/*

 * Copyright (c) 2008, 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.tracing.dtrace;

import java.lang.reflect.Method;

import java.lang.reflect.InvocationTargetException;

import sun.tracing.ProbeSkeleton;

class DTraceProbe extends ProbeSkeleton {

    private Object proxy;

    private Method declared_method;

    private Method implementing_method;

    DTraceProbe(Object proxy, Method m) {

        super(m.getParameterTypes());

        this.proxy = proxy;

        this.declared_method = m;

        try {

            // The JVM will override the proxy method's implementation with

            // a version that will invoke the probe.

            this.implementing_method =  proxy.getClass().getMethod(

                m.getName(), m.getParameterTypes());

        } catch (NoSuchMethodException e) {

            throw new RuntimeException("Internal error, wrong proxy class");

        }

    }

    public boolean isEnabled() {

        return JVM.isEnabled(implementing_method);

    }

    public void uncheckedTrigger(Object[] args) {

        try {

            implementing_method.invoke(proxy, args);

        } catch (IllegalAccessException e) {

            assert false;

        } catch (InvocationTargetException e) {

            assert false;

        }

    }

    String getProbeName() {

        return DTraceProvider.getProbeName(declared_method);

    }

    String getFunctionName() {

        return DTraceProvider.getFunctionName(declared_method);

    }

    Method getMethod() {

        return implementing_method;

    }

    Class<?>[] getParameterTypes() {

        return this.parameters;

    }

}