Package net.ontopia.persistence.query.sql

Class SQLAggregateReference

java.lang.Object

net.ontopia.persistence.query.sql.SQLAggregateReference

All Implemented Interfaces:

SQLAggregateIF

public class SQLAggregateReference
extends Object
implements SQLAggregateIF

INTERNAL: Represents a set of columns from a given table. The columns are grouped for a reason. Columns are often used as join criteria.

Field Summary

Fields

Modifier and Type	Field	Description
protected String	alias
protected SQLAggregateIF	refagg

Fields inherited from interface net.ontopia.persistence.query.sql.SQLAggregateIF

COUNT

Constructor Summary

Constructors

Constructor	Description
SQLAggregateReference(SQLAggregateIF refagg)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
String	getAlias()	INTERNAL: The column alias to use if this value is included in the projection.
SQLAggregateIF	getReference()	INTERNAL: Returns the referenced aggregate if one exists.
int	getType()	INTERNAL: Returns the aggregate function type indicated by one of the constants in the SQLAggregateIF interface.
SQLValueIF	getValue()	INTERNAL: Returns the SQLValueIF that the aggregate function is to be evaluated against.
int	hashCode()
boolean	isReference()	INTERNAL: Returns true if this aggregate is a reference to another.
void	setAlias(String alias)	INTERNAL: Sets the column alias.
void	setValue(SQLValueIF value)	INTERNAL: Sets the SQLValueIF that the aggregate function is to be evaluated against.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

alias

protected String alias

refagg

protected SQLAggregateIF refagg

Constructor Details

SQLAggregateReference

public SQLAggregateReference(SQLAggregateIF refagg)

Method Details

getType

public int getType()

Description copied from interface: SQLAggregateIF

INTERNAL: Returns the aggregate function type indicated by one of the constants in the SQLAggregateIF interface.

Specified by:

getType in interface SQLAggregateIF

getValue

public SQLValueIF getValue()

Description copied from interface: SQLAggregateIF

INTERNAL: Returns the SQLValueIF that the aggregate function is to be evaluated against.

Specified by:

getValue in interface SQLAggregateIF

setValue

public void setValue(SQLValueIF value)

Description copied from interface: SQLAggregateIF

INTERNAL: Sets the SQLValueIF that the aggregate function is to be evaluated against.

Specified by:

setValue in interface SQLAggregateIF

getAlias

public String getAlias()

Description copied from interface: SQLAggregateIF

INTERNAL: The column alias to use if this value is included in the projection. The SQL select syntax is typically like "select value as from foo".

Specified by:

getAlias in interface SQLAggregateIF

setAlias

public void setAlias(String alias)

Description copied from interface: SQLAggregateIF

INTERNAL: Sets the column alias.

Specified by:

setAlias in interface SQLAggregateIF

isReference

public boolean isReference()

Description copied from interface: SQLAggregateIF

INTERNAL: Returns true if this aggregate is a reference to another.

Specified by:

isReference in interface SQLAggregateIF

getReference

public SQLAggregateIF getReference()

Description copied from interface: SQLAggregateIF

INTERNAL: Returns the referenced aggregate if one exists.

Specified by:

getReference in interface SQLAggregateIF

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object