public File writePostScriptToFile(String projectionName, String authorName, String dataLabel)
throws IOException, AlgorithmExecutionException, TransformException {
File psFile =
FileUtilities.createTemporaryFileInDefaultTemporaryDirectory(
"geoMaps", OUTPUT_FILE_EXTENSION);
BufferedWriter out = new BufferedWriter(new FileWriter(psFile));
writeCodeHeader(out, psFile.getName());
out.write(createPostScriptUtilityDefinitions());
out.write("\n");
out.write((new PageHeader(dataLabel, pageHeightInPoints)).toPostScript() + "\n");
out.write((new PageFooter()).toPostScript() + "\n");
out.write("% Save the default clipping path so we can clip the map safely" + "\n");
out.write("gsave" + "\n");
out.write("\n");
out.write(mapDisplayer.toPostScript());
out.write("\n");
FeaturePrinter featurePrinter =
new FeaturePrinter(
featureCollection, geometryProjector, mapDisplayer, shapefileFeatureNameKey);
featurePrinter.printFeatures(out, featureColorMap);
CirclePrinter circlePrinter = new CirclePrinter(geometryProjector, mapDisplayer);
circlePrinter.printCircles(out, circles);
out.write("% Restore the default clipping path" + "\n");
out.write("grestore" + "\n");
out.write("\n");
PageMetadata pageMetadata = new PageMetadata(TITLE, subtitle);
pageMetadata.add(projectionName + " Projection");
pageMetadata.add(timestamp());
pageMetadata.add(authorName);
out.write(pageMetadata.toPostScript());
out.write("\n");
out.write(legend.toPostScript());
out.write("\n");
out.write("showpage" + "\n");
out.close();
GeoMapsAlgorithm.logger.log(LogService.LOG_INFO, "Done.");
return psFile;
}
@Override
public Data[] execute() throws AlgorithmExecutionException {
LogService logger = getLogger();
Data inputData = getInputData();
logger.log(LogService.LOG_INFO, "Creating PostScript..");
CSVWriter csvWriter = null;
try {
File barSizesFile =
FileUtilities.createTemporaryFileInDefaultTemporaryDirectory("barSizes", CSV_FILE_SUFFIX);
csvWriter = new CSVWriter(new FileWriter(barSizesFile));
String[] header = new String[] {"Record Name", "Width", "Height", "Area (Width x Height)"};
csvWriter.writeNext(header);
String postScriptCode = createPostScriptCode(csvWriter);
csvWriter.close();
File temporaryPostScriptFile =
writePostScriptCodeToTemporaryFile(postScriptCode, "horizontal-line-graph");
return formOutData(temporaryPostScriptFile, barSizesFile, inputData);
} catch (IOException e) {
String message =
String.format("An error occurred when creating %s.", getLabel(inputData.getMetadata()));
message += e.getMessage();
throw new AlgorithmExecutionException(message, e);
} catch (PostScriptCreationException e) {
String exceptionMessage =
String.format(
"An error occurred when creating the PostScript for the %s.",
getLabel(inputData.getMetadata()) + e.getMessage());
throw new AlgorithmExecutionException(exceptionMessage, e);
} finally {
if (csvWriter != null) {
try {
csvWriter.close();
} catch (IOException e) {
throw new AlgorithmExecutionException(e.getMessage(), e);
}
}
}
}