modificationwatchpointspec.java

jpda例子文件

/*
 * @(#)ModificationWatchpointSpec.java	1.15 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright (c) 1997-1999 by Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 * 
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

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.
     */
    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;
    }

    public String toString() {
        return MessageOutput.format("watch modification of",
                                    new Object [] {refSpec.toString(),
                                                   fieldId});
    }
}