1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package build.tools.symbolgenerator;

    27 

    28 import java.io.BufferedInputStream;

    29 import java.io.ByteArrayOutputStream;

    30 import java.io.File;

    31 import java.io.FileOutputStream;

    32 import java.io.IOException;

    33 import java.io.InputStream;

    34 import java.io.OutputStream;

    35 import java.nio.charset.Charset;

    36 import java.util.EnumSet;

    37 

    38 import javax.tools.JavaCompiler;

    39 import javax.tools.JavaFileObject;

    40 import javax.tools.JavaFileObject.Kind;

    41 import javax.tools.StandardJavaFileManager;

    42 import javax.tools.StandardLocation;

    43 import javax.tools.ToolProvider;

    44 

    45 /**A tool to dump the content of the default javac's bootclasspath. This tool should not use any

    46  * features not available on the oldest supported target JDK, which is currently JDK 6.

    47  *

    48  * For more information on use of this site, please see CreateSymbols.

    49  */

    50 public class Probe {

    51 

    52     public static void main(String... args) throws IOException {

    53         if (args.length != 1) {

    54             System.err.println("Not enough arguments.");

    55             System.err.println("Usage:");

    56             System.err.println("    java " + Probe.class.getName() + " <output-file>");

    57             return ;

    58         }

    59 

    60         File outFile = new File(args[0]);

    61         Charset cs = Charset.forName("UTF-8");

    62         JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

    63         StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null);

    64         OutputStream out = new FileOutputStream(outFile);

    65 

    66         try {

    67             Iterable<JavaFileObject> bcpFiles =

    68                     fm.list(StandardLocation.PLATFORM_CLASS_PATH, "", EnumSet.of(Kind.CLASS), true);

    69 

    70             for (JavaFileObject jfo : bcpFiles) {

    71                 InputStream in = new BufferedInputStream(jfo.openInputStream());

    72                 try {

    73                     ByteArrayOutputStream baos = new ByteArrayOutputStream();

    74                     StringBuilder textual = new StringBuilder();

    75                     int read;

    76 

    77                     while ((read = in.read()) != (-1)) {

    78                         baos.write(read);

    79                         textual.append(String.format("%02x", read));

    80                     }

    81 

    82                     textual.append("\n");

    83                     out.write(textual.toString().getBytes(cs));

    84                 } finally {

    85                     in.close();

    86                 }

    87             }

    88         } finally {

    89             out.close();

    90         }

    91     }

    92 

    93 }