src/jdk.compiler/share/classes/com/sun/tools/javac/util/DefinedBy.java

/*
 * 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.  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
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package com.sun.tools.javac.util;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**Methods that directly implement a method declared in a public, supported API should be marked
 * with this annotation.
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.SOURCE)
public @interface DefinedBy {

    /**The API which defines the implemented method.
     */
    Api value();

    public enum Api {
        ANNOTATION_PROCESSING("javax.annotation.processing"),
        COMPILER("javax.tools"),
        COMPILER_TREE("com.sun.source"),
        LANGUAGE_MODEL("javax.lang.model");

        /**The package under which all interfaces/classes of this API belong.
         */
        public final String packageRoot;

        private Api(String packageRoot) {
            this.packageRoot = packageRoot;
        }

    }
}