8076583: move jdk.Exported from langtools to jdk

Reviewed-by: darcy, alanb, tbell, mchung, jlahoda

jdk/src/java.base/share/classes/jdk/Exported.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 jdk;
+
+import java.lang.annotation.*;
+
+/**
+  * Indicates whether or not a JDK specific type or package is an
+  * exported part of the JDK suitable for use outside of the JDK
+  * implementation itself.
+  *
+  * This annotation should only be applied to types and packages
+  * <em>outside</em> of the Java SE namespaces of {@code java.*} and
+  * {@code javax.*} packages.  For example, certain portions of {@code
+  * com.sun.*} are official parts of the JDK meant to be generally
+  * usable while other portions of {@code com.sun.*} are not.  This
+  * annotation type allows those portions to be easily and
+  * programmatically distinguished.
+  *
+  * <p>If in one release a type or package is
+  * <code>@Exported(true)</code>, in a subsequent major release such a
+  * type or package can transition to <code>@Exported(false)</code>.
+  *
+  * <p>If a type or package is <code>@Exported(false)</code> in a
+  * release, it may be removed in a subsequent major release.
+  *
+  * <p>If a top-level type has an <code>@Exported</code> annotation,
+  * any nested member types with the top-level type should have an
+  * <code>@Exported</code> annotation with the same value.
+  *
+  * (In exceptional cases, if a nested type is going to be removed
+  * before its enclosing type, the nested type's could be
+  * <code>@Exported(false)</code> while its enclosing type was
+  * <code>@Exported(true)</code>.)
+  *
+  * Likewise, if a package has an <code>@Exported</code> annotation,
+  * top-level types within that package should also have an
+  * <code>@Exported</code> annotation.
+  *
+  * Sometimes a top-level type may have a different
+  * <code>@Exported</code> value than its package.
+  *
+  * @since 1.8
+  */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE, ElementType.PACKAGE})
+@Exported
+public @interface Exported {
+    /**
+     * Whether or not the annotated type or package is an exported
+     * part of the JDK.
+     * @return whether or not the annotated type or package is an exported
+     * part of the JDK
+     */
+    boolean value() default true;
+}