E.2 The com.mediamania.content package
This package includes classes that model information about the media
content that is sold or rented at Media Mania stores.
E.2.1 com.mediamania.content.ContentQueries
1 package com.mediamania.content;
2
3 import java.util.Iterator;
4 import java.util.Collection;
5 import javax.jdo.*;
6
7 public class ContentQueries {
8 public static Studio getStudioByName(PersistenceManager pm,
9 String studioName) {
10 Extent studioExtent = pm.getExtent(com.mediamania.content.Studio.class,
11 false);
12 Query query = pm.newQuery(studioExtent, "name == studioName");
13 query.declareParameters("String studioName");
14 Collection result = (Collection) query.execute(studioName);
15 Iterator iter = result.iterator( );
16 Studio studio = (Studio) (iter.hasNext() ? iter.next( ) : null);
17 query.close(result);
18 return studio;
19 }
20 public static MediaPerson getMediaPerson(PersistenceManager pm,
21 String person) {
22 Extent personExtent = pm.getExtent(
23 com.mediamania.content.MediaPerson.class, false);
24 Query query = pm.newQuery(personExtent, "mediaName == person");
25 query.declareParameters("String person");
26 Collection result = (Collection) query.execute(person);
27 Iterator iter = result.iterator( );
28 MediaPerson mediaPerson =
29 (MediaPerson) (iter.hasNext() ? iter.next( ) : null);
30 query.close(result);
31 return mediaPerson;
32 }
33 }
E.2.2 com.mediamania.content.Game
1 package com.mediamania.content;
2
3 import java.util.Date;
4
5 public class Game extends MediaContent {
6 private static String[] allRatings = {"EC","K-A","E","T","M","AO","RP"};
7
8 public Game( ) {
9 }
10 public Game(String title, Studio studio, Date releaseDate,
11 String rating, String reasons) {
12 super(title, studio, releaseDate, rating, reasons);
13 }
14
15 public boolean validRating(String rating) {
16 for (int i = 0; i < allRatings.length; ++i) {
17 if (rating.equals(allRatings[i])) return true;
18 }
19 return false;
20 }
21 }
E.2.3 com.mediamania.content.MediaContent
1 package com.mediamania.content;
2
3 import java.util.Date;
4 import java.util.Set;
5 import java.util.HashSet;
6 import java.util.Collections;
7 import java.text.SimpleDateFormat;
8 import java.lang.StringBuffer;
9
10 import com.mediamania.store.MediaItem;
11
12 public abstract class MediaContent {
13 private static SimpleDateFormat yearFmt = new SimpleDateFormat("yyyy");
14 private String title;
15 private Studio studio;
16 private Date releaseDate;
17 private String rating;
18 private String ratingReasons;
19 private Set mediaItems; // MediaItem
20
21 protected MediaContent( )
22 { }
23 public MediaContent(String title, Studio studio, Date releaseDate,
24 String rating, String reasons) {
25 this.title = title;
26 this.studio = studio;
27 this.releaseDate = releaseDate;
28 this.rating = rating;
29 ratingReasons = reasons;
30 mediaItems = new HashSet( );
31 }
32 public String getTitle( ) {
33 return title;
34 }
35 public Studio getStudio( ) {
36 return studio;
37 }
38 public Date getReleaseDate( ) {
39 return releaseDate;
40 }
41 public String getRating( ) {
42 return rating;
43 }
44 public String getRatingReasons( ) {
45 return ratingReasons;
46 }
47 public abstract boolean validRating(String rating);
48 public Set getMediaItems( ) {
49 return Collections.unmodifiableSet(mediaItems);
50 }
51 public void addMediaItem(MediaItem item) {
52 mediaItems.add(item);
53 }
54 public String getDescription( ) {
55 StringBuffer buffer = new StringBuffer( );
56 buffer.append(title);
57 buffer.append(", ");
58 buffer.append(studio.getName( ));
59 buffer.append(", release date: ");
60 buffer.append(formatReleaseDate( ));
61 buffer.append(", rating: ");
62 buffer.append(rating);
63 buffer.append(", reasons for rating: ");
64 buffer.append(ratingReasons);
65 return buffer.toString( );
66 }
67 public static Date parseReleaseDate(String val) {
68 Date date = null;
69 try {
70 date = yearFmt.parse(val);
71 } catch (java.text.ParseException exc) { }
72 return date;
73 }
74 public String formatReleaseDate( ) {
75 return yearFmt.format(releaseDate);
76 }
77 }
E.2.4 com.mediamania.content.MediaPerson
1 package com.mediamania.content;
2
3 import java.util.Date;
4 import java.util.Set;
5 import java.util.HashSet;
6 import java.util.Collections;
7
8 public class MediaPerson {
9 private String mediaName;
10 private String firstName;
11 private String lastName;
12 private Date birthDate;
13 private Set actingRoles; // Role
14 private Set moviesDirected; // Movie
15
16 private MediaPerson( )
17 { }
18 public MediaPerson(String mediaName) {
19 this.mediaName = mediaName;
20 actingRoles = new HashSet( );
21 moviesDirected = new HashSet( );
22 }
23 public MediaPerson(String mediaName, String firstName, String lastName,
24 Date birthDate) {
25 this.mediaName = mediaName;
26 this.firstName = firstName;
27 this.lastName = lastName;
28 this.birthDate = birthDate;
29 actingRoles = new HashSet( );
30 moviesDirected = new HashSet( );
31 }
32 public String getName( ) {
33 return mediaName;
34 }
35 public String getFirstName( ) {
36 return firstName;
37 }
38 public String getLastName( ) {
39 return lastName;
40 }
41 public Date getBirthDate( ) {
42 return birthDate;
43 }
44 public void addRole(Role role) {
45 actingRoles.add(role);
46 }
47 public Set getRoles( ) {
48 return Collections.unmodifiableSet(actingRoles);
49 }
50 public void addMoviesDirected(Movie movie) {
51 moviesDirected.add(movie);
52 }
53 public Set getMoviesDirected( ) {
54 return Collections.unmodifiableSet(moviesDirected);
55 }
56 }
E.2.5 com.mediamania.content.Movie
1 package com.mediamania.content;
2
3 import java.util.Date;
4 import java.util.Set;
5 import java.util.HashSet;
6 import java.util.Collections;
7 import java.lang.StringBuffer;
8
9 public class Movie extends MediaContent {
10 private static String[] allRatings = {"G","PG","PG-13","R","NC-17"};
11 private String genres;
12 private Set cast; // Role
13 private MediaPerson director;
14 private int runningTime;
15 private String webSite;
16
17 private Movie( )
18 { }
19 public Movie(String title, Studio studio, Date releaseDate,
20 String rating, String reasons, String genres, int runningTime,
21 MediaPerson director) {
22 super(title, studio, releaseDate, rating, reasons);
23 this.runningTime = runningTime;
24 this.genres = genres;
25 cast = new HashSet( );
26 this.director = director;
27 if (director != null) director.addMoviesDirected(this);
28 }
29 public boolean validRating(String rating) {
30 for (int i = 0; i < allRatings.length; ++i) {
31 if (rating.equals(allRatings[i])) return true;
32 }
33 return false;
34 }
35 public MediaPerson getDirector( )
36 {
37 return director;
38 }
39 public Set getCast( ) {
40 return Collections.unmodifiableSet(cast);
41 }
42 public void addRole(Role r) {
43 cast.add(r);
44 }
45 public void removeRole(Role r) {
46 cast.remove(r);
47 }
48 public String getDescription( ) {
49 StringBuffer buffer = new StringBuffer( );
50 buffer.append("Movie: ");
51 buffer.append(super.getDescription( ));
52 buffer.append(", genre: ");
53 buffer.append(genres);
54 buffer.append(" running time: ");
55 buffer.append(runningTime);
56 return buffer.toString( );
57 }
58 }
E.2.6 com.mediamania.content.Role
1 package com.mediamania.content;
2
3 public class Role {
4 private String name;
5 private MediaPerson actor;
6 private Movie movie;
7
8 private Role( )
9 { }
10 public Role(String name, MediaPerson actor, Movie movie) {
11 this.name = name;
12 this.actor = actor;
13 this.movie = movie;
14 actor.addRole(this);
15 movie.addRole(this);
16 }
17 public String getName( ) {
18 return name;
19 }
20 public MediaPerson getActor( ) {
21 return actor;
22 }
23 public Movie getMovie( ) {
24 return movie;
25 }
26 public void setMovie(Movie theMovie) {
27 movie = theMovie;
28 }
29 }
E.2.7 com.mediamania.content.Studio.java
1 package com.mediamania.content;
2
3 import java.util.Set;
4 import java.util.HashSet;
5 import java.util.Collections;
6
7 public class Studio {
8 private String name;
9 private Set content; // MediaContent
10
11 private Studio( )
12 { }
13 public Studio(String studioName) {
14 name = studioName;
15 content = new HashSet( );
16 }
17 public String getName( ) {
18 return name;
19 }
20 public Set getContent( ) {
21 return Collections.unmodifiableSet(content);
22 }
23 public void addContent(MediaContent mc) {
24 content.add(mc);
25 }
26 public void removeContent(MediaContent mc) {
27 content.remove(mc);
28 }
29 }
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