/*

 * Copyright (c) 2015, 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.

 */

/**

 * @test

 * @bug 8072480

 * @summary Unit test for CreateSymbols

 * @clean *

 * @run main CreateSymbolsTest

 */

import java.io.IOException;

import java.net.URL;

import java.net.URLClassLoader;

import java.nio.file.FileVisitResult;

import java.nio.file.FileVisitor;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.attribute.BasicFileAttributes;

import java.util.Arrays;

import javax.tools.JavaCompiler;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

public class CreateSymbolsTest {

    static final String CREATE_SYMBOLS_NAME = "symbolgenerator.CreateSymbols";

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

        new CreateSymbolsTest().doRun();

    }

    void doRun() throws Exception {

        Path testClasses = Paths.get(System.getProperty("test.classes"));

        Path compileDir = testClasses.resolve("data");

        deleteRecursively(compileDir);

        Files.createDirectories(compileDir);

        Path createSymbols = findFile("../../make/src/classes/build/tools/symbolgenerator/CreateSymbols.java");

        if (createSymbols == null) {

            System.err.println("Warning: cannot find CreateSymbols, skipping.");

            return ;

        }

        Path createTestImpl = findFile("../../make/test/sym/CreateSymbolsTestImpl.java");

        if (createTestImpl == null) {

            System.err.println("Warning: cannot find CreateSymbolsTestImpl, skipping.");

            return ;

        }

        Path toolBox = findFile("../../test/tools/lib/ToolBox.java");

        if (toolBox == null) {

            System.err.println("Warning: cannot find ToolBox, skipping.");

            return ;

        }

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) {

            compiler.getTask(null,

                             null,

                             null,

                             Arrays.asList("-d", compileDir.toAbsolutePath().toString()),

                             null,

                             fm.getJavaFileObjects(createSymbols, createTestImpl, toolBox)

                            ).call();

        }

        URLClassLoader cl = new URLClassLoader(new URL[] {testClasses.toUri().toURL(), compileDir.toUri().toURL()});

        Class<?> createSymbolTest = cl.loadClass("CreateSymbolsTestImpl");

        createSymbolTest.getMethod("main", String[].class).invoke(null, (Object) new String[0]);

    }

    Path findFile(String path) {

        Path testSrc = Paths.get(System.getProperty("test.src", "."));

        for (Path d = testSrc; d != null; d = d.getParent()) {

            if (Files.exists(d.resolve("TEST.ROOT"))) {

                Path createSymbols = d.resolve(path);

                if (Files.exists(createSymbols)) {

                    return createSymbols;

                }

            }

        }

        return null;

    }

    void deleteRecursively(Path dir) throws IOException {

        Files.walkFileTree(dir, new FileVisitor<Path>() {

            @Override

            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {

                return FileVisitResult.CONTINUE;

            }

            @Override public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {

                Files.delete(file);

                return FileVisitResult.CONTINUE;

            }

            @Override public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {

                return FileVisitResult.CONTINUE;

            }

            @Override public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {

                Files.delete(dir);

                return FileVisitResult.CONTINUE;

            }

        });

    }

}