os.linux: Do not define the default kernel layout in the interface

[deliverable/tracecompass.git] / analysis / org.eclipse.tracecompass.analysis.os.linux.core / src / org / eclipse / tracecompass / analysis / os / linux / core / inputoutput / InputOutputAnalysisModule.java

/*******************************************************************************
 * Copyright (c) 2016 École Polytechnique de Montréal
 *
 * 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
 *******************************************************************************/

package org.eclipse.tracecompass.analysis.os.linux.core.inputoutput;

import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.tracecompass.analysis.os.linux.core.kernel.KernelAnalysisModule;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.DefaultEventLayout;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelTrace;
import org.eclipse.tracecompass.internal.analysis.os.linux.core.inputoutput.InputOutputStateProvider;
import org.eclipse.tracecompass.tmf.core.analysis.IAnalysisModule;
import org.eclipse.tracecompass.tmf.core.statesystem.ITmfStateProvider;
import org.eclipse.tracecompass.tmf.core.statesystem.TmfStateSystemAnalysisModule;
import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils;

/**
 * State System Module for Input Output traces
 *
 * @author Houssem Daoud
 * @since 2.0
 */
public class InputOutputAnalysisModule extends TmfStateSystemAnalysisModule {

    /** The ID of this analysis module */
    public static final String ID = "org.eclipse.tracecompass.analysis.os.linux.inputoutput"; //$NON-NLS-1$

    @Override
    protected ITmfStateProvider createStateProvider() {
        ITmfTrace trace = checkNotNull(getTrace());
        IKernelAnalysisEventLayout layout;

        if (trace instanceof IKernelTrace) {
            layout = ((IKernelTrace) trace).getKernelEventLayout();
        } else {
            /* Fall-back to the base LttngEventLayout */
            layout = DefaultEventLayout.getInstance();
        }

        return new InputOutputStateProvider(trace, layout);
    }

    @Override
    protected StateSystemBackendType getBackendType() {
        return StateSystemBackendType.FULL;
    }

    @Override
    protected Iterable<IAnalysisModule> getDependentAnalyses() {
        Set<IAnalysisModule> modules = new HashSet<>();

        ITmfTrace trace = getTrace();
        if (trace == null) {
            throw new IllegalStateException();
        }
        /*
         * This analysis depends on the LTTng kernel analysis, so it's added to
         * dependent modules.
         */
        Iterable<KernelAnalysisModule> kernelModules = TmfTraceUtils.getAnalysisModulesOfClass(trace, KernelAnalysisModule.class);
        for (KernelAnalysisModule kernelModule : kernelModules) {
            /* Only add the first one we find, if there is one */
            modules.add(kernelModule);
            break;
        }
        return modules;
    }

}