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Java example source code file (T6572945.java)

This example Java source code file (T6572945.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bufferedreader, file, filereader, files, interruptedexception, ioexception, javah, only, processbuilder, set, string, stringbuilder, testclass1, testclass2, throwable, util

The T6572945.java Java example source code

/*
 * Copyright (c) 2007, 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 6572945
 * @summary rewrite javah as an annotation processor, instead of as a doclet
 * @build TestClass1 TestClass2 TestClass3
 * @run main T6572945
 */

import java.io.*;
import java.util.*;
import com.sun.tools.javah.Main;

public class T6572945
{
    static File testSrc = new File(System.getProperty("test.src", "."));
    static File testClasses = new File(System.getProperty("test.classes", "."));
    static boolean isWindows = System.getProperty("os.name").startsWith("Windows");

    public static void main(String... args)
        throws IOException, InterruptedException
    {
        boolean ok = new T6572945().run(args);
        if (!ok)
            throw new Error("Test Failed");
    }

    public boolean run(String[] args)
        throws IOException, InterruptedException
    {
        if (args.length == 1)
            jdk = new File(args[0]);

        test("-o", "jni.file.1",  "-jni", "TestClass1");
        test("-o", "jni.file.2",  "-jni", "TestClass1", "TestClass2");
        test("-d", "jni.dir.1",   "-jni", "TestClass1", "TestClass2");
        test("-o", "jni.file.3",  "-jni", "TestClass3");

        // The following tests are disabled because llni support has been
        // discontinued, and because bugs in old javah means that character
        // for character testing against output from old javah does not work.
        // In fact, the LLNI impl in new javah is actually better than the
        // impl in old javah because of a couple of significant bug fixes.

//        test("-o", "llni.file.1", "-llni", "TestClass1");
//        test("-o", "llni.file.2", "-llni", "TestClass1", "TestClass2");
//        test("-d", "llni.dir.1",  "-llni", "TestClass1", "TestClass2");
//        test("-o", "llni.file.3", "-llni", "TestClass3");

        return (errors == 0);
    }

    void test(String... args)
        throws IOException, InterruptedException
    {
        String[] cp_args = new String[args.length + 2];
        cp_args[0] = "-classpath";
        cp_args[1] = testClasses.getPath();
        System.arraycopy(args, 0, cp_args, 2, args.length);

        if (jdk != null)
            init(cp_args);

        File out = null;
        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-o")) {
                out = new File(args[++i]);
                break;
            } else if (args[i].equals("-d")) {
                out = new File(args[++i]);
                out.mkdirs();
                break;
            }
        }

        try {
            System.out.println("test: " + Arrays.asList(cp_args));

//            // Uncomment and use the following lines to execute javah via the
//            // command line -- for example, to run old javah and set up the golden files
//            List<String> cmd = new ArrayList();
//            File javaHome = new File(System.getProperty("java.home"));
//            if (javaHome.getName().equals("jre"))
//                javaHome = javaHome.getParentFile();
//            File javah = new File(new File(javaHome, "bin"), "javah");
//            cmd.add(javah.getPath());
//            cmd.addAll(Arrays.asList(cp_args));
//            ProcessBuilder pb = new ProcessBuilder(cmd);
//            pb.redirectErrorStream(true);
//            pb.start();
//            Process p = pb.start();
//            String line;
//            BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
//            while ((line = in.readLine()) != null)
//                System.err.println(line);
//            in.close();
//            int rc = p.waitFor();

            // Use new javah
            PrintWriter err = new PrintWriter(System.err, true);
            int rc = Main.run(cp_args, err);

            if (rc != 0) {
                error("javah failed: rc=" + rc);
                return;
            }

            // The golden files use the LL suffix for long constants, which
            // is used on Linux and Solaris.   On Windows, the suffix is i64,
            // so compare will update the golden files on the fly before the
            // final comparison.
            compare(new File(new File(testSrc, "gold"), out.getName()), out);
        } catch (Throwable t) {
            t.printStackTrace();
            error("javah threw exception");
        }
    }

    void init(String[] args) throws IOException, InterruptedException {
        String[] cmdArgs = new String[args.length + 1];
        cmdArgs[0] = new File(new File(jdk, "bin"), "javah").getPath();
        System.arraycopy(args, 0, cmdArgs, 1, args.length);

        System.out.println("init: " + Arrays.asList(cmdArgs));

        ProcessBuilder pb = new ProcessBuilder(cmdArgs);
        pb.directory(new File(testSrc, "gold"));
        pb.redirectErrorStream(true);
        Process p = pb.start();
        BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line;
        while ((line = in.readLine()) != null)
            System.out.println("javah: " + line);
        int rc = p.waitFor();
        if (rc != 0)
            error("javah: exit code " + rc);
    }

    /** Compare two directories.
     *  @param f1 The golden directory
     *  @param f2 The directory to be compared
     */
    void compare(File f1, File f2) {
        compare(f1, f2, null);
    }

    /** Compare two files or directories
     *  @param f1 The golden directory
     *  @param f2 The directory to be compared
     *  @param p An optional path identifying a file within the two directories
     */
    void compare(File f1, File f2, String p) {
        File f1p = (p == null ? f1 : new File(f1, p));
        File f2p = (p == null ? f2 : new File(f2, p));
        System.out.println("compare " + f1p + " " + f2p);
        if (f1p.isDirectory() && f2p.isDirectory()) {
            Set<String> children = new HashSet();
            children.addAll(Arrays.asList(f1p.list()));
            children.addAll(Arrays.asList(f2p.list()));
            for (String c: children) {
                compare(f1, f2, new File(p, c).getPath()); // null-safe for p
            }
        }
        else if (f1p.isFile() && f2p.isFile()) {
            String s1 = read(f1p);
            if (isWindows) {
                // f1/s1 is the golden file
                // on Windows, long constants use the i64 suffix, not LL
                s1 = s1.replaceAll("( [0-9]+)LL\n", "$1i64\n");
            }
            String s2 = read(f2p);
            if (!s1.equals(s2)) {
                System.out.println("File: " + f1p + "\n" + s1);
                System.out.println("File: " + f2p + "\n" + s2);
                error("Files differ: " + f1p + " " + f2p);
            }
        }
        else if (f1p.exists() && !f2p.exists())
            error("Only in " + f1 + ": " + p);
        else if (f2p.exists() && !f1p.exists())
            error("Only in " + f2 + ": " + p);
        else
            error("Files differ: " + f1p + " " + f2p);
    }

    private String read(File f) {
        try {
            BufferedReader in = new BufferedReader(new FileReader(f));
            try {
                StringBuilder sb = new StringBuilder((int) f.length());
                String line;
                while ((line = in.readLine()) != null) {
                    sb.append(line);
                    sb.append("\n");
                }
                return sb.toString();
            } finally {
                try {
                    in.close();
                } catch (IOException e) {
                }
            }
        } catch (IOException e) {
            error("error reading " + f + ": " + e);
            return "";
        }
    }


    private void error(String msg) {
        System.out.println(msg);
        errors++;
    }

    private int errors;
    private File jdk;
}

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