oracle bpel java embedded code

bpel_base64_encoder.java

<variables>
  <variable name="inputVariable"
            messageType="client:XSLTTransformatieProcessRequestMessage"/>
  <variable name="bestand"
            type="xsd:base64Binary"/>
</variables>
 
<bpelx:exec name="intermediairproductToBase64"
            version="1.5"
            language="java">
<![CDATA[
oracle.xml.parser.v2.XMLElement input = (oracle.xml.parser.v2.XMLElement)
    getVariableData("inputVariable",
                    "payload",
                    "/ns4:productBericht/ns4:intermediairProduct");   
oracle.xml.parser.v2.XMLDocument xmlDoc = input.getDocument();  
java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();  
try {  
       xmlDoc.print(baos );  
       java.lang.String xml_result = baos.toString();   
       oracle.soa.common.util.Base64Encoder encoder = new oracle.soa.common.util.Base64Encoder();    
       java.lang.String encoded = null;   
       encoded = encoder.encode(xml_result);  
       setVariableData("bestand",encoded); 
       baos.close(); 
} catch (java.io.IOException e) {  
    e.printStackTrace();  
} catch (Exception e) {  
    e.printStackTrace();   
}]]>
</bpelx:exec>