ingo@2237: package de.intevation.flys.exports;
ingo@2237:
ingo@2237: import org.jfree.data.Range;
ingo@2237: import org.jfree.data.xy.XYDataset;
ingo@2587: import org.jfree.data.xy.XYSeriesCollection;
ingo@2394: import org.jfree.data.time.RegularTimePeriod;
ingo@2394: import org.jfree.data.time.TimeSeriesCollection;
ingo@2394: import org.jfree.data.time.TimeSeries;
ingo@2237:
ingo@2241: import org.apache.log4j.Logger;
ingo@2241:
ingo@2394: import de.intevation.flys.jfree.Bounds;
ingo@2394: import de.intevation.flys.jfree.DoubleBounds;
ingo@2394: import de.intevation.flys.jfree.TimeBounds;
ingo@2394:
ingo@2237:
ingo@2237: /**
ingo@2237: * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@2237: */
ingo@2237: public class ChartHelper {
ingo@2237:
ingo@2241: private static final Logger logger = Logger.getLogger(ChartHelper.class);
ingo@2241:
ingo@2241:
ingo@2237: /**
ingo@2237: * This method returns the ranges of the XYDataset <i>dataset</i> as array
ingo@2237: * with [xrange, yrange].
ingo@2237: *
ingo@2237: * @param dataset The dataset which should be evaluated.
ingo@2237: *
ingo@2237: * @return an array with x and y ranges.
ingo@2237: */
ingo@2587: public static Bounds[] getBounds(XYSeriesCollection dataset) {
ingo@2241: int seriesCount = dataset != null ? dataset.getSeriesCount() : 0;
ingo@2241:
ingo@2241: if (seriesCount == 0) {
ingo@2241: logger.warn("Dataset is empty or has no Series set.");
ingo@2237: return null;
ingo@2237: }
ingo@2237:
ingo@2241: boolean foundValue = false;
ingo@2241:
ingo@2237: double minX = Double.MAX_VALUE;
ingo@2237: double maxX = -Double.MAX_VALUE;
ingo@2237: double minY = Double.MAX_VALUE;
ingo@2237: double maxY = -Double.MAX_VALUE;
ingo@2237:
ingo@2241: for (int i = 0, m = seriesCount; i < m; i++) {
ingo@2237: for (int j = 0, n = dataset.getItemCount(i); j < n; j++) {
ingo@2237: double x = dataset.getXValue(i, j);
ingo@2237: double y = dataset.getYValue(i, j);
ingo@2237:
ingo@2241: if (Double.isNaN(x) || Double.isNaN(y)) {
ingo@2241: logger.warn("Item " + j + " in Series " + i + " is broken");
ingo@2241: continue;
ingo@2241: }
ingo@2241:
ingo@2241: foundValue = true;
ingo@2241:
ingo@2237: if (x < minX) {
ingo@2237: minX = x;
ingo@2237: }
ingo@2237:
ingo@2237: if (x > maxX) {
ingo@2237: maxX = x;
ingo@2237: }
ingo@2237:
ingo@2237: if (y < minY) {
ingo@2237: minY = y;
ingo@2237: }
ingo@2237:
ingo@2237: if (y > maxY) {
ingo@2237: maxY = y;
ingo@2237: }
ingo@2237: }
ingo@2237: }
ingo@2237:
ingo@2241: return foundValue
ingo@2587: ? new Bounds[] {
ingo@2587: new DoubleBounds(minX, maxX),
ingo@2587: new DoubleBounds(minY, maxY) }
ingo@2241: : null;
ingo@2241: }
ingo@2241:
ingo@2241:
ingo@2587: public static Bounds[] getBounds(XYDataset dataset) {
ingo@2587: if (dataset instanceof XYSeriesCollection) {
ingo@2587: return getBounds((XYSeriesCollection) dataset);
ingo@2587: }
ingo@2587: else if(dataset instanceof TimeSeriesCollection) {
ingo@2587: return getBounds((TimeSeriesCollection) dataset);
ingo@2587: }
ingo@2587: else {
ingo@2587: logger.warn("Unknown XYDataset instance: " + dataset.getClass());
ingo@2587: return null;
ingo@2587: }
ingo@2587: }
ingo@2587:
ingo@2587:
ingo@2394: public static Bounds[] getBounds(TimeSeriesCollection collection) {
ingo@2394: int seriesCount = collection != null ? collection.getSeriesCount() : 0;
ingo@2394:
ingo@2394: if (seriesCount == 0) {
ingo@2394: logger.warn("TimeSeriesCollection is empty or has no Series set.");
ingo@2394: return null;
ingo@2394: }
ingo@2394:
ingo@2394: boolean foundValue = false;
ingo@2394:
ingo@2394: long lowerX = Long.MAX_VALUE;
ingo@2394: long upperX = -Long.MAX_VALUE;
ingo@2394:
ingo@2394: double lowerY = Double.MAX_VALUE;
ingo@2394: double upperY = -Double.MAX_VALUE;
ingo@2394:
ingo@2394: for (int i = 0, m = seriesCount; i < m; i++) {
ingo@2394: TimeSeries series = collection.getSeries(i);
ingo@2394:
ingo@2394: for (int j = 0, n = collection.getItemCount(i); j < n; j++) {
ingo@2394: RegularTimePeriod rtp = series.getTimePeriod(j);
ingo@2394:
ingo@2394: if (rtp == null) {
ingo@2394: continue;
ingo@2394: }
ingo@2394:
ingo@2394: foundValue = true;
ingo@2394:
ingo@2394: long start = rtp.getFirstMillisecond();
ingo@2394: long end = rtp.getLastMillisecond();
ingo@2394:
ingo@2394: if (start < lowerX) {
ingo@2394: lowerX = start;
ingo@2394: }
ingo@2394:
ingo@2394: if (end > upperX) {
ingo@2394: upperX = end;
ingo@2394: }
ingo@2394:
ingo@2394: double y = series.getValue(j).doubleValue();
ingo@2394:
ingo@2394: lowerY = Math.min(lowerY, y);
ingo@2394: upperY = Math.max(upperY, y);
ingo@2394: }
ingo@2394: }
ingo@2394:
ingo@2394: if (foundValue) {
ingo@2394: return new Bounds[] {
ingo@2394: new TimeBounds(lowerX, upperX),
ingo@2394: new DoubleBounds(lowerY, upperY)
ingo@2394: };
ingo@2394: }
ingo@2394:
ingo@2394: return null;
ingo@2394: }
ingo@2394:
ingo@2394:
ingo@2241: /**
ingo@2241: * Expand range by percent.
ingo@2241: *
ingo@2241: * @param range The range to expand.
ingo@2241: * @param percent The percentage to expand.
ingo@2241: *
ingo@2241: * @param an expanded range.
ingo@2241: */
ingo@2241: public static Range expandRange(Range range, double percent) {
ingo@2241: if (range == null) {
ingo@2241: return null;
ingo@2241: }
ingo@2241:
ingo@2241: double value = range.getLowerBound();
ingo@2241: double expand = Math.abs(value / 100 * percent);
ingo@2241:
ingo@2241: return expand != 0
ingo@2241: ? new Range(value-expand, value+expand)
ingo@2241: : new Range(-0.01 * percent, 0.01 * percent);
ingo@2237: }
ingo@2237: }
ingo@2237: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :