,
                        Selectable arg)

Specified by:

setArgument in interface Function

toString

public String toString()

setVariableContext

public void setVariableContext(VariableContext context)

Specified by:

setVariableContext in interface Selectable

Overrides:

setVariableContext in class BaseSelectable