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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package javax.swing.table;

import javax.swing.*;

import javax.swing.event.*;

/**

 *  The <code>TableModel</code> interface specifies the methods the

 *  <code>JTable</code> will use to interrogate a tabular data model. <p>

 *

 *  The <code>JTable</code> can be set up to display any data

 *  model which implements the

 *  <code>TableModel</code> interface with a couple of lines of code:

 *  <pre>

 *      TableModel myData = new MyTableModel();

 *      JTable table = new JTable(myData);

 *  </pre><p>

 *

 * For further documentation, see <a href="https://docs.oracle.com/javase/tutorial/uiswing/components/table.html#data">Creating a Table Model</a>

 * in <em>The Java Tutorial</em>.

 *

 * @author Philip Milne

 * @see JTable

 */

public interface TableModel

{

    /**

     * Returns the number of rows in the model. A

     * <code>JTable</code> uses this method to determine how many rows it

     * should display.  This method should be quick, as it

     * is called frequently during rendering.

     *

     * @return the number of rows in the model

     * @see #getColumnCount

     */

    public int getRowCount();

    /**

     * Returns the number of columns in the model. A

     * <code>JTable</code> uses this method to determine how many columns it

     * should create and display by default.

     *

     * @return the number of columns in the model

     * @see #getRowCount

     */

    public int getColumnCount();

    /**

     * Returns the name of the column at <code>columnIndex</code>.  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.

     *

     * @param   columnIndex     the index of the column

     * @return  the name of the column

     */

    public String getColumnName(int columnIndex);

    /**

     * Returns the most specific superclass for all the cell values

     * in the column.  This is used by the <code>JTable</code> to set up a

     * default renderer and editor for the column.

     *

     * @param columnIndex  the index of the column

     * @return the common ancestor class of the object values in the model.

     */

    public Class<?> getColumnClass(int columnIndex);

    /**

     * Returns true if the cell at <code>rowIndex</code> and

     * <code>columnIndex</code>

     * is editable.  Otherwise, <code>setValueAt</code> on the cell will not

     * change the value of that cell.

     *

     * @param   rowIndex        the row whose value to be queried

     * @param   columnIndex     the column whose value to be queried

     * @return  true if the cell is editable

     * @see #setValueAt

     */

    public boolean isCellEditable(int rowIndex, int columnIndex);

    /**

     * Returns the value for the cell at <code>columnIndex</code> and

     * <code>rowIndex</code>.

     *

     * @param   rowIndex        the row whose value is to be queried

     * @param   columnIndex     the column whose value is to be queried

     * @return  the value Object at the specified cell

     */

    public Object getValueAt(int rowIndex, int columnIndex);

    /**

     * Sets the value in the cell at <code>columnIndex</code> and

     * <code>rowIndex</code> to <code>aValue</code>.

     *

     * @param   aValue           the new value

     * @param   rowIndex         the row whose value is to be changed

     * @param   columnIndex      the column whose value is to be changed

     * @see #getValueAt

     * @see #isCellEditable

     */

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

    /**

     * Adds a listener to the list that is notified each time a change

     * to the data model occurs.

     *

     * @param   l               the TableModelListener

     */

    public void addTableModelListener(TableModelListener l);

    /**

     * Removes a listener from the list that is notified each time a

     * change to the data model occurs.

     *

     * @param   l               the TableModelListener

     */

    public void removeTableModelListener(TableModelListener l);

}