/* * Copyright (c) 2002-2012 Alibaba Group Holding Limited. * All rights reserved. * * 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 com.alibaba.citrus.service.form.impl.validation; import com.alibaba.citrus.service.form.support.AbstractValidator; import com.alibaba.citrus.service.form.support.AbstractValidatorDefinitionParser; import com.alibaba.citrus.util.StringUtil; /** * 验证必填字段的validator。 * * @author Michael Zhou */ public class RequiredValidator extends AbstractValidator { public boolean validate(Context context) { Object value = context.getValue(); if (value instanceof String) { // 在trimming=false模式下,空白也算有值。 return !StringUtil.isEmpty((String) value); } else { return value != null; } } public static class DefinitionParser extends AbstractValidatorDefinitionParser<RequiredValidator> { } }