001/*
002 * This file is part of the Kompics component model runtime.
003 *
004 * Copyright (C) 2009 Swedish Institute of Computer Science (SICS) 
005 * Copyright (C) 2009 Royal Institute of Technology (KTH)
006 *
007 * This program is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU General Public License
009 * as published by the Free Software Foundation; either version 2
010 * of the License, or (at your option) any later version.
011 *
012 * This program is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
015 * GNU General Public License for more details.
016 *
017 * You should have received a copy of the GNU General Public License
018 * along with this program; if not, write to the Free Software
019 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
020 */
021package se.sics.kompics.config;
022
023import java.util.HashMap;
024import java.util.Iterator;
025import java.util.Map.Entry;
026import java.util.UUID;
027
028/**
029 *
030 * @author Lars Kroll {@literal <[email protected]>}
031 */
032public class ConfigUpdate implements Iterable<Entry<String, ConfigValue>> {
033
034    final HashMap<String, ConfigValue> updates;
035    final long versionId;
036    final UUID creator;
037
038    ConfigUpdate(HashMap<String, ConfigValue> updates, long versionId, UUID creator) {
039        this.updates = updates;
040        this.versionId = versionId;
041        this.creator = creator;
042    }
043
044    @Override
045    public Iterator<Entry<String, ConfigValue>> iterator() {
046        return updates.entrySet().iterator();
047    }
048
049    public ConfigUpdateFactory modify(UUID creator) {
050        return new Factory(creator);
051    }
052
053    public class Factory implements ConfigUpdateFactory {
054
055        private final HashMap<String, ConfigValue> updates = new HashMap<>();
056        private final UUID creator;
057
058        private Factory(UUID creator) {
059            this.creator = creator;
060        }
061
062        @Override
063        public void include(String key, ConfigValue original) {
064            updates.put(key, original);
065        }
066
067        @Override
068        public void replace(String key, ConfigValue original, Object replacement) {
069            ConfigValue newCV = Config.Builder.CVFactory.INSTANCE.create(replacement, original.version(),
070                    original.options());
071            updates.put(key, newCV);
072        }
073
074        @Override
075        public void replace(String key, ConfigValue original, Object replacement, ValueOptions options) {
076            ConfigValue newCV = Config.Builder.CVFactory.INSTANCE.create(replacement, original.version(), options);
077            updates.put(key, newCV);
078        }
079
080        @Override
081        public ConfigUpdate assemble() {
082            return new ConfigUpdate(this.updates, ConfigUpdate.this.versionId, this.creator);
083        }
084    }
085}