org.axiondb

Class Literal

java.lang.Object

org.axiondb.BaseSelectable

org.axiondb.Literal

All Implemented Interfaces:

java.io.Serializable, Selectable

Direct Known Subclasses:

BindVariable

public class Literal
extends BaseSelectable
implements Selectable

A typedliteral value.

Version:

$Revision: 1.16 $ $Date: 2005/12/20 18:32:40 $

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object	_value

Fields inherited from class org.axiondb.BaseSelectable

_hash

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Literal(DataType type)
	Literal(java.lang.Object value)
	Literal(java.lang.Object value, DataType type)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object otherobject) Returns true iff otherobject is a Literalwhose name are equal to mine.
java.lang.Object	evaluate()
java.lang.Object	evaluate(RowDecorator row)
DataType	getDataType()
java.lang.String	getLabel() Returns my Literal name.
java.lang.String	getName() Returns the name of Literal, if any.
int	hashCode() Returns a hash code in keeping with the standard equals/ hashCodecontract.
void	setDataType(DataType type)
java.lang.String	toString() Returns a String representation of me, suitable for debugging output.

Methods inherited from class org.axiondb.BaseSelectable

getAlias, setAlias, setName, setVariableContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axiondb.Selectable

getAlias, setVariableContext

Field Detail

_value

protected java.lang.Object _value

Constructor Detail

Literal

public Literal(java.lang.Object value)

Literal

public Literal(java.lang.Object value,
               DataType type)

Literal

protected Literal(DataType type)

Method Detail

equals

public boolean equals(java.lang.Object otherobject)

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

Overrides:

equals in class java.lang.Object

evaluate

public java.lang.Object evaluate()
                          throws AxionException

Throws:

AxionException

evaluate

public final java.lang.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()

getDataType

public DataType getDataType()

Specified by:

getDataType in interface Selectable

hashCode

public int hashCode()

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

Overrides:

hashCode in class java.lang.Object

setDataType

public void setDataType(DataType type)

getLabel

public java.lang.String getLabel()

Returns my Literal name.

Specified by:

getLabel in interface Selectable

Overrides:

getLabel in class BaseSelectable

getName

public java.lang.String getName()

Returns the name of Literal, if any.

Specified by:

getName in interface Selectable

Overrides:

getName in class BaseSelectable

toString

public java.lang.String toString()

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

Overrides:

toString in class java.lang.Object