medialistfrombill

import java.util.ArrayList;
import java.util.Collections;

/**This class encapsulates a list of media items in a user's collection.
*  The list is implemented as either an ArrayList or array of type MediaItem.
*  Media items are either a book (electronic format), movie, podcast, or song.
*  Each type of media item is represented by an instance of the Book, Movie, Podcast, or Song class.
*  These classes are subclasses of MediaItem. The list stores media items as
*  references of type MediaItem.
**/
public class MediaList {

   private ArrayList<MediaItem> itemList;

   public MediaList(){
      itemList = new ArrayList<MediaItem>();
   }

   public void addItem(MediaItem newItem){
      itemList.add(newItem);
   }

   public boolean containsItem(String targetTitle, String targetAuthor){
      for (MediaItem target: itemList){
         if (target.getTitle().equalsIgnoreCase(targetTitle) && target.getAuthor().equalsIgnoreCase(targetAuthor))
            return true;
         }
      return false;
   }

   public boolean removeItem(String targetTitle, String targetAuthor){
       for (MediaItem target: itemList){
         if (target.getTitle().equalsIgnoreCase(targetTitle) && target.getAuthor().equalsIgnoreCase(targetAuthor)){
            itemList.remove(target);
            return true;
            }
         }
      return false;
   }

   public String[] getItemListAsStringArray(){
      if (isEmpty() == true){
         String[] mediaEmptyTest = new String[0];
         return mediaEmptyTest;
         }
      String[] mediaInfo = new String[itemList.size()];
      int count = 0;
      for (MediaItem targets: itemList){
         mediaInfo[count] = targets.toString();
         count++;
         }
      return mediaInfo;
   }

   public String[] getAllItemsByTitle(String targetTitle){
      int titleCount = 0;
      ArrayList<MediaItem> titleList = new ArrayList<MediaItem>();
      for (MediaItem target: itemList){
         if(target.getTitle().equalsIgnoreCase(targetTitle)){
            titleList.add(target);
         }
      }
      String[] targetTitles = new String[titleList.size()];
      for (MediaItem targets : titleList){
         targetTitles[titleCount] = targets.toString();
         titleCount++;
         }
      return targetTitles;
   }

   public String[] getAllItemsByAuthor(String targetAuthor){
      int authorCount = 0;
      ArrayList<MediaItem> authorList = new ArrayList<MediaItem>();
      for (MediaItem target: itemList){
         if(target.getAuthor().equalsIgnoreCase(targetAuthor)){
            authorList.add(target);
         }
      }
      String[] targetAuthors = new String[authorList.size()];
      for (MediaItem targets : authorList){
         targetAuthors[authorCount] = targets.toString();
         authorCount++;
         }
      return targetAuthors;
   }

   public String[] getSortedListOfAuthors(){
      ArrayList<String> sortedList = new ArrayList<String>();
      for (MediaItem targets : itemList){
         sortedList.add(targets.getAuthor());
         }
      Collections.sort(sortedList);
      String[] sortedArray = new String[sortedList.size()];
      int counter = 0;
      for (String author: sortedList){
         sortedArray[counter] = author;
         counter++;
         }
      return sortedArray;

   }

   public int getNumItems(){
      return itemList.size();
   }

   public boolean isEmpty(){
      return itemList.isEmpty();
   }

   /****** Private, "helper" method section. You may define any private
           methods you want below.  This is not a requirement of this project.
           These methods perform tasks that make the code above simler and easier to
           develop, troubleshoot, and understand.
    ******/
 }