XSD Tutorials - Herong's Tutorial Examples - v5.23, by Herong Yang
Xsd11SchemaValidator.java for XSD 1.1 Validation
This section provides a tutorial example on calling SchemaFactory.newInstance() with 'http://www.w3.org/XML/XMLSchema/v1.1' for XSD 1.1 validation.
After reading documentations from Apache Xerces2 Website, I see why my SAXValidatorXsd11.java program failed to validate XSD 1.1 schema documents. The "org.apache.xerces.parsers.SAXParser" class is using a default configuration that assumes XSD 1.0, not XSD 1.1.
In order to support XSD 1.1, we need to find a way to change the configuration setting to use "http://www.w3.org/XML/XMLSchema/v1.1" as the schema language. Unfortunately, there seems to be no way to modify this setting in the SAXPAser interface.
So I have to change the way how XSD validation is performed. Instead of using a parser to validate XML schema while parsing the XML document, I need to load the XSD 1.1 document as a Schema object and use it to valide the XML document. Here is my sample program, Xsd11SchemaValidator.java:
/* Xsd11SchemaValidator.java - Copyright (c) 2013 HerongYang.com. All Rights Reserved. */ import javax.xml.validation.SchemaFactory; import javax.xml.validation.Schema; import javax.xml.XMLConstants; import javax.xml.transform.sax.SAXSource; import org.xml.sax.InputSource; import javax.xml.validation.Validator; import java.io.*; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import org.xml.sax.ErrorHandler; class Xsd11SchemaValidator { private static int errorCount = 0; public static void main(String[] a) { if (a.length<2) { System.out.println("Usage:"); System.out.println("java Xsd11SchemaValidator schema_file_name " + "xml_file_name"); } else { String schemaName = a[0]; String xmlName = a[1]; Schema schema = loadSchema(schemaName); validateXml(schema, xmlName); } } public static void validateXml(Schema schema, String xmlName) { try { // creating a Validator instance Validator validator = schema.newValidator(); // setting my own error handler validator.setErrorHandler(new MyErrorHandler()); // preparing the XML file as a SAX source SAXSource source = new SAXSource( new InputSource(new java.io.FileInputStream(xmlName))); // validating the SAX source against the schema validator.validate(source); System.out.println(); if (errorCount>0) { System.out.println("Failed with errors: "+errorCount); } else { System.out.println("Passed."); } } catch (Exception e) { // catching all validation exceptions System.out.println(); System.out.println(e.toString()); } } public static Schema loadSchema(String name) { Schema schema = null; try { // String language = XMLConstants.W3C_XML_SCHEMA_NS_URI; String language = "http://www.w3.org/XML/XMLSchema/v1.1"; SchemaFactory factory = SchemaFactory.newInstance(language); schema = factory.newSchema(new File(name)); } catch (Exception e) { System.out.println(e.toString()); } return schema; } private static class MyErrorHandler implements ErrorHandler { public void warning(SAXParseException e) throws SAXException { System.out.println("Warning: "); printException(e); } public void error(SAXParseException e) throws SAXException { System.out.println("Error: "); printException(e); } public void fatalError(SAXParseException e) throws SAXException { System.out.println("Fattal error: "); printException(e); } private void printException(SAXParseException e) { errorCount++; System.out.println(" Line number: "+e.getLineNumber()); System.out.println(" Column number: "+e.getColumnNumber()); System.out.println(" Message: "+e.getMessage()); System.out.println(); } } }
Notice that how the "SchemaFactory.newInstance" method is used to create a new schema object with language="http://www.w3.org/XML/XMLSchema/v1.1" parameter.
Test result is presented in next tutorials.
Table of Contents
XML Editor and Schema Processor - XMLPad
Java API for XML Processing - JAXP
JAXP - XML Schema (XSD) Validation
Xerces2 Java Parser - Java API of XML Parsers
JAXP, DOM and SAX APIs in Xerces2 JARs
XML Schema (XSD) Validation using XMLReader
Running XMLReaderValidator on XSD 1.1 Schema
XML Schema (XSD) Validation using SAXParser
SAXParser for XSD Validation Fixed
SAXParser for XSD 1.1 Validation
►Xsd11SchemaValidator.java for XSD 1.1 Validation
Xsd11SchemaValidator.java XSD 1.1 Test Result
Introduction of XSD Built-in Datatypes
"string" and Its Derived Datatypes
"decimal" and Its Derived Datatypes
"dateTime" and Its Related Datatypes
Miscellaneous Built-in Datatypes
Facets, Constraining Facets and Restriction Datatypes
"simpleType" - Defining Your Own Simple Datatypes
Identity-Constraints: unique, key and keyref
Assertion as Custom Validation Rules
XML Schema Location and Namespace in XML Documents
Overriding Element Types in XML Documents