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jfreechart example source code file (DefaultMultiValueCategoryDataset.java)

This example jfreechart source code file (DefaultMultiValueCategoryDataset.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

comparable, comparable, defaultmultivaluecategorydataset, defaultmultivaluecategorydataset, double, illegalargumentexception, keyedobjects2d, list, list, null, number, number, object, range, util

The jfreechart DefaultMultiValueCategoryDataset.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.]
 *
 * -------------------------------------
 * DefaultMultiValueCategoryDataset.java
 * -------------------------------------
 * (C) Copyright 2007, 2008, by David Forslund and Contributors.
 *
 * Original Author:  David Forslund;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 08-Oct-2007 : Version 1, see patch 1780779 (DG);
 * 06-Nov-2007 : Return EMPTY_LIST not null from getValues() (DG);
 */

package org.jfree.data.statistics;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.jfree.data.KeyedObjects2D;
import org.jfree.data.Range;
import org.jfree.data.RangeInfo;
import org.jfree.data.general.AbstractDataset;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.util.PublicCloneable;

/**
 * A category dataset that defines multiple values for each item.
 *
 * @since 1.0.7
 */
public class DefaultMultiValueCategoryDataset extends AbstractDataset
        implements MultiValueCategoryDataset, RangeInfo, PublicCloneable {

    /**
     * Storage for the data.
     */
    protected KeyedObjects2D data;

    /**
     * The minimum range value.
     */
    private Number minimumRangeValue;

    /**
     * The maximum range value.
     */
    private Number maximumRangeValue;

    /**
     * The range of values.
     */
    private Range rangeBounds;

    /**
     * Creates a new dataset.
     */
    public DefaultMultiValueCategoryDataset() {
        this.data = new KeyedObjects2D();
        this.minimumRangeValue = null;
        this.maximumRangeValue = null;
        this.rangeBounds = new Range(0.0, 0.0);
    }

    /**
     * Adds a list of values to the dataset (<code>null and Double.NaN
     * items are automatically removed) and sends a {@link DatasetChangeEvent}
     * to all registered listeners.
     *
     * @param values  a list of values (<code>null not permitted).
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     */
    public void add(List values, Comparable rowKey, Comparable columnKey) {

        if (values == null) {
            throw new IllegalArgumentException("Null 'values' argument.");
        }
        if (rowKey == null) {
            throw new IllegalArgumentException("Null 'rowKey' argument.");
        }
        if (columnKey == null) {
            throw new IllegalArgumentException("Null 'columnKey' argument.");
        }
        List vlist = new ArrayList(values.size());
        Iterator iterator = values.listIterator();
        while (iterator.hasNext()) {
            Object obj = iterator.next();
            if (obj instanceof Number) {
                Number n = (Number) obj;
                double v = n.doubleValue();
                if (!Double.isNaN(v)) {
                    vlist.add(n);
                }
            }
        }
        Collections.sort(vlist);
        this.data.addObject(vlist, rowKey, columnKey);

        if (vlist.size() > 0) {
            double maxval = Double.NEGATIVE_INFINITY;
            double minval = Double.POSITIVE_INFINITY;
            for (int i = 0; i < vlist.size(); i++) {
                Number n = (Number) vlist.get(i);
                double v = n.doubleValue();
                minval = Math.min(minval, v);
                maxval = Math.max(maxval, v);
            }

            // update the cached range values...
            if (this.maximumRangeValue == null) {
                this.maximumRangeValue = new Double(maxval);
            }
            else if (maxval > this.maximumRangeValue.doubleValue()) {
                this.maximumRangeValue = new Double(maxval);
            }

            if (this.minimumRangeValue == null) {
                this.minimumRangeValue = new Double(minval);
            }
            else if (minval < this.minimumRangeValue.doubleValue()) {
                this.minimumRangeValue = new Double(minval);
            }
            this.rangeBounds = new Range(this.minimumRangeValue.doubleValue(),
                    this.maximumRangeValue.doubleValue());
        }

        fireDatasetChanged();
    }

    /**
     * Returns a list (possibly empty) of the values for the specified item.
     * The returned list should be unmodifiable.
     *
     * @param row  the row index (zero-based).
     * @param column   the column index (zero-based).
     *
     * @return The list of values.
     */
    public List getValues(int row, int column) {
        List values = (List) this.data.getObject(row, column);
        if (values != null) {
            return Collections.unmodifiableList(values);
        }
        else {
            return Collections.EMPTY_LIST;
        }
    }

    /**
     * Returns a list (possibly empty) of the values for the specified item.
     * The returned list should be unmodifiable.
     *
     * @param rowKey  the row key (<code>null not permitted).
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @return The list of values.
     */
    public List getValues(Comparable rowKey, Comparable columnKey) {
        return Collections.unmodifiableList((List) this.data.getObject(rowKey,
                columnKey));
    }

    /**
     * Returns the average value for the specified item.
     *
     * @param row  the row key.
     * @param column  the column key.
     *
     * @return The average value.
     */
    public Number getValue(Comparable row, Comparable column) {
        List l = (List) this.data.getObject(row, column);
        double average = 0.0d;
        int count = 0;
        if (l != null && l.size() > 0) {
            for (int i = 0; i < l.size(); i++) {
                Number n = (Number) l.get(i);
                average += n.doubleValue();
                count += 1;
            }
            if (count > 0) {
                average = average / count;
            }
        }
        if (count == 0) {
            return null;
        }
        return new Double(average);
    }

    /**
     * Returns the average value for the specified item.
     *
     * @param row  the row index.
     * @param column  the column index.
     *
     * @return The average value.
     */
    public Number getValue(int row, int column) {
        List l = (List) this.data.getObject(row, column);
        double average = 0.0d;
        int count = 0;
        if (l != null && l.size() > 0) {
            for (int i = 0; i < l.size(); i++) {
                Number n = (Number) l.get(i);
                average += n.doubleValue();
                count += 1;
            }
            if (count > 0) {
                average = average / count;
            }
        }
        if (count == 0) {
            return null;
        }
        return new Double(average);
    }

    /**
     * Returns the column index for a given key.
     *
     * @param key  the column key.
     *
     * @return The column index.
     */
    public int getColumnIndex(Comparable key) {
        return this.data.getColumnIndex(key);
    }

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

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

    /**
     * Returns the row index for a given key.
     *
     * @param key the row key.
     *
     * @return The row index.
     */
    public int getRowIndex(Comparable key) {
        return this.data.getRowIndex(key);
    }

    /**
     * Returns a row key.
     *
     * @param row the row index (zero-based).
     *
     * @return The row key.
     */
    public Comparable getRowKey(int row) {
        return this.data.getRowKey(row);
    }

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

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

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

    /**
     * Returns the minimum y-value in the dataset.
     *
     * @param includeInterval a flag that determines whether or not the
     *                        y-interval is taken into account.
     *
     * @return The minimum value.
     */
    public double getRangeLowerBound(boolean includeInterval) {
        double result = Double.NaN;
        if (this.minimumRangeValue != null) {
            result = this.minimumRangeValue.doubleValue();
        }
        return result;
    }

    /**
     * Returns the maximum y-value in the dataset.
     *
     * @param includeInterval a flag that determines whether or not the
     *                        y-interval is taken into account.
     *
     * @return The maximum value.
     */
    public double getRangeUpperBound(boolean includeInterval) {
        double result = Double.NaN;
        if (this.maximumRangeValue != null) {
            result = this.maximumRangeValue.doubleValue();
        }
        return result;
    }

    /**
     * Returns the range of the values in this dataset's range.
     *
     * @param includeInterval a flag that determines whether or not the
     *                        y-interval is taken into account.
     * @return The range.
     */
    public Range getRangeBounds(boolean includeInterval) {
        return this.rangeBounds;
    }

    /**
     * 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 DefaultMultiValueCategoryDataset)) {
            return false;
        }
        DefaultMultiValueCategoryDataset that
                = (DefaultMultiValueCategoryDataset) obj;
        return this.data.equals(that.data);
    }

    /**
     * Returns a clone of this instance.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if the dataset cannot be cloned.
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultMultiValueCategoryDataset clone
                = (DefaultMultiValueCategoryDataset) super.clone();
        clone.data = (KeyedObjects2D) this.data.clone();
        return clone;
    }
}

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