prototype of schema validation, only commenting out 1 test case for that

src/main/java/ZUV/XMLValidator.java

@@ -6,6 +6,7 @@
 import java.io.PrintWriter;
 import java.io.StringReader;
 import java.io.StringWriter;
+import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
@@ -14,9 +15,13 @@
 import java.util.Date;
 import java.util.List;
 
+import javax.xml.XMLConstants;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.transform.Source;
 import javax.xml.transform.stream.StreamSource;
+import javax.xml.validation.Schema;
+import javax.xml.validation.SchemaFactory;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathConstants;
 import javax.xml.xpath.XPathExpression;
@@ -31,6 +36,7 @@
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
 
 import com.helger.schematron.ISchematronResource;
 import com.helger.schematron.xslt.SchematronResourceXSLT;
@@ -107,6 +113,8 @@ public void validate() {
 		int firedRules=0;
 		int failedRules=0;
 
+		validateSchema();
+
 		ByteArrayInputStream xmlByteInputStream = new ByteArrayInputStream(zfXML.getBytes(StandardCharsets.UTF_8));
 
 		if (zfXML.isEmpty()) {
@@ -314,5 +322,22 @@ public void validate() {
 				  "</profile><validator version=\""+Main.class.getPackage().getImplementationVersion()+"\"></validator><validation datetime=\""+isoDF.format(date)+"\"><rules><fired>"+firedRules+"</fired><failed>"+failedRules+"</failed></rules>" + "<duration unit='ms'>" + (endTime - startXMLTime) + "</duration></validation></info>");
 
 	}
+	protected void validateSchema() {
+		URL schemaFile = ClassLoader.getSystemResource("schema/EN16931/zugferd2p0_en16931.xsd");
+		Source xmlFile = new StreamSource(new StringReader(zfXML));
+		SchemaFactory schemaFactory = SchemaFactory
+		    .newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+		try {
+		  Schema schema = schemaFactory.newSchema(schemaFile);
+		  javax.xml.validation.Validator validator = schema.newValidator();
+		  validator.validate(xmlFile);
+		} catch (SAXException e) {
+			context.addResultItem(new ValidationResultItem(ESeverity.error, "schema validation fails:"+e).setSection(18)
+					.setPart(EPart.xml));
+		} catch (IOException e) {
+			LOGGER.error(e.getMessage(), e);
+		}
+
+	}
 
 }

src/main/resources/schema/BASIC/zugferd2p0_basicwl_minimum.xsd

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:rsm="urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100"
+    xmlns:xs="http://www.w3.org/2001/XMLSchema"
+    xmlns:qdt="urn:un:unece:uncefact:data:standard:QualifiedDataType:100"
+    xmlns:ram="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100"
+    xmlns:udt="urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100"
+    targetNamespace="urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100"
+    elementFormDefault="qualified">
+  <xs:import namespace="urn:un:unece:uncefact:data:standard:QualifiedDataType:100" schemaLocation="zugferd2p0_basicwl_minimum_urn_un_unece_uncefact_data_standard_QualifiedDataType_100.xsd"/>
+  <xs:import namespace="urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100" schemaLocation="zugferd2p0_basicwl_minimum_urn_un_unece_uncefact_data_standard_ReusableAggregateBusinessInformationEntity_100.xsd"/>
+  <xs:import namespace="urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100" schemaLocation="zugferd2p0_basicwl_minimum_urn_un_unece_uncefact_data_standard_UnqualifiedDataType_100.xsd"/>
+  <xs:element name="CrossIndustryInvoice" type="rsm:CrossIndustryInvoiceType"/>
+  <xs:complexType name="CrossIndustryInvoiceType">
+    <xs:sequence>
+      <xs:element name="ExchangedDocumentContext" type="ram:ExchangedDocumentContextType"/>
+      <xs:element name="ExchangedDocument" type="ram:ExchangedDocumentType"/>
+      <xs:element name="SupplyChainTradeTransaction" type="ram:SupplyChainTradeTransactionType"/>
+    </xs:sequence>
+  </xs:complexType>
+</xs:schema>