Roster.Rosters.java Source code

Introduction

Here is the source code for Roster.Rosters.java

Source

/*
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 */
package Roster;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.beans.XMLEncoder; // simple and effective
import javax.servlet.ServletContext;
import org.json.JSONObject;
import org.json.XML;

/**
 *
 * @author bmk5282
 */
public class Rosters {
    private int n = 33;
    private Student[] students;
    private ServletContext sctx;

    public Rosters() {
    }

    // The ServletContext is required to read the data from
    // a text file packaged inside the WAR file
    public void setServletContext(ServletContext sctx) {
        this.sctx = sctx;
    }

    public ServletContext getServletContext() {
        return this.sctx;
    }

    // getPredictions returns an XML representation of
    // the Predictions array
    public void setRosters(String ps) {
    } // no-op

    public JSONObject getRosters() {
        // Has the ServletContext been set?
        if (getServletContext() == null)
            return null;

        // Have the data been read already?
        if (students == null)
            populate();

        // Convert the Predictions array into an XML document
        return toXML();
    }

    //** utilities
    private void populate() {
        String filename = "/WEB-INF/data/Roster.txt";
        InputStream in = sctx.getResourceAsStream(filename);

        // Read the data into the array of Predictions. 
        if (in != null) {
            try {
                InputStreamReader isr = new InputStreamReader(in);
                BufferedReader reader = new BufferedReader(isr);

                students = new Student[n];
                int i = 0;
                String record = null;
                while ((record = reader.readLine()) != null) {
                    String[] parts = record.split("!");
                    Student s = new Student();
                    s.setLName(parts[0]);
                    s.setFName(parts[1]);
                    s.setID(parts[2]);
                    s.setTeam(parts[3]);

                    students[i++] = s;
                }
            } catch (IOException e) {
            }
        }
    }

    private JSONObject toXML() {
        String xml = null;
        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            XMLEncoder encoder = new XMLEncoder(out);
            encoder.writeObject(students); // serialize to XML
            encoder.close();
            xml = out.toString(); // stringify
        } catch (Exception e) {
        }
        //System.out.println(xml.trim());

        JSONObject jobt = XML.toJSONObject(xml);
        //System.out.println(jobt);

        return jobt;
    }
}