org.pentaho.reporting.engine.classic.core
Class StaticDataRow

java.lang.Object
  org.pentaho.reporting.engine.classic.core.StaticDataRow

All Implemented Interfaces:

DataRow

Direct Known Subclasses:

StaticDataRow

public class StaticDataRow
extends Object
implements DataRow

This is a static datarow holding a value for each name in the datarow. This datarow does not hold dataflags and thus does not track the changes done to the data inside.

The StaticDataRow is a derived view and is used to provide a safe collection of the values of the previous datarow.

Author:

Thomas Morgner

Constructor Summary

StaticDataRow()

StaticDataRow(DataRow dataRow)

StaticDataRow(String[] names, Object[] values)

Method Summary

boolean	equals(Object o)
Object	get(String col) Returns the value of the function, expression or column using its specific name.
String[]	getColumnNames() Returns the known column names, this data-row understands.
int	hashCode()
boolean	isChanged(String name) Checks whether the value contained in the column has changed since the last advance-operation.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StaticDataRow

public StaticDataRow()

StaticDataRow

public StaticDataRow(DataRow dataRow)

StaticDataRow

public StaticDataRow(String[] names,
                     Object[] values)

Method Detail

getColumnNames

public String[] getColumnNames()

Description copied from interface: DataRow

Returns the known column names, this data-row understands. The column names may change over time but do not change while a event is processed by a function. The array returned is a copy of the internal data-storage and can be safely modified.

Specified by:

getColumnNames in interface DataRow

Returns:

the column names as array.

get

public Object get(String col)

Returns the value of the function, expression or column using its specific name. The given name is translated into a valid column number and the the column is queried. For functions and expressions, the getValue() method is called and for columns from the tablemodel the tablemodel method getValueAt(row, column) gets called.

Specified by:

get in interface DataRow

Parameters:

col - the item index.

Returns:

the value.

Throws:

IllegalStateException - if the datarow detected a deadlock.

isChanged

public boolean isChanged(String name)

Description copied from interface: DataRow

Checks whether the value contained in the column has changed since the last advance-operation.

Specified by:

isChanged in interface DataRow

Parameters:

name - the name of the column.

Returns:

true, if the value has changed, false otherwise.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object