Examples of org.springframework.dao.EmptyResultDataAccessException

org.springframework.dao.EmptyResultDataAccessException
Data access exception thrown when a result was expected to have at least one row (or element) but zero rows (or elements) were actually returned. @author Juergen Hoeller @since 2.0 @see IncorrectResultSizeDataAccessException

   * has been found in the given Collection
   */
  public static <T> T requiredSingleResult(Collection<T> results) throws IncorrectResultSizeDataAccessException {
    int size = (results != null ? results.size() : 0);
    if (size == 0) {
      throw new EmptyResultDataAccessException(1);
    }
    if (results.size() > 1) {
      throw new IncorrectResultSizeDataAccessException(1, size);
    }
    return results.iterator().next();

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   * @see org.springframework.util.CollectionUtils#hasUniqueObject
   */
  public static <T> T requiredUniqueResult(Collection<T> results) throws IncorrectResultSizeDataAccessException {
    int size = (results != null ? results.size() : 0);
    if (size == 0) {
      throw new EmptyResultDataAccessException(1);
    }
    if (!CollectionUtils.hasUniqueObject(results)) {
      throw new IncorrectResultSizeDataAccessException(1, size);
    }
    return results.iterator().next();

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    // Check for well-known PersistenceException subclasses.
    if (ex instanceof EntityNotFoundException) {
      return new JpaObjectRetrievalFailureException((EntityNotFoundException) ex);
    }
    if (ex instanceof NoResultException) {
      return new EmptyResultDataAccessException(ex.getMessage(), 1, ex);
    }
    if (ex instanceof NonUniqueResultException) {
      return new IncorrectResultSizeDataAccessException(ex.getMessage(), 1, ex);
    }
    if (ex instanceof QueryTimeoutException) {

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   * @throws DataAccessException a corresponding exception,
   * by default an EmptyResultDataAccessException
   * @see org.springframework.dao.EmptyResultDataAccessException
   */
  protected void handleNoRowFound() throws DataAccessException {
    throw new EmptyResultDataAccessException(
        "LobStreamingResultSetExtractor did not find row in database", 1);
  }

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   * has been found in the given Collection
   */
  public static <T> T requiredSingleResult(Collection<T> results) throws IncorrectResultSizeDataAccessException {
    int size = (results != null ? results.size() : 0);
    if (size == 0) {
      throw new EmptyResultDataAccessException(1);
    }
    if (results.size() > 1) {
      throw new IncorrectResultSizeDataAccessException(1, size);
    }
    return results.iterator().next();

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   * @see org.springframework.util.CollectionUtils#hasUniqueObject
   */
  public static <T> T requiredUniqueResult(Collection<T> results) throws IncorrectResultSizeDataAccessException {
    int size = (results != null ? results.size() : 0);
    if (size == 0) {
      throw new EmptyResultDataAccessException(1);
    }
    if (!CollectionUtils.hasUniqueObject(results)) {
      throw new IncorrectResultSizeDataAccessException(1, size);
    }
    return results.iterator().next();

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            throw new DataRetrievalFailureException("Failed to retrieve ChannelDefinition for fName='" + fName + "'", e);
        }


        //The channel definition for the fName MUST exist for this class to function
        if (portletDefinition == null) {
            throw new EmptyResultDataAccessException("No ChannelDefinition exists for fName='" + fName + "'", 1);
        }


        //create the portlet entity
        final IPortletDefinitionId portletDefinitionId = portletDefinition.getPortletDefinitionId();
        return this.portletEntityDao.createPortletEntity(portletDefinitionId, layoutNodeId, userId);

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            throw new DataRetrievalFailureException("Failed to retrieve ChannelDefinition for fName='" + fName + "'", e);
        }
        
        //The channel definition for the fName MUST exist for this class to function
        if (portletDefinition == null) {
            throw new EmptyResultDataAccessException("No ChannelDefinition exists for fName='" + fName + "'", 1);
        }
        
        //get/create the portlet entity
        final IPortletEntity portletEntity = this.portletEntityDao.getPortletEntity(layoutNodeId, userId);
        if (portletEntity != null) {

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    // Check for well-known PersistenceException subclasses.
    if (ex instanceof EntityNotFoundException) {
      return new JpaObjectRetrievalFailureException((EntityNotFoundException) ex);
    }
    if (ex instanceof NoResultException) {
      return new EmptyResultDataAccessException(ex.getMessage(), 1);
    }
    if (ex instanceof NonUniqueResultException) {
      return new IncorrectResultSizeDataAccessException(ex.getMessage(), 1);
    }
    if (ex instanceof OptimisticLockException) {

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      if (assertUpdates) {
        for (int i = 0; i < updateCounts.length; i++) {
          int value = updateCounts[i];
          if (value == 0) {
            throw new EmptyResultDataAccessException("Item " + i + " of " + updateCounts.length
                + " did not update any rows: [" + items.get(i) + "]", 1);
          }
        }
      }
    }

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