home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (DefaultCategoryDataset.java)

This example jfreechart source code file (DefaultCategoryDataset.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

categorydataset, categorydataset, clonenotsupportedexception, comparable, comparable, defaultcategorydataset, defaultcategorydataset, defaultkeyedvalues2d, double, io, list, number, number, publiccloneable, serializable, util

The jfreechart DefaultCategoryDataset.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.]
 *
 * ---------------------------
 * DefaultCategoryDataset.java
 * ---------------------------
 * (C) Copyright 2002-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 21-Jan-2003 : Added standard header, and renamed DefaultCategoryDataset (DG);
 * 13-Mar-2003 : Inserted DefaultKeyedValues2DDataset into class hierarchy (DG);
 * 06-Oct-2003 : Added incrementValue() method (DG);
 * 05-Apr-2004 : Added clear() method (DG);
 * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.category (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 26-Feb-2007 : Updated API docs (DG);
 * 08-Mar-2007 : Implemented clone() (DG);
 * 09-May-2008 : Implemented PublicCloneable (DG);
 *
 */

package org.jfree.data.category;

import java.io.Serializable;
import java.util.List;

import org.jfree.data.DefaultKeyedValues2D;
import org.jfree.data.UnknownKeyException;
import org.jfree.data.general.AbstractDataset;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.util.PublicCloneable;

/**
 * A default implementation of the {@link CategoryDataset} interface.
 */
public class DefaultCategoryDataset extends AbstractDataset
        implements CategoryDataset, PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -8168173757291644622L;

    /** A storage structure for the data. */
    private DefaultKeyedValues2D data;

    /**
     * Creates a new (empty) dataset.
     */
    public DefaultCategoryDataset() {
        this.data = new DefaultKeyedValues2D();
    }

    /**
     * Returns the number of rows in the table.
     *
     * @return The row count.
     *
     * @see #getColumnCount()
     */
    public int getRowCount() {
        return this.data.getRowCount();
    }

    /**
     * Returns the number of columns in the table.
     *
     * @return The column count.
     *
     * @see #getRowCount()
     */
    public int getColumnCount() {
        return this.data.getColumnCount();
    }

    /**
     * Returns a value from the table.
     *
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     *
     * @return The value (possibly <code>null).
     *
     * @see #addValue(Number, Comparable, Comparable)
     * @see #removeValue(Comparable, Comparable)
     */
    public Number getValue(int row, int column) {
        return this.data.getValue(row, column);
    }

    /**
     * Returns the key for the specified row.
     *
     * @param row  the row index (zero-based).
     *
     * @return The row key.
     *
     * @see #getRowIndex(Comparable)
     * @see #getRowKeys()
     * @see #getColumnKey(int)
     */
    public Comparable getRowKey(int row) {
        return this.data.getRowKey(row);
    }

    /**
     * Returns the row index for a given key.
     *
     * @param key  the row key (<code>null not permitted).
     *
     * @return The row index.
     *
     * @see #getRowKey(int)
     */
    public int getRowIndex(Comparable key) {
        // defer null argument check
        return this.data.getRowIndex(key);
    }

    /**
     * Returns the row keys.
     *
     * @return The keys.
     *
     * @see #getRowKey(int)
     */
    public List getRowKeys() {
        return this.data.getRowKeys();
    }

    /**
     * Returns a column key.
     *
     * @param column  the column index (zero-based).
     *
     * @return The column key.
     *
     * @see #getColumnIndex(Comparable)
     */
    public Comparable getColumnKey(int column) {
        return this.data.getColumnKey(column);
    }

    /**
     * Returns the column index for a given key.
     *
     * @param key  the column key (<code>null not permitted).
     *
     * @return The column index.
     *
     * @see #getColumnKey(int)
     */
    public int getColumnIndex(Comparable key) {
        // defer null argument check
        return this.data.getColumnIndex(key);
    }

    /**
     * Returns the column keys.
     *
     * @return The keys.
     *
     * @see #getColumnKey(int)
     */
    public List getColumnKeys() {
        return this.data.getColumnKeys();
    }

    /**
     * Returns the value for a pair of keys.
     *
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @return The value (possibly <code>null).
     *
     * @throws UnknownKeyException if either key is not defined in the dataset.
     *
     * @see #addValue(Number, Comparable, Comparable)
     */
    public Number getValue(Comparable rowKey, Comparable columnKey) {
        return this.data.getValue(rowKey, columnKey);
    }

    /**
     * Adds a value to the table.  Performs the same function as setValue().
     *
     * @param value  the value.
     * @param rowKey  the row key.
     * @param columnKey  the column key.
     *
     * @see #getValue(Comparable, Comparable)
     * @see #removeValue(Comparable, Comparable)
     */
    public void addValue(Number value, Comparable rowKey,
                         Comparable columnKey) {
        this.data.addValue(value, rowKey, columnKey);
        fireDatasetChanged();
    }

    /**
     * Adds a value to the table.
     *
     * @param value  the value.
     * @param rowKey  the row key.
     * @param columnKey  the column key.
     *
     * @see #getValue(Comparable, Comparable)
     */
    public void addValue(double value, Comparable rowKey,
                         Comparable columnKey) {
        addValue(new Double(value), rowKey, columnKey);
    }

    /**
     * Adds or updates a value in the table and sends a
     * {@link DatasetChangeEvent} to all registered listeners.
     *
     * @param value  the value (<code>null permitted).
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @see #getValue(Comparable, Comparable)
     */
    public void setValue(Number value, Comparable rowKey,
                         Comparable columnKey) {
        this.data.setValue(value, rowKey, columnKey);
        fireDatasetChanged();
    }

    /**
     * Adds or updates a value in the table and sends a
     * {@link DatasetChangeEvent} to all registered listeners.
     *
     * @param value  the value.
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @see #getValue(Comparable, Comparable)
     */
    public void setValue(double value, Comparable rowKey,
                         Comparable columnKey) {
        setValue(new Double(value), rowKey, columnKey);
    }

    /**
     * Adds the specified value to an existing value in the dataset (if the
     * existing value is <code>null, it is treated as if it were 0.0).
     *
     * @param value  the value.
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @throws UnknownKeyException if either key is not defined in the dataset.
     */
    public void incrementValue(double value,
                               Comparable rowKey,
                               Comparable columnKey) {
        double existing = 0.0;
        Number n = getValue(rowKey, columnKey);
        if (n != null) {
            existing = n.doubleValue();
        }
        setValue(existing + value, rowKey, columnKey);
    }

    /**
     * Removes a value from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param rowKey  the row key.
     * @param columnKey  the column key.
     *
     * @see #addValue(Number, Comparable, Comparable)
     */
    public void removeValue(Comparable rowKey, Comparable columnKey) {
        this.data.removeValue(rowKey, columnKey);
        fireDatasetChanged();
    }

    /**
     * Removes a row from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param rowIndex  the row index.
     *
     * @see #removeColumn(int)
     */
    public void removeRow(int rowIndex) {
        this.data.removeRow(rowIndex);
        fireDatasetChanged();
    }

    /**
     * Removes a row from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param rowKey  the row key.
     *
     * @see #removeColumn(Comparable)
     */
    public void removeRow(Comparable rowKey) {
        this.data.removeRow(rowKey);
        fireDatasetChanged();
    }

    /**
     * Removes a column from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param columnIndex  the column index.
     *
     * @see #removeRow(int)
     */
    public void removeColumn(int columnIndex) {
        this.data.removeColumn(columnIndex);
        fireDatasetChanged();
    }

    /**
     * Removes a column from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @see #removeRow(Comparable)
     *
     * @throws UnknownKeyException if <code>columnKey is not defined
     *         in the dataset.
     */
    public void removeColumn(Comparable columnKey) {
        this.data.removeColumn(columnKey);
        fireDatasetChanged();
    }

    /**
     * Clears all data from the dataset and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     */
    public void clear() {
        this.data.clear();
        fireDatasetChanged();
    }

    /**
     * Tests this dataset for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CategoryDataset)) {
            return false;
        }
        CategoryDataset that = (CategoryDataset) obj;
        if (!getRowKeys().equals(that.getRowKeys())) {
            return false;
        }
        if (!getColumnKeys().equals(that.getColumnKeys())) {
            return false;
        }
        int rowCount = getRowCount();
        int colCount = getColumnCount();
        for (int r = 0; r < rowCount; r++) {
            for (int c = 0; c < colCount; c++) {
                Number v1 = getValue(r, c);
                Number v2 = that.getValue(r, c);
                if (v1 == null) {
                    if (v2 != null) {
                        return false;
                    }
                }
                else if (!v1.equals(v2)) {
                    return false;
                }
            }
        }
        return true;
    }

    /**
     * Returns a hash code for the dataset.
     *
     * @return A hash code.
     */
    public int hashCode() {
        return this.data.hashCode();
    }

    /**
     * Returns a clone of the dataset.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if there is a problem cloning the
     *         dataset.
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultCategoryDataset clone = (DefaultCategoryDataset) super.clone();
        clone.data = (DefaultKeyedValues2D) this.data.clone();
        return clone;
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart DefaultCategoryDataset.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.