RemoveAnalysisHandler.java

/*******************************************************************************
 * Copyright (c) 2015, 2016 EfficiOS Inc., Philippe Proulx
 *
 * 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.internal.provisional.analysis.lami.ui.handler;

import java.io.IOException;
import java.util.List;
import java.util.stream.Collectors;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.tracecompass.internal.provisional.analysis.lami.core.LamiConfigUtils;
import org.eclipse.tracecompass.tmf.core.analysis.ondemand.OnDemandAnalysisManager;
import org.eclipse.tracecompass.tmf.ui.project.model.TmfOnDemandAnalysesElement;
import org.eclipse.tracecompass.tmf.ui.project.model.TmfUserDefinedOnDemandAnalysisElement;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * The command handler for the "Remove External Analysis" menu option.
 *
 * @author Philippe Proulx
 */
public class RemoveAnalysisHandler extends AbstractHandler {

    @Override
    public @Nullable Object execute(@Nullable ExecutionEvent event) throws ExecutionException {
        ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);

        // Selection type should have been validated by the plugin.xml
        if (!(selection instanceof IStructuredSelection)) {
            throw new IllegalStateException("Handler called on invalid selection"); //$NON-NLS-1$
        }
        IStructuredSelection sel = (IStructuredSelection) selection;
        List<?> elements = sel.toList();

        OnDemandAnalysisManager mgr = OnDemandAnalysisManager.getInstance();

        List<TmfUserDefinedOnDemandAnalysisElement> analysisElements = elements.stream()
                .filter(elem -> elem instanceof TmfUserDefinedOnDemandAnalysisElement)
                .map(elem -> (TmfUserDefinedOnDemandAnalysisElement) elem)
                .collect(Collectors.toList());

        final TmfOnDemandAnalysesElement parentElement = analysisElements.get(0).getParent();

        analysisElements.stream()
            .map(analysisElem -> analysisElem.getAnalysis())
            .forEach(analysis -> {
                /* Unregister from the manager */
                mgr.unregisterAnalysis(analysis);

                /* Remove the corresponding configuration file */
                try {
                    LamiConfigUtils.removeConfigFile(analysis.getName());
                } catch (IOException e) {
                    // Ignore this: not the end of the world
                }
            });

        /* Refresh the project explorer */
        parentElement.refresh();

        return null;
    }

}