public final Map act(Redirector redirector,
    SourceResolver resolver,
    Map objectModel,
    String source,
    Parameters param) throws Exception 
{
                                
        DataSourceComponent datasource = null;
        Connection conn = null;
        int currentIndex = 0;
        // read global parameter settings
        boolean reloadable = Constants.DESCRIPTOR_RELOADABLE_DEFAULT;
        if (this.settings.containsKey("reloadable"))
            reloadable = Boolean.valueOf((String) this.settings.get("reloadable")).booleanValue();
        // read local parameter settings
        try {
            Configuration conf =
                this.getConfiguration(param.getParameter("descriptor", (String) this.settings.get("descriptor")), resolver,
                                      param.getParameterAsBoolean("reloadable",reloadable));
            String query = this.getDeleteQuery(conf);
            datasource = this.getDataSource(conf);
            conn = datasource.getConnection();
            Request request = ObjectModelHelper.getRequest(objectModel);
            if (conn.getAutoCommit()) {
                conn.setAutoCommit(false);
            }
            PreparedStatement statement = conn.prepareStatement(query);
            Configuration[] keys = conf.getChild("table").getChild("keys").getChildren("key");
            for (int i = 0; i <  keys.length; i++) {
                this.setColumn(statement, i + 1, request, keys[i]);
            }
            int rows = statement.executeUpdate();
            conn.commit();
            statement.close();
            if (rows  > 0) {
                request.setAttribute("rows", Integer.toString(rows));
                return EMPTY_MAP;
            }
        } catch (Exception e) {
            if (conn != null) {
                conn.rollback();
            }
            throw new ProcessingException("Could not delete record :position = " + currentIndex, e);
        } finally {
            if (conn != null) {
                try {
                    conn.close();
                } catch (SQLException sqe) {
                    getLogger().warn("There was an error closing the datasource", sqe);
                }
            }
            if (datasource != null) {
                this.dbselector.release(datasource);
            }
        }
        return null;
}

Delete a record from the database. This action assumes that the file referenced by the "descriptor" parameter conforms to the AbstractDatabaseAction specifications.