org.eclipse.birt.data.engine.api.querydefn
Class ComputedColumn

java.lang.Object
  org.eclipse.birt.data.engine.api.querydefn.ComputedColumn

All Implemented Interfaces:

IComputedColumn

public class ComputedColumn
extends java.lang.Object
implements IComputedColumn

Default implementation of IComputedColumn interface.

Field Summary

protected int	dataType
protected IBaseExpression	expr
protected java.lang.String	name

Constructor Summary

ComputedColumn(java.lang.String name, java.lang.String expr)

ComputedColumn(java.lang.String name, java.lang.String expr, int dataType)
Constructs a new computed column with specified name and expression

ComputedColumn(java.lang.String name, java.lang.String expr, int dataType, java.lang.String aggrFunction, IScriptExpression filter, java.util.List argument)

Method Summary

java.util.List	getAggregateArgument()
IScriptExpression	getAggregateFilter() Return the filter of this computed column iff it is an aggregation.
java.lang.String	getAggregateFunction() Return the aggregation function.
int	getDataType() Gets the data type of the computed column.
IBaseExpression	getExpression() Gets the expression of the computed column
java.lang.String	getName() Gets the name of the computed column

Methods inherited from class java.lang.Object

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

Field Detail

name

protected java.lang.String name

expr

protected IBaseExpression expr

dataType

protected int dataType

Constructor Detail

ComputedColumn

public ComputedColumn(java.lang.String name,
                      java.lang.String expr)

Parameters:

name -

expr -

ComputedColumn

public ComputedColumn(java.lang.String name,
                      java.lang.String expr,
                      int dataType)

Constructs a new computed column with specified name and expression

Parameters:

name - Name of computed column

expr - Expression of computed column

dataType - data Type of computed column

ComputedColumn

public ComputedColumn(java.lang.String name,
                      java.lang.String expr,
                      int dataType,
                      java.lang.String aggrFunction,
                      IScriptExpression filter,
                      java.util.List argument)

Parameters:

name -

expr -

dataType -

aggrFunction -

Method Detail

getName

public java.lang.String getName()

Description copied from interface: IComputedColumn

Gets the name of the computed column

Specified by:

getName in interface IComputedColumn

getExpression

public IBaseExpression getExpression()

Description copied from interface: IComputedColumn

Gets the expression of the computed column

Specified by:

getExpression in interface IComputedColumn

getDataType

public int getDataType()

Description copied from interface: IComputedColumn

Gets the data type of the computed column.

Specified by:

getDataType in interface IComputedColumn

Returns:

Data type as an integer.

getAggregateFunction

public java.lang.String getAggregateFunction()

Description copied from interface: IComputedColumn

Return the aggregation function.

Specified by:

getAggregateFunction in interface IComputedColumn

Returns:

getAggregateArgument

public java.util.List getAggregateArgument()

Specified by:

getAggregateArgument in interface IComputedColumn

getAggregateFilter

public IScriptExpression getAggregateFilter()

Description copied from interface: IComputedColumn

Return the filter of this computed column iff it is an aggregation.

Specified by:

getAggregateFilter in interface IComputedColumn

Returns: