    001// Copyright 2008 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.services;
    016
    017import org.apache.tapestry5.NullFieldStrategy;
    018import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    019
    020/**
    021 * A source for {@link org.apache.tapestry5.NullFieldStrategy} instances based on a logical name.
    022 */
    023@UsesMappedConfiguration(NullFieldStrategy.class)
    024public interface NullFieldStrategySource
    025{
    026    /**
    027     * Returns the instance based on the name.  Instances are expected to be stateless and therefore, shareable and
    028     * thread safe.
    029     *
    030     * @param name name of the strategy (case is ignored)
    031     * @return the strategy
    032     * @throws IllegalArgumentException if the name does not match a configured instance
    033     */
    034    NullFieldStrategy get(String name);
    035}