8342707: Prepare Gatherers for graduation from Preview

Reviewed-by: alanb, liach

Author: Viktor Klang

src/java.base/share/classes/java/util/stream/Gatherer.java

@@ -24,7 +24,6 @@
  */
 package java.util.stream;
 
-import jdk.internal.javac.PreviewFeature;
 import jdk.internal.vm.annotation.ForceInline;
 
 import java.util.*;
@@ -195,9 +194,8 @@
  * @param <A> the potentially mutable state type of the gatherer operation
  *            (often hidden as an implementation detail)
  * @param <R> the type of output elements from the gatherer operation
- * @since 22
+ * @since 24
  */
-@PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
 public interface Gatherer<T, A, R> {
     /**
      * A function that produces an instance of the intermediate state used for
@@ -481,10 +479,9 @@ static <T, A, R> Gatherer<T, A, R> of(
      * A Downstream object is the next stage in a pipeline of operations,
      * to which elements can be sent.
      * @param <T> the type of elements this downstream accepts
-     * @since 22
+     * @since 24
      */
     @FunctionalInterface
-    @PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
     interface Downstream<T> {
 
         /**
@@ -524,10 +521,9 @@ interface Downstream<T> {
      * @param <A> the type of state used by this integrator
      * @param <T> the type of elements this integrator consumes
      * @param <R> the type of results this integrator can produce
-     * @since 22
+     * @since 24
      */
     @FunctionalInterface
-    @PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
     interface Integrator<A, T, R> {
         /**
          * Performs an action given: the current state, the next element, and
@@ -584,10 +580,9 @@ static <A, T, R> Greedy<A, T, R> ofGreedy(Greedy<A, T, R> greedy) {
          * @param <A> the type of state used by this integrator
          * @param <T> the type of elements this greedy integrator receives
          * @param <R> the type of results this greedy integrator can produce
-         * @since 22
+         * @since 24
          */
         @FunctionalInterface
-        @PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
         interface Greedy<A, T, R> extends Integrator<A, T, R> { }
     }
 }

src/java.base/share/classes/java/util/stream/GathererOp.java

@@ -45,7 +45,7 @@
  * The performance-critical code below contains some more complicated encodings:
  * therefore, make sure to run benchmarks to verify changes to prevent regressions.
  *
- * @since 22
+ * @since 24
  */
 final class GathererOp<T, A, R> extends ReferencePipeline<T, R> {
     @SuppressWarnings("unchecked")

src/java.base/share/classes/java/util/stream/Gatherers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,6 @@
 package java.util.stream;
 
 import jdk.internal.access.SharedSecrets;
-import jdk.internal.javac.PreviewFeature;
 import jdk.internal.vm.annotation.ForceInline;
 
 import java.util.ArrayDeque;
@@ -48,9 +47,8 @@
  * operations, such as windowing functions, folding functions,
  * transforming elements concurrently, etc.
  *
- * @since 22
+ * @since 24
 */
-@PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
 public final class Gatherers {
     private Gatherers() { } // This class is not intended to be instantiated
 

src/java.base/share/classes/java/util/stream/Stream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,8 +24,6 @@
  */
 package java.util.stream;
 
-import jdk.internal.javac.PreviewFeature;
-
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
@@ -1096,9 +1094,8 @@ <U> U reduce(U identity,
      * @param <R> The element type of the new stream
      * @param gatherer a gatherer
      * @return the new stream
-     * @since 22
+     * @since 24
      */
-    @PreviewFeature(feature = PreviewFeature.Feature.STREAM_GATHERERS)
     default <R> Stream<R> gather(Gatherer<? super T, ?, R> gatherer) {
         return StreamSupport.stream(spliterator(), isParallel())
                             .gather(gatherer)

src/java.base/share/classes/jdk/internal/javac/PreviewFeature.java

@@ -76,7 +76,6 @@ public enum Feature {
         STRUCTURED_CONCURRENCY,
         @JEP(number=466, title="ClassFile API", status="Second Preview")
         CLASSFILE_API,
-        @JEP(number=473, title="Stream Gatherers", status="Second Preview")
         STREAM_GATHERERS,
         @JEP(number=476, title="Module Import Declarations", status="Preview")
         MODULE_IMPORTS,

test/jdk/java/util/stream/GathererAPITest.java

@@ -35,7 +35,6 @@
 /**
  * @test
  * @summary Testing public API of Gatherer
- * @enablePreview
  * @run junit GathererAPITest
  */
 

test/jdk/java/util/stream/GathererShortCircuitTest.java

@@ -32,7 +32,6 @@
  * @test
  * @bug 8328316
  * @summary Testing Gatherer behavior under short circuiting
- * @enablePreview
  * @run junit GathererShortCircuitTest
  */
 

test/jdk/java/util/stream/GathererTest.java

@@ -37,7 +37,6 @@
 /**
  * @test
  * @summary Testing the Gatherer contract
- * @enablePreview
  * @library /lib/testlibrary/bootlib
  * @build java.base/java.util.stream.DefaultMethodStreams
  * @run junit GathererTest

test/jdk/java/util/stream/GatherersFoldTest.java

@@ -34,7 +34,6 @@
 /**
  * @test
  * @summary Tests the API and contract of Gatherers.fold
- * @enablePreview
  * @run junit GatherersFoldTest
  */
 

test/jdk/java/util/stream/GatherersMapConcurrentTest.java

@@ -38,7 +38,6 @@
 /**
  * @test
  * @summary Tests the API and contract of Gatherers.mapConcurrent
- * @enablePreview
  * @run junit GatherersMapConcurrentTest
  */