ingo@647: package de.intevation.flys.exports;
ingo@647: 
sascha@1752: import de.intevation.flys.java2d.NOPGraphics2D;
sascha@1752: 
ingo@647: import java.io.IOException;
ingo@647: import java.io.OutputStream;
ingo@647: 
sascha@1752: import java.awt.Transparency;
sascha@1752: import java.awt.Graphics2D;
sascha@1752: 
sascha@1752: import java.awt.geom.Rectangle2D;
sascha@1752: 
sascha@1752: import java.awt.image.BufferedImage;
sascha@1752: 
ingo@647: import org.w3c.dom.Document;
ingo@647: 
ingo@647: import org.apache.log4j.Logger;
ingo@647: 
ingo@647: import org.jfree.chart.ChartRenderingInfo;
ingo@647: import org.jfree.chart.JFreeChart;
ingo@647: 
ingo@647: import de.intevation.artifacts.Artifact;
ingo@647: import de.intevation.artifacts.CallContext;
ingo@647: 
felix@1945: import de.intevation.artifactdatabase.state.ArtifactAndFacet;
ingo@1979: import de.intevation.artifactdatabase.state.Settings;
ingo@695: 
ingo@647: import de.intevation.artifacts.common.utils.XMLUtils;
ingo@647: 
ingo@647: 
ingo@647: /**
ingo@647:  * An OutGenerator that generates meta information for charts. A concrete
ingo@647:  * ChartInfoGenerator need to instantiate a concrete ChartGenerator and dispatch
ingo@647:  * the methods to that instance. The only thing this ChartInfoGenerator needs
ingo@647:  * to, is to overrite the generate() method which doesn't write the chart image
ingo@647:  * to the OutputStream but a Document that contains some meta information of the
ingo@647:  * created chart.
ingo@647:  *
ingo@647:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@647:  */
ingo@647: public abstract class ChartInfoGenerator implements OutGenerator {
ingo@647: 
sascha@1752:     public static final boolean USE_NOP_GRAPHICS =
sascha@1752:         Boolean.getBoolean("info.rendering.nop.graphics");
sascha@1752: 
ingo@647:     /** The logger used in this generator.*/
ingo@647:     private static Logger logger =
ingo@647:         Logger.getLogger(ChartInfoGenerator.class);
ingo@647: 
ingo@647: 
ingo@647:     /** The OutGenerator that creates the charts.*/
ingo@653:     protected XYChartGenerator generator;
ingo@647: 
ingo@647:     protected OutputStream out;
ingo@647: 
ingo@647: 
ingo@647: 
ingo@653:     public ChartInfoGenerator(XYChartGenerator generator) {
ingo@647:         this.generator = generator;
ingo@647:     }
ingo@647: 
ingo@647: 
ingo@647:     /**
ingo@647:      * Dispatches the operation to the instantiated generator.
ingo@647:      *
ingo@647:      * @param request
ingo@647:      * @param out
ingo@647:      * @param context
ingo@647:      */
ingo@647:     public void init(Document request, OutputStream out, CallContext context) {
ingo@647:         this.out = out;
ingo@647: 
ingo@647:         generator.init(request, out, context);
ingo@647:     }
ingo@647: 
ingo@647: 
ingo@647:     /**
ingo@647:      * Dispatches the operation to the instantiated generator.
ingo@647:      *
felix@1945:      * @param master The master artifact
ingo@647:      */
ingo@647:     public void setMasterArtifact(Artifact master) {
ingo@647:         generator.setMasterArtifact(master);
ingo@647:     }
ingo@647: 
ingo@647: 
ingo@647:     /**
ingo@647:      * Dispatches the operation to the instantiated generator.
ingo@647:      */
ingo@1684:     public void doOut(
felix@1945:         ArtifactAndFacet artifactFacet,
felix@1945:         Document         attr,
felix@1945:         boolean          visible
ingo@1684:     ) {
felix@1945:         generator.doOut(artifactFacet, attr, visible);
ingo@647:     }
ingo@647: 
ingo@647: 
ingo@647:     /**
ingo@647:      * This method generates the chart using a concrete ChartGenerator but
ingo@647:      * doesn't write the chart itself to the OutputStream but a Document that
ingo@647:      * contains meta information of the created chart.
ingo@647:      */
ingo@647:     @Override
ingo@647:     public void generate()
ingo@647:     throws IOException
ingo@647:     {
ingo@647:         logger.debug("ChartInfoGenerator.generate");
ingo@647: 
ingo@653:         JFreeChart chart = generator.generateChart();
ingo@647: 
ingo@653:         int[] size = generator.getSize();
ingo@647: 
ingo@647:         ChartRenderingInfo info = new ChartRenderingInfo();
ingo@647: 
sascha@1752:         long startTime = System.currentTimeMillis();
sascha@1752: 
sascha@1752:         if (USE_NOP_GRAPHICS) {
sascha@1752:             BufferedImage image =
sascha@1752:                 new BufferedImage(size[0], size[1], Transparency.BITMASK);
sascha@1752: 
sascha@1752:             Graphics2D g2d  = image.createGraphics();
sascha@1752:             Graphics2D nop = new NOPGraphics2D(g2d);
sascha@1752: 
sascha@1752:             chart.draw(
sascha@1752:                 nop,
sascha@1752:                 new Rectangle2D.Double(0, 0, size[0], size[1]),
sascha@1752:                 null,
sascha@1752:                 info);
sascha@1752: 
sascha@1752:             nop.dispose();
sascha@1752:         }
sascha@1752:         else {
sascha@1752:             chart.createBufferedImage(
sascha@1752:                 size[0], size[1], Transparency.BITMASK, info);
sascha@1752:         }
sascha@1752: 
sascha@1752:         long stopTime = System.currentTimeMillis();
sascha@1752: 
sascha@1752:         if (logger.isDebugEnabled()) {
sascha@1752:             logger.debug("Rendering info took: " +
sascha@1752:                 (stopTime-startTime) + "ms");
sascha@1752:         }
sascha@1752: 
ingo@647: 
ingo@673:         InfoGeneratorHelper helper = new InfoGeneratorHelper(generator);
ingo@673:         Document doc = helper.createInfoDocument(chart, info);
ingo@647: 
ingo@647:         XMLUtils.toStream(doc, out);
ingo@647:     }
ingo@1979: 
ingo@1979: 
ingo@1979:     /**
ingo@1979:      * Returns an instance of <i>EmptySettings</i> currently!
ingo@1979:      *
ingo@1979:      * @return an instance of <i>EmptySettings</i>.
ingo@1979:      */
ingo@1979:     public Settings getSettings() {
ingo@1979:         return new EmptySettings();
ingo@1979:     }
ingo@647: }
ingo@647: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :