8029143: javadoc standard doclet should add Functional Interface blurb when @FunctionalInterface annotation is present

Reviewed-by: ksrini

langtools/src/share/classes/com/sun/javadoc/ClassDoc.java

@@ -74,15 +74,6 @@ public interface ClassDoc extends ProgramElementDoc, Type {
      */
     boolean isExternalizable();
 
-    /**
-     * Return true if this class can be used as a target type of a lambda expression
-     * or method reference.
-     *
-     * @return true if this class can be used as a target type of a lambda expression
-     *         or method reference.
-     */
-    boolean isFunctionalInterface();
-
     /**
      * Return the serialization methods for this class or
      * interface.

langtools/src/share/classes/com/sun/tools/doclets/formats/html/ClassWriterImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, 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
@@ -29,6 +29,7 @@ import java.util.*;
 
 import com.sun.javadoc.*;
 import com.sun.tools.javac.jvm.Profile;
+import com.sun.tools.javadoc.RootDocImpl;
 import com.sun.tools.doclets.formats.html.markup.*;
 import com.sun.tools.doclets.internal.toolkit.*;
 import com.sun.tools.doclets.internal.toolkit.builders.*;
@@ -528,7 +529,7 @@ public class ClassWriterImpl extends SubWriterHolderWriter
      * {@inheritDoc}
      */
     public void addFunctionalInterfaceInfo (Content classInfoTree) {
-        if (classDoc.isFunctionalInterface()) {
+        if (isFunctionalInterface()) {
             Content dt = HtmlTree.DT(getResource("doclet.Functional_Interface"));
             Content dl = HtmlTree.DL(dt);
             Content dd = new HtmlTree(HtmlTag.DD);
@@ -538,6 +539,19 @@ public class ClassWriterImpl extends SubWriterHolderWriter
         }
     }
 
+    public boolean isFunctionalInterface() {
+        if (configuration.root instanceof RootDocImpl) {
+            RootDocImpl root = (RootDocImpl) configuration.root;
+            AnnotationDesc[] annotationDescList = classDoc.annotations();
+            for (AnnotationDesc annoDesc : annotationDescList) {
+                if (root.isFunctionalInterface(annoDesc)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
     /**
      * {@inheritDoc}
      */

langtools/src/share/classes/com/sun/tools/javadoc/ClassDocImpl.java

@@ -288,10 +288,6 @@ public class ClassDocImpl extends ProgramElementDocImpl implements ClassDoc {
         return false;
     }
 
-    public boolean isFunctionalInterface() {
-        return env.types.isFunctionalInterface(tsym) && env.source.allowLambda();
-    }
-
     /**
      * Return the package that this class is contained in.
      */

langtools/src/share/classes/com/sun/tools/javadoc/RootDocImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, 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
@@ -381,6 +381,11 @@ public class RootDocImpl extends DocImpl implements RootDoc {
         env.initDoclint(opts, customTagNames);
     }
 
+    public boolean isFunctionalInterface(AnnotationDesc annotationDesc) {
+        return annotationDesc.annotationType().qualifiedName().equals(
+                env.syms.functionalInterfaceType.toString()) && env.source.allowLambda();
+    }
+
     public boolean showTagMessages() {
         return env.showTagMessages();
     }

langtools/test/com/sun/javadoc/testLambdaFeature/TestLambdaFeature.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2014, 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
@@ -23,7 +23,7 @@
 
 /*
  * @test
- * @bug      8004893 8022738
+ * @bug      8004893 8022738 8029143
  * @summary  Make sure that the lambda feature changes work fine in
  *           javadoc.
  * @author   bpatel
@@ -87,6 +87,11 @@ public class TestLambdaFeature extends JavadocTester {
             "<pre>default&nbsp;default&nbsp;void&nbsp;defaultMethod()</pre>"},
         {BUG_ID + FS + "pkg" + FS + "B.html",
             "<td class=\"colFirst\"><code>default void</code></td>"},
+        {BUG_ID + FS + "pkg1" + FS + "NotAFuncInf.html",
+            "<dl>" + NL + "<dt>Functional Interface:</dt>" + NL +
+            "<dd>This is a functional interface and can therefore be used as " +
+            "the assignment target for a lambda expression or method " +
+            "reference.</dd>" + NL + "</dl>"},
         {BUG_ID + FS + "pkg" + FS + "B.html",
             "<dl>" + NL + "<dt>Functional Interface:</dt>"}
     };

langtools/test/com/sun/javadoc/testLambdaFeature/pkg/A.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2014, 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
@@ -23,6 +23,7 @@
 
 package pkg;
 
+@FunctionalInterface
 public interface A {
 
     public void method1();

langtools/test/com/sun/javadoc/testLambdaFeature/pkg1/FuncInf.java

@@ -23,6 +23,7 @@
 
 package pkg1;
 
+@FunctionalInterface
 public interface FuncInf<V> {
 
     V call() throws Exception;

langtools/test/com/sun/javadoc/testLambdaFeature/pkg1/NotAFuncInf.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2014, 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.
+ */
+
+package pkg1;
+
+public interface NotAFuncInf<V> {
+
+    V call() throws Exception;
+}