code: public void set(String name, Object obj) throws IOException {
          if (!(obj instanceof Integer)) {
              throw new IOException("Attribute value should be of type Integer.");
          }
          if (name.equalsIgnoreCase(REQUIRE)) {
              require = ((Integer)obj).intValue();
          } else if (name.equalsIgnoreCase(INHIBIT)) {
              inhibit = ((Integer)obj).intValue();
          } else {
            throw new IOException("Attribute name " + "[" + name + "]" +
                                  " not recognized by " +
                                  "CertAttrSet:PolicyConstraints.");
          }
          encodeThis();
      }
docs: Set the attribute value.