Re: Is possible to validate an XML file passing the schema as an argument?

[Maksym Kovalenko]

Yes and it is described in xerces howtos... Based on howtos the following code was created, I believe you can easily adopt it to your need.     public void init(File xs, File xml) throws SAXException, SAXNotSupportedException, IOException     {         String xsModelNameSpace = null;         XSModel xsModel = null;         SymbolTable sym = new SymbolTable(BIG_PRIME);         XMLGrammarPreparser preparser = new XMLGrammarPreparser(sym);         XMLGrammarPoolImpl grammarPool = new XMLGrammarPoolImpl();         preparser.registerPreparser(XMLGrammarDescription.XML_SCHEMA, null);         preparser.setProperty(GRAMMAR_POOL, grammarPool);         preparser.setFeature(NAMESPACES_FEATURE_ID, true);         preparser.setFeature(VALIDATION_FEATURE_ID, true);         // note we can set schema features just in case...         preparser.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);         preparser.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, true);         if (xs != null)         {             System.out.println("Started parsing schema " + xs.getAbsolutePath());             long t0 = System.currentTimeMillis();             try             {                 Grammar g = preparser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA,                                         stringToXIS(xs.getAbsolutePath()));                 XSGrammar xsGrammar = (XSGrammar) g;                 xsModelNameSpace = g.getGrammarDescription().getNamespace();                 xsModel = xsGrammar.toXSModel();             }             catch (Exception e)             {                 e.printStackTrace();                 System.exit(1);             }             System.out.println("Finished parsing schema " + xs.getAbsolutePath() + " (" + (System.currentTimeMillis() - t0) + " ms)");         }         XMLParserConfiguration parserConfiguration = new IntegratedParserConfiguration(sym, grammarPool);         try         {             parserConfiguration.setFeature(NAMESPACES_FEATURE_ID, true);             parserConfiguration.setFeature(VALIDATION_FEATURE_ID, true);             // now we can still do schema features just in case,             // so long as it's our configuraiton......             parserConfiguration.setFeature(SCHEMA_VALIDATION_FEATURE_ID, true);             parserConfiguration.setFeature(SCHEMA_FULL_CHECKING_FEATURE_ID, true);         }         catch (Exception e)         {             e.printStackTrace();             System.exit(1);         }         org.w3c.dom.Element root = null;         if (xml != null)         {             System.out.println("Started parsing document " + xml.getAbsolutePath());             long t0 = System.currentTimeMillis();             DOMParser parser = new DOMParser(parserConfiguration);             // Perform namespace processing: prefixes will be stripped off element and attribute names and             // replaced with the corresponding namespace URIs. By default, the two will simply be concatenated,             // but the namespace-sep core property allows the application to specify a delimiter string for             // separating the URI part and the local part.             parser.setFeature("http://xml.org/sax/features/namespaces", true);             // Validate the document and report validity errors.             parser.setFeature("http://xml.org/sax/features/validation", true);             // Turn on XML Schema validation by inserting XML Schema validator in the pipeline.             parser.setFeature("http://apache.org/xml/features/validation/schema", true);             // Enable full schema grammar constraint checking, including checking which may be time-consuming or             // memory intensive. Currently, particle unique attribution constraint checking and             // particle derivation resriction checking are controlled by this option. //                parser.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true);             // The fully qualified name of the class implementing the org.w3c.dom.Document interface.             // The implementation used must have a zero argument constructor.             //  org.apache.xerces.dom.PSVIDocumentImpl - Apache document implementation,             //      which knows how to create an element with PSVI information.             //  PSVI - post schema validation infoset             parser.setProperty("http://apache.org/xml/properties/dom/document-class-name",                     "org.apache.xerces.dom.PSVIDocumentImpl");             parser.parse(xml.getAbsolutePath());             System.out.println("Finished parsing document " + xml.getAbsolutePath() + " (" + (System.currentTimeMillis() - t0) + " ms)");             Document document = parser.getDocument();             root = document.getDocumentElement();             // retrieve PSVI for the root element             ElementPSVI rootPSVI;             rootPSVI = (ElementPSVI)root;             // retrieve the schema used in validation of this document             XSModel schema = rootPSVI.getSchemaInformation();             if (schema == null)                 throw new IllegalArgumentException("Schema file could not be located");             String docNamespace = root.getAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns");             if (xsModel == null)                 xsModel = schema;             else if (!docNamespace.equals(xsModelNameSpace))                 throw new IllegalArgumentException("Schema and document have different namespaces:\n\t" +                         xsModelNameSpace + "\n\t" + docNamespace + "\n respectively");         }     }     private XMLInputSource stringToXIS(String uri)     {         return new XMLInputSource(null, uri, null);     } -- Maksym Kovalenko Software Engineer Marketswitch Corporation http://www.marketswitch.com 108 Powers Court, Suite 225 Dulles, VA 20166 Phone: +1 (703) 444-6750 ext. 302 Fax: +1 (703) 444-6812