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jfreechart example source code file (DefaultIntervalCategoryDataset.java)

This example jfreechart source code file (DefaultIntervalCategoryDataset.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, defaultintervalcategorydataset, defaultintervalcategorydataset, illegalargumentexception, illegalargumentexception, list, null, number, number, string, the, unknown, unknownkeyexception, util

The jfreechart DefaultIntervalCategoryDataset.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.]
 *
 * -----------------------------------
 * DefaultIntervalCategoryDataset.java
 * -----------------------------------
 * (C) Copyright 2002-2008, by Jeremy Bowman and Contributors.
 *
 * Original Author:  Jeremy Bowman;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 29-Apr-2002 : Version 1, contributed by Jeremy Bowman (DG);
 * 24-Oct-2002 : Amendments for changes made to the dataset interface (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 08-Mar-2007 : Added equals() and clone() overrides (DG);
 * 25-Feb-2008 : Fix for the special case where the dataset is empty, see bug
 *               1897580 (DG)
 * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
 *               Jess Thrysoee (DG);
 *
 */

package org.jfree.data.category;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.ResourceBundle;

import org.jfree.chart.util.ResourceBundleWrapper;
import org.jfree.data.DataUtilities;
import org.jfree.data.UnknownKeyException;
import org.jfree.data.general.AbstractSeriesDataset;

/**
 * A convenience class that provides a default implementation of the
 * {@link IntervalCategoryDataset} interface.
 * <p>
 * The standard constructor accepts data in a two dimensional array where the
 * first dimension is the series, and the second dimension is the category.
 */
public class DefaultIntervalCategoryDataset extends AbstractSeriesDataset
        implements IntervalCategoryDataset {

    /** The series keys. */
    private Comparable[] seriesKeys;

    /** The category keys. */
    private Comparable[] categoryKeys;

    /** Storage for the start value data. */
    private Number[][] startData;

    /** Storage for the end value data. */
    private Number[][] endData;

    /**
     * Creates a new dataset using the specified data values and automatically
     * generated series and category keys.
     *
     * @param starts  the starting values for the intervals (<code>null
     *                not permitted).
     * @param ends  the ending values for the intervals (<code>null not
     *                permitted).
     */
    public DefaultIntervalCategoryDataset(double[][] starts, double[][] ends) {
        this(DataUtilities.createNumberArray2D(starts),
                DataUtilities.createNumberArray2D(ends));
    }

    /**
     * Constructs a dataset and populates it with data from the array.
     * <p>
     * The arrays are indexed as data[series][category].  Series and category
     * names are automatically generated - you can change them using the
     * {@link #setSeriesKeys(Comparable[])} and
     * {@link #setCategoryKeys(Comparable[])} methods.
     *
     * @param starts  the start values data.
     * @param ends  the end values data.
     */
    public DefaultIntervalCategoryDataset(Number[][] starts, Number[][] ends) {
        this(null, null, starts, ends);
    }

    /**
     * Constructs a DefaultIntervalCategoryDataset, populates it with data
     * from the arrays, and uses the supplied names for the series.
     * <p>
     * Category names are generated automatically ("Category 1", "Category 2",
     * etc).
     *
     * @param seriesNames  the series names (if <code>null, series names
     *         will be generated automatically).
     * @param starts  the start values data, indexed as data[series][category].
     * @param ends  the end values data, indexed as data[series][category].
     */
    public DefaultIntervalCategoryDataset(String[] seriesNames,
                                          Number[][] starts,
                                          Number[][] ends) {

        this(seriesNames, null, starts, ends);

    }

    /**
     * Constructs a DefaultIntervalCategoryDataset, populates it with data
     * from the arrays, and uses the supplied names for the series and the
     * supplied objects for the categories.
     *
     * @param seriesKeys  the series keys (if <code>null, series keys
     *         will be generated automatically).
     * @param categoryKeys  the category keys (if <code>null, category
     *         keys will be generated automatically).
     * @param starts  the start values data, indexed as data[series][category].
     * @param ends  the end values data, indexed as data[series][category].
     */
    public DefaultIntervalCategoryDataset(Comparable[] seriesKeys,
                                          Comparable[] categoryKeys,
                                          Number[][] starts,
                                          Number[][] ends) {

        this.startData = starts;
        this.endData = ends;

        if (starts != null && ends != null) {

            String baseName = "org.jfree.data.resources.DataPackageResources";
            ResourceBundle resources = ResourceBundleWrapper.getBundle(
                    baseName);

            int seriesCount = starts.length;
            if (seriesCount != ends.length) {
                String errMsg = "DefaultIntervalCategoryDataset: the number "
                    + "of series in the start value dataset does "
                    + "not match the number of series in the end "
                    + "value dataset.";
                throw new IllegalArgumentException(errMsg);
            }
            if (seriesCount > 0) {

                // set up the series names...
                if (seriesKeys != null) {

                    if (seriesKeys.length != seriesCount) {
                        throw new IllegalArgumentException(
                                "The number of series keys does not "
                                + "match the number of series in the data.");
                    }

                    this.seriesKeys = seriesKeys;
                }
                else {
                    String prefix = resources.getString(
                            "series.default-prefix") + " ";
                    this.seriesKeys = generateKeys(seriesCount, prefix);
                }

                // set up the category names...
                int categoryCount = starts[0].length;
                if (categoryCount != ends[0].length) {
                    String errMsg = "DefaultIntervalCategoryDataset: the "
                                + "number of categories in the start value "
                                + "dataset does not match the number of "
                                + "categories in the end value dataset.";
                    throw new IllegalArgumentException(errMsg);
                }
                if (categoryKeys != null) {
                    if (categoryKeys.length != categoryCount) {
                        throw new IllegalArgumentException(
                                "The number of category keys does not match "
                                + "the number of categories in the data.");
                    }
                    this.categoryKeys = categoryKeys;
                }
                else {
                    String prefix = resources.getString(
                            "categories.default-prefix") + " ";
                    this.categoryKeys = generateKeys(categoryCount, prefix);
                }

            }
            else {
                this.seriesKeys = new Comparable[0];
                this.categoryKeys = new Comparable[0];
            }
        }

    }

    /**
     * Returns the number of series in the dataset (possibly zero).
     *
     * @return The number of series in the dataset.
     *
     * @see #getRowCount()
     * @see #getCategoryCount()
     */
    public int getSeriesCount() {
        int result = 0;
        if (this.startData != null) {
            result = this.startData.length;
        }
        return result;
    }

    /**
     * Returns a series index.
     *
     * @param seriesKey  the series key.
     *
     * @return The series index.
     *
     * @see #getRowIndex(Comparable)
     * @see #getSeriesKey(int)
     */
    public int getSeriesIndex(Comparable seriesKey) {
        int result = -1;
        for (int i = 0; i < this.seriesKeys.length; i++) {
            if (seriesKey.equals(this.seriesKeys[i])) {
                result = i;
                break;
            }
        }
        return result;
    }

    /**
     * Returns the name of the specified series.
     *
     * @param series  the index of the required series (zero-based).
     *
     * @return The name of the specified series.
     *
     * @see #getSeriesIndex(Comparable)
     */
    public Comparable getSeriesKey(int series) {
        if ((series >= getSeriesCount()) || (series < 0)) {
            throw new IllegalArgumentException("No such series : " + series);
        }
        return this.seriesKeys[series];
    }

    /**
     * Sets the names of the series in the dataset.
     *
     * @param seriesKeys  the new keys (<code>null not permitted, the
     *         length of the array must match the number of series in the
     *         dataset).
     *
     * @see #setCategoryKeys(Comparable[])
     */
    public void setSeriesKeys(Comparable[] seriesKeys) {
        if (seriesKeys == null) {
            throw new IllegalArgumentException("Null 'seriesKeys' argument.");
        }
        if (seriesKeys.length != getSeriesCount()) {
            throw new IllegalArgumentException(
                    "The number of series keys does not match the data.");
        }
        this.seriesKeys = seriesKeys;
        fireDatasetChanged();
    }

    /**
     * Returns the number of categories in the dataset.
     *
     * @return The number of categories in the dataset.
     *
     * @see #getColumnCount()
     */
    public int getCategoryCount() {
        int result = 0;
        if (this.startData != null) {
            if (getSeriesCount() > 0) {
                result = this.startData[0].length;
            }
        }
        return result;
    }

    /**
     * Returns a list of the categories in the dataset.  This method supports
     * the {@link CategoryDataset} interface.
     *
     * @return A list of the categories in the dataset.
     *
     * @see #getRowKeys()
     */
    public List getColumnKeys() {
        // the CategoryDataset interface expects a list of categories, but
        // we've stored them in an array...
        if (this.categoryKeys == null) {
            return new ArrayList();
        }
        else {
            return Collections.unmodifiableList(Arrays.asList(
                    this.categoryKeys));
        }
    }

    /**
     * Sets the categories for the dataset.
     *
     * @param categoryKeys  an array of objects representing the categories in
     *                      the dataset.
     *
     * @see #getRowKeys()
     * @see #setSeriesKeys(Comparable[])
     */
    public void setCategoryKeys(Comparable[] categoryKeys) {
        if (categoryKeys == null) {
            throw new IllegalArgumentException("Null 'categoryKeys' argument.");
        }
        if (categoryKeys.length != getCategoryCount()) {
            throw new IllegalArgumentException(
                    "The number of categories does not match the data.");
        }
        for (int i = 0; i < categoryKeys.length; i++) {
            if (categoryKeys[i] == null) {
                throw new IllegalArgumentException(
                    "DefaultIntervalCategoryDataset.setCategoryKeys(): "
                    + "null category not permitted.");
            }
        }
        this.categoryKeys = categoryKeys;
        fireDatasetChanged();
    }

    /**
     * Returns the data value for one category in a series.
     * <P>
     * This method is part of the CategoryDataset interface.  Not particularly
     * meaningful for this class...returns the end value.
     *
     * @param series    The required series (zero based index).
     * @param category  The required category.
     *
     * @return The data value for one category in a series (null possible).
     *
     * @see #getEndValue(Comparable, Comparable)
     */
    public Number getValue(Comparable series, Comparable category) {
        int seriesIndex = getSeriesIndex(series);
        if (seriesIndex < 0) {
            throw new UnknownKeyException("Unknown 'series' key.");
        }
        int itemIndex = getColumnIndex(category);
        if (itemIndex < 0) {
            throw new UnknownKeyException("Unknown 'category' key.");
        }
        return getValue(seriesIndex, itemIndex);
    }

    /**
     * Returns the data value for one category in a series.
     * <P>
     * This method is part of the CategoryDataset interface.  Not particularly
     * meaningful for this class...returns the end value.
     *
     * @param series  the required series (zero based index).
     * @param category  the required category.
     *
     * @return The data value for one category in a series (null possible).
     *
     * @see #getEndValue(int, int)
     */
    public Number getValue(int series, int category) {
        return getEndValue(series, category);
    }

    /**
     * Returns the start data value for one category in a series.
     *
     * @param series  the required series.
     * @param category  the required category.
     *
     * @return The start data value for one category in a series
     *         (possibly <code>null).
     *
     * @see #getStartValue(int, int)
     */
    public Number getStartValue(Comparable series, Comparable category) {
        int seriesIndex = getSeriesIndex(series);
        if (seriesIndex < 0) {
            throw new UnknownKeyException("Unknown 'series' key.");
        }
        int itemIndex = getColumnIndex(category);
        if (itemIndex < 0) {
            throw new UnknownKeyException("Unknown 'category' key.");
        }
        return getStartValue(seriesIndex, itemIndex);
    }

    /**
     * Returns the start data value for one category in a series.
     *
     * @param series  the required series (zero based index).
     * @param category  the required category.
     *
     * @return The start data value for one category in a series
     *         (possibly <code>null).
     *
     * @see #getStartValue(Comparable, Comparable)
     */
    public Number getStartValue(int series, int category) {

        // check arguments...
        if ((series < 0) || (series >= getSeriesCount())) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.getValue(): "
                + "series index out of range.");
        }

        if ((category < 0) || (category >= getCategoryCount())) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.getValue(): "
                + "category index out of range.");
        }

        // fetch the value...
        return this.startData[series][category];

    }

    /**
     * Returns the end data value for one category in a series.
     *
     * @param series  the required series.
     * @param category  the required category.
     *
     * @return The end data value for one category in a series (null possible).
     *
     * @see #getEndValue(int, int)
     */
    public Number getEndValue(Comparable series, Comparable category) {
        int seriesIndex = getSeriesIndex(series);
        if (seriesIndex < 0) {
            throw new UnknownKeyException("Unknown 'series' key.");
        }
        int itemIndex = getColumnIndex(category);
        if (itemIndex < 0) {
            throw new UnknownKeyException("Unknown 'category' key.");
        }
        return getEndValue(seriesIndex, itemIndex);
    }

    /**
     * Returns the end data value for one category in a series.
     *
     * @param series  the required series (zero based index).
     * @param category  the required category.
     *
     * @return The end data value for one category in a series (null possible).
     *
     * @see #getEndValue(Comparable, Comparable)
     */
    public Number getEndValue(int series, int category) {
        if ((series < 0) || (series >= getSeriesCount())) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.getValue(): "
                + "series index out of range.");
        }

        if ((category < 0) || (category >= getCategoryCount())) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.getValue(): "
                + "category index out of range.");
        }

        return this.endData[series][category];
    }

    /**
     * Sets the start data value for one category in a series.
     *
     * @param series  the series (zero-based index).
     * @param category  the category.
     *
     * @param value The value.
     *
     * @see #setEndValue(int, Comparable, Number)
     */
    public void setStartValue(int series, Comparable category, Number value) {

        // does the series exist?
        if ((series < 0) || (series > getSeriesCount() - 1)) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.setValue: "
                + "series outside valid range.");
        }

        // is the category valid?
        int categoryIndex = getCategoryIndex(category);
        if (categoryIndex < 0) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.setValue: "
                + "unrecognised category.");
        }

        // update the data...
        this.startData[series][categoryIndex] = value;
        fireDatasetChanged();

    }

    /**
     * Sets the end data value for one category in a series.
     *
     * @param series  the series (zero-based index).
     * @param category  the category.
     *
     * @param value the value.
     *
     * @see #setStartValue(int, Comparable, Number)
     */
    public void setEndValue(int series, Comparable category, Number value) {

        // does the series exist?
        if ((series < 0) || (series > getSeriesCount() - 1)) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.setValue: "
                + "series outside valid range.");
        }

        // is the category valid?
        int categoryIndex = getCategoryIndex(category);
        if (categoryIndex < 0) {
            throw new IllegalArgumentException(
                "DefaultIntervalCategoryDataset.setValue: "
                + "unrecognised category.");
        }

        // update the data...
        this.endData[series][categoryIndex] = value;
        fireDatasetChanged();

    }

    /**
     * Returns the index for the given category.
     *
     * @param category  the category (<code>null not permitted).
     *
     * @return The index.
     *
     * @see #getColumnIndex(Comparable)
     */
    public int getCategoryIndex(Comparable category) {
        int result = -1;
        for (int i = 0; i < this.categoryKeys.length; i++) {
            if (category.equals(this.categoryKeys[i])) {
                result = i;
                break;
            }
        }
        return result;
    }

    /**
     * Generates an array of keys, by appending a space plus an integer
     * (starting with 1) to the supplied prefix string.
     *
     * @param count  the number of keys required.
     * @param prefix  the name prefix.
     *
     * @return An array of <i>prefixN with N = { 1 .. count}.
     */
    private Comparable[] generateKeys(int count, String prefix) {
        Comparable[] result = new Comparable[count];
        String name;
        for (int i = 0; i < count; i++) {
            name = prefix + (i + 1);
            result[i] = name;
        }
        return result;
    }

    /**
     * Returns a column key.
     *
     * @param column  the column index.
     *
     * @return The column key.
     *
     * @see #getRowKey(int)
     */
    public Comparable getColumnKey(int column) {
        return this.categoryKeys[column];
    }

    /**
     * Returns a column index.
     *
     * @param columnKey  the column key (<code>null not permitted).
     *
     * @return The column index.
     *
     * @see #getCategoryIndex(Comparable)
     */
    public int getColumnIndex(Comparable columnKey) {
        if (columnKey == null) {
            throw new IllegalArgumentException("Null 'columnKey' argument.");
        }
        return getCategoryIndex(columnKey);
    }

    /**
     * Returns a row index.
     *
     * @param rowKey  the row key.
     *
     * @return The row index.
     *
     * @see #getSeriesIndex(Comparable)
     */
    public int getRowIndex(Comparable rowKey) {
        return getSeriesIndex(rowKey);
    }

    /**
     * Returns a list of the series in the dataset.  This method supports the
     * {@link CategoryDataset} interface.
     *
     * @return A list of the series in the dataset.
     *
     * @see #getColumnKeys()
     */
    public List getRowKeys() {
        // the CategoryDataset interface expects a list of series, but
        // we've stored them in an array...
        if (this.seriesKeys == null) {
            return new java.util.ArrayList();
        }
        else {
            return Collections.unmodifiableList(Arrays.asList(this.seriesKeys));
        }
    }

    /**
     * Returns the name of the specified series.
     *
     * @param row  the index of the required row/series (zero-based).
     *
     * @return The name of the specified series.
     *
     * @see #getColumnKey(int)
     */
    public Comparable getRowKey(int row) {
        if ((row >= getRowCount()) || (row < 0)) {
            throw new IllegalArgumentException(
                    "The 'row' argument is out of bounds.");
        }
        return this.seriesKeys[row];
    }

    /**
     * Returns the number of categories in the dataset.  This method is part of
     * the {@link CategoryDataset} interface.
     *
     * @return The number of categories in the dataset.
     *
     * @see #getCategoryCount()
     * @see #getRowCount()
     */
    public int getColumnCount() {
        return this.categoryKeys.length;
    }

    /**
     * Returns the number of series in the dataset (possibly zero).
     *
     * @return The number of series in the dataset.
     *
     * @see #getSeriesCount()
     * @see #getColumnCount()
     */
    public int getRowCount() {
        return this.seriesKeys.length;
    }

    /**
     * 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 DefaultIntervalCategoryDataset)) {
            return false;
        }
        DefaultIntervalCategoryDataset that
                = (DefaultIntervalCategoryDataset) obj;
        if (!Arrays.equals(this.seriesKeys, that.seriesKeys)) {
            return false;
        }
        if (!Arrays.equals(this.categoryKeys, that.categoryKeys)) {
            return false;
        }
        if (!equal(this.startData, that.startData)) {
            return false;
        }
        if (!equal(this.endData, that.endData)) {
            return false;
        }
        // seem to be the same...
        return true;
    }

    /**
     * Returns a clone of this dataset.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if there is a problem cloning the
     *         dataset.
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultIntervalCategoryDataset clone
                = (DefaultIntervalCategoryDataset) super.clone();
        clone.categoryKeys = (Comparable[]) this.categoryKeys.clone();
        clone.seriesKeys = (Comparable[]) this.seriesKeys.clone();
        clone.startData = clone(this.startData);
        clone.endData = clone(this.endData);
        return clone;
    }

    /**
     * Tests two double[][] arrays for equality.
     *
     * @param array1  the first array (<code>null permitted).
     * @param array2  the second arrray (<code>null permitted).
     *
     * @return A boolean.
     */
    private static boolean equal(Number[][] array1, Number[][] array2) {
        if (array1 == null) {
            return (array2 == null);
        }
        if (array2 == null) {
            return false;
        }
        if (array1.length != array2.length) {
            return false;
        }
        for (int i = 0; i < array1.length; i++) {
            if (!Arrays.equals(array1[i], array2[i])) {
                return false;
            }
        }
        return true;
    }

    /**
     * Clones a two dimensional array of <code>Number objects.
     *
     * @param array  the array (<code>null not permitted).
     *
     * @return A clone of the array.
     */
    private static Number[][] clone(Number[][] array) {
        if (array == null) {
            throw new IllegalArgumentException("Null 'array' argument.");
        }
        Number[][] result = new Number[array.length][];
        for (int i = 0; i < array.length; i++) {
            Number[] child = array[i];
            Number[] copychild = new Number[child.length];
            System.arraycopy(child, 0, copychild, 0, child.length);
            result[i] = copychild;
        }
        return result;
    }

    /**
     * Returns a list of the series in the dataset.
     *
     * @return A list of the series in the dataset.
     *
     * @deprecated Use {@link #getRowKeys()} instead.
     */
    public List getSeries() {
        if (this.seriesKeys == null) {
            return new java.util.ArrayList();
        }
        else {
            return Collections.unmodifiableList(Arrays.asList(this.seriesKeys));
        }
    }

    /**
     * Returns a list of the categories in the dataset.
     *
     * @return A list of the categories in the dataset.
     *
     * @deprecated Use {@link #getColumnKeys()} instead.
     */
    public List getCategories() {
        return getColumnKeys();
    }

    /**
     * Returns the item count.
     *
     * @return The item count.
     *
     * @deprecated Use {@link #getCategoryCount()} instead.
     */
    public int getItemCount() {
        return this.categoryKeys.length;
    }

}

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