/*

 * Copyright (c) 1998, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

package com.sun.tools.example.debug.tty;

import com.sun.jdi.*;

import com.sun.jdi.request.EventRequestManager;

import com.sun.jdi.request.EventRequest;

class ModificationWatchpointSpec extends WatchpointSpec {

    ModificationWatchpointSpec(ReferenceTypeSpec refSpec, String fieldId)

                                  throws MalformedMemberNameException {

        super(refSpec, fieldId);

    }

    /**

     * The 'refType' is known to match, return the EventRequest.

     */

    @Override

    EventRequest resolveEventRequest(ReferenceType refType)

                                      throws NoSuchFieldException {

        Field field = refType.fieldByName(fieldId);

        EventRequestManager em = refType.virtualMachine().eventRequestManager();

        EventRequest wp = em.createModificationWatchpointRequest(field);

        wp.setSuspendPolicy(suspendPolicy);

        wp.enable();

        return wp;

    }

    @Override

    public String toString() {

        return MessageOutput.format("watch modification of",

                                    new Object [] {refSpec.toString(),

                                                   fieldId});

    }

}