1 /*

     2  * Copyright (c) 2004, 2010, 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 com.sun.tools.apt.main;

    27 

    28 import java.io.IOException;

    29 import java.io.Reader;

    30 import java.io.FileReader;

    31 import java.io.BufferedReader;

    32 import java.io.StreamTokenizer;

    33 import com.sun.tools.javac.util.ListBuffer;

    34 

    35 /**

    36  * Various utility methods for processing Java tool command line arguments.

    37  *

    38  *  <p><b>This is NOT part of any supported API.

    39  *  If you write code that depends on this, you do so at your own risk.

    40  *  This code and its internal interfaces are subject to change or

    41  *  deletion without notice.</b>

    42  */

    43 public class CommandLine {

    44     /**

    45      * Process Win32-style command files for the specified command line

    46      * arguments and return the resulting arguments. A command file argument

    47      * is of the form '@file' where 'file' is the name of the file whose

    48      * contents are to be parsed for additional arguments. The contents of

    49      * the command file are parsed using StreamTokenizer and the original

    50      * '@file' argument replaced with the resulting tokens. Recursive command

    51      * files are not supported. The '@' character itself can be quoted with

    52      * the sequence '@@'.

    53      */

    54     public static String[] parse(String[] args)

    55         throws IOException

    56     {

    57         ListBuffer<String> newArgs = new ListBuffer<String>();

    58         for (int i = 0; i < args.length; i++) {

    59             String arg = args[i];

    60             if (arg.length() > 1 && arg.charAt(0) == '@') {

    61                 arg = arg.substring(1);

    62                 if (arg.charAt(0) == '@') {

    63                     newArgs.append(arg);

    64                 } else {

    65                     loadCmdFile(arg, newArgs);

    66                 }

    67             } else {

    68                 newArgs.append(arg);

    69             }

    70         }

    71         return newArgs.toList().toArray(new String[newArgs.length()]);

    72     }

    73 

    74     private static void loadCmdFile(String name, ListBuffer<String> args)

    75         throws IOException

    76     {

    77         Reader r = new BufferedReader(new FileReader(name));

    78         StreamTokenizer st = new StreamTokenizer(r);

    79         st.resetSyntax();

    80         st.wordChars(' ', 255);

    81         st.whitespaceChars(0, ' ');

    82         st.commentChar('#');

    83         st.quoteChar('"');

    84         st.quoteChar('\'');

    85         while (st.nextToken() != StreamTokenizer.TT_EOF) {

    86             args.append(st.sval);

    87         }

    88         r.close();

    89     }

    90 }