ProfileVersioner.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.rubypeople.rdt.internal.ui.preferences.formatter;

import java.util.Iterator;
import java.util.Map;

import org.rubypeople.rdt.internal.ui.preferences.formatter.ProfileManager.CustomProfile;

public class ProfileVersioner {

    public static final int VERSION_1 = 1;
    public static final int CURRENT_VERSION = VERSION_1;

    public static void updateAndComplete(CustomProfile profile) {
        final Map oldSettings = profile.getSettings();
        Map newSettings = updateAndComplete(oldSettings, profile.getVersion());
        profile.setVersion(CURRENT_VERSION);
        profile.setSettings(newSettings);
    }

    public static Map updateAndComplete(Map oldSettings, int version) {
        final Map newSettings = ProfileManager.getDefaultSettings();

        switch (version) {

        case VERSION_1:
        default:
            for (final Iterator iter = oldSettings.keySet().iterator(); iter.hasNext();) {
                final String key = (String) iter.next();
                if (!newSettings.containsKey(key)) continue;

                final String value = (String) oldSettings.get(key);
                if (value != null) {
                    newSettings.put(key, value);
                }
            }

        }
        return newSettings;
    }

    public static int getVersionStatus(CustomProfile profile) {
        final int version = profile.getVersion();
        if (version < CURRENT_VERSION)
            return -1;
        else if (version > CURRENT_VERSION)
            return 1;
        else
            return 0;
    }

}