jdk

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/*
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 * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8271079
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 * @summary JavaFileObject#toUri in MR-JAR returns real path
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 * @modules java.compiler
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 *          jdk.compiler
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 * @run main T8271079
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 */
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import java.io.*;
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import java.net.*;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.*;
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import java.util.*;
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import java.util.jar.JarEntry;
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import javax.tools.*;
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public class T8271079 {
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    public static void main(String[] args) throws Exception {
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        new T8271079().run();
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    }
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    final PrintStream out;
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    T8271079() {
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        this.out = System.out;
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    }
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    void run() throws Exception {
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        Path mr = generateMultiReleaseJar();
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        try {
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            testT8271079(mr);
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        } finally {
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            Files.deleteIfExists(mr);
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        }
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    }
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    // $ echo 'module hello {}' > module-info.java
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    // $ javac -d classes --release 9 module-info.java
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    // $ jar --create --file mr.jar --release 9 -C classes .
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    Path generateMultiReleaseJar() throws Exception {
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        Files.writeString(Path.of("module-info.java"), "module hello {}");
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        java.util.spi.ToolProvider.findFirst("javac").orElseThrow()
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            .run(out, System.err, "-d", "classes", "--release", "9", "module-info.java");
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        Path mr = Path.of("mr.jar");
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        java.util.spi.ToolProvider.findFirst("jar").orElseThrow()
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            .run(out, System.err, "--create", "--file", mr.toString(), "--release", "9", "-C", "classes", ".");
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        out.println("Created: " + mr.toUri());
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        out.println(" Exists: " + Files.exists(mr));
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        return mr;
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    }
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    void testT8271079(Path path) throws Exception {
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        StandardJavaFileManager fileManager =
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            ToolProvider.getSystemJavaCompiler()
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                .getStandardFileManager(null, Locale.ENGLISH, StandardCharsets.UTF_8);
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        fileManager.setLocationFromPaths(StandardLocation.CLASS_PATH, List.of(path));
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        Iterator<String> options = Arrays.asList("--multi-release", "9").iterator();
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        fileManager.handleOption(options.next(), options);
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        Iterable<JavaFileObject> list =
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            fileManager.list(
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                StandardLocation.CLASS_PATH, "", EnumSet.allOf(JavaFileObject.Kind.class), false);
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        for (JavaFileObject f : list) {
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            out.println("JavaFileObject#getName: " + f.getName());
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            out.println("JavaFileObject#toUri: " + f.toUri());
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            openUsingUri(f.toUri());
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        }
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        System.gc(); // JDK-8224794
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    }
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    void openUsingUri(URI uri) throws IOException {
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        URLConnection connection = uri.toURL().openConnection();
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        connection.setUseCaches(false); // JDK-8224794
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        if (connection instanceof JarURLConnection jar) {
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            try {
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                JarEntry entry = jar.getJarEntry();
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                out.println("JarEntry#getName: " + entry.getName());
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                connection.getInputStream().close(); // JDK-8224794
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            } catch (FileNotFoundException e) {
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                throw e;
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            }
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        }
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    }
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}
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