/*

 * Copyright 1995-2000 Sun Microsystems, Inc.  All Rights Reserved.

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

 *

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

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

 * published by the Free Software Foundation.  Sun designates this

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

 * by Sun in the LICENSE file that accompanied this code.

 *

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

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

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

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

 * accompanied this code).

 *

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

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

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

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.misc;

/**

 * MessageUtils: miscellaneous utilities for handling error and status

 * properties and messages.

 *

 * @author Herb Jellinek

 */

public class MessageUtils {

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

    // instead of classname

    public MessageUtils() { }

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

        String args[] = { arg };

        return subst(patt, args);

    }

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

        String args[] = { arg1, arg2 };

        return subst(patt, args);

    }

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

                               String arg3) {

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

        return subst(patt, args);

    }

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

        StringBuffer result = new StringBuffer();

        int len = patt.length();

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

            char ch = patt.charAt(i);

            if (ch == '%') {

                if (i != len) {

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

                    if (index == -1) {

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

                        i++;

                    } else if (index < args.length) {

                        result.append(args[index]);

                        i++;

                    }

                }

            } else {

                result.append(ch);

            }

        }

        return result.toString();

    }

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

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

    }

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

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

    }

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

                                   String arg3) {

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

    }

    /**

     *  Print a message directly to stderr, bypassing all the

     *  character conversion methods.

     *  @param msg   message to print

     */

    public static native void toStderr(String msg);

    /**

     *  Print a message directly to stdout, bypassing all the

     *  character conversion methods.

     *  @param msg   message to print

     */

    public static native void toStdout(String msg);

    // Short forms of the above

    public static void err(String s) {

        toStderr(s + "\n");

    }

    public static void out(String s) {

        toStdout(s + "\n");

    }

    // Print a stack trace to stderr

    //

    public static void where() {

        Throwable t = new Throwable();

        StackTraceElement[] es = t.getStackTrace();

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

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

    }

}