/*
* Copyright (c) 2010, 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.
*
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package com.sun.tools.visualvm.modules.tracer.jvmstat;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import sun.jvmstat.monitor.Monitor;
/**
* @author Tomas Hurka
*/
class Utils {
private static Method getVariabilityMethod = getMonitorMethod("getVariability");
private static Method getUnitsMethod = getMonitorMethod("getUnits");
static Object getVariability(Monitor monitor) {
return invokeGetter(monitor, getVariabilityMethod);
}
static Object getUnits(Monitor monitor) {
return invokeGetter(monitor, getUnitsMethod);
}
private static Object invokeGetter(Monitor monitor, Method method) {
try {
return method.invoke(monitor);
} catch (IllegalArgumentException ex) {
throw new RuntimeException(ex);
} catch (InvocationTargetException ex) {
throw new RuntimeException(ex);
} catch (IllegalAccessException ex) {
throw new RuntimeException(ex);
}
}
private static Method getMonitorMethod(String methodName) {
try {
return Monitor.class.getDeclaredMethod(methodName);
} catch (SecurityException ex) {
throw new RuntimeException(ex);
} catch (NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
}