Package com.j_spaces.jdbc

Class SelectColumn

java.lang.Object

com.j_spaces.jdbc.SelectColumn

All Implemented Interfaces:

Externalizable, Serializable

Direct Known Subclasses:

FunctionCallColumn, OrderColumn, UpdateColumn

public class SelectColumn
extends Object
implements Externalizable

This class represents a column in a select query.

Author:

Michael Mitrani, 2Train4, 2004

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SelectColumn()
SelectColumn(QueryTableData tableData, String columnPath)
SelectColumn(QueryTableData tableData, String columnPath, boolean isDynamic)
SelectColumn(String columnPath)
SelectColumn(String columnName, String columnAlias)

Method Summary

Modifier and Type	Method	Description
void	createColumnData(AbstractDMLQuery query)
boolean	equals(Object ob)
String	getAlias()	Gets the column's alias.
QueryColumnData	getColumnData()
int	getColumnIndexInTable()
QueryTableData	getColumnTableData()
Object	getFieldValue(IEntryPacket entry)
String	getFunctionName()
String	getName()
int	getProjectedIndex()
Object	getValue()
boolean	hasAlias()
boolean	isAggregatedFunction()
boolean	isAllColumns()
boolean	isCount()
boolean	isDynamic()
boolean	isFunction()
boolean	isInitValues()	if have default value function
boolean	isSum()
boolean	isUid()
boolean	isVisible()
void	readExternal(ObjectInput in)
void	setAlias(String alias)
void	setCount(boolean isCount)	if this is a count function
void	setFunctionName(String funcName)
void	setName(String name)
void	setProjectedIndex(int projectedIndex)
void	setSum(boolean isSum)	if this is a sum function
void	setValue(Object initValues)	if have default value function
void	setVisible(boolean flag)
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

Constructor Details

SelectColumn

public SelectColumn()

SelectColumn

public SelectColumn(String columnPath)

SelectColumn

public SelectColumn(String columnName,
 String columnAlias)

SelectColumn

public SelectColumn(QueryTableData tableData,
 String columnPath)
             throws SQLException

Throws:

SQLException

SelectColumn

public SelectColumn(QueryTableData tableData,
 String columnPath,
 boolean isDynamic)
             throws SQLException

Throws:

SQLException

Method Details

createColumnData

public void createColumnData(AbstractDMLQuery query)
                      throws SQLException

Throws:

SQLException

hasAlias

public boolean hasAlias()

getAlias

public String getAlias()

Gets the column's alias. If no alias was set the column name is returned. If the column is a function column.. the function name is returned. (COUNT(*) etc..)

Returns:

The column alias

setAlias

public void setAlias(String alias)

setName

public void setName(String name)

getName

public String getName()

isAllColumns

public boolean isAllColumns()

isCount

public boolean isCount()

Returns:

- is this a count function select. This is done this way because group by are not yet supported so if there is a count, then there is nothing else to select.

isSum

public boolean isSum()

Returns:

- is this a sum function select. This is done this way because group by are not yet supported so if there is a sum, then there is nothing else to select.

setCount

public void setCount(boolean isCount)

if this is a count function

isUid

public boolean isUid()

Returns:

- is this a UID function select.

setValue

public void setValue(Object initValues)

if have default value function

getValue

public Object getValue()

isInitValues

public boolean isInitValues()

if have default value function

setSum

public void setSum(boolean isSum)

if this is a sum function

isFunction

public boolean isFunction()

isAggregatedFunction

public boolean isAggregatedFunction()

isDynamic

public boolean isDynamic()

equals

public boolean equals(Object ob)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

setFunctionName

public void setFunctionName(String funcName)

getFunctionName

public String getFunctionName()

setVisible

public void setVisible(boolean flag)

isVisible

public boolean isVisible()

getProjectedIndex

public int getProjectedIndex()

Returns:

Returns the projectedIndex.

setProjectedIndex

public void setProjectedIndex(int projectedIndex)

Parameters:

projectedIndex - The projectedIndex to set.

getColumnTableData

public QueryTableData getColumnTableData()

getColumnIndexInTable

public int getColumnIndexInTable()

getColumnData

public QueryColumnData getColumnData()

getFieldValue

public Object getFieldValue(IEntryPacket entry)

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException