Get File from UCM using RIDC client

import oracle.stellent.ridc.convenience.adf.connection.AdfConnectionFacade;
import oracle.stellent.ridc.IdcClient;
import oracle.stellent.ridc.IdcClientException;
import oracle.stellent.ridc.IdcClientManager;
import oracle.stellent.ridc.IdcContext;
import oracle.stellent.ridc.model.DataBinder;
import oracle.stellent.ridc.protocol.ServiceResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import oracle.adf.share.logging.ADFLogger;

private static ADFLogger log= ADFLogger.createADFLogger(getFile.class);

public void getFile(FacesContext context,OutputStream outputStream) {

   try {
        IdcClientManager manager = new IdcClientManager();                    
        AdfConnectionFacade facade = new AdfConnectionFacade("UcmConnection");
        IdcClient idcClient = facade.getIdcClient();
                           
        IdcContext userContext;
                            
        if(adfCtx.getSessionScope().get("IdcContext")==null) {
           userContext = new IdcContext(facade.getUserCredentials("user"));
           adfCtx.getSessionScope().put("IdcContext",userContext);
          }
        else {
           userContext=(IdcContext)adfCtx.getSessionScope().get("IdcContext");
        }
        DataBinder dataBinder = idcClient.createBinder();   
        dataBinder.putLocal("IdcService", "GET_FILE");        
        dataBinder.putLocal("dID",docID);        
            
        responseString =idcClient.sendRequest(userContext, dataBinder);             
        InputStream  inputStream = responseString.getResponseStream();  

        byte[] buf = new byte[1024 * 256];
        long i = 0;
        int len;

        log.severe("Downloading File from UCM Server"); 

        while (true) {
                i++;
                len = inputStream.read(buf);
                if (len == -1) {
                    break;
               }
             outputStream.write(buf, 0, len);
            }
             outputStream.flush(); 
             inputStream.close();
             outputStream.close();
             context.responseComplete();
        } catch (IdcClientException ice) {
                 log.severe("IDC Client Exception occured. Exception message: " + ice.getMessage());
        } catch (IOException ioe) {
                 log.severe("IO Exception occurred. Unable to retrieve file. Message: " + ioe.getMessage()); 
        } catch (Exception ex) {
                 log.severe("Exception message: " + ex.getMessage() );
        }               
    }
}