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EfficientRater.java
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EfficientRater.java
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import java.util.*;
public class EfficientRater implements Rater {
private String myID;
//private ArrayList<Rating> myRatings;
private HashMap<String, Rating> myRatings;//key:MovieID,value-rating
public EfficientRater(String id) {
myID = id;
myRatings = new HashMap<String, Rating>();//movie ID and rating
}
public void addRating(String item, double rating) {
//myRatings.add(new Rating(item,rating));
myRatings.put(item,(new Rating(item,rating)));
}
public boolean hasRating(String item) {
/*for(int k=0; k < myRatings.size(); k++){
if (myRatings.get(item).equals(item)){
return true;
}
}
return false;
*/
return myRatings.containsKey(item);
}
public String getID() {
return myID;
}
public double getRating(String item) {
/*for(int k=0; k < myRatings.size(); k++){
if (myRatings.get(k).getItem().equals(item)){
return myRatings.get(k).getValue();
}
}
return -1;
*/
if(hasRating(item)){
return myRatings.get(item).getValue();
}else{
return -1;
}
}
public int numRatings() {
return myRatings.size();
}
public ArrayList<String> getItemsRated() {
ArrayList<String> list = new ArrayList<String>();
/*for(int k=0; k < myRatings.size(); k++){
list.add(myRatings.get(k).getItem());
}
*/
for(String movieID : myRatings.keySet()){
list.add(movieID);
}
return list;
}
}