How to get context attribute values using JAVA?

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import wt.enterprise.EnterpriseHelper;
import wt.iba.value.DefaultAttributeContainer;
import wt.iba.value.IBAHolder;
import wt.iba.value.IBAValueUtility;
import wt.iba.value.litevalue.AbstractValueView;
import wt.iba.value.service.IBAValueHelper;
import wt.inf.container.WTContainerRef;
import wt.rule.algorithm.RuleAlgorithm;
import wt.util.WTContext;
import wt.util.WTException;

import java.rmi.RemoteException;
import java.util.Locale;

public class CustomNumberRule implements RuleAlgorithm {
 @Override
 public Object calculate(Object[] args, WTContainerRef wt_container_ref) {
 String iba_name = "ИНДЕКС_ТС";
 String iba_value = "";
 String num = "ОШИБКА ГЕНЕРАЦИИ";
 try {
 num = EnterpriseHelper.getNumber(args);
 String name;

 IBAHolder obj_iba_holder = (IBAHolder) wt_container_ref.getObject();
 IBAHolder iba_holder = IBAValueHelper.service.refreshAttributeContainer(obj_iba_holder, null, WTContext.getContext().getLocale(), null);
 DefaultAttributeContainer default_attribute_container = (DefaultAttributeContainer) iba_holder.getAttributeContainer();

 for (AbstractValueView abstract_value_view : default_attribute_container.getAttributeValues()) {
 name = abstract_value_view.getDefinition().getName();
 if (iba_name.equalsIgnoreCase(name)) {
 iba_value = IBAValueUtility.getLocalizedIBAValueDisplayString(abstract_value_view, Locale.getDefault());
 break;
 }
 }
 } catch (RemoteException | WTException e) {
 e.printStackTrace();
 }

 return iba_value + "." + num;
 }
}