Add basic structure of the aasx-validator

Author: weissarn

dataformat-aasx/src/main/java/io/adminshell/aas/v3/dataformat/aasx/AASXDeserializer.java

@@ -90,7 +90,7 @@ public AssetAdministrationShellEnvironment read() throws InvalidFormatException,
      * @throws InvalidFormatException
      * @throws IOException
      */
-    private String getXMLResourceString(OPCPackage aasxPackage) throws InvalidFormatException, IOException {
+    public String getXMLResourceString(OPCPackage aasxPackage) throws InvalidFormatException, IOException {
 
         // Get the "/aasx/aasx-origin" Part. It is Relationship source for the
         // XML-Document

dataformat-aasx/src/main/java/io/adminshell/aas/v3/dataformat/aasx/AASXValidator.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2021 Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.adminshell.aas.v3.dataformat.aasx;
+
+import io.adminshell.aas.v3.dataformat.xml.XmlSchemaValidator;
+import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
+import org.apache.poi.openxml4j.opc.OPCPackage;
+import org.xml.sax.SAXException;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Set;
+
+public class AASXValidator {
+
+    private XmlSchemaValidator xmlValidator;
+    private AASXDeserializer deserializer;
+
+    public AASXValidator(InputStream is) throws SAXException, IOException, InvalidFormatException {
+        this.xmlValidator = new XmlSchemaValidator();
+        this.deserializer = new AASXDeserializer(is);
+    }
+
+    public Set<String> validateSchema(OPCPackage p) throws IOException, InvalidFormatException {
+        String file = deserializer.getXMLResourceString(p);
+        return xmlValidator.validateSchema(file);
+    }
+
+}