SiLeBAT/FSK-Lab

/***************************************************************************************************
 * Copyright (c) 2015 Federal Institute for Risk Assessment (BfR), Germany
 * <p>
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * <p>
 * You should have received a copy of the GNU General Public License along with this program. If
 * not, see <http://www.gnu.org/licenses/>.
 * <p>
 * Contributors: Department Biological Safety - BfR
 **************************************************************************************************/
package de.bund.bfr.knime.fsklab.preferences;

import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
import org.eclipse.jface.preference.IPreferenceStore;

/**
 * Initializes preference page with default paths to R2 and R3 environments.
 *
 * @author Miguel Alba
 */
public class PreferenceInitializer extends AbstractPreferenceInitializer {

    /** Path to R v.3 */
    static final String R3_PATH_CFG = "r3.path";
    static final String RESTORE_RPROFILE = "restore_profile";
    private static RPreferenceProvider cachedRProvider = null;
    public static boolean refresh;
    
    @Override
    public void initializeDefaultPreferences() {

        String rHome = "";

        if (RPathUtil.getPackagedRHome() != null) {
            rHome = RPathUtil.getPackagedRHome().getAbsolutePath();
        } else if (RPathUtil.getSystemRHome() != null) {
            rHome = RPathUtil.getSystemRHome().getAbsolutePath();
        }

        IPreferenceStore store = Plugin.getDefault().getPreferenceStore();
        store.setDefault(R3_PATH_CFG, rHome);
        store.setDefault(RESTORE_RPROFILE, true);
    }

    /** @return provider to the path to the R3 executable. */
    public static final RPreferenceProvider getR3Provider() {
        final String r3Home = Plugin.getDefault().getPreferenceStore().getString(R3_PATH_CFG);
        if (cachedRProvider == null || !cachedRProvider.getRHome().equals(r3Home)) {
            cachedRProvider = new DefaultRPreferenceProvider(r3Home);
        }

        return cachedRProvider;
    }

    public static final String getRPath() {
        return Plugin.getDefault().getPreferenceStore().getString(R3_PATH_CFG);
    }
    
    public static final boolean isRProfileToBeRestored() {
        return Plugin.getDefault().getPreferenceStore().getBoolean(RESTORE_RPROFILE);
    }
    /**
     * Invalidate the cached R3 preference provider returned by
     * {@link #getR3Provider()}, to refetch R properties (which launches an external
     * R command).
     */
    public static final void invalidateProviderCache() {
        cachedRProvider = null;
    }
}