/*
 * Copyright 2005 Sun Microsystems, Inc.  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.
 *
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

package sun.jvm.hotspot.jdi;

import com.sun.jdi.*;

// FIXME: This class should implement com.sun.jdi.MonitorInfo.
//        So fix this when hotspot is started to build with
//        jdk1.6.
public class MonitorInfoImpl extends MirrorImpl {

    /* Once false, monitorInfo should not be used.
     * access synchronized on (vm.state())
     */
    private boolean isValid = true;

    ObjectReference monitor;
    ThreadReference thread;
    int  stack_depth;

    MonitorInfoImpl(VirtualMachine vm, ObjectReference mon,
                    ThreadReference thread, int dpth) {
        super(vm);
        this.monitor = mon;
        this.thread = thread;
        this.stack_depth = dpth;
    }

    private void validateMonitorInfo() {
        if (!isValid) {
            throw new InvalidStackFrameException("Thread has been resumed");
        }
    }

    public ObjectReference monitor() {
        validateMonitorInfo();
        return monitor;
    }

    public int stackDepth() {
        validateMonitorInfo();
        return stack_depth;
    }

    public ThreadReference thread() {
        validateMonitorInfo();
        return thread;
    }
}