Java tutorial
/* * Copyright 2005-2010 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.mycompany.hr.ws; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Date; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.ws.server.endpoint.annotation.Endpoint; import org.springframework.ws.server.endpoint.annotation.PayloadRoot; import org.springframework.ws.server.endpoint.annotation.RequestPayload; import com.mycompany.hr.service.HumanResourceService; import org.jdom2.Element; import org.jdom2.JDOMException; import org.jdom2.Namespace; import org.jdom2.filter.Filters; import org.jdom2.xpath.XPathExpression; import org.jdom2.xpath.XPathFactory; /** * This endpoint handles holiday requests. It uses a combination of JDOM and XPath to extract interesting pieces of XML * from the incoming message, and invoked the injected {@link HumanResourceService} with those. * * @author Arjen Poutsma */ @Endpoint public class HolidayEndpoint { private static final String NAMESPACE_URI = "http://mycompany.com/hr/schemas"; private XPathExpression<Element> startDateExpression; private XPathExpression<Element> endDateExpression; private XPathExpression<Element> firstNameExpression; private XPathExpression<Element> lastNameExpression; private HumanResourceService humanResourceService; @Autowired public HolidayEndpoint(HumanResourceService humanResourceService) throws JDOMException { this.humanResourceService = humanResourceService; Namespace namespace = Namespace.getNamespace("hr", NAMESPACE_URI); XPathFactory xPathFactory = XPathFactory.instance(); startDateExpression = xPathFactory.compile("//hr:StartDate", Filters.element(), null, namespace); endDateExpression = xPathFactory.compile("//hr:EndDate", Filters.element(), null, namespace); firstNameExpression = xPathFactory.compile("//hr:FirstName", Filters.element(), null, namespace); lastNameExpression = xPathFactory.compile("//hr:LastName", Filters.element(), null, namespace); } @PayloadRoot(namespace = NAMESPACE_URI, localPart = "HolidayRequest") public void handleHolidayRequest(@RequestPayload Element holidayRequest) throws Exception { Date startDate = parseDate(startDateExpression, holidayRequest); Date endDate = parseDate(endDateExpression, holidayRequest); String name = firstNameExpression.evaluateFirst(holidayRequest).getText() + " " + lastNameExpression.evaluateFirst(holidayRequest).getText(); humanResourceService.bookHoliday(startDate, endDate, name); } private Date parseDate(XPathExpression<Element> expression, Element element) throws ParseException { Element result = expression.evaluateFirst(element); if (result != null) { SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd"); return dateFormat.parse(result.getText()); } else { throw new IllegalArgumentException("Could not evaluate [" + expression + "] on [" + element + "]"); } } }