package net.pterodactylus.sone.data;
+import static com.google.common.base.Optional.absent;
+
import java.util.Comparator;
import com.google.common.base.Optional;
*
* @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
*/
-public interface Post {
+public interface Post extends Identified {
/** Comparator for posts, sorts descending by time. */
public static final Comparator<Post> TIME_COMPARATOR = new Comparator<Post>() {
@Override
public boolean apply(Post post) {
- return post.getTime() <= System.currentTimeMillis();
+ return (post != null) && (post.getTime() <= System.currentTimeMillis());
}
};
public String getId();
/**
+ * Returns whether this post has already been loaded.
+ *
+ * @return {@code true} if this post has already been loaded, {@code
+ * false} otherwise
+ */
+ boolean isLoaded();
+
+ /**
* Returns the Sone this post belongs to.
*
* @return The Sone of this post
public Optional<String> getRecipientId();
/**
- * Returns the recipient of this post, if any. As this method can return
- * {@link Optional#absent()} if the post has a recipient which has not yet
- * been loaded, it is recommended to use {@link #hasRecipient()} to check
- * for the presence of a recipient.
+ * Returns the recipient of this post, if any.
*
* @return The recipient of this post, or {@link Optional#absent()} if there
* is no recipient
*/
public Post setKnown(boolean known);
+ /**
+ * Shell for a post that has not yet been loaded.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’
+ * Roden</a>
+ */
+ public static class EmptyPost implements Post {
+
+ private final String id;
+
+ public EmptyPost(String id) {
+ this.id = id;
+ }
+
+ @Override
+ public String getId() {
+ return id;
+ }
+
+ @Override
+ public boolean isLoaded() {
+ return false;
+ }
+
+ @Override
+ public Sone getSone() {
+ return null;
+ }
+
+ @Override
+ public Optional<String> getRecipientId() {
+ return absent();
+ }
+
+ @Override
+ public Optional<Sone> getRecipient() {
+ return absent();
+ }
+
+ @Override
+ public long getTime() {
+ return 0;
+ }
+
+ @Override
+ public String getText() {
+ return null;
+ }
+
+ @Override
+ public boolean isKnown() {
+ return false;
+ }
+
+ @Override
+ public Post setKnown(boolean known) {
+ return this;
+ }
+
+ }
+
}