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public abstract class AbstractTableModel extends Object implements TableModel, Serializable
This abstract class provides default implementations for most of
the methods in the TableModel
interface. It takes care of
the management of listeners and provides some conveniences for generating
TableModelEvents
and dispatching them to the listeners.
To create a concrete TableModel
as a subclass of
AbstractTableModel
you need only provide implementations
for the following three methods:
public int getRowCount(); public int getColumnCount(); public Object getValueAt(int row, int column);
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans
package.
Please see {@link java.beans.XMLEncoder}.
Field Summary | |
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protected EventListenerList |
listenerList
List of listeners |
Constructor Summary | |
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|
Method Summary | |
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void |
Adds a listener to the list that's notified each time a change to the data model occurs. |
int |
findColumn(String columnName) Returns a column given its name. |
void |
fireTableCellUpdated(int row, int column) Notifies all listeners that the value of the cell at [row, column] has been updated.
|
void |
Forwards the given notification event to all TableModelListeners that registered
themselves as listeners for this table model.
|
void |
Notifies all listeners that all cell values in the table's rows may have changed. |
void |
fireTableRowsDeleted(int firstRow, int lastRow) Notifies all listeners that rows in the range [firstRow, lastRow] , inclusive, have been deleted.
|
void |
fireTableRowsInserted(int firstRow, int lastRow) Notifies all listeners that rows in the range [firstRow, lastRow] , inclusive, have been inserted.
|
void |
fireTableRowsUpdated(int firstRow, int lastRow) Notifies all listeners that rows in the range [firstRow, lastRow] , inclusive, have been updated.
|
void |
Notifies all listeners that the table's structure has changed. |
Class |
getColumnClass(int columnIndex) Returns Object.class regardless of columnIndex .
|
String |
getColumnName(int column) Returns a default name for the column using spreadsheet conventions: A, B, C, ... |
EventListener[] |
getListeners(Class listenerType) Returns an array of all the objects currently registered as FooListener s
upon this AbstractTableModel .
|
TableModelListener[] |
Returns an array of all the table model listeners registered on this model. |
boolean |
isCellEditable(int rowIndex, int columnIndex) Returns false. |
void |
Removes a listener from the list that's notified each time a change to the data model occurs. |
void |
setValueAt(Object aValue, int rowIndex, int columnIndex) This empty implementation is provided so users don't have to implement this method if their data model is not editable. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected EventListenerList listenerList
Constructor Detail |
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public AbstractTableModel()
Method Detail |
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public void addTableModelListener(TableModelListener l)
l
- the TableModelListenerpublic int findColumn(String columnName)
TableModel
interface and is not used by the
JTable
.
columnName
- string containing name of column to be locatedcolumnName
, or -1 if not foundpublic void fireTableCellUpdated(int row, int column)
[row, column]
has been updated.
row
- row of cell which has been updatedcolumn
- column of cell which has been updatedpublic void fireTableChanged(TableModelEvent e)
TableModelListeners
that registered
themselves as listeners for this table model.
e
- the event to be forwardedpublic void fireTableDataChanged()
JTable
should redraw the
table from scratch. The structure of the table (as in the order of the
columns) is assumed to be the same.
public void fireTableRowsDeleted(int firstRow, int lastRow)
[firstRow, lastRow]
, inclusive, have been deleted.
firstRow
- the first rowlastRow
- the last rowpublic void fireTableRowsInserted(int firstRow, int lastRow)
[firstRow, lastRow]
, inclusive, have been inserted.
firstRow
- the first rowlastRow
- the last rowpublic void fireTableRowsUpdated(int firstRow, int lastRow)
[firstRow, lastRow]
, inclusive, have been updated.
firstRow
- the first rowlastRow
- the last rowpublic void fireTableStructureChanged()
JTable
receives this event and its
autoCreateColumnsFromModel
flag is set it discards any table columns that it had and reallocates
default columns in the order they appear in the model. This is the
same as calling setModel(TableModel)
on the
JTable
.
public Class getColumnClass(int columnIndex)
Object.class
regardless of columnIndex
.
columnIndex
- the column being queriedpublic String getColumnName(int column)
column
cannot be found,
returns an empty string.
column
- the column being queriedcolumn
public EventListener[] getListeners(Class listenerType)
FooListener
s
upon this AbstractTableModel
.
FooListener
s are registered using the
addFooListener
method.
You can specify the listenerType
argument
with a class literal,
such as
FooListener.class
.
For example, you can query a
model m
for its table model listeners with the following code:
TableModelListener[] tmls = (TableModelListener[])(m.getListeners(TableModelListener.class));If no such listeners exist, this method returns an empty array.
listenerType
- the type of listeners requested; this parameter
should specify an interface that descends from
java.util.EventListener
FooListener
s on this component,
or an empty array if no such
listeners have been addedpublic TableModelListener[] getTableModelListeners()
TableModelListener
s
or an empty
array if no table model listeners are currently registeredpublic boolean isCellEditable(int rowIndex, int columnIndex)
rowIndex
- the row being queriedcolumnIndex
- the column being queriedpublic void removeTableModelListener(TableModelListener l)
l
- the TableModelListenerpublic void setValueAt(Object aValue, int rowIndex, int columnIndex)
aValue
- value to assign to cellrowIndex
- row of cellcolumnIndex
- column of cell
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