Java tutorial
/* * Copyright 2015 the original author or authors. * * 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.devnexus.ting.web.converter; import org.apache.commons.lang.StringUtils; import org.springframework.core.convert.converter.Converter; import com.devnexus.ting.model.TicketGroup; /** * * @author Gunnar Hillert * @author Summers Pittman * */ public class StringToPurchaseGroup implements Converter<String, TicketGroup> { @Override public TicketGroup convert(String source) { if (StringUtils.isEmpty(source) || !StringUtils.isNumeric(source)) { return null; } else { return TicketGroup.fromId(Long.valueOf(source)); } } }