    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.internal;
    016
    017import org.apache.tapestry5.NullFieldStrategy;
    018
    019/**
    020 * Default strategy, which is to do nothing: null values stay null.
    021 */
    022public class DefaultNullFieldStrategy implements NullFieldStrategy
    023{
    024    /**
    025     * Returns null.
    026     */
    027    public Object replaceToClient()
    028    {
    029        return null;
    030    }
    031
    032    /**
    033     * Returns null .
    034     */
    035    public String replaceFromClient()
    036    {
    037        return null;
    038    }
    039}