Fix FQS bundle filtering to be based on correct volume number

src/main/java/org/gesis/dda/filter/impl/Fqs2SsoarBundleFilter.java

@@ -5,28 +5,42 @@ import java.util.Set;
 import org.gesis.dda.filter.BundleFilter;
 import org.gesis.dda.publishing.domain.Bundle;
 import org.gesis.dda.publishing.domain.Metadatum;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class Fqs2SsoarBundleFilter implements BundleFilter {
     
+    private final static Logger LOG = LoggerFactory.getLogger(Fqs2SsoarBundleFilter.class);
+    
     /**
-     * SSOAR already has everything up to and including dc.source.volume=16 dc.source.issue=3 ->
-     * there are only three issues in volume=16 -> therefore: if volume <= 16, then filter away bundle
+     * SSOAR already has everything up to and including dc.source.volume=17 dc.source.issue=3 ->
+     * there are only three issues in volume=17 -> therefore: harvest everything starting with volume>=18
      */
     @Override
     public boolean test(Bundle bundle) {
+        
         boolean result;
         Set<Metadatum> metadata = bundle.getMetadata();
         Metadatum volume = metadata.stream().filter( m -> m.getKey().equals("dc.source.volume") ).findFirst().orElse(null);
         if (null != volume) {
             String volumeValueString = volume.getValue();
-            int volumeValue = Integer.parseInt(volumeValueString);
             
-            if ( volumeValue <= 16 ) {
-                result = false;
+            try {
+                int volumeValue = Integer.parseInt(volumeValueString);
+                
+                if ( volumeValue >= 18 ) {
+                    result = true;
+                }
+                else {
+                    LOG.info("filtering away bundle.reference={}", bundle.getReference() );
+                    result = false;
+                }
             }
-            else {
+            catch (NumberFormatException e) {
+                LOG.warn("unparsable dc.source.volume={} for bundle.reference={}", volumeValueString, bundle.getReference() );
                 result = true;
             }
+            
         }
         else {
             result = true;