design patterns : prototype

design-pattern/gof/src/prototype/after/App.java

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+package prototype.after;
+
+public class App {
+
+    public static void main(String[] args) throws CloneNotSupportedException {
+        GithubRepository repository = new GithubRepository();
+        repository.setUser("whiteship");
+        repository.setName("live-study");
+
+        GithubIssue githubIssue = new GithubIssue(repository);
+        githubIssue.setId(1);
+        githubIssue.setTitle("1주차 과제: JVM은 무엇이며 자바 코드는 어떻게 실행하는 것인가.");
+
+        String url = githubIssue.getUrl();
+        System.out.println(url);
+
+        GithubIssue clone = (GithubIssue) githubIssue.clone();
+        System.out.println(clone.getUrl());
+
+        System.out.println(clone != githubIssue);
+        System.out.println(clone.equals(githubIssue));
+        System.out.println(clone.getClass() == githubIssue.getClass());
+
+        // shallow copy (default)
+        System.out.println(clone.getRepository() == githubIssue.getRepository());
+    }
+
+}

design-pattern/gof/src/prototype/after/GithubIssue.java

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+package prototype.after;
+
+import java.util.Objects;
+
+public class GithubIssue implements Cloneable {
+
+    private int id;
+
+    private String title;
+
+    private GithubRepository repository;
+
+    public GithubIssue(GithubRepository repository) {
+        this.repository = repository;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public GithubRepository getRepository() {
+        return repository;
+    }
+
+    public String getUrl() {
+        return String.format("https://github.com/%s/%s/issues/%d",
+                repository.getUser(),
+                repository.getName(),
+                this.getId());
+    }
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+
+        // deep copy
+//        GithubRepository repository = new GithubRepository();
+//        repository.setUser(this.repository.getUser());
+//        repository.setName(this.repository.getName());
+//
+//        GithubIssue githubIssue = new GithubIssue(repository);
+//        githubIssue.setId(this.id);
+//        githubIssue.setTitle(this.title);
+//        return githubIssue;
+        return super.clone();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        GithubIssue that = (GithubIssue) o;
+        return id == that.id && Objects.equals(title, that.title) && Objects.equals(repository, that.repository);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, title, repository);
+    }
+}

design-pattern/gof/src/prototype/after/GithubRepository.java

@@ -0,0 +1,24 @@
+package prototype.after;
+
+public class GithubRepository {
+
+    private String user;
+
+    private String name;
+
+    public String getUser() {
+        return user;
+    }
+
+    public void setUser(String user) {
+        this.user = user;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

design-pattern/gof/src/prototype/before/App.java

@@ -0,0 +1,18 @@
+package prototype.before;
+
+public class App {
+
+    public static void main(String[] args) {
+        GithubRepository repository = new GithubRepository();
+        repository.setUser("whiteship");
+        repository.setName("live-study");
+
+        GithubIssue githubIssue = new GithubIssue(repository);
+        githubIssue.setId(1);
+        githubIssue.setTitle("1주차 과제: JVM은 무엇이며 자바 코드는 어떻게 실행하는 것인가.");
+
+        String url = githubIssue.getUrl();
+        System.out.println(url);
+    }
+
+}

design-pattern/gof/src/prototype/before/GithubIssue.java

@@ -0,0 +1,41 @@
+package prototype.before;
+
+public class GithubIssue {
+
+    private int id;
+
+    private String title;
+
+    private GithubRepository repository;
+
+    public GithubIssue(GithubRepository repository) {
+        this.repository = repository;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public GithubRepository getRepository() {
+        return repository;
+    }
+
+    public String getUrl() {
+        return String.format("https://github.com/%s/%s/issues/%d",
+                repository.getUser(),
+                repository.getName(),
+                this.getId());
+    }
+}

design-pattern/gof/src/prototype/before/GithubRepository.java

@@ -0,0 +1,24 @@
+package prototype.before;
+
+public class GithubRepository {
+
+    private String user;
+
+    private String name;
+
+    public String getUser() {
+        return user;
+    }
+
+    public void setUser(String user) {
+        this.user = user;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}