fixes elastic#40405, fixed ignoring name parameter for percolator queries

Author: gurkankaymak

modules/percolator/src/main/java/org/elasticsearch/percolator/PercolateQueryBuilder.java

@@ -178,7 +178,7 @@ public PercolateQueryBuilder(String field, String documentType, List<BytesRefere
         this.documentSupplier = null;
     }
 
-    private PercolateQueryBuilder(String field, String documentType, Supplier<BytesReference> documentSupplier) {
+    protected PercolateQueryBuilder(String field, String documentType, Supplier<BytesReference> documentSupplier) {
         if (field == null) {
             throw new IllegalArgumentException("[field] is a required argument");
         }
@@ -491,8 +491,12 @@ protected QueryBuilder doRewrite(QueryRewriteContext queryShardContext) {
             if (source == null) {
                 return this; // not executed yet
             } else {
-                return new PercolateQueryBuilder(field, documentType, Collections.singletonList(source),
-                    XContentHelper.xContentType(source));
+                PercolateQueryBuilder rewritten = new PercolateQueryBuilder(field, documentType,
+                    Collections.singletonList(source), XContentHelper.xContentType(source));
+                if (name != null) {
+                    rewritten.setName(name);
+                }
+                return rewritten;
             }
         }
         GetRequest getRequest;
@@ -527,7 +531,12 @@ protected QueryBuilder doRewrite(QueryRewriteContext queryShardContext) {
                 listener.onResponse(null);
             }, listener::onFailure));
         });
-        return new PercolateQueryBuilder(field, documentType, documentSupplier::get);
+
+        PercolateQueryBuilder rewritten = new PercolateQueryBuilder(field, documentType, documentSupplier::get);
+        if (name != null) {
+            rewritten.setName(name);
+        }
+        return rewritten;
     }
 
     @Override
@@ -626,6 +635,10 @@ XContentType getXContentType() {
         return documentXContentType;
     }
 
+    public String getQueryName() {
+        return name;
+    }
+
     static IndexSearcher createMultiDocumentSearcher(Analyzer analyzer, Collection<ParsedDocument> docs) {
         RAMDirectory ramDirectory = new RAMDirectory();
         try (IndexWriter indexWriter = new IndexWriter(ramDirectory, new IndexWriterConfig(analyzer))) {

modules/percolator/src/test/java/org/elasticsearch/percolator/PercolateQueryBuilderTests.java

@@ -54,6 +54,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.Supplier;
 
 import static org.elasticsearch.index.seqno.SequenceNumbers.UNASSIGNED_SEQ_NO;
 import static org.hamcrest.Matchers.equalTo;
@@ -331,4 +332,29 @@ public void testFieldAlias() throws IOException {
         assertEquals(query.getVerifiedMatchesQuery(), aliasQuery.getVerifiedMatchesQuery());
     }
 
+    public void testSettingNameWhileRewriting() {
+        String testName = "name1";
+        QueryShardContext shardContext = createShardContext();
+        PercolateQueryBuilder percolateQueryBuilder = doCreateTestQueryBuilder(true);
+        percolateQueryBuilder.setName(testName);
+
+        QueryBuilder rewrittenQueryBuilder = percolateQueryBuilder.doRewrite(shardContext);
+
+        assertEquals(testName, ((PercolateQueryBuilder) rewrittenQueryBuilder).getQueryName());
+        assertNotEquals(rewrittenQueryBuilder, percolateQueryBuilder);
+    }
+
+    public void testSettingNameWhileRewritingWhenDocumentSupplierAndSourceNotNull() {
+        Supplier<BytesReference> supplier = () -> new BytesArray("{\"test\": \"test\"}");
+        String testName = "name1";
+        QueryShardContext shardContext = createShardContext();
+        PercolateQueryBuilder percolateQueryBuilder = new PercolateQueryBuilder(queryField, null, supplier);
+        percolateQueryBuilder.setName(testName);
+
+        QueryBuilder rewrittenQueryBuilder = percolateQueryBuilder.doRewrite(shardContext);
+
+        assertEquals(testName, ((PercolateQueryBuilder) rewrittenQueryBuilder).getQueryName());
+        assertNotEquals(rewrittenQueryBuilder, percolateQueryBuilder);
+    }
+
 }