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/*******************************************************************************
* Copyright (c) 2009, 2010, 2012, 2013 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Francois Chouinard - Initial API and implementation
* Francois Chouinard - Put in shape for 1.0
* Patrick Tasse - Updated for removal of context clone
*******************************************************************************/
package org.eclipse.linuxtools.internal.tmf.core.trace;
import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
import org.eclipse.linuxtools.tmf.core.trace.ITmfContext;
import org.eclipse.linuxtools.tmf.core.trace.TmfContext;
/**
* The experiment context in TMF.
* <p>
* The experiment keeps track of the next event from each of its traces so it
* can pick the next one in chronological order.
* <p>
* This implies that the "next" event from each trace has already been
* read and that we at least know its timestamp.
* <p>
* The last trace refers to the trace from which the last event was "consumed"
* at the experiment level.
*/
public class TmfExperimentContext extends TmfContext {
// ------------------------------------------------------------------------
// Constants
// ------------------------------------------------------------------------
/**
* No last trace read indicator
*/
public static final int NO_TRACE = -1;
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
private ITmfContext[] fContexts;
private ITmfEvent[] fEvents;
private int fLastTraceRead;
// ------------------------------------------------------------------------
// Constructors
// ------------------------------------------------------------------------
/**
* Standard constructor
*
* @param nbTraces
* The number of traces in the experiment
*/
public TmfExperimentContext(final int nbTraces) {
super();
fContexts = new ITmfContext[nbTraces];
fEvents = new ITmfEvent[nbTraces];
fLastTraceRead = NO_TRACE;
}
/* (non-Javadoc)
* @see org.eclipse.linuxtools.tmf.core.trace.TmfContext#dispose()
*/
@Override
public void dispose() {
for (ITmfContext context : fContexts) {
context.dispose();
}
super.dispose();
}
// ------------------------------------------------------------------------
// Accessors
// ------------------------------------------------------------------------
/**
* Get the trace contexts composing this experiment context.
*
* @return The array of trace contexts
*/
public ITmfContext[] getContexts() {
return fContexts;
}
/**
* Get the trace events located at this experiment context's location.
*
* @return The array of trace events
*/
public ITmfEvent[] getEvents() {
return fEvents;
}
/**
* Get the index of the trace that was last read (so the trace whose
* current context will match this experiment's).
*
* @return The index of the trace
*/
public int getLastTrace() {
return fLastTraceRead;
}
/**
* Set the last trace read index
*
* @param newIndex
* The new value to assign
*/
public void setLastTrace(final int newIndex) {
fLastTraceRead = newIndex;
}
// ------------------------------------------------------------------------
// Object
// ------------------------------------------------------------------------
@Override
public int hashCode() {
int result = 17;
for (int i = 0; i < fContexts.length; i++) {
result = 37 * result + fContexts[i].hashCode();
}
return result;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (!super.equals(other)) {
return false;
}
if (!(other instanceof TmfExperimentContext)) {
return false;
}
final TmfExperimentContext o = (TmfExperimentContext) other;
boolean isEqual = true;
int i = 0;
while (isEqual && (i < fContexts.length)) {
isEqual &= fContexts[i].equals(o.fContexts[i]);
i++;
}
return isEqual;
}
@Override
@SuppressWarnings("nls")
public String toString() {
StringBuilder sb = new StringBuilder("TmfExperimentContext [\n");
sb.append("\tfLocation=" + getLocation() + ", fRank=" + getRank() + "\n");
sb.append("\tfContexts=[");
for (int i = 0; i < fContexts.length; i++) {
sb.append("(" + fContexts[i].getLocation() + "," + fContexts[i].getRank() + ((i < fContexts.length - 1) ? ")," : ")]\n"));
}
sb.append("\tfEvents=[");
for (int i = 0; i < fEvents.length; i++) {
ITmfEvent event = fEvents[i];
sb.append(((event != null) ? fEvents[i].getTimestamp() : "(null)") + ((i < fEvents.length - 1) ? "," : "]\n"));
}
sb.append("\tfLastTraceRead=" + fLastTraceRead + "\n");
sb.append("]");
return sb.toString();
}
}
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