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 * Copyright (c) 2014, 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.

 *

 * 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.

 *

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 */

/*

 * @test

 * @bug 8037085

 * @summary Ensures that sjavac can handle various exclusion patterns.

 *

 * @library /tools/lib

 * @run main Wrapper IncludeExcludePatterns

 */

import java.io.File;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.Arrays;

import java.util.Collection;

import java.util.HashSet;

import java.util.Set;

import java.util.stream.Collectors;

import java.util.stream.Stream;

public class IncludeExcludePatterns extends SjavacBase {

    final Path SRC = Paths.get("src");

    final Path BIN = Paths.get("bin");

    final Path STATE_DIR = Paths.get("state-dir");

    // An arbitrarily but sufficiently complicated source tree.

    final Path A = Paths.get("pkga/A.java");

    final Path X1 = Paths.get("pkga/subpkg/Xx.java");

    final Path Y = Paths.get("pkga/subpkg/subsubpkg/Y.java");

    final Path B = Paths.get("pkgb/B.java");

    final Path C = Paths.get("pkgc/C.java");

    final Path X2 = Paths.get("pkgc/Xx.java");

    final Path[] ALL_PATHS = {A, X1, Y, B, C, X2};

    public static void main(String[] ignore) throws Exception {

        new IncludeExcludePatterns().runTest();

    }

    public void runTest() throws IOException, ReflectiveOperationException {

        Files.createDirectories(BIN);

        Files.createDirectories(STATE_DIR);

        for (Path p : ALL_PATHS) {

            writeDummyClass(p);

        }

        // Single file

        testPattern("pkga/A.java", A);

        // Leading wild cards

        testPattern("*/A.java", A);

        testPattern("**/Xx.java", X1, X2);

        testPattern("**x.java", X1, X2);

        // Wild card in middle of path

        testPattern("pkga/*/Xx.java", X1);

        testPattern("pkga/**/Y.java", Y);

        // Trailing wild cards

        testPattern("pkga/*", A);

        testPattern("pkga/**", A, X1, Y);

        // Multiple wildcards

        testPattern("pkga/*/*/Y.java", Y);

        testPattern("**/*/**", X1, Y);

    }

    // Given "src/pkg/subpkg/A.java" this method returns "A"

    String classNameOf(Path javaFile) {

        return javaFile.getFileName()

                       .toString()

                       .replace(".java", "");

    }

    // Puts an empty (dummy) class definition in the given path.

    void writeDummyClass(Path javaFile) throws IOException {

        String pkg = javaFile.getParent().toString().replace(File.separatorChar, '.');

        String cls = javaFile.getFileName().toString().replace(".java", "");

        toolbox.writeFile(SRC.resolve(javaFile), "package " + pkg + "; class " + cls + " {}");

    }

    void testPattern(String filterArgs, Path... sourcesExpectedToBeVisible)

            throws ReflectiveOperationException, IOException {

        testFilter("-i " + filterArgs, Arrays.asList(sourcesExpectedToBeVisible));

        Set<Path> complement = new HashSet<>(Arrays.asList(ALL_PATHS));

        complement.removeAll(Arrays.asList(sourcesExpectedToBeVisible));

        testFilter("-x " + filterArgs, complement);

    }

    void testFilter(String filterArgs, Collection<Path> sourcesExpectedToBeVisible)

            throws IOException, ReflectiveOperationException {

        System.out.println("Testing filter: " + filterArgs);

        toolbox.cleanDirectory(BIN);

        toolbox.cleanDirectory(STATE_DIR);

        String args = filterArgs + " " + SRC

                + " -d " + BIN

                + " --state-dir=" + STATE_DIR;

        int rc = compile((Object[]) args.split(" "));

        // Compilation should always pass in these tests

        Assert.check(rc == Result.OK.exitCode, "Compilation failed unexpectedly.");

        // The resulting .class files should correspond to the visible source files

        Set<Path> result = allFilesInDir(BIN);

        Set<Path> expected = correspondingClassFiles(sourcesExpectedToBeVisible);

        if (!result.equals(expected)) {

            System.out.println("Result:");

            printPaths(result);

            System.out.println("Expected:");

            printPaths(expected);

            Assert.error("Test case failed: " + filterArgs);

        }

    }

    void printPaths(Collection<Path> paths) {

        paths.stream()

             .sorted()

             .forEachOrdered(p -> System.out.println("    " + p));

    }

    // Given "pkg/A.java, pkg/B.java" this method returns "bin/pkg/A.class, bin/pkg/B.class"

    Set<Path> correspondingClassFiles(Collection<Path> javaFiles) {

        return javaFiles.stream()

                        .map(javaFile -> javaFile.resolveSibling(classNameOf(javaFile) + ".class"))

                        .map(BIN::resolve)

                        .collect(Collectors.toSet());

    }

    Set<Path> allFilesInDir(Path p) throws IOException {

        try (Stream<Path> files = Files.walk(p).filter(Files::isRegularFile)) {

            return files.collect(Collectors.toSet());

        }

    }

}