FOPWrapper.java

   1
   2 import java.io.*;
   3
   4 import org.xml.sax.*;
   5 import com.apple.cocoa.foundation.NSData;
   6
   7 //Avalon
   8 import org.apache.avalon.framework.ExceptionUtil;
   9 import org.apache.avalon.framework.logger.Logger;
  10 import org.apache.avalon.framework.logger.ConsoleLogger;
  11
  12 //FOP
  13 import org.apache.fop.apps.Driver;
  14 import org.apache.fop.apps.FOPException;
  15 import org.apache.fop.messaging.MessageHandler;
  16
  17 /**
  18  * This class helps calling FOP from the Obj-C side.
  19  * Based on "ExampleFO2PDF.java" from the FOP project.
  20  */
  21 public class FOPWrapper {
  22
  23     String error;
  24     boolean errorOccurred = false;
  25
  26         public NSData convert(NSData foData) throws IOException, FOPException {
  27
  28                 //Construct driver
  29                 Driver driver = new Driver();
  30
  31                 //Setup logger
  32                 Logger logger = new ConsoleLogger(ConsoleLogger.LEVEL_INFO);
  33                 driver.setLogger(logger);
  34                 MessageHandler.setScreenLogger(logger);
  35
  36                 //Setup Renderer (output format)
  37                 driver.setRenderer(Driver.RENDER_PDF);
  38
  39                 //Setup output
  40                 ByteArrayOutputStream out = new java.io.ByteArrayOutputStream();
  41                 try {
  42                         driver.setOutputStream(out);
  43
  44                         //Setup input
  45                         InputStream in = new java.io.ByteArrayInputStream(foData.bytes(0, foData.length()));
  46                         try {
  47                                 driver.setInputSource(new InputSource(in));
  48
  49                                 //Process FO
  50                                 driver.run();
  51                         } catch (Exception e) {
  52                                 error = e.toString();
  53                                 errorOccurred = true;
  54                         } finally {
  55                                 in.close();
  56                         }
  57
  58                 } finally {
  59                         out.close();
  60                 }
  61
  62                 return new NSData(out.toByteArray());
  63
  64         }
  65
  66         public String getErrorMessage() {
  67                 return error;
  68         }
  69
  70         public boolean errorOccurred() {
  71                 return errorOccurred;
  72         }
  73
  74
  75         /*
  76     public static void main(String[] args) {
  77         try {
  78             System.out.println("FOP ExampleFO2PDF\n");
  79             System.out.println("Preparing...");
  80
  81             //Setup directories
  82             File baseDir = new File(".");
  83             File outDir = new File(baseDir, "out");
  84             outDir.mkdirs();
  85
  86             //Setup input and output files
  87             File fofile = new File(baseDir, "xml/fo/helloworld.fo");
  88             File pdffile = new File(outDir, "ResultFO2PDF.pdf");
  89
  90             System.out.println("Input: XSL-FO (" + fofile + ")");
  91             System.out.println("Output: PDF (" + pdffile + ")");
  92             System.out.println();
  93             System.out.println("Transforming...");
  94
  95             FOPWrapper app = new FOPWrapper();
  96             app.convertFO2PDF(fofile, pdffile);
  97
  98             System.out.println("Success!");
  99         } catch (Exception e) {
 100             System.err.println(ExceptionUtil.printStackTrace(e));
 101             System.exit(-1);
 102         }
 103     }
 104
 105          */
 106
 107 }