/*

 * Copyright (c) 2005, 2017, 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.List;

import javax.management.ObjectName;

import com.sun.management.HotSpotDiagnosticMXBean;

import com.sun.management.VMOption;

import java.security.AccessController;

import java.security.PrivilegedAction;

/**

 * Implementation of the diagnostic MBean for Hotspot VM.

 */

public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean {

    public HotSpotDiagnostic() {

    }

    @Override

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

        String propertyName = "jdk.management.heapdump.allowAnyFileSuffix";

        PrivilegedAction<Boolean> pa = () -> Boolean.parseBoolean(System.getProperty(propertyName, "false"));

        boolean allowAnyFileSuffix = AccessController.doPrivileged(pa);

        if (!allowAnyFileSuffix && !outputFile.endsWith(".hprof")) {

            throw new IllegalArgumentException("heapdump file must have .hprof extention");

        }

        SecurityManager security = System.getSecurityManager();

        if (security != null) {

            security.checkWrite(outputFile);

            Util.checkControlAccess();

        }

        dumpHeap0(outputFile, live);

    }

    private native void dumpHeap0(String outputFile, boolean live) throws IOException;

    @Override

    public List<VMOption> getDiagnosticOptions() {

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

        List<VMOption> result = new ArrayList<>();

        for (Flag flag : allFlags) {

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

                result.add(flag.getVMOption());

            }

        }

        return result;

    }

    @Override

    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();

    }

    @Override

    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) {

                throw new IllegalArgumentException("Invalid value:" +

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

                        " expects numeric value", e);

            }

        } else if (v instanceof Double) {

            try {

                double d = Double.parseDouble(value);

                Flag.setDoubleValue(name, d);

            } catch (NumberFormatException e) {

                throw new IllegalArgumentException("Invalid value:" +

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

                        " expects numeric value", e);

            }

        } 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());

        }

    }

    @Override

    public ObjectName getObjectName() {

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

    }

}