org.pentaho.reporting.engine.classic.core.modules.misc.tablemodel
Class SubSetTableModel

java.lang.Object
  org.pentaho.reporting.engine.classic.core.modules.misc.tablemodel.SubSetTableModel

All Implemented Interfaces:

TableModel

public class SubSetTableModel
extends Object
implements TableModel

A TableModel that proxies an other tablemodel and cuts rows from the start and/or the end of the other tablemodel.

Author:

Thomas Morgner

Constructor Summary

SubSetTableModel(int start, int end, TableModel model)
Creates a new SubSetTableModel, the start and the end parameters define the new tablemodel row count.

Method Summary

void	addTableModelListener(TableModelListener l) Adds a listener to the list that is notified each time a change to the data model occurs.
Class	getColumnClass(int columnIndex) Returns the most specific superclass for all the cell values in the column.
int	getColumnCount() Returns the number of columns in the model.
String	getColumnName(int columnIndex) Returns the name of the column at columnIndex.
int	getRowCount() Returns the number of rows in the model.
Object	getValueAt(int rowIndex, int columnIndex) Returns the value for the cell at columnIndex and rowIndex.
boolean	isCellEditable(int rowIndex, int columnIndex) Returns true if the cell at rowIndex and columnIndex is editable.
void	removeTableModelListener(TableModelListener l) Removes a listener from the list that is notified each time a change to the data model occurs.
void	setValueAt(Object aValue, int rowIndex, int columnIndex) Sets the value in the cell at columnIndex and rowIndex to aValue.

Methods inherited from class java.lang.Object

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

Constructor Detail

SubSetTableModel

public SubSetTableModel(int start,
                        int end,
                        TableModel model)

Creates a new SubSetTableModel, the start and the end parameters define the new tablemodel row count. The parameter start must be a positive integer and denotes the number or rows removed from the start of the tablemodel. end is the number of the last translated row. Any row after end is ignored. End must be greater or equal the given start row.

Parameters:

start - the number of rows that should be removed.

end - the last row.

model - the wrapped model

Throws:

NullPointerException - if the given model is null

IllegalArgumentException - if start or end are invalid.

Method Detail

getRowCount

public int getRowCount()

Returns the number of rows in the model. A JTable uses this method to determine how many rows it should display. This method should be quick, as it is called frequently during rendering.

Specified by:

getRowCount in interface TableModel

Returns:

the number of rows in the model

See Also:

getColumnCount()

getColumnCount

public int getColumnCount()

Returns the number of columns in the model. A JTable uses this method to determine how many columns it should create and display by default.

Specified by:

getColumnCount in interface TableModel

Returns:

the number of columns in the model

See Also:

getRowCount()

getColumnName

public String getColumnName(int columnIndex)

Returns the name of the column at columnIndex. This is used to initialize the table's column header name. Note: this name does not need to be unique; two columns in a table can have the same name.

Specified by:

getColumnName in interface TableModel

Parameters:

columnIndex - the index of the column

Returns:

the name of the column

getColumnClass

public Class getColumnClass(int columnIndex)

Returns the most specific superclass for all the cell values in the column. This is used by the JTable to set up a default renderer and editor for the column.

Specified by:

getColumnClass in interface TableModel

Parameters:

columnIndex - the index of the column

Returns:

the base ancestor class of the object values in the model.

isCellEditable

public boolean isCellEditable(int rowIndex,
                              int columnIndex)

Returns true if the cell at rowIndex and columnIndex is editable. Otherwise, setValueAt on the cell will not change the value of that cell.

Specified by:

isCellEditable in interface TableModel

Parameters:

rowIndex - the row whose value to be queried

columnIndex - the column whose value to be queried

Returns:

true if the cell is editable

See Also:

setValueAt(java.lang.Object, int, int)

getValueAt

public Object getValueAt(int rowIndex,
                         int columnIndex)

Returns the value for the cell at columnIndex and rowIndex.

Specified by:

getValueAt in interface TableModel

Parameters:

rowIndex - the row whose value is to be queried

columnIndex - the column whose value is to be queried

Returns:

the value Object at the specified cell

setValueAt

public void setValueAt(Object aValue,
                       int rowIndex,
                       int columnIndex)

Sets the value in the cell at columnIndex and rowIndex to aValue.

Specified by:

setValueAt in interface TableModel

Parameters:

aValue - the new value

rowIndex - the row whose value is to be changed

columnIndex - the column whose value is to be changed

See Also:

getValueAt(int, int), isCellEditable(int, int)

addTableModelListener

public void addTableModelListener(TableModelListener l)

Adds a listener to the list that is notified each time a change to the data model occurs.

Specified by:

addTableModelListener in interface TableModel

Parameters:

l - the TableModelListener

removeTableModelListener

public void removeTableModelListener(TableModelListener l)

Removes a listener from the list that is notified each time a change to the data model occurs.

Specified by:

removeTableModelListener in interface TableModel

Parameters:

l - the TableModelListener