Önek olmadan ad alanına XML ayrıştır: NAMESPACE_ERR

Question

İki XML belgesini ayrıştırmaya çalışıyorum: <root/> ve <root xmlns="hallo"/>. İlk durum iyi çalışır, ancak sonraki durumda bir istisna atar (xalan/xerces kullanılır, OpenJDK 1.6/1.7 ile birlikte gönderilir). Bazı googling, bunun bir önek olmadan bir XML ad alanının kullanımı nedeniyle gerçekleştiğini gösterir. Böyle bir belgeyi ayrıştırma bana egzotik olmaktan çok normaldir, bu yüzden problemin nasıl çözüleceğini merak ediyorum.

Sorunu bildiren bulduğum tüm insanlar bir SOAP uygulaması bağlamında sorun yaşadılar ve bazı karmaşık şeyler yapmaya çalıştılar, ancak basit bir kurulumla kimseyi bulamadım. Bazı kişiler xalan'ın v2.7'yi yükseltmesinin sorunu çözdüğünü ileri sürdü. Hangi sürümün OpenJDK ile gönderildiğini bilmiyorum, ancak v2.7.1'i sınıf yoluna açıkça koymaya çalıştım ve hiçbir şey değişmedi. (Bunun aslında kullanılan sürüm olduğunu nasıl doğrulayabilirim?).

Herhangi bir geçici çözüm var mı? Olmayan bir ad-aware ayrıştırıcı bir isim alanlı belgeyi ayrıştırmak çalışıyorsanız

ERROR: 'NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces.' 
javax.xml.transform.TransformerException: org.w3c.dom.DOMException: NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces. 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:720) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:317) 
    at de.smotive.server.resource.ResourceManagerTest.testName(ResourceManagerTest.java:36) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at org.testng.internal.MethodHelper.invokeMethod(MethodHelper.java:641) 
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:677) 
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:850) 
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1154) 
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:137) 
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:121) 
    at org.testng.TestRunner.runWorkers(TestRunner.java:1108) 
    at org.testng.TestRunner.privateRun(TestRunner.java:737) 
    at org.testng.TestRunner.run(TestRunner.java:596) 
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:315) 
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:310) 
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:272) 
    at org.testng.SuiteRunner.run(SuiteRunner.java:221) 
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) 
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) 
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1027) 
    at org.testng.TestNG.runSuitesLocally(TestNG.java:964) 
    at org.testng.TestNG.run(TestNG.java:896) 
    at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:89) 
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:144) 
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:111) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:616) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) 
Caused by: org.w3c.dom.DOMException: NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces. 
    at com.sun.org.apache.xerces.internal.dom.AttrNSImpl.setName(AttrNSImpl.java:108) 
    at com.sun.org.apache.xerces.internal.dom.AttrNSImpl.<init>(AttrNSImpl.java:77) 
    at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.createAttributeNS(CoreDocumentImpl.java:2142) 
    at com.sun.org.apache.xerces.internal.dom.ElementImpl.setAttributeNS(ElementImpl.java:659) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(SAX2DOM.java:213) 
    at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:208) 
    at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:281) 
    at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:247) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:604) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:183) 
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java:814) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1320) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDriver.scanRootElementHook(XMLDocumentScannerImpl.java:1293) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3080) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:899) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:625) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:488) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:819) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:748) 
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1208) 
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:525) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:640) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:711) 
    ... 32 more 
--------- 
org.w3c.dom.DOMException: NAMESPACE_ERR: An attempt is made to create or change an object in a way which is incorrect with regard to namespaces. 
    at com.sun.org.apache.xerces.internal.dom.AttrNSImpl.setName(AttrNSImpl.java:108) 
    at com.sun.org.apache.xerces.internal.dom.AttrNSImpl.<init>(AttrNSImpl.java:77) 
    at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.createAttributeNS(CoreDocumentImpl.java:2142) 
    at com.sun.org.apache.xerces.internal.dom.ElementImpl.setAttributeNS(ElementImpl.java:659) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(SAX2DOM.java:213) 
    at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:208) 
    at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:281) 
    at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:247) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:604) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:183) 
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java:814) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1320) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDriver.scanRootElementHook(XMLDocumentScannerImpl.java:1293) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3080) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:899) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:625) 
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:488) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:819) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:748) 
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123) 
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1208) 
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:525) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:640) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:711) 
    at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:317) 
    at de.smotive.server.resource.ResourceManagerTest.testName(ResourceManagerTest.java:36) 

Answer 1

: İşte atılan istisna

public class DemoTest { 

    @Test(dataProvider = "provide_xml") 
    public void transform_doesNotThrowException(final String xml) throws Exception { 
    final SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser(); 
    final SAXSource saxSource = new SAXSource(saxParser.getXMLReader(), new InputSource(new StringReader(xml))); 

    final Transformer transformer = TransformerFactory.newInstance().newTransformer(); 
    final Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument(); 
    final DOMResult result = new DOMResult(document); 
    transformer.transform(saxSource, result); 
    } 

    @DataProvider 
    public Object[][] provide_xml() { 
    return new Object[][]{ 
     {"<root/>"}, // works 
     {"<root xmlns=\"hello\"/>"} // broken 
    }; 
    } 
} 

: Burada

benim Problem olan bir testtir.

Varsayılan olarak, SAX ve DOM ayrıştırıcıları ad alanıyla uyumlu değildir, fabrikada setNamespace()'u açıkça aramanız gerekir. Aşağıdaki gibi görünecek kodunuzu değiştirin ve gitmek için iyi olmalısınız:

SAXParserFactory spf = SAXParserFactory.newInstance(); 
spf.setNamespaceAware(true); 
final SAXParser saxParser = spf.newSAXParser();