defaultxyzdataset.java

java图形利器

        double[][] seriesData = (double[][]) this.seriesList.get(series);
        return seriesData[1][item];
    }

    /**
     * Returns the y-value for an item within a series.
     * 
     * @param series  the series index (in the range <code>0</code> to 
     *     <code>getSeriesCount() - 1</code>).
     * @param item  the item index (in the range <code>0</code> to 
     *     <code>getItemCount(series)</code>).
     *     
     * @return The y-value.
     * 
     * @throws ArrayIndexOutOfBoundsException if <code>series</code> is not 
     *     within the specified range.
     * @throws ArrayIndexOutOfBoundsException if <code>item</code> is not 
     *     within the specified range.
     *     
     * @see #getX(int, int)
     */
    public Number getY(int series, int item) {
        return new Double(getYValue(series, item));
    }

    /**
     * Returns the z-value for an item within a series.
     * 
     * @param series  the series index (in the range <code>0</code> to 
     *     <code>getSeriesCount() - 1</code>).
     * @param item  the item index (in the range <code>0</code> to 
     *     <code>getItemCount(series)</code>).
     *     
     * @return The z-value.
     * 
     * @throws ArrayIndexOutOfBoundsException if <code>series</code> is not 
     *     within the specified range.
     * @throws ArrayIndexOutOfBoundsException if <code>item</code> is not 
     *     within the specified range.
     * 
     * @see #getZ(int, int)
     */
    public double getZValue(int series, int item) {
        double[][] seriesData = (double[][]) this.seriesList.get(series);
        return seriesData[2][item];
    }

    /**
     * Returns the z-value for an item within a series.
     * 
     * @param series  the series index (in the range <code>0</code> to 
     *     <code>getSeriesCount() - 1</code>).
     * @param item  the item index (in the range <code>0</code> to 
     *     <code>getItemCount(series)</code>).
     *     
     * @return The z-value.
     * 
     * @throws ArrayIndexOutOfBoundsException if <code>series</code> is not 
     *     within the specified range.
     * @throws ArrayIndexOutOfBoundsException if <code>item</code> is not 
     *     within the specified range.
     *     
     * @see #getZ(int, int)
     */
    public Number getZ(int series, int item) {
        return new Double(getZValue(series, item));
    }

    /**
     * Adds a series or if a series with the same key already exists replaces
     * the data for that series, then sends a {@link DatasetChangeEvent} to 
     * all registered listeners.
     * 
     * @param seriesKey  the series key (<code>null</code> not permitted).
     * @param data  the data (must be an array with length 3, containing three 
     *     arrays of equal length, the first containing the x-values, the
     *     second containing the y-values and the third containing the 
     *     z-values). 
     */
    public void addSeries(Comparable seriesKey, double[][] data) {
        if (seriesKey == null) {
            throw new IllegalArgumentException(
                    "The 'seriesKey' cannot be null.");
        }
        if (data == null) {
            throw new IllegalArgumentException("The 'data' is null.");
        }
        if (data.length != 3) {
            throw new IllegalArgumentException(
                    "The 'data' array must have length == 3.");
        }
        if (data[0].length != data[1].length 
                || data[0].length != data[2].length) {
            throw new IllegalArgumentException("The 'data' array must contain "
                    + "three arrays all having the same length.");
        }
        int seriesIndex = indexOf(seriesKey);
        if (seriesIndex == -1) {  // add a new series
            this.seriesKeys.add(seriesKey);
            this.seriesList.add(data);
        }
        else {  // replace an existing series
            this.seriesList.remove(seriesIndex);
            this.seriesList.add(seriesIndex, data);
        }
        notifyListeners(new DatasetChangeEvent(this, this));
    }

    /**
     * Removes a series from the dataset, then sends a 
     * {@link DatasetChangeEvent} to all registered listeners.
     * 
     * @param seriesKey  the series key (<code>null</code> not permitted).
     * 
     */
    public void removeSeries(Comparable seriesKey) {
        int seriesIndex = indexOf(seriesKey);
        if (seriesIndex >= 0) {
            this.seriesKeys.remove(seriesIndex);
            this.seriesList.remove(seriesIndex);
            notifyListeners(new DatasetChangeEvent(this, this));
        }
    }
    
    /**
     * Tests this <code>DefaultXYDataset</code> instance for equality with an
     * arbitrary object.  This method returns <code>true</code> if and only if:
     * <ul>
     * <li><code>obj</code> is not <code>null</code>;</li>
     * <li><code>obj</code> is an instance of 
     *         <code>DefaultXYDataset</code>;</li>
     * <li>both datasets have the same number of series, each containing 
     *         exactly the same values.</li>
     * </ul>
     * 
     * @param obj  the object (<code>null</code> permitted).
     * 
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof DefaultXYZDataset)) {
            return false;
        }
        DefaultXYZDataset that = (DefaultXYZDataset) obj;
        if (!this.seriesKeys.equals(that.seriesKeys)) {
            return false;
        }
        for (int i = 0; i < this.seriesList.size(); i++) {
            double[][] d1 = (double[][]) this.seriesList.get(i);
            double[][] d2 = (double[][]) that.seriesList.get(i);
            double[] d1x = d1[0];
            double[] d2x = d2[0];
            if (!Arrays.equals(d1x, d2x)) {
                return false;
            }
            double[] d1y = d1[1];
            double[] d2y = d2[1];            
            if (!Arrays.equals(d1y, d2y)) {
                return false;
            }
            double[] d1z = d1[2];
            double[] d2z = d2[2];            
            if (!Arrays.equals(d1z, d2z)) {
                return false;
            }
        }
        return true;
    }
    
    /**
     * Returns a hash code for this instance.
     * 
     * @return A hash code.
     */
    public int hashCode() {
        int result;
        result = this.seriesKeys.hashCode();
        result = 29 * result + this.seriesList.hashCode();
        return result;
    }
    
    /**
     * Creates an independent copy of this dataset.
     * 
     * @return The cloned dataset.
     * 
     * @throws CloneNotSupportedException if there is a problem cloning the
     *     dataset (for instance, if a non-cloneable object is used for a
     *     series key).
     */
    public Object clone() throws CloneNotSupportedException {
        DefaultXYZDataset clone = (DefaultXYZDataset) super.clone();
        clone.seriesKeys = new java.util.ArrayList(this.seriesKeys);
        clone.seriesList = new ArrayList(this.seriesList.size());
        for (int i = 0; i < this.seriesList.size(); i++) {
            double[][] data = (double[][]) this.seriesList.get(i);
            double[] x = data[0];
            double[] y = data[1];
            double[] z = data[2];
            double[] xx = new double[x.length];
            double[] yy = new double[y.length];
            double[] zz = new double[z.length];
            System.arraycopy(x, 0, xx, 0, x.length);
            System.arraycopy(y, 0, yy, 0, y.length);
            System.arraycopy(z, 0, zz, 0, z.length);
            clone.seriesList.add(i, new double[][] {xx, yy, zz});
        }
        return clone;
    }

}