public class OOP {
    private SomeService someService;

    private final class OrganizationPrimaryKeyString implements Serializable {
        private static final long serialVersionUID = -256615521081939636L;
        private final String pkString

        public OrganizationPrimaryKeyString(final OrganizationEnum organizationEnum) {
            final PK pk = someService.getValue(organizationEnum).getPk();

            if (pk == null) {
                throw new IllegalArgumentException("Can't be null");
            }

            pkString = pk.getLongValueAsString();
        }

        @Override
        public String toString() {
            return pkString;
        }
    }

    public List<Information> getInformation(final OrganizationEnum organizationEnum) {
        final OrganizationPrimaryKeyString organization = new OrganizationPrimaryKeyString(organizationEnum);

        try {
            final SessionContext ctx = createAndSetupLocalSessionContext(organization);

            (...)

            return (...);
        } catch (final FactoryException e) {
            throw new SystemException(e.getMessage(), e);
        } finally {
            closeLocalSessionContext();
        }
    }

    private SessionContext createAndSetupLocalSessionContext(final OrganizationPrimaryKeyString organization) {
        (...)
        sessionContext.setAttribute("organization", salesOrganization.toString());

        return sessionContext;
    }
}

public class OOP {
    private SomeService someService;

    public List<Information> getInformation(final OrganizationEnum organizationEnum) {
        try {
            final SessionContext ctx = createAndSetupLocalSessionContext(organizationEnum);

            (...)

            return (...);
        } catch (final FactoryException e) {
        throw new SystemException(e.getMessage(), e);
        } finally {
            closeLocalSessionContext();
        }
    }

    private SessionContext createAndSetupLocalSessionContext(final OrganizationEnum organizationEnum) {
        (...)
        sessionContext.setAttribute("organization", getPkString(organizationEnum));

        return sessionContext;
    }

    private String getPkString(final OrganizationEnum organizationEnum) {
        final PK pk = someService.getValue(organizationEnum).getPk();

        if (pk == null) {
            throw new IllegalArgumentException("Can't be null");
        }

        return pk.getLongValueAsString();
    }
}