Validierung des Metadaten Schemas

• Fügt dem Sender eine Prüfung der Metadaten gegen ein Schema hinzu (der Subscriber hatte bisher schon eine Schemavalidierung durchgeführt)
• Die angekündigte Einreichung wird zurückgewiesen wenn die Metadaten nicht schemakonform sind
• Abbruch des sendens mit einem leeren Ergebnis

client/src/main/java/de/fitko/fitconnect/client/SenderClient.java

@@ -45,8 +45,8 @@ public class SenderClient {
     private SenderClient() {
     }
 
-    public static WithDestination build(final Sender sender) {
-        return new ClientBuilder(sender);
+    public static WithDestination build(final Sender sender, final String metadataSchema) {
+        return new ClientBuilder(sender, metadataSchema);
     }
 
     public interface WithDestination {
@@ -159,10 +159,12 @@ public class SenderClient {
         private DataPayload dataPayload;
         private UUID destinationId;
         private ServiceType serviceType;
+        private final String metadataSchema;
         private List<File> attachments = new ArrayList<>();
 
-        public ClientBuilder(final Sender sender) {
+        public ClientBuilder(final Sender sender, final String metadataSchema) {
             this.sender = sender;
+            this.metadataSchema = metadataSchema;
         }
 
         @Override
@@ -239,9 +241,16 @@ public class SenderClient {
 
                 /** Set encrypted metadata with data payload and attachments  **/
                 logger.info("Adding data payload with mime-type {} to submission", this.dataPayload.mimeType);
-                final DataPayload data = getEncryptedData(this.dataPayload, destination, encryptionKey);
-                submission.setEncryptedData(data.getEncryptedData());
-                submission.setEncryptedMetadata(getEncryptedMetadata(encryptionKey, data, hashedAttachments));
+                final DataPayload dataToSend = getEncryptedData(this.dataPayload, destination, encryptionKey);
+                final Metadata metadata = createMetadata(hashedAttachments, dataToSend);
+                final ValidationResult validatedMetadata = sender.validateMetadata(metadata, metadataSchema);
+                if (validatedMetadata.hasError()) {
+                    logger.error("Metadata does not match schema", validatedMetadata.getError());
+                    sender.rejectSubmission(submissionId, destinationId, announcedSubmission.getCaseId());
+                    return Optional.empty();
+                }
+                submission.setEncryptedData(dataToSend.getEncryptedData());
+                submission.setEncryptedMetadata(sender.encryptObject(encryptionKey, metadata));
 
                 /** submit submission **/
                 sender.sendSubmission(submission);
@@ -277,11 +286,6 @@ public class SenderClient {
                     .withHashedData(hashedData);
         }
 
-        private String getEncryptedMetadata(final RSAKey encryptionKey, final DataPayload dataPayload, final List<Attachment> hashedAttachments) {
-            final Metadata metadata = createMetadata(hashedAttachments, dataPayload);
-            return sender.encryptObject(encryptionKey, metadata);
-        }
-
         private List<Attachment> toHashedAttachments(final List<AttachmentPayload> attachmentPayloads) {
             return attachmentPayloads.stream()
                     .map(this::toHashedAttachment)