/**
  * Gathers all of the attribute types in an entry along with the "objectclass" attribute type in a
  * List. The "objectclass" attribute is added to the list first so it is evaluated first.
  *
  * @param e Entry to gather the attributes for.
  * @return List containing the attribute types.
  */
 private List<AttributeType> getAllAttrs(Entry e) {
   Map<AttributeType, List<Attribute>> attrMap = e.getUserAttributes();
   Map<AttributeType, List<Attribute>> opAttrMap = e.getOperationalAttributes();
   List<AttributeType> typeList = new LinkedList<AttributeType>();
   Attribute attr = e.getObjectClassAttribute();
   /*
    * When a search is not all attributes returned, the "objectclass"
    * attribute type is missing from the entry.
    */
   if (attr != null) {
     AttributeType ocType = attr.getAttributeType();
     typeList.add(ocType);
   }
   typeList.addAll(attrMap.keySet());
   typeList.addAll(opAttrMap.keySet());
   return typeList;
 }
  /**
   * Checks to see if a LDAP modification is allowed access.
   *
   * @param container The structure containing the LDAP modifications
   * @param operation The operation to check modify privileges on. operation to check and the
   *     evaluation context to apply the check against.
   * @param skipAccessCheck True if access checking should be skipped.
   * @return True if access is allowed.
   * @throws DirectoryException If a modified ACI could not be decoded.
   */
  private boolean aciCheckMods(
      AciLDAPOperationContainer container,
      LocalBackendModifyOperation operation,
      boolean skipAccessCheck)
      throws DirectoryException {
    Entry resourceEntry = container.getResourceEntry();
    DN dn = resourceEntry.getDN();
    List<Modification> modifications = operation.getModifications();

    for (Modification m : modifications) {
      Attribute modAttr = m.getAttribute();
      AttributeType modAttrType = modAttr.getAttributeType();

      if (modAttrType.equals(aciType)) {
        /*
         * Check that the operation has modify privileges if it contains
         * an "aci" attribute type.
         */
        if (!operation.getClientConnection().hasPrivilege(Privilege.MODIFY_ACL, operation)) {
          Message message =
              INFO_ACI_MODIFY_FAILED_PRIVILEGE.get(
                  String.valueOf(container.getResourceDN()),
                  String.valueOf(container.getClientDN()));
          logError(message);
          return false;
        }
      }
      // This access check handles the case where all attributes of this
      // type are being replaced or deleted. If only a subset is being
      // deleted than this access check is skipped.
      ModificationType modType = m.getModificationType();
      if (((modType == ModificationType.DELETE) && modAttr.isEmpty())
          || ((modType == ModificationType.REPLACE) || (modType == ModificationType.INCREMENT))) {
        /*
         * Check if we have rights to delete all values of an attribute
         * type in the resource entry.
         */
        if (resourceEntry.hasAttribute(modAttrType)) {
          container.setCurrentAttributeType(modAttrType);
          List<Attribute> attrList = resourceEntry.getAttribute(modAttrType, modAttr.getOptions());
          if (attrList != null) {
            for (Attribute a : attrList) {
              for (AttributeValue v : a) {
                container.setCurrentAttributeValue(v);
                container.setRights(ACI_WRITE_DELETE);
                if (!skipAccessCheck && !accessAllowed(container)) {
                  return false;
                }
              }
            }
          }
        }
      }

      if (!modAttr.isEmpty()) {
        for (AttributeValue v : modAttr) {
          container.setCurrentAttributeType(modAttrType);
          switch (m.getModificationType()) {
            case ADD:
            case REPLACE:
              container.setCurrentAttributeValue(v);
              container.setRights(ACI_WRITE_ADD);
              if (!skipAccessCheck && !accessAllowed(container)) {
                return false;
              }
              break;
            case DELETE:
              container.setCurrentAttributeValue(v);
              container.setRights(ACI_WRITE_DELETE);
              if (!skipAccessCheck && !accessAllowed(container)) {
                return false;
              }
              break;
            case INCREMENT:
              Entry modifiedEntry = operation.getModifiedEntry();
              List<Attribute> modifiedAttrs =
                  modifiedEntry.getAttribute(modAttrType, modAttr.getOptions());
              if (modifiedAttrs != null) {
                for (Attribute attr : modifiedAttrs) {
                  for (AttributeValue val : attr) {
                    container.setCurrentAttributeValue(val);
                    container.setRights(ACI_WRITE_ADD);
                    if (!skipAccessCheck && !accessAllowed(container)) {
                      return false;
                    }
                  }
                }
              }
              break;
          }
          /*
           * Check if the modification type has an "aci" attribute type.
           * If so, check the syntax of that attribute value. Fail the
           * the operation if the syntax check fails.
           */
          if (modAttrType.equals(aciType) || modAttrType.equals(globalAciType)) {
            try {
              // A global ACI needs a NULL DN, not the DN of the
              // modification.
              if (modAttrType.equals(globalAciType)) {
                dn = DN.nullDN();
              }
              Aci.decode(v.getValue(), dn);
            } catch (AciException ex) {
              Message message =
                  WARN_ACI_MODIFY_FAILED_DECODE.get(String.valueOf(dn), ex.getMessage());
              throw new DirectoryException(ResultCode.INVALID_ATTRIBUTE_SYNTAX, message);
            }
          }
        }
      }
    }
    return true;
  }