/*

 * Copyright (c) 2015, 2016, 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.javadoc.doclet;

import java.util.List;

import java.util.Set;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.Element;

import javax.lang.model.element.TypeElement;

import javax.lang.model.util.Elements;

import javax.lang.model.util.Types;

import javax.tools.JavaFileManager;

import com.sun.source.util.DocTrees;

/**

 * Represents the operating environment of a single invocation

 * of the doclet. This object can be used to access the program

 * structures, various utilities and the user specified elements

 * on the command line.

 *

 * @since 9

 */

public interface DocletEnvironment {

    /**

     * Returns the <a href="package-summary.html#included">included</a>

     *

     */

    /**

     * Returns an instance of the {@code DocTrees} utility class.

     * This class provides methods to access {@code TreePath}s, {@code DocCommentTree}s

     * and so on.

     */

    DocTrees getDocTrees();

    /**

     * Returns an instance of the {@code Elements} utility class.

     * This class provides methods for operating on

     * {@link javax.lang.model.element.Element elements}.

     * @return a utility class to operate on elements

     */

    Elements getElementUtils();

    /**

     *

     * @param elements those that need to be checked

     */

    List<Element> getSelectedElements(List<? extends Element> elements);

    /**

     * If {@code -subpackages} and {@code -exclude} options

     * are used, return all the non-excluded packages.

     *

     * @return elements specified on the command line.

     */

    Set<Element> getSpecifiedElements();

    /**

     * Returns an instance of the {@code Types} utility class.

     * This class provides methods for operating on

     * {@link javax.lang.model.type.TypeMirror type mirrors}.

     * @return a utility class to operate on type mirrors

     */

    Types getTypeUtils();

    /**

     * Indicates if an element is <a href="package-summary.html#included">included</a>.

     *

     * @param e the Element in question

     * @return true if included, false otherwise

     */

    boolean isIncluded(Element e);

    /**

     * Returns the file manager used to read and write files.

     *

     * @return the file manager used to read and write files

     */

    JavaFileManager getJavaFileManager();

    /**

     * Returns the source version of the source files that were read.

     *

     * @return the source version

     */

    SourceVersion getSourceVersion();

}