6570730: com.sun.source.tree.ModifiersTree.getFlags() should return class type

Reviewed-by: mcimadamore

langtools/src/share/classes/com/sun/source/tree/Tree.java

@@ -94,7 +94,7 @@ public interface Tree {
         CATCH(CatchTree.class),
 
         /**
-         * Used for instances of {@link ClassTree}.
+         * Used for instances of {@link ClassTree} representing classes.
          */
         CLASS(ClassTree.class),
 
@@ -557,6 +557,21 @@ public interface Tree {
          */
         ERRONEOUS(ErroneousTree.class),
 
+        /**
+         * Used for instances of {@link ClassTree} representing interfaces.
+         */
+        INTERFACE(ClassTree.class),
+
+        /**
+         * Used for instances of {@link ClassTree} representing enums.
+         */
+        ENUM(ClassTree.class),
+
+        /**
+         * Used for instances of {@link ClassTree} representing annotation types.
+         */
+        ANNOTATION_TYPE(ClassTree.class),
+
         /**
          * An implementation-reserved node. This is the not the node
          * you are looking for.

langtools/src/share/classes/com/sun/tools/javac/tree/JCTree.java

@@ -340,6 +340,7 @@ public abstract class JCTree implements Tree, Cloneable, DiagnosticPosition {
     public abstract int getTag();
 
     /** Convert a tree to a pretty-printed string. */
+    @Override
     public String toString() {
         StringWriter s = new StringWriter();
         try {
@@ -375,6 +376,7 @@ public abstract class JCTree implements Tree, Cloneable, DiagnosticPosition {
 
     /** Return a shallow copy of this tree.
      */
+    @Override
     public Object clone() {
         try {
             return super.clone();
@@ -587,7 +589,17 @@ public abstract class JCTree implements Tree, Cloneable, DiagnosticPosition {
         @Override
         public void accept(Visitor v) { v.visitClassDef(this); }
 
-        public Kind getKind() { return Kind.CLASS; }
+        public Kind getKind() {
+            if ((mods.flags & Flags.ANNOTATION) != 0)
+                return Kind.ANNOTATION_TYPE;
+            else if ((mods.flags & Flags.INTERFACE) != 0)
+                return Kind.INTERFACE;
+            else if ((mods.flags & Flags.ENUM) != 0)
+                return Kind.ENUM;
+            else
+                return Kind.CLASS;
+        }
+
         public JCModifiers getModifiers() { return mods; }
         public Name getSimpleName() { return name; }
         public List<JCTypeParameter> getTypeParameters() {

langtools/test/tools/javac/tree/ClassTreeTest.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2010, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6570730
+ * @summary com.sun.source.tree.ModifiersTree.getFlags() should return class type
+ */
+
+import java.io.*;
+import java.util.*;
+import javax.tools.*;
+import com.sun.source.tree.*;
+import com.sun.source.util.*;
+import com.sun.tools.javac.api.*;
+
+public class ClassTreeTest {
+    public static void main(String... args) throws Exception {
+        new ClassTreeTest().run();
+    }
+
+    void run() throws Exception {
+        JavacTool tool = JavacTool.create();
+        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
+        List<String> opts = Collections.<String>emptyList();
+        File testSrc = new File(System.getProperty("test.src"));
+        File thisFile = new File(testSrc, ClassTreeTest.class.getSimpleName() + ".java");
+        Iterable<? extends JavaFileObject> fos = fm.getJavaFileObjects(thisFile);
+        JavacTask task = tool.getTask(null, fm, null, opts, null, fos);
+        for (CompilationUnitTree cu: task.parse()) {
+            check(cu, "CLASS", Tree.Kind.CLASS);
+            check(cu, "INTERFACE", Tree.Kind.INTERFACE);
+            check(cu, "ENUM", Tree.Kind.ENUM);
+            check(cu, "ANNOTATION_TYPE", Tree.Kind.ANNOTATION_TYPE);
+        }
+
+        int expected = 4;
+        if (checks != expected)
+            error("Unexpected number of checks performed; expected: " + expected + ", found: " + checks);
+
+        if (errors > 0)
+            throw new Exception(errors + " errors found");
+    }
+
+    void check(CompilationUnitTree cu, String name, Tree.Kind k) {
+        checks++;
+
+        TreeScanner<ClassTree,String> s = new TreeScanner<ClassTree,String>() {
+            @Override
+            public ClassTree visitClass(ClassTree c, String name) {
+                if (c.getSimpleName().toString().equals(name))
+                    return c;
+                else
+                    return super.visitClass(c, name);
+            }
+
+            @Override
+            public ClassTree reduce(ClassTree t1, ClassTree t2) {
+                return (t1 != null ? t1 : t2);
+            }
+        };
+
+        ClassTree c = s.scan(cu, name);
+        if (c == null)
+            error("Can't find node named " + name);
+        else if (c.getKind() != k)
+            error("Unexpected kind for node named " + name + ": expected: " + k + ", found: " + c.getKind());
+    }
+
+    void error(String msg) {
+        System.err.println("Error: " + msg);
+        errors++;
+    }
+
+    int checks;
+    int errors;
+
+    class CLASS { }
+    interface INTERFACE { }
+    enum ENUM { }
+    @interface ANNOTATION_TYPE { }
+}

langtools/test/tools/javac/tree/TreeKindTest.java

@@ -29,7 +29,7 @@
 
 import com.sun.source.tree.*;
 
-public class T6341023 {
+public class TreeKindTest{
     public static void main(String... args) {
         boolean ok = true;
 
@@ -101,6 +101,13 @@ public class T6341023 {
                 ok = ok & verify(k, i, i == WildcardTree.class);
                 break;
 
+            case INTERFACE:
+            case ANNOTATION_TYPE:
+            case ENUM:
+            case CLASS:
+                ok = ok & verify(k, i, i == ClassTree.class);
+                break;
+
             case OTHER:
                 ok = ok & verify(k, i, i == null);
                 break;