/*

 * Copyright (c) 2005, 2011, 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.  Oracle designates this

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

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

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

 * questions.

 */

package sun.management;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import javax.management.ObjectName;

import com.sun.management.DiagnosticCommandInfo;

import com.sun.management.DiagnosticCommandArgumentInfo;

import com.sun.management.HotSpotDiagnosticMXBean;

import com.sun.management.VMOption;

/**

 * Implementation of the diagnostic MBean for Hotspot VM.

 */

public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean {

    public HotSpotDiagnostic() {

    }

    public native void dumpHeap(String outputFile, boolean live) throws IOException;

    public List<VMOption> getDiagnosticOptions() {

        List<Flag> allFlags = Flag.getAllFlags();

        for (Flag flag : allFlags) {

            if (flag.isWriteable() && flag.isExternal()) {

                result.add(flag.getVMOption());

            }

        }

        return result;

    }

    public VMOption getVMOption(String name) {

        if (name == null) {

            throw new NullPointerException("name cannot be null");

        }

        Flag f = Flag.getFlag(name);

        if (f == null) {

            throw new IllegalArgumentException("VM option \"" +

                name + "\" does not exist");

        }

        return f.getVMOption();

    }

    public void setVMOption(String name, String value) {

        if (name == null) {

            throw new NullPointerException("name cannot be null");

        }

        if (value == null) {

            throw new NullPointerException("value cannot be null");

        }

        Util.checkControlAccess();

        Flag flag = Flag.getFlag(name);

        if (flag == null) {

            throw new IllegalArgumentException("VM option \"" +

                name + "\" does not exist");

        }

        if (!flag.isWriteable()){

            throw new IllegalArgumentException("VM Option \"" +

                name + "\" is not writeable");

        }

        // Check the type of the value

        Object v = flag.getValue();

        if (v instanceof Long) {

            try {

                long l = Long.parseLong(value);

                Flag.setLongValue(name, l);

            } catch (NumberFormatException e) {

                IllegalArgumentException iae =

                    new IllegalArgumentException("Invalid value:" +

                        " VM Option \"" + name + "\"" +

                        " expects numeric value");

                iae.initCause(e);

                throw iae;

            }

        } else if (v instanceof Boolean) {

            if (!value.equalsIgnoreCase("true") &&

                !value.equalsIgnoreCase("false")) {

                throw new IllegalArgumentException("Invalid value:" +

                    " VM Option \"" + name + "\"" +

                    " expects \"true\" or \"false\".");

            }

            Flag.setBooleanValue(name, Boolean.parseBoolean(value));

        } else if (v instanceof String) {

            Flag.setStringValue(name, value);

        } else {

            throw new IllegalArgumentException("VM Option \"" +

                name + "\" is of an unsupported type: " +

                v.getClass().getName());

        }

    }

    public List<String> getDiagnosticCommands() {

        String[] commands = getDiagnosticCommands0();

        return commands == null ? Collections.<String>emptyList() :

            Arrays.asList(commands);

    }

    public DiagnosticCommandInfo getDiagnosticCommandInfo(String command) {

        String[] array = new String[] { command };

        return getDiagnosticCommandInfo0(array)[0];

    }

    public List<DiagnosticCommandInfo> getDiagnosticCommandInfo() {

        String[] commands = getDiagnosticCommands0();

        return Arrays.asList(getDiagnosticCommandInfo0(commands));

    }

    public List<DiagnosticCommandInfo> getDiagnosticCommandInfo(

        List<String> commands) {

        return Arrays.asList(getDiagnosticCommandInfo0(

            commands.toArray(new String[commands.size()])));

    }

    public String execute(String command) {

        Util.checkControlAccess();

        return executeDiagnosticCommand0(command);

    }

    public String execute(String cmd, String... arguments) {

        if(cmd == null) {

            throw new NullPointerException("Missing command name");

        }

        StringBuilder sb = new StringBuilder();

        sb.append(cmd);

        sb.append(" ");

        for(String arg : arguments) {

            sb.append(arg);

            sb.append(" ");

        }

        return execute(sb.toString());

    }

    public ObjectName getObjectName() {

        return Util.newObjectName("com.sun.management:type=HotSpotDiagnostic");

    }

    private native String[] getDiagnosticCommands0();

    private native DiagnosticCommandInfo[] getDiagnosticCommandInfo0(

        String[] commands) throws IllegalArgumentException;

    private native String executeDiagnosticCommand0(String command)

        throws IllegalArgumentException;

}