/**
 * WebPageReader class
 * Given a URL, can return information about that page.
 **/
import java.net.*;
import java.io.*;
import java.util.*;

public class WebPageReader {
  
  //// Fields
  private URL url;
  private URLConnection con;
  private BufferedReader stream;
  
  ///// Methods
  /**
   * Open with a URL
   **/
  public WebPageReader(String s){
    // Create the URL and the connection to it
    try {
    url = new URL(s);
    con = url.openConnection();
    stream = new BufferedReader(new InputStreamReader(con.getInputStream()));
    }
    catch (Exception e) {
      System.out.println("An error opening the URL occurred.");
      System.out.println(e.getMessage());}
    
  }
  
  /**
   * A WebPageReader is ready to read if the stream is ready
   **/
  public boolean readyToRead(){
    try {return stream.ready();}
    catch (Exception e) {System.out.println("I/O error occurred.");
        System.out.println(e.getMessage());
        return false;}
  }
  /**
   * The type of the material at the other end of the URL is
   * the contentType from the URLConnection
   **/
  public String getType(){return con.getContentType();}
  
  /**
   * Next line is the next line from the material at the
   * other end of the URL.  We read it like a file.
   * There is more material there as long as readyToRead() returns
   * true.  We may also read a null when it's done.
   **/
  public String nextLine(){
    try {return stream.readLine();}
       catch (Exception e) {System.out.println("I/O error occurred.");
        System.out.println(e.getMessage());
        return null;}
  }
 
}