关于项目自动化测试架构的改良计划-解析XInclude标记
因为在test_suite.xml中,我们多处使用了XInclude标记,他们会被申明在一个叫"http://www.w3.org/2001/XInclude" 的名字空间中,并且引入部分用xi:include来声明,我们这个类的作用就是把这些所有的
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/** * This class will handle converting a xinclude+xpointer marked xml file to a normal xml file * Because of the shortage of the current jdk ,it only support the xPointer with element instead of NCName *@author cwang58 *@created date: Jun 10, 2013 */ public class XIncludeConverter { /** * this method will handle change the XInclude+XPointer marked xml as normal xml * @param origialXML the original xml which has the xInclude feature * @return the parsedXML without the xInclude feature */ public static String convertXInclude2NormalXML(String originalXML) throws SAXException,ParserConfigurationException,TransformerConfigurationException,IOException,TransformerException{ DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); //open up the namespace aware so that it can recognize the "xi" namespace factory.setNamespaceAware(true); //let this SAXParser support XInclude factory.setXIncludeAware(true); //factory.setValidating(true); //ignore all the comments added in the source document factory.setIgnoringComments(true); DocumentBuilder docBuilder = factory.newDocumentBuilder(); Document doc = docBuilder.parse(new InputSource(new ByteArrayInputStream(originalXML.getBytes("utf-8")))); Transformer transformer = TransformerFactory.newInstance().newTransformer(); //format the output xml string so it support indent and more readable transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //initialize StreamResult with File object to save to file StreamResult result = new StreamResult(new StringWriter()); DOMSource source = new DOMSource(doc); transformer.transform(source, result); return result.getWriter().toString(); }
这里讲一个小插曲,其实,W3C中,XInclude经常和Xpointer联合起来应用的,xpointer可以帮助来定位目标文件的某个小片段而不是整个目标文件,定位方法可以用element(),或者xpointer(),如果element的话,可以用(/1/2/3)这种方式来定位DOM,或者基于 id,对应java的解析框架是xerce,但是非常不幸运的是,最新版本的xerce框架只支持element(/1/3/4/5)这种定位,而对于基于schema-id的方式,也就是某个element声明了id的情况,它没办法定位,但是未来可能会支持这个功能。
http://xerces.apache.org/xerces2-j/faq-xinclude.html#faq-8
基于上述的局限性,我决定只采用xi:include来包含全部文件,然后局部调整的做法,并且绕过xpointer。
所以实现代码如上所示,事实上从JDK 1.6开始,他已经提供了对XInclude的支持,内部是委托给xerce来实现的,这是对应架构图的第3-4步骤。
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