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jfreechart example source code file (TimeSeriesTableModel.java)

This example jfreechart source code file (TimeSeriesTableModel.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

abstracttablemodel, jtable, number, object, object, period, period, regulartimeperiod, serieschangelistener, string, table, timeseries, timeseries, timeseriestablemodel, timeseriestablemodel, value

The jfreechart TimeSeriesTableModel.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * -------------------------
 * TimeSeriesTableModel.java
 * -------------------------
 * (C) Copyright 2001-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 14-Nov-2001 : Version 1 (DG);
 * 05-Apr-2002 : Removed redundant first column (DG);
 * 24-Jun-2002 : Removed unnecessary local variable (DG);
 * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 *
 */

package org.jfree.data.time;

import javax.swing.table.AbstractTableModel;

import org.jfree.data.general.SeriesChangeEvent;
import org.jfree.data.general.SeriesChangeListener;

/**
 * Wrapper around a time series to convert it to a table model for use in
 * a <code>JTable.
 */
public class TimeSeriesTableModel extends AbstractTableModel
                                  implements SeriesChangeListener {

    /** The series. */
    private TimeSeries series;

    /** A flag that controls whether the series is editable. */
    private boolean editable;

    /** The new time period. */
    private RegularTimePeriod newTimePeriod;

    /** The new value. */
    private Number newValue;

    /**
     * Default constructor.
     */
    public TimeSeriesTableModel() {
        this(new TimeSeries("Untitled"));
    }

    /**
     * Constructs a table model for a time series.
     *
     * @param series  the time series.
     */
    public TimeSeriesTableModel(TimeSeries series) {
        this(series, false);
    }

    /**
     * Creates a table model based on a time series.
     *
     * @param series  the time series.
     * @param editable  if <ocde>true, the table is editable.
     */
    public TimeSeriesTableModel(TimeSeries series, boolean editable) {
        this.series = series;
        this.series.addChangeListener(this);
        this.editable = editable;
    }

    /**
     * Returns the number of columns in the table model.  For this particular
     * model, the column count is fixed at 2.
     *
     * @return The column count.
     */
    public int getColumnCount() {
        return 2;
    }

    /**
     * Returns the column class in the table model.
     *
     * @param column    The column index.
     *
     * @return The column class in the table model.
     */
    public Class getColumnClass(int column) {
        if (column == 0) {
            return String.class;
        }
        else {
            if (column == 1) {
                return Double.class;
            }
            else {
                return null;
            }
        }
    }

    /**
     * Returns the name of a column
     *
     * @param column  the column index.
     *
     * @return The name of a column.
     */
    public String getColumnName(int column) {

        if (column == 0) {
            return "Period:";
        }
        else {
            if (column == 1) {
                return "Value:";
            }
            else {
                return null;
            }
        }

    }

    /**
     * Returns the number of rows in the table model.
     *
     * @return The row count.
     */
    public int getRowCount() {
        return this.series.getItemCount();
    }

    /**
     * Returns the data value for a cell in the table model.
     *
     * @param row  the row number.
     * @param column  the column number.
     *
     * @return The data value for a cell in the table model.
     */
    public Object getValueAt(int row, int column) {

        if (row < this.series.getItemCount()) {
            if (column == 0) {
                return this.series.getTimePeriod(row);
            }
            else {
                if (column == 1) {
                    return this.series.getValue(row);
                }
                else {
                    return null;
                }
            }
        }
        else {
            if (column == 0) {
                return this.newTimePeriod;
            }
            else {
                if (column == 1) {
                    return this.newValue;
                }
                else {
                    return null;
                }
            }
        }

    }

    /**
     * Returns a flag indicating whether or not the specified cell is editable.
     *
     * @param row  the row number.
     * @param column  the column number.
     *
     * @return <code>true if the specified cell is editable.
     */
    public boolean isCellEditable(int row, int column) {
        if (this.editable) {
            if ((column == 0) || (column == 1)) {
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }

    /**
     * Updates the time series.
     *
     * @param value  the new value.
     * @param row  the row.
     * @param column  the column.
     */
    public void setValueAt(Object value, int row, int column) {

        if (row < this.series.getItemCount()) {

            // update the time series appropriately
            if (column == 1) {
                try {
                    Double v = Double.valueOf(value.toString());
                    this.series.update(row, v);

                }
                catch (NumberFormatException nfe) {
                    System.err.println("Number format exception");
                }
            }
        }
        else {
            if (column == 0) {
                // this.series.getClass().valueOf(value.toString());
                this.newTimePeriod = null;
            }
            else if (column == 1) {
                this.newValue = Double.valueOf(value.toString());
            }
        }
    }

    /**
     * Receives notification that the time series has been changed.  Responds
     * by firing a table data change event.
     *
     * @param event  the event.
     */
    public void seriesChanged(SeriesChangeEvent event) {
        fireTableDataChanged();
    }

}

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