public synchronized Permission addPermission()

in extensions/torque/src/java/org/apache/turbine/services/security/torque/TorqueSecurityService.java [837:888]
44 lines of code
5 McCabe index (conditional complexity)

    public synchronized Permission addPermission(Permission permission)
        throws DataBackendException, EntityExistsException
    {
        boolean permissionExists = false;

        if (StringUtils.isEmpty(permission.getName()))
        {
            throw new DataBackendException("Could not create "
                                           + "a permission with empty name!");
        }

        try
        {
            lockExclusive();
            permissionExists = checkExists(permission);
            if (!permissionExists)
            {
                // add a row to the table
                Criteria criteria = PermissionPeerManager.buildCriteria(permission);
                PermissionPeerManager.doInsert(criteria);
                // try to get the object back using the name as key.
                criteria = new Criteria();
                criteria.add(PermissionPeerManager.getNameColumn(),
                             permission.getName());
                List results = PermissionPeerManager.doSelect(criteria);
                if (results.size() != 1)
                {
                    throw new DataBackendException(
                        "Internal error - query returned "
                        + results.size() + " rows");
                }
                Permission newPermission = (Permission) results.get(0);
                // add the permission to system-wide cache
                getAllPermissions().add(newPermission);
                // return the object with correct id
                return newPermission;
            }
        }
        catch (Exception e)
        {
            throw new DataBackendException(
                "addPermission(Permission) failed", e);
        }
        finally
        {
            unlockExclusive();
        }
        // the only way we could get here without return/throw tirggered
        // is that the permissionExists was true.
        throw new EntityExistsException("Permission '" + permission
                                        + "' already exists");
    }