/*

 * Copyright (c) 2019, 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 8218152

 * @summary A bad annotation processor class file should fail with an error

 * @author Steven Groeger

 *

 * @library /tools/lib /tools/javac/lib

 * @modules

 *      jdk.compiler/com.sun.tools.javac.api

 *      jdk.compiler/com.sun.tools.javac.main

 * @build toolbox.ToolBox toolbox.JavacTask JavacTestingAbstractProcessor

 * @run main MalformedAnnotationProcessorTests

 */

import java.io.RandomAccessFile;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.List;

import javax.annotation.processing.Processor;

import toolbox.JavacTask;

import toolbox.Task;

import toolbox.Task.Expect;

import toolbox.TestRunner;

import toolbox.ToolBox;

public class MalformedAnnotationProcessorTests extends TestRunner{

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

        new MalformedAnnotationProcessorTests().runTests(

                m -> new Object[] { Paths.get(m.getName()) }

        );

    }

    private ToolBox tb = new ToolBox();

    public MalformedAnnotationProcessorTests() {

        super(System.err);

    }

    @Test

    public void testBadAnnotationProcessor(Path base) throws Exception {

        Path apDir = base.resolve("annoprocessor");

        tb.writeFile(apDir.resolve("META-INF").resolve("services")

                          .resolve(Processor.class.getCanonicalName()), "BadAnnoProcessor");

        tb.writeFile(apDir.resolve("BadAnnoProcessor.class"), "badannoprocessor");

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src, "package test; public class Test {}");

        List<String> actualErrors =

                new JavacTask(tb)

                    .options("-XDrawDiagnostics",

                             "-classpath", "",

                             "-sourcepath", src.toString(),

                             "-processorpath", apDir.toString())

                    .outdir(classes)

                    .files(tb.findJavaFiles(src))

                    .run(Expect.FAIL)

                    .writeAll()

                    .getOutputLines(Task.OutputKind.DIRECT);

        System.out.println(actualErrors.get(0));

        if (!actualErrors.get(0).contains("- compiler.err.proc.cant.load.class: " +

                                          "Incompatible magic value")) {

            throw new AssertionError("Unexpected errors reported: " + actualErrors);

        }

    }

    @Test

    public void testMissingAnnotationProcessor(Path base) throws Exception {

        Path apDir = base.resolve("annoprocessor");

        tb.writeFile(apDir.resolve("META-INF").resolve("services").resolve(Processor.class.getCanonicalName()),

                     "MissingAnnoProcessor");

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src, "package test; public class Test {}");

        List<String> actualErrors =

                new JavacTask(tb)

                    .options("-XDrawDiagnostics",

                             "-classpath", "",

                             "-sourcepath", src.toString(),

                             "-processorpath", apDir.toString())

                    .outdir(classes)

                    .files(tb.findJavaFiles(src))

                    .run(Expect.FAIL)

                    .writeAll()

                    .getOutputLines(Task.OutputKind.DIRECT);

        if (!actualErrors.get(0).contains("- compiler.err.proc.bad.config.file: " +

            "javax.annotation.processing.Processor: Provider MissingAnnoProcessor not found")) {

            throw new AssertionError("Unexpected errors reported: " + actualErrors);

        }

    }

    @Test

    public void testWrongClassFileVersion(Path base) throws Exception {

        Path apDir = base.resolve("ap");

        tb.writeFile(apDir.resolve("META-INF").resolve("services").resolve(Processor.class.getCanonicalName()),

                     "WrongClassFileVersion");

        new JavacTask(tb)

                .outdir(apDir)

                .sources("class WrongClassFileVersion {}")

                .run()

                .writeAll();

        increaseMajor(apDir.resolve("WrongClassFileVersion.class"), 1);

        Path src = base.resolve("src");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        tb.writeJavaFiles(src, "package test; public class Test {}");

        List<String> actualErrors =

                new JavacTask(tb)

                    .options("-XDrawDiagnostics",

                             "-classpath", "",

                             "-sourcepath", src.toString(),

                             "-processorpath", apDir.toString())

                    .outdir(classes)

                    .files(tb.findJavaFiles(src))

                    .run(Expect.FAIL)

                    .writeAll()

                    .getOutputLines(Task.OutputKind.DIRECT);

        if (!actualErrors.get(0).contains("- compiler.err.proc.cant.load.class: " +

            "WrongClassFileVersion has been compiled by a more recent version")) {

            throw new AssertionError("Unexpected errors reported: " + actualErrors);

        }

    }

    // Increase class file cfile's major version by delta

    // (note: based on test/langtools/tools/javac/6330997/T6330997.java)

    static void increaseMajor(Path cfile, int delta) {

        try (RandomAccessFile cls =

             new RandomAccessFile(cfile.toFile(), "rw");

             FileChannel fc = cls.getChannel()) {

            ByteBuffer rbuf = ByteBuffer.allocate(2);

            fc.read(rbuf, 6);

            ByteBuffer wbuf = ByteBuffer.allocate(2);

            wbuf.putShort(0, (short)(rbuf.getShort(0) + delta));

            fc.write(wbuf, 6);

            fc.force(false);

        } catch (Exception e){

            throw new RuntimeException("Failed: unexpected exception");

         }

     }

}