- added truncated getErrors() to workaround Rosetta Issue...

- added truncated getErrors() to workaround Rosetta Issue https://support.proquest.com/500Do0000083LJkIAM,
- closes #8

java/org/slub/rosetta/dps/repository/plugin/SLUBMatroskaFFV1FormatValidationPlugin.java

@@ -248,7 +248,22 @@ public class SLUBMatroskaFFV1FormatValidationPlugin implements FormatValidationP
 
     @Override
     public final List<String> getErrors() {
-        return List.copyOf(this.validationLog);
+        List<String> truncated = new ArrayList<String>();
+        int chars=0;
+        /* workaround for Rosetta Issue https://support.proquest.com/500Do0000083LJkIAM
+         * truncate to ensure not more than 2000 chars used, to
+         */
+        for (String e: validationLog) {
+            if ( (chars+ e.length()) < 1900 ) {
+                truncated.add( e );
+                chars+=e.length()+1; // +1 for line ending
+            } else {
+                truncated.add ("... (the full error is truncated, because Rosetta limits, see Rosetta log for detailed output)");
+                log.info("truncated errors in getError");
+                break;
+            }
+        }
+        return truncated;
     }
 
     @Override