Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.StringReader;
import javax.xml.XMLConstants;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

public class Main {
    public static void main(String[] args) throws Exception {
        String xml = "<?xml version='1.0'?><test><test2></test2></test>";
        String schemaString = //
                "<?xml version='1.0'?>"//
                        + "<xsd:schema xmlns:xsd='http://www.w3.org/2001/XMLSchema' elementFormDefault='unqualified' attributeFormDefault='unqualified'>"//
                        + "<xsd:element name='test' type='Test'/>"//
                        + "<xsd:element name='test2' type='Test2'/>"//
                        + "<xsd:complexType name='Test'>"//
                        + "<xsd:sequence>"//
                        + "<xsd:element ref='test2' minOccurs='1' maxOccurs='unbounded'/>"//
                        + "</xsd:sequence>"//
                        + "</xsd:complexType>"//
                        + "<xsd:simpleType name='Test2'>"//
                        + "<xsd:restriction base='xsd:string'><xsd:minLength value='1'/></xsd:restriction>"//
                        + "</xsd:simpleType>"//
                        + "</xsd:schema>";

        Source schemaSource = new StreamSource(new StringReader(schemaString));
        Schema schema = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(schemaSource);

        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setNamespaceAware(true);
        factory.setSchema(schema);
        SAXParser parser = factory.newSAXParser();
        MyContentHandler handler = new MyContentHandler();
        parser.parse(new InputSource(new StringReader(xml)), handler);

    }

    static class MyContentHandler extends DefaultHandler {
        private String element = "";

        @Override
        public void startElement(String uri, String localName, String qName, Attributes attributes)
                throws SAXException {

            if (localName != null && !localName.isEmpty())
                element = localName;
            else
                element = qName;

        }

        @Override
        public void warning(SAXParseException exception) throws SAXException {
            System.out.println(element + ": " + exception.getMessage());
        }

        @Override
        public void error(SAXParseException exception) throws SAXException {
            System.out.println(element + ": " + exception.getMessage());
        }

        @Override
        public void fatalError(SAXParseException exception) throws SAXException {
            System.out.println(element + ": " + exception.getMessage());
        }

        public String getElement() {
            return element;
        }
    }
}