Java tutorial
/******************************************************************************* * Copyright 2009 Time Space Map, LLC * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package org.tsm.concharto.web.edit; import org.springframework.validation.Errors; import org.springframework.validation.ValidationUtils; import org.springframework.validation.Validator; import org.tsm.concharto.web.util.ValidationHelper; public class EventFormValidator implements Validator { @SuppressWarnings("unchecked") public boolean supports(Class clazz) { return EventForm.class.equals(clazz); } public void validate(Object target, Errors errors) { ValidationUtils.rejectIfEmptyOrWhitespace(errors, "summary", "empty.event.summary"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "when", "empty.event.when"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "geometry", "empty.event.geometry"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "source", "empty.event.source"); ValidationHelper.rejectIfTooLong(errors, "description", EventForm.SZ_DESCRIPTION, "tooLong"); //These should never trigger if the HTML is coded correctly ValidationHelper.rejectIfTooLong(errors, "summary", EventForm.SZ_SUMMARY, "tooLong"); ValidationHelper.rejectIfTooLong(errors, "tags", EventForm.SZ_TAGS, "tooLong"); ValidationHelper.rejectIfTooLong(errors, "where", EventForm.SZ_WHERE, "tooLong"); ValidationHelper.rejectIfTooLong(errors, "source", EventForm.SZ_SOURCE, "tooLong"); EventForm eventForm = (EventForm) target; if ((null != eventForm.getGeometry()) && (0 == eventForm.getGeometry().getNumPoints())) { errors.rejectValue("geometry", "empty.event.geometry"); } } }