Mercurial > jdk8-mips64-public > langtools / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/tools/javac/versions/CheckClassFileVersion.java	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,60 @@
     1.4 +/*
     1.5 + * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + */
    1.26 +
    1.27 +import java.io.*;
    1.28 +import java.nio.*;
    1.29 +import java.nio.channels.*;
    1.30 +
    1.31 +
    1.32 +public class CheckClassFileVersion {
    1.33 +
    1.34 +    static String get(String fn) throws IOException {
    1.35 +        ByteBuffer bb = ByteBuffer.allocate(1024);
    1.36 +        FileChannel fc = new FileInputStream(fn).getChannel();
    1.37 +        try {
    1.38 +            bb.clear();
    1.39 +            if (fc.read(bb) < 0)
    1.40 +                throw new IOException("Could not read any bytes");
    1.41 +            bb.flip();
    1.42 +            int minor = bb.getShort(4);
    1.43 +            int major = bb.getShort(6);
    1.44 +            return major + "." + minor;
    1.45 +        } finally {
    1.46 +            fc.close();
    1.47 +        }
    1.48 +    }
    1.49 +
    1.50 +    public static void main(String[] args) throws IOException {
    1.51 +        String cfv = get(args[0]);
    1.52 +        if (args.length == 1) {
    1.53 +            System.out.println(cfv);
    1.54 +            return;
    1.55 +        }
    1.56 +        if (!cfv.equals(args[1])) {
    1.57 +            System.err.println("Class-file version mismatch: Expected "
    1.58 +                               + args[1] + ", got " + cfv);
    1.59 +            System.exit(1);
    1.60 +        }
    1.61 +    }
    1.62 +
    1.63 +}