1 /*******************************************************************************
2 * Copyright (c) 2012, 2013 Ericsson
3 * Copyright (c) 2010, 2011 École Polytechnique de Montréal
4 * Copyright (c) 2010, 2011 Alexandre Montplaisir <alexandre.montplaisir@gmail.com>
6 * All rights reserved. This program and the accompanying materials are
7 * made available under the terms of the Eclipse Public License v1.0 which
8 * accompanies this distribution, and is available at
9 * http://www.eclipse.org/legal/epl-v10.html
11 *******************************************************************************/
13 package org
.eclipse
.linuxtools
.tmf
.core
.statesystem
;
15 import org
.eclipse
.linuxtools
.tmf
.core
.event
.ITmfEvent
;
16 import org
.eclipse
.linuxtools
.tmf
.core
.trace
.ITmfTrace
;
19 * This is the interface used to define the "state change input", which is the
20 * main type of input that goes in the state system.
22 * Usually a state change input, also called "state provider" is the piece of
23 * the pipeline which converts trace events to state changes.
25 * @author Alexandre Montplaisir
28 public interface ITmfStateProvider
{
31 * Special state provider version number that will tell the backend to
32 * ignore the version check and open an existing file even if the versions
36 static final int IGNORE_PROVIDER_VERSION
= -42;
39 * Event handler plugins should provide a version number. This is used to
40 * determine if a potential existing file can be re-opened later (if the
41 * versions in the file and in the viewer match), or if the file should be
42 * rebuilt from scratch (if the versions don't match).
44 * @return The version number of the input plugin
50 * Get the trace with which this state input plugin is associated.
52 * @return The associated trace
57 * Return the start time of this "state change input", which is normally the
58 * start time of the originating trace (or it can be the time of the first
59 * state-changing event).
61 * @return The start time
66 * Method for the input plugin to specify which type of events it expects.
67 * This will guarantee that all events it receives via processEvent() are
68 * indeed of the given type, so it should be safe to cast to that type.
70 * @return The expected Class of the event. Only events of this class (and
71 * valid subclasses) will be handled.
74 Class
<?
extends ITmfEvent
> getExpectedEventType();
77 * Assign the target state system where this SCI will insert its state
78 * changes. Because of dependencies issues, this can normally not be done at
81 * This needs to be called before .run()!
84 * Target state system for the state changes generated by this
88 void assignTargetStateSystem(ITmfStateSystemBuilder ssb
);
91 * Return the currently assigned target state system.
93 * @return Reference to the currently assigned state system, or null if no
97 ITmfStateSystem
getAssignedStateSystem();
100 * Send an event to this input plugin for processing. The implementation
101 * should check the contents, and call the state-modifying methods of its
102 * IStateSystemBuilder object accordingly.
105 * The event (which should be safe to cast to the
106 * expectedEventType) that has to be processed.
108 void processEvent(ITmfEvent event
);
111 * Provide a non-initialized copy of this state input plugin. You will need
112 * to call {@link #assignTargetStateSystem} on it to assign its target.
114 * @return A new state change input object, of the same type, but without an
115 * assigned target state system
118 ITmfStateProvider
getNewInstance();
121 * Indicate to the state history building process that we are done (for now),
122 * and that it should close its current history.