persistence.JSONReader.java Source code

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Here is the source code for persistence.JSONReader.java

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/*
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package persistence;

import base.JSONModel;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.AbstractQueue;
import java.util.PriorityQueue;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

/**
 * A file reader class with static methods
 * @author tan
 * 
 */
public class JSONReader {
    private static BufferedReader file;

    /**
     *
     * @param file
     * @throws FileNotFoundException
     */
    public static void setFile(File file) throws FileNotFoundException {
        JSONReader.file = new BufferedReader(new FileReader(file));
    }

    /**
     * 
     * @param c the class of the Models expected
     * @return a List of Models from a JSON formatted file.
     * @throws java.io.IOException
     * @throws org.json.simple.parser.ParseException
     */
    public static AbstractQueue<JSONModel> loadModels(Class c)
            throws IOException, ParseException, InstantiationException, IllegalAccessException {
        AbstractQueue<JSONModel> modelQueue = new PriorityQueue();
        JSONModel model;
        JSONParser parser = new JSONParser();

        String json = file.readLine();
        while (json != null) {
            model = (JSONModel) c.newInstance();
            JSONObject jsonObject = (JSONObject) parser.parse(json);
            model.fromJSON(jsonObject);
            modelQueue.add(model);
            json = file.readLine();
        }

        return modelQueue;
    }

}