source: tmcsimulator/trunk/src/atmsdriver/model/LoopDetector.java @ 202

package atmsdriver.model;



import java.util.ArrayList;

import java.util.List;

import org.w3c.dom.Document;

import org.w3c.dom.Element;



/** 

 *  A LoopDetector represents a single detector for a single lane in a network.

 * 

 *  A LoopDetector contains static meta data, and three dynamic attributes: vol,

 *  occ, and spd.

 *

 * @author John A. Torres

 * @version 09/10/2017

 */

public class LoopDetector 

{

    /* static data */

    final public int loopID;

    final public String loopLocation;

    

    /* dynamic data */

    public int vol;

    public float occ;

    

    /**

     * Constructs a LoopDetector from loopID, loopLocation, and laneNum

     * 

     * @param loopID

     * @param loopLocation

     * @param laneNum 

     */

    public LoopDetector(int loopID, String loopLocation)

    {

        /* Set static data */

        this.loopID = loopID;

        this.loopLocation = loopLocation;

        

        /* Init dynamic data */

        this.vol = 0;

        this.occ = 0;

    }

    

    /**

     * XML tags used for toXML() method.

     */

    private static enum XML_TAGS

    {

        LOOP_ID("Loop_ID"),

        LOOP_LOCATION("Loop_Location"),

        VOL("Vol"),

        OCC("Occ"),

        LOOP("Loop");

        

        String tag;

        

        private XML_TAGS(String n)

        {

            tag = n;

        }

    }

    

    /** Returns a string of highways data. If MetaDataOnly is true, you get a full

     *  dump of the highways meta data, which does not include dynamic loop values,

     *  and does include the string location names. If MetaDataOnly is false,

     *  dynamic loop values are included, and unnecessary information like string

     *  location values are included.

     * 

     *  The FEPSimulator takes in the toCondensedFormat() output, with a MetaDataOnly

     *  value of false, over the socket.

     * 

     *  The MetaDataOnly flag should be used to get a full dump of the highways

     *  information. This was used to get the highways_fullmap.txt output.

     * 

     * @param MetaDataOnly Whether you want meta data, or a full dump for FEPSim

     * @return String, highways data in condensed format

     */

    public String toCondensedFormat(boolean MetaDataOnly)

    {

        StringBuilder build = new StringBuilder();

        build.append(Integer.toString(this.loopID));

        build.append(" ");

        if(!MetaDataOnly)

        {

            build.append(" ");

            build.append(this.occ);

            build.append(" ");

            build.append(this.vol);

            build.append(" ");

        }

        build.append(this.loopLocation);

        build.append("\n");

        return build.toString();

    }

    

    /** 

     * Updates loop detector dynamic attributes.

     * @param vol volume

     * @param occ occupancy

     * @param spd speed

     */

    public void updateLoop(int vol, float occ)

    {

        this.vol = vol;

        this.occ = occ;

    }



    /**

     * Returns the LoopDetector data in XMLFormat

     * 

     * @param currElem The current XML <LoopDetector> element

     */

    public void toXML(Element currElem)

    {

        Document theDoc = currElem.getOwnerDocument();

        

        Element loopElement = theDoc.createElement(XML_TAGS.LOOP.tag);

        currElem.appendChild(loopElement);

        

        Element loopIDElement = theDoc.createElement(XML_TAGS.LOOP_ID.tag);

        loopIDElement.appendChild(theDoc.createTextNode(String.valueOf(this.loopID)));

        loopElement.appendChild(loopIDElement);

        

        Element loopLocElement = theDoc.createElement(XML_TAGS.LOOP_LOCATION.tag);

        loopLocElement.appendChild(theDoc.createTextNode(this.loopLocation));

        loopElement.appendChild(loopLocElement);

        

        Element volElement = theDoc.createElement(XML_TAGS.VOL.tag);

        volElement.appendChild(theDoc.createTextNode(String.valueOf(this.vol)));

        loopElement.appendChild(volElement);

        

        Element occElement = theDoc.createElement(XML_TAGS.OCC.tag);

        occElement.appendChild(theDoc.createTextNode(String.valueOf(this.occ)));

        loopElement.appendChild(occElement);

    }

    

    /**

     * Enum for highway status dot colors. Each color has associated volume

     * and occupancy constants.

     *

     * @author John A. Torres, jdalbey

     * @version 10/11/2017

     */

    public static enum DOTCOLOR {



        RED(1, 0.06f),    // "Stopped" is less than 25mph

        YELLOW(3,0.059f), // speed = 26

        GREEN(0,0);

        

        // All the first letters of the values, in order.

        public static String allLetters = "RYG";

        

        private int vol;  /* volume */

        private float occ;  /* occupancy */      

        

        private DOTCOLOR(int v, float o)

        {

            vol = v;

            occ = o;

        }

        /**

         * Return the first letter of this enum.

         *

         * @return String first letter of this enum.

         */

        public String getLetter() {

            return this.toString().substring(0, 1);

        }



        public int volume()

        {

            return vol;

        }

        public float occupancy()

        {

            return occ;

        }

        /**

         * Returns a dot color given its first character.

         *

         * @param letter the first character of a dot color

         * @return dot color corresponding to letter

         * @pre letter must be one of allLetters

         */

        public static DOTCOLOR toDotColor(String letter) {

            return values()[allLetters.indexOf(letter.charAt(0))];

        }

    }  

    

}