Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/BedKMChartService.java @ 4357:11cf29eb002c
FacetTypes: New type: exreme_wq_curve_base (for the Stuetz-Q-Poits).
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
---|---|
date | Fri, 02 Nov 2012 11:58:11 +0100 |
parents | 58bdf95df5e4 |
children |
line wrap: on
line source
package de.intevation.flys.artifacts.services; import java.awt.Color; import java.awt.Dimension; import java.awt.Transparency; import java.awt.image.BufferedImage; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.Date; import java.util.List; import javax.imageio.ImageIO; import org.apache.log4j.Logger; import org.jfree.chart.ChartFactory; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import de.intevation.artifactdatabase.DefaultService; import de.intevation.artifacts.CallMeta; import de.intevation.artifacts.GlobalContext; import de.intevation.artifacts.Service; import de.intevation.flys.artifacts.model.minfo.BedOverview; import de.intevation.flys.artifacts.model.minfo.BedOverviewFactory; import de.intevation.flys.artifacts.resources.Resources; import de.intevation.flys.backend.SedDBSessionHolder; import de.intevation.flys.utils.KMIndex; public class BedKMChartService extends DefaultService { private static final long serialVersionUID = -4946194087923870485L; private static final Logger log = Logger.getLogger(BedKMChartService.class); public static final int DEFAULT_WIDTH = 240; public static final int DEFAULT_HEIGHT = 180; public static final String I18N_CHART_LABEL = "bed.km.chart.label"; public static final String DEFAULT_CHART_LABEL = "Measuring Points"; public static final String I18N_CHART_TITLE = "bed.km.chart.title"; public static final String DEFAULT_CHART_TITLE = "Measuring points"; public static final String I18N_KM_AXIS = "bed.km.chart.km.axis"; public static final String DEFAULT_KM_AXIS = "km"; public static final String I18N_DATE_AXIS = "bed.km.chart.date.axis"; public static final String DEFAULT_DATE_AXIS = "Date"; public static final String DEFAULT_FORMAT = "png"; // TODO: Load fancy image from resources. public static final byte [] EMPTY = { (byte)0x89, (byte)0x50, (byte)0x4e, (byte)0x47, (byte)0x0d, (byte)0x0a, (byte)0x1a, (byte)0x0a, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0d, (byte)0x49, (byte)0x48, (byte)0x44, (byte)0x52, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, (byte)0x08, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x3a, (byte)0x7e, (byte)0x9b, (byte)0x55, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, (byte)0x73, (byte)0x52, (byte)0x47, (byte)0x42, (byte)0x00, (byte)0xae, (byte)0xce, (byte)0x1c, (byte)0xe9, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x09, (byte)0x70, (byte)0x48, (byte)0x59, (byte)0x73, (byte)0x00, (byte)0x00, (byte)0x0b, (byte)0x13, (byte)0x00, (byte)0x00, (byte)0x0b, (byte)0x13, (byte)0x01, (byte)0x00, (byte)0x9a, (byte)0x9c, (byte)0x18, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x07, (byte)0x74, (byte)0x49, (byte)0x4d, (byte)0x45, (byte)0x07, (byte)0xdc, (byte)0x04, (byte)0x04, (byte)0x10, (byte)0x30, (byte)0x15, (byte)0x7d, (byte)0x77, (byte)0x36, (byte)0x0b, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x08, (byte)0x74, (byte)0x45, (byte)0x58, (byte)0x74, (byte)0x43, (byte)0x6f, (byte)0x6d, (byte)0x6d, (byte)0x65, (byte)0x6e, (byte)0x74, (byte)0x00, (byte)0xf6, (byte)0xcc, (byte)0x96, (byte)0xbf, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x0a, (byte)0x49, (byte)0x44, (byte)0x41, (byte)0x54, (byte)0x08, (byte)0xd7, (byte)0x63, (byte)0xf8, (byte)0x0f, (byte)0x00, (byte)0x01, (byte)0x01, (byte)0x01, (byte)0x00, (byte)0x1b, (byte)0xb6, (byte)0xee, (byte)0x56, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x49, (byte)0x45, (byte)0x4e, (byte)0x44, (byte)0xae, (byte)0x42, (byte)0x60, (byte)0x82 }; private static final Output empty() { return new Output(EMPTY, "image/png"); } @Override public Service.Output process( Document data, GlobalContext globalContext, CallMeta callMeta ) { log.debug("SQKMChartService.process"); SedDBSessionHolder.acquire(); try { return doProcess(data, globalContext, callMeta); } finally { SedDBSessionHolder.HOLDER.get().close(); SedDBSessionHolder.release(); } } protected Service.Output doProcess( Document input, GlobalContext globalContext, CallMeta callMeta ) { String river = getRiverName(input); Dimension extent = getExtent(input); String format = getFormat(input); if (river == null) { log.warn("River invalid."); return empty(); } BedOverview overview = BedOverviewFactory.getOverview(river); if (overview == null) { log.warn("No overview found for river '" + river + "'"); return empty(); } KMIndex<List<Date>> entries = overview.filter(BedOverview.ACCEPT); JFreeChart chart = createChart(entries, river, callMeta); return encode(chart, extent, format); } protected static Output encode( JFreeChart chart, Dimension extent, String format ) { BufferedImage image = chart.createBufferedImage( extent.width, extent.height, Transparency.BITMASK, null); ByteArrayOutputStream out = new ByteArrayOutputStream(); try { ImageIO.write(image, format, out); } catch (IOException ioe) { log.warn("writing image failed", ioe); return empty(); } return new Output(out.toByteArray(), "image/" + format); } protected static JFreeChart createChart( KMIndex<List<Date>> entries, String river, CallMeta callMeta ) { XYSeriesCollection dataset = new XYSeriesCollection(); String key = Resources.format( callMeta, I18N_CHART_LABEL, DEFAULT_CHART_LABEL, river); XYSeries series = new XYSeries(key); for (KMIndex.Entry<List<Date>> e: entries) { double km = e.getKm(); List<Date> ds = e.getValue(); for (Date d: ds) { series.add(km, d.getTime()); } } dataset.addSeries(series); String title = Resources.format( callMeta, I18N_CHART_TITLE, DEFAULT_CHART_TITLE, river); String kmAxis = Resources.getMsg( callMeta, I18N_KM_AXIS, DEFAULT_KM_AXIS); String dateAxis = Resources.getMsg( callMeta, I18N_DATE_AXIS, DEFAULT_DATE_AXIS); JFreeChart chart = ChartFactory.createXYLineChart( title, kmAxis, dateAxis, null, PlotOrientation.VERTICAL, true, true, false); XYPlot plot = (XYPlot)chart.getPlot(); DateAxis dA = new DateAxis(); plot.setRangeAxis(dA); plot.setDataset(0, dataset); chart.setBackgroundPaint(Color.white); plot.setBackgroundPaint(Color.white); plot.setDomainGridlinePaint(Color.gray); plot.setRangeGridlinePaint(Color.gray); plot.setDomainGridlinesVisible(true); plot.setRangeGridlinesVisible(true); XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer(); renderer.setSeriesPaint(0, Color.gray); renderer.setSeriesLinesVisible(0, false); renderer.setSeriesShapesVisible(0, true); renderer.setDrawOutlines(true); return chart; } protected static String getRiverName(Document input) { NodeList rivers = input.getElementsByTagName("river"); if (rivers.getLength() == 0) { return null; } String river = ((Element)rivers.item(0)).getAttribute("name"); return river.length() > 0 ? river : null; } protected static Dimension getExtent(Document input) { int width = DEFAULT_WIDTH; int height = DEFAULT_HEIGHT; NodeList extents = input.getElementsByTagName("extent"); if (extents.getLength() > 0) { Element element = (Element)extents.item(0); String w = element.getAttribute("width"); String h = element.getAttribute("height"); try { width = Math.max(1, Integer.parseInt(w)); } catch (NumberFormatException nfe) { log.warn("width '" + w + "' is not a valid."); } try { height = Math.max(1, Integer.parseInt(h)); } catch (NumberFormatException nfe) { log.warn("height '" + h + "' is not a valid"); } } return new Dimension(width, height); } protected static String getFormat(Document input) { String format = DEFAULT_FORMAT; NodeList formats = input.getElementsByTagName("format"); if (formats.getLength() > 0) { String type = ((Element)formats.item(0)).getAttribute("type"); if (type.length() > 0) { format = type; } } return format; } }