Using the barcode library

The barcode library is composed of two libraries:

A library for building a barcode image from a numeric code
A library for reading a barcode image to return the numeric code

This section depends on the library you want to use in Genero.

In our tutorial, we create two functions called buildImage and readImage.

This is the Java implementation:

buildImage( type : String, code : String) : byte[
]

try {
  Barcode builder=new Barcode();
  builder.setType(GetBarcodeBuilderType(type));
  builder.setData(data);
  builder.setAddCheckSum(true);
  ByteArrayOutputStream out=new ByteArrayOutputStream();
  if (builder.createBarcodeImage(out)) {
   byte[] ret = out.toByteArray();    
   return ret;
 } else {
   return null;
 }
} catch (Exception e) {
  return null;
}

readImage( type : String, img : byte[ ]) :
String

try {
  File f=new File("tmp.jpg"); 
  FileOutputStream stream=new FileOutputStream(f);
  stream.write(img);
  stream.close();  String[] datas = 
    BarcodeReader.read(f, GetBarcodeReaderType(type));
  if (datas==null) {
    return null;
  } else {
    String ret = datas[0];
    return ret;
  }  
} catch (Exception e) {
  return null;
}

The following two functions convert the type of a code bar to the type expected by the library:

private int GetBarcodeBuilderType(String str) {
  if (str.equals("CODABAR")) {
    return Barcode.CODABAR;
  } else if (str.equals("CODE11")) {
    return Barcode.CODE11;  
  } else if (str.equals("CODE128")) {
    return Barcode.CODE128;  
  } else if (str.equals("CODE128A")) {
    return Barcode.CODE128A;  
  } else if (str.equals("CODE128B")) {
    return Barcode.CODE128B;  
  } else if (str.equals("CODE128C")) {
    return Barcode.CODE128C;  
  } else if (str.equals("CODE2OF5")) {
    return Barcode.CODE2OF5;  
  } else if (str.equals("CODE39")) {
    return Barcode.CODE39;  
  } else if (str.equals("CODE39EX")) {
    return Barcode.CODE39EX;  
  } else if (str.equals("CODE93")) {
    return Barcode.CODE93;  
  } else if (str.equals("CODE93EX")) {
    return Barcode.CODE93EX;  
  } else if (str.equals("EAN13")) {
    return Barcode.EAN13;  
  } else if (str.equals("EAN13_2")) {
    return Barcode.EAN13_2;  
  } else if (str.equals("EAN13_5")) {
    return Barcode.EAN13_5;  
  } else if (str.equals("EAN8")) {
    return Barcode.EAN8;  
  } else if (str.equals("EAN8_2")) {
    return Barcode.EAN8_2;  
  } else if (str.equals("EAN8_5")) {
    return Barcode.EAN8_5;  
  } else if (str.equals("INTERLEAVED25")) {
    return Barcode.INTERLEAVED25;  
  } else if (str.equals("ITF14")) {
    return Barcode.ITF14;  
  } else if (str.equals("ONECODE")) {
    return Barcode.ONECODE;  
  } else if (str.equals("PLANET")) {
    return Barcode.PLANET;  
  } else if (str.equals("POSTNET")) {
    return Barcode.POSTNET;  
  } else if (str.equals("RM4SCC")) {
    return Barcode.RM4SCC;  
  } else if (str.equals("UPCA")) {
    return Barcode.UPCA;  
  } else if (str.equals("UPCE")) {
    return Barcode.UPCE;  
  } else {
    return -1;   
  }
}

private int GetBarcodeReaderType(String str) {
  if (str.equals("CODABAR")) {
    return BarcodeReader.CODABAR;  
  } else if (str.equals("CODE11")) {
    return BarcodeReader.CODE11;  
  } else if (str.equals("CODE128")) {
    return BarcodeReader.CODE128;  
  } else if (str.equals("CODE39")) {
    return BarcodeReader.CODE39;  
  } else if (str.equals("CODE39EX")) {
    return BarcodeReader.CODE39EX;  
  } else if (str.equals("CODE93")) {
    return BarcodeReader.CODE93;  
  } else if (str.equals("DATAMATRIX")) {
    return BarcodeReader.DATAMATRIX;  
  } else if (str.equals("EAN13")) {
    return BarcodeReader.EAN13;  
  } else if (str.equals("EAN8")) {
    return BarcodeReader.EAN8;  
  } else if (str.equals("INTERLEAVED25")) {
    return BarcodeReader.INTERLEAVED25;  
  } else if (str.equals("ITF14")) {
    return BarcodeReader.ITF14;  
  } else if (str.equals("ONECODE")) {
    return BarcodeReader.ONECODE;  
  } else if (str.equals("PLANET")) {
    return BarcodeReader.PLANET;  
  } else if (str.equals("POSTNET")) {
    return BarcodeReader.POSTNET;  
  } else if (str.equals("QRCODE")) {
    return BarcodeReader.QRCODE;  
  } else if (str.equals("RM4SCC")) {
    return BarcodeReader.RM4SCC;  
  } else if (str.equals("RSS14")) {
    return BarcodeReader.RSS14;  
  } else if (str.equals("RSSLIMITED")) {
    return BarcodeReader.RSSLIMITED;  
  } else if (str.equals("UPCA")) {
    return BarcodeReader.UPCA;  
  } else if (str.equals("UPCE")) {  
    return BarcodeReader.UPCE;  
  } else {
    return -1;   
  }
}