1 /*

     2  * Copyright (c) 1995, 2000, 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 sun.misc;

    27 

    28 /**

    29  * MessageUtils: miscellaneous utilities for handling error and status

    30  * properties and messages.

    31  *

    32  * @author Herb Jellinek

    33  */

    34 

    35 public class MessageUtils {

    36     // can instantiate it for to allow less verbose use - via instance

    37     // instead of classname

    38 

    39     public MessageUtils() { }

    40 

    41     public static String subst(String patt, String arg) {

    42         String args[] = { arg };

    43         return subst(patt, args);

    44     }

    45 

    46     public static String subst(String patt, String arg1, String arg2) {

    47         String args[] = { arg1, arg2 };

    48         return subst(patt, args);

    49     }

    50 

    51     public static String subst(String patt, String arg1, String arg2,

    52                                String arg3) {

    53         String args[] = { arg1, arg2, arg3 };

    54         return subst(patt, args);

    55     }

    56 

    57     public static String subst(String patt, String args[]) {

    58         StringBuilder result = new StringBuilder();

    59         int len = patt.length();

    60         for (int i = 0; i >= 0 && i < len; i++) {

    61             char ch = patt.charAt(i);

    62             if (ch == '%') {

    63                 if (i != len) {

    64                     int index = Character.digit(patt.charAt(i + 1), 10);

    65                     if (index == -1) {

    66                         result.append(patt.charAt(i + 1));

    67                         i++;

    68                     } else if (index < args.length) {

    69                         result.append(args[index]);

    70                         i++;

    71                     }

    72                 }

    73             } else {

    74                 result.append(ch);

    75             }

    76         }

    77         return result.toString();

    78     }

    79 

    80     public static String substProp(String propName, String arg) {

    81         return subst(System.getProperty(propName), arg);

    82     }

    83 

    84     public static String substProp(String propName, String arg1, String arg2) {

    85         return subst(System.getProperty(propName), arg1, arg2);

    86     }

    87 

    88     public static String substProp(String propName, String arg1, String arg2,

    89                                    String arg3) {

    90         return subst(System.getProperty(propName), arg1, arg2, arg3);

    91     }

    92 

    93     /**

    94      *  Print a message directly to stderr, bypassing all the

    95      *  character conversion methods.

    96      *  @param msg   message to print

    97      */

    98     public static native void toStderr(String msg);

    99 

   100     /**

   101      *  Print a message directly to stdout, bypassing all the

   102      *  character conversion methods.

   103      *  @param msg   message to print

   104      */

   105     public static native void toStdout(String msg);

   106 

   107 

   108     // Short forms of the above

   109 

   110     public static void err(String s) {

   111         toStderr(s + "\n");

   112     }

   113 

   114     public static void out(String s) {

   115         toStdout(s + "\n");

   116     }

   117 

   118     // Print a stack trace to stderr

   119     //

   120     public static void where() {

   121         Throwable t = new Throwable();

   122         StackTraceElement[] es = t.getStackTrace();

   123         for (int i = 1; i < es.length; i++)

   124             toStderr("\t" + es[i].toString() + "\n");

   125     }

   126 

   127 }