[APPS-3242] Fix for facet query for elasticsearch (#3260)

Co-authored-by: mohit-singh4 <mohit.singh@contractors.hyland.com>

packaging/tests/tas-restapi/src/test/java/org/alfresco/rest/nodes/NodeSizeDetailsTests.java

@@ -96,6 +96,45 @@ public class NodeSizeDetailsTests extends RestTest
                 });
     }
 
+    /**
+     * calculateNodeSizeForEmptyFolder testcase
+     */
+    @TestRail(section = {TestGroup.REST_API, TestGroup.NODES}, executionType = ExecutionType.SANITY)
+    @Test(groups = {TestGroup.REST_API, TestGroup.NODES, TestGroup.SANITY})
+    public void calculateNodeSizeForEmptyFolder() throws Exception
+    {
+
+        STEP("1. Create a folder in the test site.");
+        folder = dataContent.usingUser(user1).usingSite(siteModel).createFolder(FolderModel.getRandomFolderModel());
+
+        RestSizeDetailsModel restSizeDetailsModel = restClient.authenticateUser(user1).withCoreAPI().usingNode(folder).executeSizeDetails();
+        restClient.assertStatusCodeIs(HttpStatus.ACCEPTED);
+        restSizeDetailsModel.assertThat().field("jobId").isNotEmpty();
+
+        jobId = restSizeDetailsModel.getJobId();
+
+        STEP("2. Wait for 5 seconds for the processing to complete.");
+        Awaitility
+                .await()
+                .atMost(Duration.ofSeconds(5))
+                .pollInterval(Durations.ONE_SECOND)
+                .ignoreExceptions()
+                .untilAsserted(() -> {
+                    RestSizeDetailsModel sizeDetailsModel = restClient.authenticateUser(user1)
+                            .withCoreAPI()
+                            .usingNode(folder)
+                            .getSizeDetails(jobId);
+                    restClient.assertStatusCodeIs(HttpStatus.OK);
+                    sizeDetailsModel.assertThat()
+                            .field("sizeInBytes")
+                            .isNotEmpty();
+                    Assert.assertEquals(sizeDetailsModel.getSizeInBytes(), 0,
+                            "Value of sizeInBytes should be 0 " + sizeDetailsModel.getSizeInBytes());
+                    Assert.assertEquals(sizeDetailsModel.getStatus().name(), "COMPLETED",
+                            "Status should be - COMPLETED" + sizeDetailsModel.getStatus().name());
+                });
+    }
+
     /**
      * checkJobIdPresentInCache testcase
      */

repository/src/main/java/org/alfresco/repo/node/sizedetails/NodeSizeDetailsServiceImpl.java

@@ -58,6 +58,7 @@ public class NodeSizeDetailsServiceImpl implements NodeSizeDetailsService, Initi
     private static final Logger LOG = LoggerFactory.getLogger(NodeSizeDetailsServiceImpl.class);
     private static final String FIELD_FACET = "content.size";
     private static final String FACET_QUERY = "{!afts}content.size:[0 TO " + Integer.MAX_VALUE + "]";
+    private static final int DEFAULT_FACET_LIMIT = 100;
     private SearchService searchService;
     private SimpleCache<Serializable, NodeSizeDetails> simpleCache;
     private TransactionService transactionService;
@@ -214,7 +215,11 @@ public class NodeSizeDetailsServiceImpl implements NodeSizeDetailsService, Initi
             }
             searchParameters.addFacetQuery(FACET_QUERY);
             FieldFacet fieldFacet = new FieldFacet(FIELD_FACET);
-            fieldFacet.setLimitOrNull((int) resultsWithoutFacet.getNumberFound());
+            int numberFound = Optional.ofNullable(resultsWithoutFacet.getNumberFound())
+                    .map(Long::intValue)
+                    .filter(n -> n > 0)
+                    .orElse(DEFAULT_FACET_LIMIT);
+            fieldFacet.setLimitOrNull(numberFound);
             searchParameters.addFieldFacet(fieldFacet);
             resultsWithoutFacet.close();
             return searchService.query(searchParameters);