How to zip and encode a field as base64 with a UDF in a Message Mapping

It’s possible that in some scenarios you should compress  as a ZIP and send a document through  a WebService in base64. For achieve this we can use UDF and some libraries.

The UDF will be this:

public String invoice2zip(String invoice, String filename, Container container) throws StreamTransformationException{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ZipOutputStream zos = new ZipOutputStream(baos); 
 BASE64Encoder encoder = new BASE64Encoder();
String encoded = "";
try{
     zos.putNextEntry(new ZipEntry(filename)); 
    zos.write(invoice.getBytes());
     zos.close();
      encoded = encoder.encode( baos.toByteArray());
}catch(Exception e){
return "";
}
     return encoded;
}

We need to import a library for Base64 encoding:  sun.misc.BASE64Encoder

Mapping:

UDF:

Regards