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
26package build.tools.symbolgenerator;
27
28import java.io.BufferedInputStream;
29import java.io.ByteArrayOutputStream;
30import java.io.File;
31import java.io.FileOutputStream;
32import java.io.IOException;
33import java.io.InputStream;
34import java.io.OutputStream;
35import java.nio.charset.Charset;
36import java.util.EnumSet;
37
38import javax.tools.JavaCompiler;
39import javax.tools.JavaFileObject;
40import javax.tools.JavaFileObject.Kind;
41import javax.tools.StandardJavaFileManager;
42import javax.tools.StandardLocation;
43import 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 */
50public 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}
94