private static List getInstanceValue(String key, ExecutionInstance instance) {
    List retVal = new ArrayList();
    BIObject obj = instance.getBIObject();
    List objPars = obj.getBiObjectParameters();

    for (int i = 0; i < objPars.size(); i++) {
      BIObjectParameter objPar = (BIObjectParameter) objPars.get(i);
      if (objPar.getParameterUrlName().equalsIgnoreCase(key)) {
        retVal.add(
            (objPar.getParameterValues() == null)
                ? ""
                : (String) objPar.getParameterValues().get(0));
        break;
      }
    }
    return retVal;
  }
  public void doService() {
    logger.debug("IN");
    try {
      // retrieving execution instance from session, no need to check if user is able to execute the
      // current document
      ExecutionInstance executionInstance =
          getContext().getExecutionInstance(ExecutionInstance.class.getName());
      BIObject obj = executionInstance.getBIObject();
      BIObjectNotesManager objectNManager = new BIObjectNotesManager();
      String execIdentifier = objectNManager.getExecutionIdentifier(obj);

      String previousNotes = this.getAttributeAsString("PREVIOUS_NOTES");
      logger.debug("Parameter [" + PREVIOUS_NOTES + "] is equal to [" + previousNotes + "]");

      String notes = this.getAttributeAsString("NOTES");
      logger.debug("Parameter [" + NOTES + "] is equal to [" + notes + "]");

      String message = this.getAttributeAsString(MESSAGE);
      logger.debug("Parameter [" + MESSAGE + "] is equal to [" + message + "]");

      String visibility = this.getAttributeAsString(VISIBILITY);
      logger.debug("Parameter [" + VISIBILITY + "] is equal to [" + visibility + "]");

      String resultStr = null;

      ObjNote objnote = null;

      SessionContainer sessCont = getSessionContainer();
      SessionContainer permCont = sessCont.getPermanentContainer();
      IEngUserProfile profile =
          (IEngUserProfile) permCont.getAttribute(IEngUserProfile.ENG_USER_PROFILE);

      String owner = (String) ((UserProfile) profile).getUserId();
      try {
        objnote =
            DAOFactory.getObjNoteDAO().getExecutionNotesByOwner(obj.getId(), execIdentifier, owner);
      } catch (Exception e) {
        logger.error(
            "Cannot load notes for document [id: "
                + obj.getId()
                + ", label: "
                + obj.getLabel()
                + ", name: "
                + obj.getName()
                + "]",
            e);
        throw new SpagoBIServiceException(SERVICE_NAME, "Cannot load notes", e);
      }
      String currentNotes = "";
      if (objnote != null) {
        logger.debug("Existing notes found with the same execution identifier");
        byte[] content = objnote.getContent();
        currentNotes = new String(content);
      }
      if (!"INSERT_NOTE".equalsIgnoreCase(MESSAGE) && !currentNotes.equals(previousNotes)) {
        logger.debug("Notes have been created by another user");
        resultStr = "conflict";
      } else {
        logger.debug("Saving notes...");
        try {
          saveNotes(execIdentifier, obj.getId(), notes, objnote, owner, visibility, profile);
          logger.debug("Notes saved");
          resultStr = "ok";
        } catch (Exception e) {
          throw new SpagoBIServiceException(SERVICE_NAME, "Error while saving notes", e);
        }
      }

      try {
        JSONObject result = new JSONObject();
        result.put("result", resultStr);
        writeBackToClient(new JSONSuccess(result));
      } catch (IOException e) {
        throw new SpagoBIServiceException(
            SERVICE_NAME, "Impossible to write back the responce to the client", e);
      } catch (JSONException e) {
        throw new SpagoBIServiceException(
            SERVICE_NAME, "Cannot serialize objects into a JSON object", e);
      }
    } finally {
      logger.debug("OUT");
    }
  }
  /**
   * Returns an url for execute the document with the engine associated. It calls relative driver.
   *
   * @param objLabel the logical label of the document (gets from the template file)
   * @param sessionContainer session object
   * @param requestSB request object
   * @return String the complete url. It use this format: <code_error>|<url>. If there is an error
   *     during the execution <code_error> is valorized and url is null, else it is null and the url
   *     is complete.
   */
  public static String getExecutionUrl(
      String objLabel, SessionContainer sessionContainer, SourceBean requestSB) {
    logger.debug("IN");

    Monitor monitor =
        MonitorFactory.start("spagobi.engines.DocumentCompositionUtils.getExecutionUrl");

    String baseUrlReturn = "";
    String urlReturn = "";

    if (objLabel == null || objLabel.equals("")) {
      logger.error("Object Label is null: cannot get engine's url.");
      return "1008|";
    }

    try {
      // get the user profile from session
      SessionContainer permSession = sessionContainer.getPermanentContainer();
      IEngUserProfile profile =
          (IEngUserProfile) permSession.getAttribute(IEngUserProfile.ENG_USER_PROFILE);
      // get the execution role
      CoreContextManager contextManager =
          new CoreContextManager(
              new SpagoBISessionContainer(sessionContainer),
              new LightNavigatorContextRetrieverStrategy(requestSB));
      ExecutionInstance instance =
          contextManager.getExecutionInstance(ExecutionInstance.class.getName());
      String executionRole = instance.getExecutionRole();
      Integer objId = DAOFactory.getBIObjectDAO().loadBIObjectByLabel(objLabel).getId();
      BIObject obj =
          DAOFactory.getBIObjectDAO().loadBIObjectForExecutionByIdAndRole(objId, executionRole);
      //			BIObject obj =
      // DAOFactory.getBIObjectDAO().loadBIObjectForExecutionByLabelAndRole(objLabel,
      // executionRole);
      //			BIObject obj = DAOFactory.getBIObjectDAO().loadBIObjectByLabel(objLabel);
      if (obj == null) {
        logger.error(
            "Cannot obtain engine url. Document with label "
                + objLabel
                + " doesn't exist into database.");
        List l = new ArrayList();
        l.add(objLabel);
        throw new EMFUserError(EMFErrorSeverity.ERROR, "1005", l, messageBundle);
      }
      //			Engine engine = obj.getEngine();

      /*ALL CONTROLS OF COMPATIBILITY ARE REMANDED TO THE SINGLE ENGINE CALLED
      // GET THE TYPE OF ENGINE (INTERNAL / EXTERNAL) AND THE SUITABLE BIOBJECT TYPES
      Domain engineType = null;
      Domain compatibleBiobjType = null;
      try {
      	engineType = DAOFactory.getDomainDAO().loadDomainById(engine.getEngineTypeId());
      	compatibleBiobjType = DAOFactory.getDomainDAO().loadDomainById(engine.getBiobjTypeId());
      } catch (EMFUserError error) {
      	logger.error("Error retrieving document's engine information", error);
      	return "1009|";
      } catch (Exception error) {
      	logger.error("Error retrieving document's engine information", error);
      	return "1009|";
      }

      String compatibleBiobjTypeCd = compatibleBiobjType.getValueCd();
      String biobjTypeCd = obj.getBiObjectTypeCode();

      // CHECK IF THE BIOBJECT IS COMPATIBLE WITH THE TYPES SUITABLE FOR THE ENGINE

      if (!compatibleBiobjTypeCd.equalsIgnoreCase(biobjTypeCd)) {
      	// the engine document type and the biobject type are not compatible
      	logger.error("Engine cannot execute input document type: " +
      			"the engine " + engine.getName() + " can execute '" + compatibleBiobjTypeCd + "' type documents " +
      			"while the input document is a '" + biobjTypeCd + "'.");
      	Vector params = new Vector();
      	params.add(engine.getName());
      	params.add(compatibleBiobjTypeCd);
      	params.add(biobjTypeCd);
      	//errorHandler.addError(new EMFUserError(EMFErrorSeverity.ERROR, 2002, params));
      	return "2002|";
      }
       */
      // IF USER CAN'T EXECUTE THE OBJECT RETURN
      // if (!ObjectsAccessVerifier.canSee(obj, profile)) return "1010|";

      // get object configuration
      DocumentCompositionConfiguration docConfig = null;
      docConfig = (DocumentCompositionConfiguration) contextManager.get("docConfig");

      Document document = null;
      // get correct document configuration
      List lstDoc = docConfig.getLabelsArray();
      boolean foundDoc = false;
      for (int i = 0; i < lstDoc.size(); i++) {
        document = (Document) docConfig.getDocument((String) lstDoc.get(i));
        if (document != null) {
          if (!obj.getLabel().equalsIgnoreCase(document.getSbiObjLabel())) continue;
          else {
            foundDoc = true;
            break;
          }
        }
      }
      if (!foundDoc) {
        List l = new ArrayList();
        l.add(obj.getLabel());
        EMFUserError userError = new EMFUserError(EMFErrorSeverity.ERROR, 1079, l);
        logger.error(
            "The object with label " + obj.getLabel() + " hasn't got a document into template");
        return "1002|";
      }

      String className = obj.getEngine().getClassName();
      if ((className == null || className.trim().equals(""))
          && (document.getSnapshot() == null || !document.getSnapshot())) {
        // external engine
        // baseUrlReturn = obj.getEngine().getUrl() + "?";
        baseUrlReturn = obj.getEngine().getUrl();
        if (baseUrlReturn.indexOf("?") < 0) baseUrlReturn += "?";
        String driverClassName = obj.getEngine().getDriverName();
        IEngineDriver aEngineDriver = (IEngineDriver) Class.forName(driverClassName).newInstance();
        Map mapPars = aEngineDriver.getParameterMap(obj, profile, executionRole);
        String id = (String) requestSB.getAttribute("vpId");
        if (id != null) {
          IViewpointDAO VPDAO = DAOFactory.getViewpointDAO();
          Viewpoint vp = VPDAO.loadViewpointByID(new Integer(id));
          String[] vpParameters = vp.getVpValueParams().split("%26");
          if (vpParameters != null) {
            for (int i = 0; i < vpParameters.length; i++) {
              String param = (String) vpParameters[i];
              String name = param.substring(0, param.indexOf("%3D"));
              String value = param.substring(param.indexOf("%3D") + 3);
              if (mapPars.get(name) != null) {
                mapPars.remove(name);
                mapPars.put(name, value);
              } else mapPars.put(name, value);
            }
          }
        }
        mapPars.put(SpagoBIConstants.SBI_CONTEXT, GeneralUtilities.getSpagoBiContext());
        mapPars.put(SpagoBIConstants.SBI_HOST, GeneralUtilities.getSpagoBiHost());
        UUIDGenerator uuidGen = UUIDGenerator.getInstance();
        UUID uuidObj = uuidGen.generateRandomBasedUUID();
        String executionId = uuidObj.toString();
        executionId = executionId.replaceAll("-", "");
        mapPars.put("SBI_EXECUTION_ID", executionId);
        mapPars.put("EXECUTION_CONTEXT", "DOCUMENT_COMPOSITION");
        // Auditing
        AuditManager auditManager = AuditManager.getInstance();
        Integer executionAuditId =
            auditManager.insertAudit(
                instance.getBIObject(),
                null,
                profile,
                executionRole,
                instance.getExecutionModality());

        // adding parameters for AUDIT updating
        if (executionAuditId != null) {
          mapPars.put(AuditManager.AUDIT_ID, executionAuditId.toString());
        }

        Set parKeys = mapPars.keySet();
        Iterator parKeysIter = parKeys.iterator();
        do {
          if (!parKeysIter.hasNext()) {
            break;
          }
          String parkey = parKeysIter.next().toString();
          String parvalue = mapPars.get(parkey).toString();
          urlReturn =
              (new StringBuilder())
                  .append(urlReturn)
                  .append("&")
                  .append(parkey)
                  .append("=")
                  .append(parvalue)
                  .toString();
        } while (true);

      } else {

        // internal engine
        baseUrlReturn =
            GeneralUtilities.getSpagoBIProfileBaseUrl(profile.getUserUniqueIdentifier().toString());
        urlReturn = "&" + ObjectsTreeConstants.OBJECT_LABEL + "=" + objLabel;
        // identity string for context
        UUIDGenerator uuidGen = UUIDGenerator.getInstance();
        UUID uuid = uuidGen.generateRandomBasedUUID();
        urlReturn += "&" + LightNavigationManager.LIGHT_NAVIGATOR_ID + "=" + uuid.toString();
        if (document.getSnapshot() != null && document.getSnapshot()) {
          Snapshot snap = DAOFactory.getSnapshotDAO().getLastSnapshot(objId);
          if (snap != null) {
            urlReturn += "&SNAPSHOT_ID=" + snap.getId();
          }
          urlReturn += "&OBJECT_ID=" + objId;
          urlReturn += "&ACTION_NAME=GET_SNAPSHOT_CONTENT";
        } else {
          urlReturn +=
              "&PAGE=ExecuteBIObjectPage&"
                  + SpagoBIConstants.IGNORE_SUBOBJECTS_VIEWPOINTS_SNAPSHOTS
                  + "=true";
          urlReturn +=
              "&" + ObjectsTreeConstants.MODALITY + "=" + SpagoBIConstants.DOCUMENT_COMPOSITION;
        }
      }

      // I add passing of SBI_LANGUAGE and SBI_COUNTRY
      // on session container they are called AF_COUNTRY and AF_LANGUAGE
      SessionContainer sContainer = sessionContainer.getPermanentContainer();
      if (sContainer != null) {
        Object language = sContainer.getAttribute("AF_LANGUAGE");
        Object country = sContainer.getAttribute("AF_COUNTRY");
        if (language == null) {
          language = sContainer.getAttribute("SBI_LANGUAGE");
        }
        if (country == null) {
          country = sContainer.getAttribute("SBI_COUNTRY");
        }
        if (language != null && country != null) {
          urlReturn +=
              "&"
                  + SpagoBIConstants.SBI_LANGUAGE
                  + "="
                  + language
                  + "&"
                  + SpagoBIConstants.SBI_COUNTRY
                  + "="
                  + country;
        }
      }

      urlReturn += "&" + SpagoBIConstants.ROLE + "=" + executionRole;
      urlReturn += getParametersUrl(obj, document, requestSB, instance);
      // adds '|' char for management error into jsp if is necessary.

      urlReturn = baseUrlReturn + urlReturn;

      logger.debug("urlReturn: " + "|" + urlReturn);
    } catch (Exception ex) {
      logger.error("Error while getting execution url: " + ex);
      return null;
    } finally {
      monitor.stop();
    }

    logger.debug("OUT");

    return "|" + urlReturn;
  }