    001// Copyright 2010, 2012 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.Field;
    018import org.apache.tapestry5.MarkupWriter;
    019import org.apache.tapestry5.ValidationException;
    020import org.apache.tapestry5.ioc.MessageFormatter;
    021import org.apache.tapestry5.services.FormSupport;
    022
    023/**
    024 * The none validator is does nothing on either the client or the server; primarily it is employed
    025 * as the validate parameter, to override the validation specified in the {@link org.apache.tapestry5.beaneditor.Validate}
    026 * annotation of a property.
    027 */
    028public class None extends AbstractValidator<Void, Object>
    029{
    030    public None()
    031    {
    032        // It is inefficient if there is not a valid matching message key even though the implementation does nothing.
    033        // Previous releases used "required" here but that's confusing. The "private-" prefix keeps this from being
    034        // sent to the client (every byte counts!).
    035        super(null, Object.class, "private-no-validation-for-field", null);
    036    }
    037
    038    /**
    039     * Does nothing.
    040     */
    041    public void render(Field field, Void constraintValue, MessageFormatter formatter, MarkupWriter writer,
    042                       FormSupport formSupport)
    043    {
    044    }
    045
    046    /**
    047     * Does nothing.
    048     */
    049    public void validate(Field field, Void constraintValue, MessageFormatter formatter, Object value)
    050            throws ValidationException
    051    {
    052    }
    053}