tablemap.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
// $Id: TableMap.java,v 1.1 2003/03/07 13:49:45 per_nyfelt Exp $
package org.ozoneDB.adminGui.widget;


import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
import java.util.Vector;

/**
 * In a chain of data manipulators some behaviour is common. TableMap
 * provides most of this behavour and can be subclassed by filters
 * that only need to override a handful of specific methods. TableMap
 * implements TableModel by routing all requests to its model, and
 * TableModelListener by routing all events to its listeners. Inserting
 * a TableMap which has not been subclassed into a chain of table filters
 * should have no effect.
 *
 * @author  <p align=center>Per Nyfelt
 * <br>Copyright &copy 1997-@year@ by SMB GmbH. All Rights Reserved.</p>
 * @author Ibsen Ramos-Bonilla
 *
 * @version 1.0
 *
 */
public class TableMap extends AbstractTableModel implements TableModelListener {
    /** Contains the instance to the table model. */
    protected TableModel model;
    /** Contains the number of columns in panel tables. */
    protected int columnCount;
    /** Contains the number of rows in the panel tables. */
    protected int rowCount;
    /** Contains the panel tables column names. */
    protected Vector columnNames = new Vector();
    /** Contains the panel tables data. */
    protected Vector data = new Vector();


    /**
     * This method returns a handle for the current table model.
     *
     * @return TableModel - the current model handle.
     */
    public TableModel getModel() {
        //return this;
        return this.model;
    }

    /**
     * This method sets the current table model with the designated model.
     *
     * @param model - the new table model.
     */
    public void setModel(TableModel model) {
        this.model = model;
        this.model.addTableModelListener(this);
        //this.setModel(model);
    }

    /**
     * This method returns the value in a specified cell for the current table
     * model.
     *
     * @param row - the row containing the cell to change.
     * @param column - the column containing the cell to change.
     * @return Object - the value at the specified table location.
     */
    public Object getValueAt(int row, int column) {
        return ((Object[]) data.elementAt(row))[column];
    }

    /**
     * This method sets the value in a specified cell for the current table
     * model.
     *
     * @param aValue - the value to set in the table.
     * @param aRow - the row containing the cell to change.
     * @param aColumn - the column containing the cell to change.
     */
    public void setValueAt(Object aValue, int aRow, int aColumn) {
        String value;
        try {
            value = (String) aValue;
        } catch (Exception e) {
            System.out.println("wrong format");
            e.printStackTrace();
            return;
        }

        ((Object[]) data.elementAt(aRow))[aColumn] = value;
        fireTableCellUpdated(aRow, aColumn);
    }

    /**
     * This method returns the row count in the current table model.
     *
     * @return int - the number of rows in the table.
     */
    public int getRowCount() {
        return this.data.size();
    }

    /**
     * This method returns the column count in the current table model.
     *
     * @return int - the number of columns in tne table.
     */
    public int getColumnCount() {
        return this.columnNames.size();
    }

    /**
     * This method returns the title of a column for the current table model.
     *
     * @param index - the selected column.
     * @return String - the column name.
     */
    public String getColumnName(int index) {
        return (String) columnNames.elementAt(index);
    }

    /**
     * This method returns the class of objects the given column renders.
     *
     * @param index - the selected column.
     * @return Class - the column's object type.
     */
    public Class getColumnClass(int index) {
        return ((Object[]) data.elementAt(0))[index].getClass();
    }

    /**
     * This method clears all the elements from the table.
     */
    public void clear() {
        //first clear everything in the model
        this.data.clear();
        this.rowCount = 0;
    } //-----  clear  -----//

    /**
     * This method returns a flag indicating if the cell is editable or not.
     *
     * @param row - the row containing the cell to change.
     * @param column - the column containing the cell to change.
     * @return boolean - the column's object type.
     */
    /*public boolean isCellEditable(int row, int column) {
        return this.isCellEditable(row, column);
    }*/

    /**
     * This method fires an event when the table is changed.
     *
     * @param e - table model event.
     */
    public void tableChanged(TableModelEvent e) {
        fireTableChanged(e);
    }
}