merge completed assignment into main #1
@@ -51,45 +51,56 @@ public class Rational {
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return r1.add(r2);
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}
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// TODO: Instance method - this - other
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// Formula: a/b - c/d = (a*d - c*b) / (b*d)
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// COMPLETED - Instance method - this - other
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public Rational subtract(Rational other) {
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// YOUR CODE HERE
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return null; // Remove this line when implemented
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int newNumerator = (this.numerator * other.denominator - other.numerator * this.denominator);
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int newDenominator = this.denominator * other.denominator;
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Rational result = new Rational(newNumerator, newDenominator);
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result.simplify();
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return result;
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}
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// TODO: Static method - r1 - r2
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// COMPLETED - Static method - r1 - r2
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public static Rational subtract(Rational r1, Rational r2) {
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// YOUR CODE HERE
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return null; // Remove this line when implemented
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return r1.subtract(r2);
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}
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// TODO: Instance method - this * other
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// Formula: (a/b) * (c/d) = (a*c) / (b*d)
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// COMPLETED - Instance method - this * other
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public Rational multiply(Rational other) {
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// YOUR CODE HERE
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return null; // Remove this line when implemented
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int newNumerator = this.numerator * other.numerator;
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int newDenominator = this.denominator * other.denominator;
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Rational result = new Rational(newNumerator, newDenominator);
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result.simplify();
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return result;
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}
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// TODO: Static method - r1 * r2
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// COMPLETED - Static method - r1 * r2
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public static Rational multiply(Rational r1, Rational r2) {
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// YOUR CODE HERE
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return null; // Remove this line when implemented
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return r1.multiply(r2);
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}
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// TODO: Instance method - this / other
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// Formula: (a/b) ÷ (c/d) = (a*d) / (b*c)
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// COMPLETED - Instance method - this / other
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public Rational divide(Rational other) {
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// YOUR CODE HERE
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// HINT: Division is multiplication by reciprocal
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// Don't forget to check if other.numerator is zero!
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return null; // Remove this line when implemented
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if (other.numerator == 0) {
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throw new ArithmeticException("Caught division by zero");
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}
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int newNumerator = this.numerator * other.denominator;
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int newDenominator = this.denominator * other.numerator;
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Rational result = new Rational(newNumerator, newDenominator);
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result.simplify();
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return result;
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}
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// TODO: Static method - r1 / r2
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// COMPLETED - Static method - r1 / r2
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public static Rational divide(Rational r1, Rational r2) {
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// YOUR CODE HERE
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return null; // Remove this line when implemented
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return r1.divide(r2);
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}
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// PROVIDED - String representation
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@@ -21,15 +21,17 @@ public class Main {
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break;
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case 2:
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// TODO: Get genre ID and page from user, then call movieService.displayMoviesByGenre()
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Long genreId = getLongInput("Please set your desired genre id: ");
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Long page = getLongInput("Please set the number of the page: ");
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movieService.displayMoviesByGenre(genreId, page);
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break;
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case 3:
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// TODO (BONUS): Get movie ID from user, then call movieService.displayMovieDetails()
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Long movieId = getLongInput("Please set the movie id: ");
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movieService.displayMovieDetails(movieId);
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break;
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case 0:
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@@ -1,11 +1,9 @@
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package movie.apis;
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import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
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import java.util.List;
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/**
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* Model class representing a movie
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* Fields: id, title, genres, images
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*/
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@JsonIgnoreProperties(ignoreUnknown = true)
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public class Movie {
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private Long id;
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@@ -13,12 +11,92 @@ public class Movie {
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private List<String> genres;
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private List<String> images;
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private String year;
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private String released;
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private String imdb_id;
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private String imdb_votes;
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private String imdb_rating;
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private String meta_score;
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private String country;
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private String actors;
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private String director;
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private String writer;
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private String awards;
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private String plot;
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private String rated;
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private String runtime;
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private String type;
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// TODO: Create a constructor with all fields
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public Movie(Long id, String title, List<String> genres, List<String> images, String year, String released, String imdb_id,
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String imdb_votes, String imdb_rating, String country, String actors, String director, String writer, String awards,
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String plot, String rated, String runtime, String type) {
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// TODO: Create a simple constructor with id and title only
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this(id, title, genres, images, year, imdb_rating, country);
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this.released = released;
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this.imdb_id = imdb_id;
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this.imdb_votes = imdb_votes;
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this.actors = actors;
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this.director = director;
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this.writer = writer;
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this.awards = awards;
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this.plot = plot;
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this.rated = rated;
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this.runtime = runtime;
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this.type = type;
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}
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// TODO: Create getters and setters for all fields
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public Movie(Long id, String title, List<String> genres, List<String> images, String year, String imdb_rating, String country) {
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this(id, title);
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this.genres = genres;
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this.images = images;
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this.year = year;
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this.imdb_rating = imdb_rating;
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this.country = country;
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}
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public Movie(Long id, String title) {
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this.id = id;
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this.title = title;
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}
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public Movie() {}
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public void setId(Long id) {this.id = id;}
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public void setTitle(String title) {this.title = title;}
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public void setGenres(List<String> genres) {this.genres = genres;}
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public void setImages(List<String> images) {this.images = images;}
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public void setYear(String year) {this.year = year;}
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public void setCountry(String country) {this.country = country;}
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public void setImdb_rating(String imdb_rating) {this.imdb_rating = imdb_rating;}
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public void setActors(String actors) {this.actors = actors;}
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public void setAwards(String awards) {this.awards = awards;}
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public void setDirector(String director) {this.director = director;}
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public void setImdb_id(String imdb_id) {this.imdb_id = imdb_id;}
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public void setImdb_votes(String imdb_votes) {this.imdb_votes = imdb_votes;}
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public void setMeta_score(String meta_score) {this.meta_score = meta_score;}
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public void setPlot(String plot) {this.plot = plot;}
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public void setRated(String rated) {this.rated = rated;}
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public void setReleased(String released) {this.released = released;}
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public void setRuntime(String runtime) {this.runtime = runtime;}
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public void setType(String type) {this.type = type;}
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public void setWriter(String writer) {this.writer = writer;}
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public Long getId() {return id;}
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public String getTitle() {return title;}
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public List<String> getGenres() {return genres;}
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public List<String> getImages() {return images;}
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public String getYear() {return year;}
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public String getCountry() {return country;}
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public String getImdb_rating() {return imdb_rating;}
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public String getActors() {return actors;}
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public String getImdb_id() {return imdb_id;}
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public String getDirector() {return director;}
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public String getImdb_votes() {return imdb_votes;}
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public String getAwards() {return awards;}
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public String getMeta_score() {return meta_score;}
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public String getPlot() {return plot;}
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public String getRated() {return rated;}
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public String getReleased() {return released;}
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public String getRuntime() {return runtime;}
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public String getType() {return type;}
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public String getWriter() {return writer;}
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}
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@@ -1,5 +1,7 @@
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package movie.apis;
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import com.fasterxml.jackson.core.type.TypeReference;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.google.gson.*;
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import com.google.gson.reflect.TypeToken;
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@@ -87,44 +89,38 @@ public class MovieService {
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}
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}
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/**
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* TODO 1: Display movies for a specific genre and page
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*
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* Open this link in your browser (and check Pretty-print checkbox) to view json format:
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* https://api.meshcomp.ir/api/v1/genres/1/movies
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*
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* Steps:
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* - Call getMoviesByGenreList(genreId, page) to get JSON
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* - Parse JSON to JsonObject
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* - Get "movies" array (NOT "data")
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* - Loop through array and print: "ID: {id} | {title} ({year})"
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* - Also print total and total_pages
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*
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* PUT ALL PARSING CODE INSIDE try-catch
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*/
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public void displayMoviesByGenre(Long genreId, Long page) {
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// TODO: Write your code here
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// All parsing code must be inside try-catch
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try {
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// Your code here
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String jsonData = getMoviesByGenreList(genreId, page);
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} catch (Exception e) {
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try {
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JsonObject jsonObject = JsonParser.parseString(jsonData).getAsJsonObject();
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String moviesJson = jsonObject.get("movies").toString();
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ObjectMapper mapper = new ObjectMapper();
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List<Movie> movies = mapper.readValue(
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moviesJson,
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new TypeReference<List<Movie>>() {}
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);
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for (Movie movie : movies) {
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System.out.println("ID: " + movie.getId() + " | " + movie.getTitle() + " ( " + movie.getYear() + ")");
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}
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System.out.println("total: " + movies.size() + " | page: " + page + " | total pages: " + movies.size()/10);
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}
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catch (Exception e) {
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System.err.println("ERROR: " + e.getMessage());
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}
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}
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/**
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* BONUS: Fetch movie details from API using movie ID
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* URL format: https://api.meshcomp.ir/api/v1/movies/{movieId}
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*/
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private String getMovieById(Long movieId) {
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try {
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// TODO: Complete this method
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// String url = MOVIE_BY_ID_URL + movieId;
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// HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build();
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// HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
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// if (response.statusCode() == 200) return response.body();
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String url = MOVIE_BY_ID_URL + movieId;
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HttpRequest request = HttpRequest.newBuilder().uri(URI.create(url)).build();
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HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
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if (response.statusCode() == 200) return response.body();
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return null;
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} catch (Exception e) {
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@@ -133,58 +129,34 @@ public class MovieService {
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return null;
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}
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/*
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BONUS TODO: Display complete movie details for a given movie ID
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Open this link in your browser (and check Pretty-print checkbox) to view json format:
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https://api.meshcomp.ir/api/v1/movies/1
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INSTRUCTIONS:
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1. Call getMovieById(movieId) to get the JSON response string
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2. Check if response is null (if yes, print error and return)
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3. Parse the JSON string to JsonObject (inside try-catch)
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4. Use Gson to extract all fields from the JSON and map them to your Movie class:
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- Add missing JSON fields to your Movie class first (actors, awards, director,
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imdb_id, imdb_votes, metascore, plot, rated, released, runtime, type, writer)
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- Then use Gson to parse your json string
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5. Print all movie details in a readable format
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(PUT ALL PARSING CODE INSIDE THE EXISTING try-catch)
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*/
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/* EXAMPLE OUTPUT:
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=======================================================================
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THE SHAWSHANK REDEMPTION (1994)
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=======================================================================
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Rating: 9.3/10 | Votes: 1,738,596
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Director: Frank Darabont
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Cast: Tim Robbins, Morgan Freeman, Bob Gunton, William Sadler
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Genre: Crime, Drama
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Runtime: 142 min | Rated: R
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Country: USA | Released: 14 Oct 1994
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Plot: Two imprisoned men bond over a number of years, finding
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solace and eventual redemption through acts of common decency.
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Awards: Nominated for 7 Oscars. Another 19 wins & 30 nominations.
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=======================================================================
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*/
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public void displayMovieDetails(Long movieId) {
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// Step 1: Get JSON response from API
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String jsonResponse = getMovieById(movieId);
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// Step 2: Check if we got valid data
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// Step 3-5: Parse JSON and display details (PUT YOUR CODE INSIDE try-catch)
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if (jsonResponse == null) {
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System.out.println("Failed to get movie details for ID: " + movieId);
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return;
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}
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try {
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// TODO: Parse jsonResponse to JsonObject
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// HINT: Use JsonParser.parseString(jsonResponse).getAsJsonObject()
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// TODO: use Gson to parse the json
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// Your code here:
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JsonObject jsonObject = JsonParser.parseString(jsonResponse).getAsJsonObject();
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Gson gson = new Gson();
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Movie movie = gson.fromJson(jsonObject, Movie.class);
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System.out.println("=======================================================================");
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System.out.println(movie.getTitle() + " ( " + movie.getYear() + ")");
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System.out.println("=======================================================================");
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System.out.println("Rating: " + movie.getImdb_rating() + "/10 | Votes: " + movie.getImdb_votes());
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System.out.println("Director: " + movie.getDirector());
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System.out.println("Cast: " + movie.getActors());
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System.out.println("Genre: " + movie.getGenres());
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System.out.println("Runtime: " + movie.getRuntime() + " min | Rated: " + movie.getRated());
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System.out.println("Country: " + movie.getCountry() + " | Released: " + movie.getReleased());
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System.out.println("plot: " + movie.getPlot());
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System.out.println("Awards: " + movie.getAwards());
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System.out.println("=======================================================================");
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||||
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||||
} catch (Exception e) {
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||||
System.err.println("ERROR parsing movie details: " + e.getMessage());
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user