Issue with Base64 decoding via Java code

Hi Dear friends,

I am trying to decode Base64 string present in given xml file and write the decoded file in image format in ftp folder. Sender & receiver channels are dummy and I have used the Java mapping code given in this link - http://scn.sap.com/thread/3475411 by Indrajit.

The issue is that the images in target FTP are of 0kb size, and cannot be opened via editor. It seems they are not valid ones. I tried to insert Trace into code to check whether the contents of TAG - 'ship:GraphicImage' is getting picked or not, this tag value is being decoded. The value to be decoded is getting picked properly but the output is not valid. No encoding-decofding specific settings are done in channels.

The JDK is 1.5, commons-codec-1.6.jar.Can you please suggest what may be the issue ?

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package com.sap.base64toImage;

import java.io.ByteArrayInputStream;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.apache.commons.codec.binary.Base64;

import org.w3c.dom.Document;

import org.w3c.dom.NodeList;

import com.sap.aii.mapping.api.AbstractTrace;

import com.sap.aii.mapping.api.AbstractTransformation;

import com.sap.aii.mapping.api.StreamTransformationException;

import com.sap.aii.mapping.api.TransformationInput;

import com.sap.aii.mapping.api.TransformationOutput;

public class Xmltoimagebase64 extends AbstractTransformation {

  public void transform(TransformationInput arg0, TransformationOutput arg1)

  throws StreamTransformationException {

   AbstractTrace trace = getTrace();

  try {

  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

  DocumentBuilder builder = factory.newDocumentBuilder();

  Document docOld = builder.parse(arg0.getInputPayload().getInputStream());

  NodeList details = docOld.getElementsByTagName("ship:GraphicImage");

  String data = details.item(0).getChildNodes().item(0).getNodeValue();

trace.addInfo("data value is -----" + data);

     byte[] decodedBytes = Base64.decodeBase64(data.getBytes());

trace.addInfo("decoded base64 byte array is ------" + decodedBytes);

  Document docNew = builder.parse(new ByteArrayInputStream(decodedBytes));

  TransformerFactory transformerFactory = TransformerFactory.newInstance();

  Transformer transformer = transformerFactory.newTransformer();

  DOMSource source = new DOMSource(docNew);

  StreamResult result = new StreamResult(arg1.getOutputPayload().getOutputStream());

  transformer.transform(source, result);

  } catch (Exception e) {

  e.printStackTrace();

  }

  }

}

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