    001// Copyright 2010 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.validator;
    016
    017import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    018
    019/**
    020 * Allows support for "validator macros", a simple-minded way of combining several related valiations together under
    021 * a single name. The service's configuration maps string keys (macro names) to string values (validation constraints).
    022 *
    023 * @since 5.2.0
    024 */
    025@UsesMappedConfiguration(String.class)
    026public interface ValidatorMacro
    027{
    028    /**
    029     * Given a <em>potential</em> validator macro (a simple string name), returns the value for that macro, a
    030     * comma-separated list of validation constraints.
    031     *
    032     * @return constraints, or null if no such validator macro
    033     */
    034    String valueForMacro(String validatorMacro);
    035}