Java tutorial
// Copyright (C) 2011 Markus Fischer // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; version 2 of the License. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // Contact: info@doctor-doc.com package ch.dbs.actions.bestellung; import java.io.IOException; import java.io.StringReader; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpression; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import org.apache.commons.lang.StringEscapeUtils; import org.jsoup.Jsoup; import org.jsoup.safety.Whitelist; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import ch.dbs.form.EZBDataOnline; import ch.dbs.form.EZBDataPrint; import ch.dbs.form.EZBForm; import ch.dbs.form.EZBReference; import enums.JOPState; public class EZBJOP { private static final Logger LOG = LoggerFactory.getLogger(EZBJOP.class); /** * This class uses the official EZB/ZDB API from * http://services.dnb.de/fize-service/gvr/full.xml. */ public EZBForm read(final String content) { final EZBForm ezbform = new EZBForm(); try { if (content != null) { final DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance(); domFactory.setNamespaceAware(true); final DocumentBuilder builder = domFactory.newDocumentBuilder(); final Document doc = builder.parse(new InputSource(new StringReader(content))); final XPathFactory factory = XPathFactory.newInstance(); final XPath xpath = factory.newXPath(); // references electronic data // final XPathExpression exprRefE = xpath.compile("//ElectronicData/References/Reference"); // final NodeList resultListRefE = (NodeList) exprRefE.evaluate(doc, XPathConstants.NODESET); // // for (int i = 0; i < resultListRefE.getLength(); i++) { // final Node firstResultNode = resultListRefE.item(i); // final Element result = (Element) firstResultNode; // // final EZBReference ref = new EZBReference(); // // // EZB URLs // final String url = getValue(result.getElementsByTagName("URL")); // ref.setUrl(url); // // // Label for URLs // final String label = getValue(result.getElementsByTagName("Label")); // ref.setLabel(label); // // ezbform.getReferencesonline().add(ref); // } // electronic data final XPathExpression exprE = xpath.compile("//ElectronicData/ResultList/Result"); final NodeList resultListE = (NodeList) exprE.evaluate(doc, XPathConstants.NODESET); for (int i = 0; i < resultListE.getLength(); i++) { final Node firstResultNode = resultListE.item(i); final Element result = (Element) firstResultNode; final EZBDataOnline online = new EZBDataOnline(); // state online.setState(Integer.valueOf(result.getAttribute("state"))); // 0 free accessible if (online.getState() == JOPState.FREE.getValue()) { online.setAmpel("green"); online.setComment("availresult.free"); // 1 partially free accesible } else if (online.getState() == JOPState.FREE_PARTIALLY.getValue()) { online.setAmpel("green"); online.setComment("availresult.partially_free"); // 2 licensed ; 3 partially licensed } else if (online.getState() == JOPState.LICENSED.getValue() || online.getState() == JOPState.LICENSED_PARTIALLY.getValue()) { online.setAmpel("yellow"); online.setComment("availresult.abonniert"); // journal not online for periode } else if (online.getState() == JOPState.OUTSIDE_PERIOD.getValue()) { online.setAmpel("red"); online.setComment("availresult.timeperiode"); // not indexed } else if (online.getState() == JOPState.NO_HITS.getValue()) { online.setAmpel("red"); online.setComment("availresult.nohits"); } else { online.setAmpel("red"); online.setComment("availresult.not_licensed"); } // title String title = getValue(result.getElementsByTagName("Title")); if (title != null) { title = Jsoup.clean(title, Whitelist.none()); online.setTitle(Jsoup.parse(title).text()); } online.setUrl(getValue(result.getElementsByTagName("AccessURL"))); online.setLevel(getValue(result.getElementsByTagName("AccessLevel"))); online.setReadme(getValue(result.getElementsByTagName("ReadmeURL"))); // National licenses etc. online.setAdditional(getValue(result.getElementsByTagName("Additional"))); ezbform.getOnline().add(online); } // Title not found if (resultListE.getLength() == 0) { final EZBDataOnline online = new EZBDataOnline(); online.setAmpel("red"); online.setComment("availresult.nohits"); online.setState(JOPState.NO_HITS.getValue()); ezbform.getOnline().add(online); } // references print data final XPathExpression exprRefP = xpath.compile("//PrintData/References/Reference"); final NodeList resultListRefP = (NodeList) exprRefP.evaluate(doc, XPathConstants.NODESET); final EZBReference ref = new EZBReference(); for (int i = 0; i < resultListRefP.getLength(); i++) { final Node firstResultNode = resultListRefP.item(i); final Element result = (Element) firstResultNode; // EZB URLs ref.setUrl(getValue(result.getElementsByTagName("URL"))); // Label for URLs // final String label = getValue(result.getElementsByTagName("Label")); ref.setLabel("availresult.link_title_print"); ezbform.getReferencesprint().add(ref); } // print data final XPathExpression exprP = xpath.compile("//PrintData/ResultList/Result"); final NodeList resultListP = (NodeList) exprP.evaluate(doc, XPathConstants.NODESET); for (int i = 0; i < resultListP.getLength(); i++) { final Node firstResultNode = resultListP.item(i); final Element result = (Element) firstResultNode; final EZBDataPrint print = new EZBDataPrint(); // state print.setState(Integer.valueOf(result.getAttribute("state"))); // title String title = getValue(result.getElementsByTagName("Title")); if (title != null) { title = Jsoup.clean(title, Whitelist.none()); print.setTitle(Jsoup.parse(title).text()); } print.setLocation(getValue(result.getElementsByTagName("Location"))); print.setCallnr(getValue(result.getElementsByTagName("Signature"))); print.setCoverage(getValue(result.getElementsByTagName("Period"))); // set previous extracted URL and label print.setInfo(ref); // in stock ; partially in stock if (print.getState() == JOPState.LICENSED.getValue() || print.getState() == JOPState.LICENSED_PARTIALLY.getValue()) { print.setAmpel("yellow"); print.setComment("availresult.print"); // only return if existing in Print ezbform.getPrint().add(print); } } } } catch (final XPathExpressionException e) { LOG.error(e.toString()); } catch (final SAXParseException e) { LOG.error(e.toString()); } catch (final SAXException e) { LOG.error(e.toString()); } catch (final IOException e) { LOG.error(e.toString()); } catch (final ParserConfigurationException e) { LOG.error(e.toString()); } catch (final Exception e) { LOG.error(e.toString()); } return ezbform; } private String getValue(final NodeList list) { String result = null; final Element listElement = (Element) list.item(0); if (listElement != null) { final NodeList textList = listElement.getChildNodes(); if (textList.getLength() > 0) { result = StringEscapeUtils.unescapeXml(textList.item(0).getNodeValue()); } } return result; } }