org.axiondb
Class Literal

java.lang.Object
  org.axiondb.NamedIdentifier
      org.axiondb.Literal

All Implemented Interfaces:

Selectable, Serializable

Direct Known Subclasses:

BindVariable, Sequence

public class Literal

extends NamedIdentifier

implements Selectable

A typedliteral value.

Version:

$Revision: 1.14 $ $Date: 2004/09/09 23:47:45 $

See Also:

Serialized Form

Constructor Summary

protected	Literal(DataType type)
	Literal(Object value)
	Literal(Object value, DataType type)
	Literal(Object value, DataType type, String aliasName)

Method Summary

boolean	equals(Object otherobject) Returns true iff otherobject is a Literalwhose name are equal to mine.
Object	evaluate()
Object	evaluate(RowDecorator row)
String	getAlias() Returns the alias name of Literal, if any.
DataType	getDataType()
String	getLabel() Returns my Literal name.
String	getName() Returns the name of Literal, if any.
protected Object	getValue()
int	hashCode() Returns a hash code in keeping with the standard equals/ hashCodecontract.
void	setAlias(String name) Sets the name of this Literal.
void	setDataType(DataType type)
protected void	setValue(Object value)
void	setVariableContext(VariableContext context)
String	toString() Returns a String representation of me, suitable for debugging output.

Methods inherited from class org.axiondb.NamedIdentifier

toUpperOrNull

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Literal

public Literal(Object value)

Literal

public Literal(Object value,
               DataType type)

Literal

public Literal(Object value,
               DataType type,
               String aliasName)

Literal

protected Literal(DataType type)

Method Detail

equals

public boolean equals(Object otherobject)

Returns true iff otherobject is a Literalwhose name are equal to mine.

evaluate

public Object evaluate()
                throws AxionException

Throws:

AxionException

evaluate

public final Object evaluate(RowDecorator row)
                      throws AxionException

Specified by:

evaluate in interface Selectable

Parameters:

row - is ignored and may be null.

Throws:

AxionException

See Also:

evaluate()

getAlias

public String getAlias()

Returns the alias name of Literal, if any.

Specified by:

getAlias in interface Selectable

getDataType

public DataType getDataType()

Specified by:

getDataType in interface Selectable

getLabel

public String getLabel()

Returns my Literal name.

Specified by:

getLabel in interface Selectable

getName

public String getName()

Returns the name of Literal, if any.

Specified by:

getName in interface Selectable

hashCode

public int hashCode()

Returns a hash code in keeping with the standard equals/ hashCodecontract.

setAlias

public void setAlias(String name)

Sets the name of this Literal.

setDataType

public void setDataType(DataType type)

setVariableContext

public void setVariableContext(VariableContext context)

Specified by:

setVariableContext in interface Selectable

toString

public String toString()

Returns a String representation of me, suitable for debugging output.

getValue

protected Object getValue()
                   throws AxionException

Throws:

AxionException

setValue

protected void setValue(Object value)