boxandwhiskerrenderer.java

用于制作报表的中间件控件,纯java编写,还附带有数据库操作的源代码

        double aRadius = 0;                 // average radius

        RectangleEdge location = plot.getRangeAxisEdge();

        Number yQ1 = bawDataset.getQ1Value(row, column);
        Number yQ3 = bawDataset.getQ3Value(row, column);
        Number yMax = bawDataset.getMaxRegularValue(row, column);
        Number yMin = bawDataset.getMinRegularValue(row, column);
        Shape box = null;
        if (yQ1 != null && yQ3 != null && yMax != null && yMin != null) {

            double yyQ1 = rangeAxis.valueToJava2D(yQ1.doubleValue(), dataArea,
                    location);
            double yyQ3 = rangeAxis.valueToJava2D(yQ3.doubleValue(), dataArea, 
                    location);
            double yyMax = rangeAxis.valueToJava2D(yMax.doubleValue(), 
                    dataArea, location);
            double yyMin = rangeAxis.valueToJava2D(yMin.doubleValue(), 
                    dataArea, location);
            double xxmid = xx + state.getBarWidth() / 2.0;
            
            // draw the upper shadow...
            g2.draw(new Line2D.Double(xxmid, yyMax, xxmid, yyQ3));
            g2.draw(new Line2D.Double(xx, yyMax, xx + state.getBarWidth(), 
                    yyMax));

            // draw the lower shadow...
            g2.draw(new Line2D.Double(xxmid, yyMin, xxmid, yyQ1));
            g2.draw(new Line2D.Double(xx, yyMin, xx + state.getBarWidth(), 
                    yyMin));

            // draw the body...
            box = new Rectangle2D.Double(xx, Math.min(yyQ1, yyQ3), 
                    state.getBarWidth(), Math.abs(yyQ1 - yyQ3));
            if (this.fillBox) {
                g2.fill(box);
            }
            g2.draw(box);
  
        }
        
        g2.setPaint(this.artifactPaint);

        // draw mean - SPECIAL AIMS REQUIREMENT...
        Number yMean = bawDataset.getMeanValue(row, column);
        if (yMean != null) {
            yyAverage = rangeAxis.valueToJava2D(yMean.doubleValue(), 
                    dataArea, location);
            aRadius = state.getBarWidth() / 4;
            Ellipse2D.Double avgEllipse = new Ellipse2D.Double(xx + aRadius, 
                    yyAverage - aRadius, aRadius * 2, aRadius * 2);
            g2.fill(avgEllipse);
            g2.draw(avgEllipse);
        }

        // draw median...
        Number yMedian = bawDataset.getMedianValue(row, column);
        if (yMedian != null) {
            double yyMedian = rangeAxis.valueToJava2D(yMedian.doubleValue(), 
                    dataArea, location);
            g2.draw(new Line2D.Double(xx, yyMedian, xx + state.getBarWidth(), 
                    yyMedian));
        }
        
        // draw yOutliers...
        double maxAxisValue = rangeAxis.valueToJava2D(
                rangeAxis.getUpperBound(), dataArea, location) + aRadius;
        double minAxisValue = rangeAxis.valueToJava2D(
                rangeAxis.getLowerBound(), dataArea, location) - aRadius;

        g2.setPaint(p);

        // draw outliers
        double oRadius = state.getBarWidth() / 3;    // outlier radius
        List outliers = new ArrayList();
        OutlierListCollection outlierListCollection 
                = new OutlierListCollection();

        // From outlier array sort out which are outliers and put these into a 
        // list If there are any farouts, set the flag on the 
        // OutlierListCollection
        List yOutliers = bawDataset.getOutliers(row, column);
        if (yOutliers != null) {
            for (int i = 0; i < yOutliers.size(); i++) {
                double outlier = ((Number) yOutliers.get(i)).doubleValue();
                Number minOutlier = bawDataset.getMinOutlier(row, column);
                Number maxOutlier = bawDataset.getMaxOutlier(row, column);
                Number minRegular = bawDataset.getMinRegularValue(row, column);
                Number maxRegular = bawDataset.getMaxRegularValue(row, column);
                if (outlier > maxOutlier.doubleValue()) {
                    outlierListCollection.setHighFarOut(true);
                } 
                else if (outlier < minOutlier.doubleValue()) {
                    outlierListCollection.setLowFarOut(true);
                }
                else if (outlier > maxRegular.doubleValue()) {
                    yyOutlier = rangeAxis.valueToJava2D(outlier, dataArea, 
                            location);
                    outliers.add(new Outlier(xx + state.getBarWidth() / 2.0, 
                            yyOutlier, oRadius));
                }
                else if (outlier < minRegular.doubleValue()) {
                    yyOutlier = rangeAxis.valueToJava2D(outlier, dataArea, 
                            location);
                    outliers.add(new Outlier(xx + state.getBarWidth() / 2.0, 
                            yyOutlier, oRadius));
                }
                Collections.sort(outliers);
            }

            // Process outliers. Each outlier is either added to the 
            // appropriate outlier list or a new outlier list is made
            for (Iterator iterator = outliers.iterator(); iterator.hasNext();) {
                Outlier outlier = (Outlier) iterator.next();
                outlierListCollection.add(outlier);
            }

            for (Iterator iterator = outlierListCollection.iterator(); 
                     iterator.hasNext();) {
                OutlierList list = (OutlierList) iterator.next();
                Outlier outlier = list.getAveragedOutlier();
                Point2D point = outlier.getPoint();

                if (list.isMultiple()) {
                    drawMultipleEllipse(point, state.getBarWidth(), oRadius, 
                            g2);
                } 
                else {
                    drawEllipse(point, oRadius, g2);
                }
            }

            // draw farout indicators
            if (outlierListCollection.isHighFarOut()) {
                drawHighFarOut(aRadius / 2.0, g2, 
                        xx + state.getBarWidth() / 2.0, maxAxisValue);
            }
        
            if (outlierListCollection.isLowFarOut()) {
                drawLowFarOut(aRadius / 2.0, g2, 
                        xx + state.getBarWidth() / 2.0, minAxisValue);
            }
        }
        // collect entity and tool tip information...
        if (state.getInfo() != null && box != null) {
            EntityCollection entities = state.getEntityCollection();
            if (entities != null) {
                String tip = null;
                CategoryToolTipGenerator tipster 
                        = getToolTipGenerator(row, column);
                if (tipster != null) {
                    tip = tipster.generateToolTip(dataset, row, column);
                }
                String url = null;
                if (getItemURLGenerator(row, column) != null) {
                    url = getItemURLGenerator(row, column).generateURL(dataset,
                            row, column);
                }
                CategoryItemEntity entity = new CategoryItemEntity(box, tip, 
                        url, dataset, dataset.getRowKey(row), 
                        dataset.getColumnKey(column));
                entities.add(entity);
            }
        }

    }

    /**
     * Draws a dot to represent an outlier. 
     * 
     * @param point  the location.
     * @param oRadius  the radius.
     * @param g2  the graphics device.
     */
    private void drawEllipse(Point2D point, double oRadius, Graphics2D g2) {
        Ellipse2D dot = new Ellipse2D.Double(point.getX() + oRadius / 2, 
                point.getY(), oRadius, oRadius);
        g2.draw(dot);
    }

    /**
     * Draws two dots to represent the average value of more than one outlier.
     * 
     * @param point  the location
     * @param boxWidth  the box width.
     * @param oRadius  the radius.
     * @param g2  the graphics device.
     */
    private void drawMultipleEllipse(Point2D point, double boxWidth, 
                                     double oRadius, Graphics2D g2)  {
                                         
        Ellipse2D dot1 = new Ellipse2D.Double(point.getX() - (boxWidth / 2) 
                + oRadius, point.getY(), oRadius, oRadius);
        Ellipse2D dot2 = new Ellipse2D.Double(point.getX() + (boxWidth / 2), 
                point.getY(), oRadius, oRadius);
        g2.draw(dot1);
        g2.draw(dot2);
    }

    /**
     * Draws a triangle to indicate the presence of far-out values.
     * 
     * @param aRadius  the radius.
     * @param g2  the graphics device.
     * @param xx  the x coordinate.
     * @param m  the y coordinate.
     */
    private void drawHighFarOut(double aRadius, Graphics2D g2, double xx, 
                                double m) {
        double side = aRadius * 2;
        g2.draw(new Line2D.Double(xx - side, m + side, xx + side, m + side));
        g2.draw(new Line2D.Double(xx - side, m + side, xx, m));
        g2.draw(new Line2D.Double(xx + side, m + side, xx, m));
    }

    /**
     * Draws a triangle to indicate the presence of far-out values.
     * 
     * @param aRadius  the radius.
     * @param g2  the graphics device.
     * @param xx  the x coordinate.
     * @param m  the y coordinate.
     */
    private void drawLowFarOut(double aRadius, Graphics2D g2, double xx, 
                               double m) {
        double side = aRadius * 2;
        g2.draw(new Line2D.Double(xx - side, m - side, xx + side, m - side));
        g2.draw(new Line2D.Double(xx - side, m - side, xx, m));
        g2.draw(new Line2D.Double(xx + side, m - side, xx, m));
    }
    
    /**
     * Tests this renderer for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return <code>true</code> or <code>false</code>.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;   
        }
        if (!(obj instanceof BoxAndWhiskerRenderer)) {
            return false;   
        }
        if (!super.equals(obj)) {
            return false;
        }
        BoxAndWhiskerRenderer that = (BoxAndWhiskerRenderer) obj;
        if (!PaintUtilities.equal(this.artifactPaint, that.artifactPaint)) {
            return false;
        }
        if (!(this.fillBox == that.fillBox)) {
            return false;   
        }
        if (!(this.itemMargin == that.itemMargin)) {
            return false;   
        }
        return true;
    }
    
    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.artifactPaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream) 
            throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.artifactPaint = SerialUtilities.readPaint(stream);
    }
   
}