Add post builder.

[Sone.git] / src / main / java / net / pterodactylus / sone / data / impl / PostBuilderImpl.java

diff --git a/src/main/java/net/pterodactylus/sone/data/impl/PostBuilderImpl.java b/src/main/java/net/pterodactylus/sone/data/impl/PostBuilderImpl.java
new file mode 100644 (file)
index 0000000..d407133
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/data/impl/PostBuilderImpl.java
@@ -0,0 +1,151 @@
+/*
+ * Sone - PostBuilderImpl.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sone.data.impl;
+
+import static com.google.common.base.Preconditions.checkState;
+
+import java.util.UUID;
+
+import net.pterodactylus.sone.data.Post;
+import net.pterodactylus.sone.data.PostBuilder;
+import net.pterodactylus.sone.data.Sone;
+
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * {@link PostBuilder} implementation that creates {@link PostImpl} objects.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class PostBuilderImpl implements PostBuilder {
+
+       /** Wether to create a post with a random ID. */
+       private boolean randomId;
+
+       /** The ID of the post. */
+       private String id;
+
+       /** The sender of the post. */
+       private Sone sender;
+
+       /** Whether to use the current time when creating the post. */
+       private boolean currentTime;
+
+       /** The time of the post. */
+       private long time;
+
+       /** The text of the post. */
+       private String text;
+
+       /** The (optional) recipient of the post. */
+       private Sone recipient;
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder copyPost(Post post) {
+               this.randomId = false;
+               this.id = post.getId();
+               this.sender = post.getSone();
+               this.currentTime = false;
+               this.time = post.getTime();
+               this.text = post.getText();
+               this.recipient = post.getRecipient();
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder randomId() {
+               randomId = true;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder withId(String id) {
+               this.id = id;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder from(Sone sender) {
+               this.sender = sender;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder currentTime() {
+               currentTime = true;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder withTime(long time) {
+               this.time = time;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder withText(String text) {
+               this.text = text;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public PostBuilder to(Sone recipient) {
+               this.recipient = recipient;
+               return this;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public Post build() {
+               checkState(!randomId && (id == null), "neither random ID or custom ID set");
+               checkState(randomId && (id != null), "both random ID and custom ID set");
+               checkState(sender != null, "sender must not be null");
+               checkState(!currentTime && (time == 0), "neither current time or custom time set");
+               checkState(currentTime && (time != 0), "both current time and custom time set");
+               checkState(!StringUtils.isBlank(text), "text must not be empty");
+               checkState((recipient == null) || !recipient.equals(sender), "sender and recipient must not be the same");
+               return new PostImpl(randomId ? UUID.randomUUID().toString() : id, sender, currentTime ? System.currentTimeMillis() : time, text).setRecipient(recipient);
+       }
+
+}