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The Open Flash Chart example is a little more complicated because we have to embed the chart data in an HTML document. Whereas in the JFreeChart example, the bytes for the PNG image went to the chartOutputFilename, in this example, we write the Pentaho ChartBeans output to a String which contains the JSON that will configure the Open Flash Chart object when rendered by the browser.
Note: This example uses open-flash-chart-full-embedded-font.swf, found at http://www.ofc2dz.com/, which is a patched version of Open Flash Chart 2.
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private static void renderUsingOpenFlashChartPlugin(final String chartDocFilename,
final ChartTableModel chartTableModel) throws Exception {
final IChartPlugin plugin = ChartPluginFactory
.getInstance("org.pentaho.chart.plugin.openflashchart.OpenFlashChartPlugin");
URL chartURL = new File(chartDocFilename).toURL();
ChartDocumentContext cdc = ChartFactory.generateChart(chartURL, chartTableModel);
IOutput output = plugin.renderChartDocument(cdc, chartTableModel);
ByteArrayOutputStream tmpOut = new ByteArrayOutputStream();
output.persistChart(tmpOut, IOutput.OutputTypes.DATA_TYPE_STREAM, 400, 400);
final String ENCODING = "UTF-8";
ByteArrayInputStream in = new ByteArrayInputStream(tmpOut.toByteArray());
IOUtils.closeQuietly(tmpOut);
String openFlashChartJson = IOUtils.toString(in, ENCODING);
IOUtils.closeQuietly(in);
final String HTML_TEMPLATE = "<html>\n"
+ " <head>\n"
+ " <title>Bar Chart Using Open Flash Chart Plugin</title>\n"
+ " <script type=\"text/javascript\">window.getChartData = function() '{' return ''{0}''; '}'</script>\n"
+ " </head>\n" + " <body>\n"
+ " <object id=\"ofco00b1c87708fe11dea97da1e1ba5b86bc\" height=\"100%\" align=\"middle\" width=\"100%\" \n"
+ " codebase=\"http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0\" \n"
+ " classid=\"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000\"> \n"
+ " <param value=\"sameDomain\" name=\"allowScriptAccess\"/><param value=\"opaque\" name=\"wmode\"/> \n"
+ " <param value=\"open-flash-chart-full-embedded-font.swf?get-data=getChartData\" name=\"movie\"/> \n"
+ " <param value=\"high\" name=\"quality\"/><embed id=\"ofce00b1c87708fe11dea97da1e1ba5b86bc\" \n"
+ " height=\"100%\" align=\"middle\" width=\"100%\" \n"
+ " pluginspage=\"http://www.macromedia.com/go/getflashplayer\" type=\"application/x-shockwave-flash\" \n"
+ " allowscriptaccess=\"sameDomain\" bgcolor=\"#FFFFFF\" quality=\"high\" wmode=\"opaque\" \n"
+ " src=\"open-flash-chart-full-embedded-font.swf?get-data=getChartData\"/></object>\n" + " </body>\n" + "</html>";
String html = MessageFormat.format(HTML_TEMPLATE, new String[] { openFlashChartJson });
String chartOutputFilename = "chartoutput/"
+ chartDocFilename.substring(chartDocFilename.indexOf(File.separatorChar), chartDocFilename.indexOf('.'))
+ ".html";
FileUtils.writeStringToFile(new File(chartOutputFilename), html, "UTF-8");
}
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