/*

 * Copyright (c) 2005, 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 javax.tools;

import javax.lang.model.element.NestingKind;

import javax.lang.model.element.Modifier;

import java.util.Objects;

/**

 * File abstraction for tools operating on Java™ programming language

 * source and class files.

 *

 * <p>All methods in this interface might throw a SecurityException if

 * a security exception occurs.

 *

 * <p>Unless explicitly allowed, all methods in this interface might

 * throw a NullPointerException if given a {@code null} argument.

 *

 * @author Peter von der Ahé

 * @author Jonathan Gibbons

 * @see JavaFileManager

 * @since 1.6

 */

public interface JavaFileObject extends FileObject {

    /**

     * Kinds of JavaFileObjects.

     */

    enum Kind {

        /**

         * Source files written in the Java programming language.  For

         * example, regular files ending with {@code .java}.

         */

        SOURCE(".java"),

        /**

         * Class files for the Java Virtual Machine.  For example,

         * regular files ending with {@code .class}.

         */

        CLASS(".class"),

        /**

         * HTML files.  For example, regular files ending with {@code

         * .html}.

         */

        HTML(".html"),

        /**

         * Any other kind.

         */

        OTHER("");

        /**

         * The extension which (by convention) is normally used for

         * this kind of file object.  If no convention exists, the

         * empty string ({@code ""}) is used.

         */

        public final String extension;

        private Kind(String extension) {

            this.extension = Objects.requireNonNull(extension);

        }

    }

    /**

     * Returns the kind of this file object.

     *

     * @return the kind

     */

    Kind getKind();

    /**

     * Checks if this file object is compatible with the specified

     * simple name and kind.  A simple name is a single identifier

     * (not qualified) as defined in

     * <cite>The Java&trade; Language Specification</cite>,

     * section 6.2 "Names and Identifiers".

     *

     * @param simpleName a simple name of a class

     * @param kind a kind

     * @return {@code true} if this file object is compatible; false

     * otherwise

     */

    boolean isNameCompatible(String simpleName, Kind kind);

    /**

     * Provides a hint about the nesting level of the class

     * represented by this file object.  This method may return

     * {@link NestingKind#MEMBER} to mean

     * {@link NestingKind#LOCAL} or {@link NestingKind#ANONYMOUS}.

     * If the nesting level is not known or this file object does not

     * represent a class file this method returns {@code null}.

     *

     * @return the nesting kind, or {@code null} if the nesting kind

     * is not known

     */

    NestingKind getNestingKind();

    /**

     * Provides a hint about the access level of the class represented

     * by this file object.  If the access level is not known or if

     * this file object does not represent a class file this method

     * returns {@code null}.

     *

     * @return the access level

     */

    Modifier getAccessLevel();

}