How to get element and invalid xml file with failed xsd check

Question

I am currently using my XSD to validate my xml. This part works great, my problem is that I want to get an invalid tag / value element.

InputSource is = new InputSource(); is.setCharacterStream(new StringReader(xml)); XMLStreamReader reader = null; SchemaFactory factory=SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = factory.newSchema(xsdschemalocation); Validator validator = schema.newValidator(); try { reader = XMLInputFactory.newInstance().createXMLStreamReader(new StreamSource(new StringReader(xml))); } catch (XMLStreamException ex) { LogController.getLogger().logSEVERE("Unable to create the streamreader from the xml source", ex.getLocalizedMessage()); return false; } try { validator.validate(new StAXSource(reader)); } catch (IOException ex) { LogController.getLogger().logSEVERE("IOException in the validatation has been caused as the reader has become null", ex.getLocalizedMessage()); return false; } catch(SAXException saxe) { LogController.getLogger().logWARNING("Their is a validation error with the xml", saxe.getLocalizedMessage()); //*****HERE I WANT THE TAG THAT HAS THE ERROR ClientCommunication.ErrorMessageForClient(VALIDATION_ERROR, socket); CloseClientConnection(); return; } 

An idea that was impractical for me was to look in the message for the word “type” or “end-tag” and get the meaning after it, however I know that this will not be good practice! I find this disappointing as I see a tag that is invalid but cannot hold it!

Here are some examples of the item I want

 1. Message: Element type "first" must be followed by either attribute specifications, ">" or "/>". 2. javax.xml.stream.XMLStreamException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 353; cvc-pattern-valid: Value '079e989989' is not facet-valid with respect to pattern '([0-9])+' for type 'phoneNumber'. 3. Message: The element type "firstLine" must be terminated by the matching end-tag "</firstLine>". 

Answer 1

The following is a way to use your use case with ErrorHandler :

MyErrorHandler

I would recommend implementing an ErrorHandler that maintained a reference to the XMLStreamReader so that when a SAXParseException you can poll the XMLStreamReader to get information about the element. If you want parsing to stop after an exception is thrown, simply flip the SAXParseException at the end of each method.

 package forum11921190; import javax.xml.stream.XMLStreamReader; import org.xml.sax.*; public class MyErrorHandler implements ErrorHandler { private XMLStreamReader reader; public MyErrorHandler(XMLStreamReader reader) { this.reader = reader; } @Override public void error(SAXParseException e) throws SAXException { warning(e); } @Override public void fatalError(SAXParseException e) throws SAXException { warning(e); } @Override public void warning(SAXParseException e) throws SAXException { System.out.println(reader.getLocalName()); System.out.println(reader.getNamespaceURI()); e.printStackTrace(System.out); } } 

Demo

You are installing the ErrorHandler instance on the Validator .

 package forum11921190; import javax.xml.XMLConstants; import javax.xml.stream.*; import javax.xml.transform.stax.StAXSource; import javax.xml.transform.stream.StreamSource; import javax.xml.validation.*; public class Demo { private static final StreamSource XSD = new StreamSource("src/forum11921190/schema.xsd"); private static final StreamSource XML = new StreamSource("src/forum11921190/input.xml"); public static void main(String[] args) throws Exception { SchemaFactory factory=SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = factory.newSchema(XSD); XMLStreamReader reader = XMLInputFactory.newFactory().createXMLStreamReader(XML); Validator validator = schema.newValidator(); validator.setErrorHandler(new MyErrorHandler(reader)); validator.validate(new StAXSource(reader)); } } 

schema.xsd

The following is an example of the XML schema used to write the demo code.

 <?xml version="1.0" encoding="UTF-8"?> <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.com" xmlns:tns="http://www.example.com" elementFormDefault="qualified"> <element name="root"> <complexType> <sequence> <element name="foo" type="string"/> <element name="bar" type="int"/> </sequence> </complexType> </element> </schema> 

Input.xml

The following is an example input. The bar element has invalid content.

 <?xml version="1.0" encoding="UTF-8"?> <root xmlns="http://www.example.com"> <foo>valid</foo> <bar>invalid</bar> </root> 

Exit

The following is the result of running the demo code:

 bar http://www.example.com org.xml.sax.SAXParseException: cvc-datatype-valid.1.2.1: 'invalid' is not a valid value for 'integer'. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:423) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3188) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidType(XMLSchemaValidator.java:3103) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processElementContent(XMLSchemaValidator.java:3013) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleEndElement(XMLSchemaValidator.java:2156) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:824) at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:565) at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:261) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.handleEndElement(StAXStream2SAX.java:295) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.bridge(StAXStream2SAX.java:167) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.parse(StAXStream2SAX.java:120) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:674) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:723) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:336) at com.sun.org.apache.xerces.internal.jaxp.validation.StAXValidatorHelper.validate(StAXValidatorHelper.java:94) at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:118) at javax.xml.validation.Validator.validate(Validator.java:127) at forum11921190.Demo.main(Demo.java:26) bar http://www.example.com org.xml.sax.SAXParseException: cvc-type.3.1.3: The value 'invalid' of element 'bar' is not valid. at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:423) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3188) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidType(XMLSchemaValidator.java:3104) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processElementContent(XMLSchemaValidator.java:3013) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleEndElement(XMLSchemaValidator.java:2156) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:824) at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:565) at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:261) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.handleEndElement(StAXStream2SAX.java:295) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.bridge(StAXStream2SAX.java:167) at com.sun.org.apache.xalan.internal.xsltc.trax.StAXStream2SAX.parse(StAXStream2SAX.java:120) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:674) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:723) at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:336) at com.sun.org.apache.xerces.internal.jaxp.validation.StAXValidatorHelper.validate(StAXValidatorHelper.java:94) at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:118) at javax.xml.validation.Validator.validate(Validator.java:127) at forum11921190.Demo.main(Demo.java:26) 

Answer 2

Try this in catch code:

 catch(SAXException saxe) { Element invalidElement = (Element) validator.getProperty("http://apache.org/xml/properties/dom/current-element-node"); System.out.println("Error: " + saxe.getMessage()); System.out.println("Invalid element: " + invalidElement); }