Java Reflection Method Invoke invoke(Method method)

Description

invoke

License

Open Source License

Declaration

private static long invoke(Method method) 

Method Source Code

//package com.java2s;
/*/* w w  w .  jav  a2s  .  c  om*/
 * Copyright (c) 2002-2016 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.lang.reflect.Method;

public class Main {
    public static final long VALUE_UNAVAILABLE = -1;
    private static final OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();

    private static long invoke(Method method) {
        try {
            Object value = (method == null) ? null : method.invoke(osBean);
            return (value == null) ? VALUE_UNAVAILABLE : ((Number) value).longValue();
        } catch (Throwable t) {
            return VALUE_UNAVAILABLE;
        }
    }
}

Related

1. invoke(Method m, Object o, Object[] args)
2. invoke(Method m, Object o, String msg, Object... parameters)
3. invoke(Method m, Object target, Object... params)
4. invoke(Method method)
5. invoke(Method method, Object data, Object... arguments)
6. invoke(Method method, Object instance, Object... parameters)
7. invoke(Method method, Object it, Object... args)