[GitHub] [jena] ajs6f commented on a change in pull request #707: JENA-1857: DatasetGraphInMemory.size.

[GitBox <gi...@apache.org>]

ajs6f commented on a change in pull request #707: JENA-1857: DatasetGraphInMemory.size.
URL: https://github.com/apache/jena/pull/707#discussion_r391703097
 
 

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 File path: jena-arq/src/main/java/org/apache/jena/sparql/core/mem/DatasetGraphInMemory.java
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 @@ -400,7 +400,9 @@ public DatasetPrefixStorage prefixes() {
 
     @Override
     public long size() {
-        return quadsIndex().listGraphNodes().count() ;
+        return isInTransaction() 
+                ? quadsIndex().listGraphNodes().count()
+                : calculateRead(this, ()->quadsIndex().listGraphNodes().count());
 
 Review comment:
   ```suggestion
                   : calculateRead(this, quadsIndex().listGraphNodes()::count);
   ```
   
   I just have a thing for point-free! :man_shrugging: 

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