Java(no)Beans

Java(no)Beans Federico Fissore [email protected] @fridrik http://presentz.org/ http://www.jugtorino.it/

Federico Fissore [email protected] – JUG Torino http://www.flickr.com/photos/jeffeaton/2778624111/

Federico Fissore [email protected] – JUG Torino http://www.addictinggames.com/funny-games/pokethepenguin.jsp

Federico Fissore [email protected] – JUG Torino

Federico Fissore [email protected] – JUG Torino List strings = new
LinkedList(); strings.add(“hello!”); String s = (String) strings.get(0);

Federico Fissore [email protected] – JUG Torino List<String> strings = new
LinkedList<String>(); strings.add(“hello!”); String s = strings.get(0);

Federico Fissore [email protected] – JUG Torino @Table(uniqueConstraints = @UniqueConstraint(columnNames =
{ "name" })) @Entity public class User { @NotNull @Column(nullable = false) private String password; @NotNull @Size(min = 1, max = 255) @Column(nullable = false) private String name; @Future @Temporal(TemporalType.TIMESTAMP) private Date expiration; @Id @GeneratedValue(generator = "increment") @GenericGenerator(name = "increment", strategy = "increment") public Long getId() { return id; }

Federico Fissore [email protected] – JUG Torino @Table(uniqueConstraints = @UniqueConstraint(columnNames =
{ "name" })) @Entity @XmlRootElement public class User { @NotNull @Column(nullable = false) @XmlTransient private String password; @NotNull @Size(min = 1, max = 255) @Column(nullable = false) private String name; @Future @Temporal(TemporalType.TIMESTAMP) private Date expiration; @Id @GeneratedValue(generator = "increment") @GenericGenerator(name = "increment", strategy = "increment") public Long getId() { return id; }

Federico Fissore [email protected] – JUG Torino @NotNull @Column(nullable = false)
@XmlTransient private String password;

Federico Fissore [email protected] – JUG Torino @XmlRootElement(name=”user”) public class UserWithAddress
{ private String name; private Date expiration; private Address address; @Table @Entity @XmlRootElement public class Address { @NotNull @Column(nullable = false) private String street; @NotNull @Column(nullable = false) private String city; @Id @GeneratedValue(generator = "increment") @GenericGenerator(name = "increment", strategy = "increment") public Long getId() { return id; }

Federico Fissore [email protected] – JUG Torino http://www.flickr.com/photos/46887835@N06/4835588221/

Federico Fissore [email protected] – JUG Torino JSP JPA JSON API

Federico Fissore [email protected] – JUG Torino <body> Hello ${user.name} </body>

Federico Fissore [email protected] – JUG Torino public interface UserMapper {
Map<String, Object> getUser(long userId); Map<String, Object> getUserAddress(long userId); }

Federico Fissore [email protected] – JUG Torino <select id="getUser" parameterType="long" resultType="java.util.LinkedHashMap">
SELECT u.id, u.name, u.expiration FROM USERS u WHERE u.id = #{userId} </select>

Federico Fissore [email protected] – JUG Torino <select id="getUserAddress" parameterType="long" resultType="java.util.LinkedHashMap">
SELECT a.street, a.city FROM ADDRESSES a INNER JOIN USERS u ON (a.user_id = u.id) WHERE u.id = #{userId} </select>

Federico Fissore [email protected] – JUG Torino UserMapper userMapper = session.getMapper(UserMapper.class);
Map<String, Object> user = userMapper.getUser(42); user.put(“address”, userMapper.getUserAddress(user.get(“id”)));

Federico Fissore [email protected] – JUG Torino UserMapper userMapper = session.getMapper(UserMapper.class);
Map<String, Object> user = userMapper.getUser(42); user.put(“address”, userMapper.getUserAddress((Long) user.get(“id”)));

Federico Fissore [email protected] – JUG Torino { name: “John Doe”,
expiration: 20121118000000, address: { city: “Roncade”, street: "Via Sile, 41" } }

Federico Fissore [email protected] – JUG Torino http://www.flickr.com/photos/46887835@N06/4835588221/ Oh cavolo...

Federico Fissore [email protected] – JUG Torino Map on steroids

Federico Fissore [email protected] – JUG Torino public SteroidMap put(String key,
Object value) { inner.put(key, value); return this; } user.put(“name”,”John Doe”).put(“age”, 33);

Federico Fissore [email protected] – JUG Torino public Long l(String key)
{ return (Long) inner.get(key); } userMapper.getUserAddress(user.l(“id”));

Federico Fissore [email protected] – JUG Torino public SteroidMap map(String key)
{ return new SteroidMap( (Map<String, Object>) inner.get(key) ); } user.map(“address”).s(“street”);

Federico Fissore [email protected] – JUG Torino • Abbiamo visto che
i framework si cibano di JavaBean • Abbiamo visto che le mappe possono sostituirli, affamando i framework • Abbiamo abbozzato un'implementazione di mappa che toglie da mangiare anche al compilatore

Federico Fissore [email protected] – JUG Torino http://www.flickr.com/photos/doug88888/2953428679/

Federico Fissore [email protected] – JUG Torino http://www.flickr.com/photos/doug88888/2953428679/ Domande?

Federico Fissore [email protected] – JUG Torino Grazie

Federico Fissore [email protected] – JUG Torino Codice https://gitorious.org/jug-torino/javabean Un'implementazione https://github.com/robfrank/amphora

Federico Fissore [email protected] – JUG Torino Dove trovarmi: [email protected] https://twitter.com/fridrik
http://www.jugtorino.it/ https://github.com/ffissore Cosa faccio: http://presentz.org/ https://github.com/ffissore/presentz.js https://www.opinionage.com/ https://github.com/gabipetrovay/node-orientdb

Java(no)Beans

Java(no)Beans

More Decks by federico

Other Decks in Programming

Featured

Transcript