Moved classes from messaging package to sync package.

briar-api/src/org/briarproject/api/sync/Message.java

@@ -0,0 +1,42 @@
+package org.briarproject.api.sync;
+
+import org.briarproject.api.Author;
+
+public interface Message {
+
+	/** Returns the message's unique identifier. */
+	MessageId getId();
+
+	/**
+	 * Returns the identifier of the message's parent, or null if this is the
+	 * first message in a thread.
+	 */
+	MessageId getParent();
+
+	/**
+	 * Returns the {@link Group} to which the message belongs, or null if this
+	 * is a private message.
+	 */
+	Group getGroup();
+
+	/**
+	 * Returns the message's {@link org.briarproject.api.Author Author}, or null
+	 * if this is an anonymous message.
+	 */
+	Author getAuthor();
+
+	/** Returns the message's content type. */
+	String getContentType();
+
+	/** Returns the message's timestamp in milliseconds since the Unix epoch. */
+	long getTimestamp();
+
+	/** Returns the serialised message. */
+	byte[] getSerialised();
+
+	/** Returns the offset of the message body within the serialised message. */
+	int getBodyStart();
+
+	/** Returns the length of the message body in bytes. */
+	int getBodyLength();
+}