/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package buzzerproxy.LIBRARY;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Enger
 */
public class Serialization {

    public Serialization() {
    }

    public void writeCache(String filename, HashMap<String, ArrayList<CacheItem>> r) {
        if (filename != null) {
            try {
                //use buffering
                OutputStream file = new FileOutputStream(filename);
                OutputStream buffer = new BufferedOutputStream(file);
                ObjectOutput output = new ObjectOutputStream(buffer);
                try {
                    output.writeObject(r);
                } finally {
                    output.close();
                }
            } catch (IOException ex) {
                Logger.getLogger(Serialization.class.getName()).log(Level.SEVERE, "CacheWrite Performance Failed", ex);
            }
        } // if ( filename != null ){

    } // public void writeCache(String filename, HashMap<String, ArrayList<CacheItem>> r) {

    public HashMap<String, ArrayList<CacheItem>> readCache(String filename) {
        HashMap<String, ArrayList<CacheItem>> c = new HashMap<String, ArrayList<CacheItem>>();

        try {
            //use buffering
            InputStream file = new FileInputStream(filename);
            InputStream buffer = new BufferedInputStream(file);
            ObjectInput input = new ObjectInputStream(buffer);
            try {
                //deserialize the List
                c = (HashMap<String, ArrayList<CacheItem>>) input.readObject();
                //display its data
            } finally {
                input.close();
            }
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(Serialization.class.getName()).log(Level.SEVERE, "CacheRead Performance Failed", ex);
        } catch (IOException ex) {
            Logger.getLogger(Serialization.class.getName()).log(Level.SEVERE, "CacheRead IO Error", ex);
        }

        return c;

    } // public HashMap<String, ArrayList<CacheItem>> readCache(String filename) {
} // public class Serialization {