add weight.count optimization for no match

Signed-off-by: Sandesh Kumar <[email protected]>

Author: sandeshkr419

server/src/main/java/org/opensearch/search/aggregations/bucket/composite/CompositeAggregator.java

@@ -76,6 +76,7 @@
 import org.opensearch.search.aggregations.bucket.filterrewrite.CompositeAggregatorBridge;
 import org.opensearch.search.aggregations.bucket.filterrewrite.FilterRewriteOptimizationContext;
 import org.opensearch.search.aggregations.bucket.missing.MissingOrder;
+import org.opensearch.search.aggregations.bucket.terms.GlobalOrdinalsStringTermsAggregator;
 import org.opensearch.search.aggregations.bucket.terms.LongKeyedBucketOrds;
 import org.opensearch.search.internal.SearchContext;
 import org.opensearch.search.searchafter.SearchAfterBuilder;
@@ -119,6 +120,7 @@ public final class CompositeAggregator extends BucketsAggregator {
     private BucketCollector deferredCollectors;
 
     private boolean earlyTerminated;
+    private Weight weight;
 
     private final FilterRewriteOptimizationContext filterRewriteOptimizationContext;
     private LongKeyedBucketOrds bucketOrds;
@@ -566,9 +568,15 @@ private void processLeafFromQuery(LeafReaderContext ctx, Sort indexSortPrefix) t
             }
         }
     }
+    public void setWeight(Weight weight) {
+        this.weight = weight;
+    }
 
     @Override
     protected boolean tryPrecomputeAggregationForLeaf(LeafReaderContext ctx) throws IOException {
+        if (this.weight != null && this.weight.count(ctx) == 0) {
+            return true;
+        }
         finishLeaf(); // May need to wrap up previous leaf if it could not be precomputed
         return filterRewriteOptimizationContext.tryOptimize(
             ctx,