/*

 * Copyright (c) 2010, 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.

 */

/**

 * Utility and test program to check javac's internal TreeScanner class.

 * The program can be run standalone, or as a jtreg test.  For info on

 * command line args, run program with no args.

 *

 * <p>

 * jtreg: Note that by using the -r switch in the test description below, this test

 * will process all java files in the langtools/test directory, thus implicitly

 * covering any new language features that may be tested in this test suite.

 */

/*

 * @test

 * @bug 6923080

 * @summary TreeScanner.visitNewClass should scan tree.typeargs

 * @build AbstractTreeScannerTest JavacTreeScannerTest

 * @run main JavacTreeScannerTest -q -r .

 */

import java.io.*;

import java.lang.reflect.*;

import java.util.*;

import javax.tools.*;

import com.sun.tools.javac.tree.JCTree;

import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;

import com.sun.tools.javac.tree.TreeScanner;

import com.sun.tools.javac.util.List;

public class JavacTreeScannerTest extends AbstractTreeScannerTest {

    /**

     * Main entry point.

     * If test.src is set, program runs in jtreg mode, and will throw an Error

     * if any errors arise, otherwise System.exit will be used. In jtreg mode,

     * the default base directory for file args is the value of ${test.src}.

     * In jtreg mode, the -r option can be given to change the default base

     * directory to the root test directory.

     */

    public static void main(String... args) {

        String testSrc = System.getProperty("test.src");

        File baseDir = (testSrc == null) ? null : new File(testSrc);

        boolean ok = new JavacTreeScannerTest().run(baseDir, args);

        if (!ok) {

            if (testSrc != null)  // jtreg mode

                throw new Error("failed");

            else

                System.exit(1);

        }

    }

    int test(JCCompilationUnit tree) {

        return new ScanTester().test(tree);

    }

    /**

     * Main class for testing operation of tree scanner.

     * The set of nodes found by the scanner are compared

     * against the set of nodes found by reflection.

     */

    private class ScanTester extends TreeScanner {

        /** Main entry method for the class. */

        int test(JCCompilationUnit tree) {

            sourcefile = tree.sourcefile;

            found = new HashSet<JCTree>();

            scan(tree);

            expect = new HashSet<JCTree>();

            reflectiveScan(tree);

            if (found.equals(expect)) {

                return found.size();

            }

            if (found.size() != expect.size())

                error("Size mismatch; found: " + found.size() + ", expected: " + expect.size());

            Set<JCTree> missing = new HashSet<JCTree>();

            missing.addAll(expect);

            missing.removeAll(found);

            for (JCTree t: missing)

            Set<JCTree> excess = new HashSet<JCTree>();

            excess.addAll(found);

            excess.removeAll(expect);

            for (JCTree t: excess)

            return 0;

        }

        /** Record all tree nodes found by scanner. */

        @Override

        public void scan(JCTree tree) {

            if (tree == null)

                return;

            found.add(tree);

            super.scan(tree);

        }

        /** record all tree nodes found by reflection. */

        public void reflectiveScan(Object o) {

            if (o == null)

                return;

            if (o instanceof JCTree) {

                JCTree tree = (JCTree) o;

                expect.add(tree);

                for (Field f: getFields(tree)) {

                    try {

                        //System.err.println("FIELD: " + f.getName());

                        reflectiveScan(f.get(tree));

                    } catch (IllegalAccessException e) {

                        error(e.toString());

                    }

                }

            } else if (o instanceof List) {

                List<?> list = (List<?>) o;

                for (Object item: list)

                    reflectiveScan(item);

            } else

                error("unexpected item: " + o);

        }

        JavaFileObject sourcefile;

        Set<JCTree> found;

        Set<JCTree> expect;

    }

}