1/*
2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 * This source code is provided to illustrate the usage of a given feature
28 * or technique and has been deliberately simplified. Additional steps
29 * required for a production-quality application, such as security checks,
30 * input validation and proper error handling, might not be present in
31 * this sample code.
32 */
33
34
35package com.sun.tools.example.debug.tty;
36
37import com.sun.jdi.*;
38import com.sun.jdi.request.*;
39
40class AccessWatchpointSpec extends WatchpointSpec {
41
42    AccessWatchpointSpec(ReferenceTypeSpec refSpec, String fieldId)
43                                  throws MalformedMemberNameException {
44        super(refSpec, fieldId);
45    }
46
47    /**
48     * The 'refType' is known to match, return the EventRequest.
49     */
50    @Override
51    EventRequest resolveEventRequest(ReferenceType refType)
52                                      throws NoSuchFieldException {
53        Field field = refType.fieldByName(fieldId);
54        EventRequestManager em = refType.virtualMachine().eventRequestManager();
55        EventRequest wp = em.createAccessWatchpointRequest(field);
56        wp.setSuspendPolicy(suspendPolicy);
57        wp.enable();
58        return wp;
59    }
60
61    @Override
62    public String toString() {
63        return MessageOutput.format("watch accesses of",
64                                    new Object [] {refSpec.toString(),
65                                                   fieldId});
66    }
67}
68