/*

 * Copyright (c) 2013 Oracle and/or its affiliates. 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.

 *

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

 * questions.

 */

import sun.management.ManagementFactoryHelper;

import com.sun.management.DiagnosticCommandMBean;

public class DcmdUtil

{

    public static String executeDcmd(String cmd, String ... args) {

        DiagnosticCommandMBean dcmd = ManagementFactoryHelper.getDiagnosticCommandMBean();

        Object[] dcmdArgs = {args};

        String[] signature = {String[].class.getName()};

        try {

            System.out.print("> " + cmd + " ");

            for (String s : args) {

                System.out.print(s + " ");

            }

            System.out.println(":");

            String result = (String) dcmd.invoke(transform(cmd), dcmdArgs, signature);

            System.out.println(result);

            return result;

        } catch(Exception ex) {

            ex.printStackTrace();

        }

        return null;

    }

    private static String transform(String name) {

        StringBuilder sb = new StringBuilder();

        boolean toLower = true;

        boolean toUpper = false;

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

            char c = name.charAt(i);

            if (c == '.' || c == '_') {

                toLower = false;

                toUpper = true;

            } else {

                if (toUpper) {

                    toUpper = false;

                    sb.append(Character.toUpperCase(c));

                } else if(toLower) {

                    sb.append(Character.toLowerCase(c));

                } else {

                    sb.append(c);

                }

            }

        }

        return sb.toString();

    }

}