VisitorPicker.java

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/*
    Synthia, a data structure generator
    Copyright (C) 2019-2020 Laboratoire d'informatique formelle
    Université du Québec à Chicoutimi, Canada
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package examples.apache;
 
import ca.uqac.lif.synthia.Picker;
import ca.uqac.lif.synthia.sequence.MarkovChain;
import ca.uqac.lif.synthia.util.Freeze;
import examples.apache.LogLine.Request;
import examples.apache.LogLine.StatusCode;
import examples.apache.LogLine.Request.Method;
 
/**
 * A picker producing instances of visitors.
 * @ingroup Examples
 */
public class VisitorPicker implements Picker<Picker<LogLine>>
{
    protected Picker<Float> m_floatSource;
    
    protected Picker<String> m_ip;
    
    protected MarkovChain<String> m_map;
    
    protected Picker<Long> m_timestamp;
    
    public VisitorPicker(Picker<Long> timestamp, Picker<String> ip, MarkovChain<String> map)
    {
        super();
        m_ip = ip;
        m_map = map;
        m_timestamp = timestamp;
    }
    
    @Override
    public Picker<LogLine> pick()
    {
        MarkovChain<String> map_dup = m_map.duplicate(false);
        return new LogLinePicker(m_timestamp, new Freeze<String>(m_ip), map_dup);
    }
 
    @Override
    public Picker<Picker<LogLine>> duplicate(boolean with_state)
    {
        // TODO Auto-generated method stub
        return null;
    }
 
    @Override
    public void reset()
    {
        // TODO Auto-generated method stub
        
    }
    
    /**
     * Picker that produces log lines.
     */
    protected static class LogLinePicker implements Picker<LogLine>
    {
        /**
         * The picker for the timestamp of the log line.
         */
        protected Picker<Long> m_timestamp;
        
        /**
         * The picker for the IP address of the log line.
         */
        protected Picker<String> m_ip;
        
        /**
         * The picker for the URL of the log line.
         */
        protected Picker<String> m_url;
        
        /**
         * Creates a new log line picker.
         * @param timestamp The picker for the timestamp of the log line
         * @param ip The picker for the IP address of the log line
         * @param url The picker for the URL of the log line
         */
        public LogLinePicker(Picker<Long> timestamp, Picker<String> ip, Picker<String> url)
        {
            super();
            m_timestamp = timestamp;
            m_ip = ip;
            m_url = url;
        }
 
        @Override
        public void reset()
        {
            m_timestamp.reset();
            m_ip.reset();
            m_url.reset();
        }
 
        @Override
        public LogLine pick()
        {
            return new LogLine(m_ip.pick(), m_timestamp.pick(), 0, new Request(Method.GET, m_url.pick()), StatusCode.OK, 1000);
        }
 
        @Override
        public LogLinePicker duplicate(boolean with_state)
        {
            return new LogLinePicker(m_timestamp.duplicate(with_state), m_ip.duplicate(with_state), m_url.duplicate(with_state));
        }
    }
}