Executing Java Code in ODI Procedure

Hi All,
I have following java code which i need to write on ODI procedure but i am not sure which technology to chose (Jython,Sunopsis API or Java BeanShell).
I tried to execute the procedure Jyhton with <% "Java code"%> but getting the error.Any boddy can suggest where i doing wrong.
<%
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.*;
import java.util.Hashtable;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
String userName = "HXXXXXX";
String CN1=null;
String Dis_Name=null;
String Mem_of=null;
String Mail=null;
String SGID=null;
File file = new File("C:/Project/ODI/LDAPID.txt");
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "LDAP://XX.if.YYYY.net:389/OU=XYZ,DC=ZZ,DC=if,DC=XYZ,DC=COM");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, new String("" + "\\" + userName));
env.put(Context.SECURITY_CREDENTIALS, "");
DirContext ctx = null;
NamingEnumeration results = null;
ctx = new InitialDirContext(env);
SearchControls controls = new SearchControls();
controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
results = ctx.search("", "(objectclass=person)", controls);
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
   while (results.hasMore())
         SearchResult searchResult = (SearchResult) results.next();
         Attributes attributes = searchResult.getAttributes();
         Attribute attr = attributes.get("cn");
         String cn = (String) attr.get();
         CN1=(String.valueOf(attributes.get("cn")));
         Dis_Name=(String.valueOf(attributes.get("displayName")));
         SGID=(String.valueOf(attributes.get("userPrincipalName")));
         Mem_of=(String.valueOf(attributes.get("memberOf")));
         Mail=(String.valueOf(attributes.get("mail")));
         bw.write(CN1 + " || " + Dis_Name + " || " + SGID + " || " + Mail);
         bw.newLine();
bw.close();
results.close();
ctx.close();
%>
I am getting following error.
The application script threw an exception: java.lang.NullPointerException BSF info: CODE_JAVA at line: 0 column: columnNo
Please suggest what went wrong with the code.
Thanks
Regards

In Jython you don not need to declare the type so String userName = "HXXXXXX"; should simply read userName = "HXXXXXX" . Lots of your code need to be rewritten to work with Jython if you choose that as your technology.

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