[codeInsight] IDEA-238740 Support the jdk.internal.PreviewFeature annotation

This patch adds support of the jdk.internal.PreviewFeature annotation

Signed-off-by: Nikita Eshkeev <nikita.eshkeev@jetbrains.com>

GitOrigin-RevId: b2f56d62c3b12475690f667628811e5345b1d1cf

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/CallConstructorWithPreviewFeature.java

@@ -0,0 +1,20 @@
+import jdk.internal.PreviewFeature;
+import jdk.internal.PreviewFeature.Feature;
+
+class Main {
+  @PreviewFeature(feature=Feature.PATTERN_MATCHING_IN_INSTANCEOF)
+  Main(){}
+  @PreviewFeature(feature=Feature.RECORDS)
+  Main(long i){}
+  @PreviewFeature(feature=Feature.TEXT_BLOCKS)
+  Main(String s){}
+  Main(int i){}
+
+  static {
+    <error descr="Patterns in 'instanceof' are not supported at language level '8'">new Main()</error>;
+    <error descr="Records are not supported at language level '8'">new Main(42l)</error>;
+    <error descr="Text block literals are not supported at language level '8'">new Main("42")</error>;
+    new Main(42);
+  }
+
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/CallMethodsWithPreviewFeature.java

@@ -0,0 +1,20 @@
+import jdk.internal.PreviewFeature;
+import jdk.internal.PreviewFeature.Feature;
+
+class Main {
+  static {
+    <error descr="Patterns in 'instanceof' are not supported at language level '8'">requirePatternMatching()</error>;
+    <error descr="Text block literals are not supported at language level '8'">Main.requireTextBlocks()</error>;
+    <error descr="Records are not supported at language level '8'">new Main().requireRecords()</error>;
+  }
+
+  @PreviewFeature(feature=Feature.PATTERN_MATCHING_IN_INSTANCEOF)
+  static void requirePatternMatching(){}
+
+  @PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.TEXT_BLOCKS)
+  static void requireTextBlocks(){}
+
+  @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.RECORDS)
+  void requireRecords(){}
+
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/FieldsWithPreviewFeature.java

@@ -0,0 +1,22 @@
+import jdk.internal.PreviewFeature;
+import jdk.internal.PreviewFeature.Feature;
+
+class Main {
+  @PreviewFeature(feature=Feature.PATTERN_MATCHING_IN_INSTANCEOF)
+  static String instanceOf;
+  @PreviewFeature(feature=Feature.RECORDS)
+  static long records;
+  @PreviewFeature(feature=Feature.TEXT_BLOCKS)
+  String textBlocks;
+  int i;
+  <error descr="Patterns in 'instanceof' are not supported at language level '8'">org.myorg.preview.FromPreview</error> preview;
+
+  static {
+    String s = <error descr="Text block literals are not supported at language level '8'">new Main().textBlocks</error>;
+    String o = <error descr="Patterns in 'instanceof' are not supported at language level '8'">Main.instanceOf</error>;
+    long l = <error descr="Records are not supported at language level '8'">records</error>;
+    int k = new Main().i;
+    <error descr="Patterns in 'instanceof' are not supported at language level '8'">org.myorg.preview.FromPreview</error> local = null;
+  }
+
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/ImportWithPreviewFeature.java

@@ -0,0 +1,3 @@
+<error descr="Patterns in 'instanceof' are not supported at language level '8'">import org.myorg.preview.FromPreview;</error>
+
+class Main { }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/PreviewFeature.java

@@ -0,0 +1,26 @@
+package jdk.internal;
+
+import java.lang.annotation.*;
+
+@Target({ElementType.METHOD,
+  ElementType.CONSTRUCTOR,
+  ElementType.FIELD,
+  ElementType.PACKAGE,
+  ElementType.TYPE})
+@Retention(RetentionPolicy.CLASS)
+public @interface PreviewFeature {
+  /**
+   * Name of the preview feature the annotated API is associated
+   * with.
+   */
+  public Feature feature();
+
+  public boolean essentialAPI() default false;
+
+  public enum Feature {
+    PATTERN_MATCHING_IN_INSTANCEOF,
+    TEXT_BLOCKS,
+    RECORDS,
+    ;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/TypeWithPreviewFeature.java

@@ -0,0 +1,17 @@
+import jdk.internal.PreviewFeature;
+import jdk.internal.PreviewFeature.Feature;
+
+class Main {
+  @PreviewFeature(feature=Feature.PATTERN_MATCHING_IN_INSTANCEOF)
+  class InstanceOf{}
+  @PreviewFeature(feature=Feature.RECORDS)
+  class Records{}
+  @PreviewFeature(feature=Feature.TEXT_BLOCKS)
+  class TextBlocks{}
+  class Empty{}
+
+  private void f(<error descr="Patterns in 'instanceof' are not supported at language level '8'">InstanceOf</error> o, Empty e) {}
+  private void f(Empty e, <error descr="Records are not supported at language level '8'">Records</error> r) {}
+  private void f(<error descr="Text block literals are not supported at language level '8'">TextBlocks</error> e, <error descr="Records are not supported at language level '8'">Records</error> r) {}
+  private void f(<error descr="Patterns in 'instanceof' are not supported at language level '8'">org.myorg.preview.FromPreview</error> p) {}
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/packagepreview/FromPreview.java

@@ -0,0 +1,3 @@
+package org.myorg.preview;
+
+public interface FromPreview {}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/previewfeature/packagepreview/package-info.java

@@ -0,0 +1,2 @@
+@jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.PATTERN_MATCHING_IN_INSTANCEOF)
+package org.myorg.preview;