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package com.sun.jdi.event;

import com.sun.jdi.Field;
import com.sun.jdi.ObjectCollectedException;
import com.sun.jdi.ObjectReference;
import com.sun.jdi.Value;
import com.sun.jdi.VirtualMachine;

Notification of a field triggered event encountered by a thread in the
target VM.
Author:
Robert Field
See Also:
EventQueue
VirtualMachine
Since:
 1.3/**
 * Notification of a field triggered event encountered by a thread in the
 * target VM.
 *
 * @see EventQueue
 * @see VirtualMachine
 *
 * @author Robert Field
 * @since  1.3
 */
public interface WatchpointEvent extends LocatableEvent {

    
Returns the field that is about to be accessed/modified.
Throws:
ObjectCollectedException – may be thrown if class
has been garbage collected.
Returns:
a Field which mirrors the field in the target VM./**
     * Returns the field that is about to be accessed/modified.
     *
     * @return a {@link Field} which mirrors the field
     * in the target VM.
     * @throws ObjectCollectedException may be thrown if class
     * has been garbage collected.
     */
    Field field();

    
Returns the object whose field is about to be accessed/modified.
Return null is the access is to a static field.
Returns:
a ObjectReference which mirrors the event's object in the target VM./**
     * Returns the object whose field is about to be accessed/modified.
     * Return null is the access is to a static field.
     *
     * @return a {@link ObjectReference} which mirrors the event's
     * object in the target VM.
     */
    ObjectReference object();

    
Current value of the field.
Throws:
ObjectCollectedException – if object or class have been
garbage collected./**
     * Current value of the field.
     * @throws ObjectCollectedException if object or class have been
     * garbage collected.
     */
    Value valueCurrent();
}