/**
 * Replication Benchmarker
 * https://github.com/score-team/replication-benchmarker/
 * Copyright (C) 2013 LORIA / Inria / SCORE Team
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package jbenchmarker.woot;

import crdt.tree.orderedtree.PositionIdentifier;

/**
 * A woot position defined as a triplet <previous, id, next>. 
 * @author urso
 */
public class WootPosition implements WootId, PositionIdentifier {
    final private WootIdentifier id;
    final private WootIdentifier ip;   // previous
    final private WootIdentifier in;   // next

    public WootPosition(WootIdentifier id, WootIdentifier ip, WootIdentifier in) {
        this.id = id;
        this.ip = ip;
        this.in = in;
    }

    @Override
    public WootIdentifier getId() {
        return id;
    }

    public WootIdentifier getIn() {
        return in;
    }

    public WootIdentifier getIp() {
        return ip;
    }
    
    @Override
    public WootPosition clone() {
        return new WootPosition(id.clone(), ip.clone(), in.clone());
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final WootPosition other = (WootPosition) obj;
        if (this.id != other.id && (this.id == null || !this.id.equals(other.id))) {
            return false;
        }
        if (this.ip != other.ip && (this.ip == null || !this.ip.equals(other.ip))) {
            return false;
        }
        if (this.in != other.in && (this.in == null || !this.in.equals(other.in))) {
            return false;
        }
        return true;
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 29 * hash + (this.id != null ? this.id.hashCode() : 0);
        hash = 29 * hash + (this.ip != null ? this.ip.hashCode() : 0);
        hash = 29 * hash + (this.in != null ? this.in.hashCode() : 0);
        return hash;
    }
}
