Replaced sync XSD by custom objects

* Removed JAXB dependencies
* Added User, Message and TextMessage
* Changed version to 0.2-alpha in POM

src/main/java/envoy/data/Message.java

@@ -0,0 +1,97 @@
+package envoy.data;
+
+import java.io.Serializable;
+import java.util.Date;
+
+/**
+ * Represents a unique message with a unique, numeric ID. Further metadata
+ * includes the sender and recipient {@link User}s, as well as the creation
+ * date and the current {@link MessageStatus}.<br>
+ * <br>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>Message.java</strong><br>
+ * Created: <strong>28.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Common v0.2-alpha
+ */
+public abstract class Message implements Serializable {
+
+	private final long	id;
+	private final User	sender, recipient;
+	private final Date	date;
+
+	private MessageStatus status;
+
+	private static final long serialVersionUID = -4393477412979594435L;
+
+	/**
+	 * Initializes a {@link Message} from the client's perspective. The current date
+	 * is used as the message date and the status is set to
+	 * {@link MessageStatus#WAITING}.
+	 * 
+	 * @param id        unique ID
+	 * @param sender    the user who sends the message
+	 * @param recipient the user who receives the message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public Message(long id, User sender, User recipient) {
+		this.id			= id;
+		this.sender		= sender;
+		this.recipient	= recipient;
+		date			= new Date();
+		status			= MessageStatus.WAITING;
+	}
+
+	/**
+	 * @return the ID of this message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public long getId() { return id; }
+
+	/**
+	 * @return the sender of this message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public User getSender() { return sender; }
+
+	/**
+	 * @return the recipient of this message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public User getRecipient() { return recipient; }
+
+	/**
+	 * @return the date at which this message was created
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public Date getDate() { return date; }
+
+	/**
+	 * @return the current status of this message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public MessageStatus getStatus() { return status; }
+
+	/**
+	 * Changes the current {@link MessageStatus} to the next logical status.<br>
+	 * <br>
+	 * The underlying order is as follows:
+	 * <ol>
+	 * <li>{@link MessageStatus#WAITING}
+	 * <li>{@link MessageStatus#SENT}
+	 * <li>{@link MessageStatus#RECEIVED}
+	 * <li>{@link MessageStatus#READ}
+	 * </ol>
+	 * 
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public void nextStatus() {
+		if (status == MessageStatus.READ) throw new IllegalStateException("Message status READ is already reached");
+		status = MessageStatus.values()[status.ordinal() + 1];
+	}
+
+	public static enum MessageStatus {
+		WAITING, SENT, RECEIVED, READ
+	}
+}

src/main/java/envoy/data/TextMessage.java

@@ -0,0 +1,54 @@
+package envoy.data;
+
+import java.text.SimpleDateFormat;
+
+/**
+ * Represents a {@link Message} with content that is comprised of text.<br>
+ * <br>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>TextMessage.java</strong><br>
+ * Created: <strong>28.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Common v0.2-alpha
+ */
+public class TextMessage extends Message {
+
+	private final String content;
+
+	private static final long serialVersionUID = 1538164720632899917L;
+
+	/**
+	 * Initializes a {@link TextMessage} from the client's perspective. The current
+	 * date
+	 * is used as the message date and the status is set to
+	 * {@link MessageStatus#WAITING}.
+	 * 
+	 * @param id        unique ID
+	 * @param sender    the user who sends the message
+	 * @param recipient the user who receives the message
+	 * @param content   the content of the message
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public TextMessage(long id, User sender, User recipient, String content) {
+		super(id, sender, recipient);
+		this.content = content;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("TextMessage[id=%d,sender=%s,recipient=%s,date=%s,status=%s,content=%s]",
+				getId(),
+				getSender(),
+				getRecipient(),
+				new SimpleDateFormat("dd.MM.yyyy hh:mm:ss").format(getDate()),
+				getStatus(),
+				content);
+	}
+
+	/**
+	 * @return the content of this {@link TextMessage}
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public String getContent() { return content; }
+}

src/main/java/envoy/data/User.java

@@ -0,0 +1,71 @@
+package envoy.data;
+
+import java.io.Serializable;
+
+/**
+ * Represents a unique user with a unique, numeric ID, a name and a current
+ * {@link UserStatus}.<br>
+ * <br>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>User.java</strong><br>
+ * Created: <strong>28.12.2019</strong><br>
+ * 
+ * @author Kai S. K. Engelbart
+ * @since Envoy Common v0.2-alpha
+ */
+public class User implements Serializable {
+
+	private final long		id;
+	private final String	name;
+
+	private UserStatus status;
+
+	private static final long serialVersionUID = 3530947374856708236L;
+
+	/**
+	 * Initializes a {@link User}. The {@link UserStatus} is set to
+	 * {@link UserStatus#OFFLINE}.
+	 * 
+	 * @param id   unique ID
+	 * @param name user name
+	 * @since Envoy Client v0.2-alpha
+	 */
+	public User(long id, String name) {
+		this.id		= id;
+		this.name	= name;
+		status		= UserStatus.OFFLINE;
+	}
+
+	@Override
+	public String toString() { return String.format("User[id=%d,name=%s,status=%s]", id, name, status); }
+
+	/**
+	 * @return the ID of this {@link User}
+	 * @since Envoy Client v0.2-alpha
+	 */
+	public long getId() { return id; }
+
+	/**
+	 * @return the name of this {@link User}
+	 * @since Envoy Client v0.2-alpha
+	 */
+	public String getName() { return name; }
+
+	/**
+	 * @return the current status of this user
+	 * @since Envoy Client v0.2-alpha
+	 */
+	public UserStatus getStatus() { return status; }
+
+	/**
+	 * Sets the current status of this user
+	 * 
+	 * @param status the status to set
+	 * @since Envoy Client v0.2-alpha
+	 */
+	public void setStatus(UserStatus status) { this.status = status; }
+
+	public static enum UserStatus {
+		ONLINE, AWAY, BUSY, OFFLINE;
+	}
+}

src/main/java/envoy/schema/MessageState.java

@@ -1,22 +0,0 @@
-package envoy.schema;
-
-import javax.xml.bind.annotation.XmlEnum;
-import javax.xml.bind.annotation.XmlType;
-
-/**
- * Project: <strong>envoy-common</strong><br>
- * File: <strong>MessageState.java</strong><br>
- * Created: <strong>11 Oct 2019</strong><br>
- * 
- * @author Kai S. K. Engelbart
- */
-@XmlType(name = "")
-@XmlEnum
-public enum MessageState {
-
-	Waiting, Sent, Received, Read;
-
-	public String value() { return name(); }
-
-	public static MessageState fromValue(String v) { return valueOf(v); }
-}

src/main/java/envoy/schema/UserStatus.java

@@ -1,22 +0,0 @@
-package envoy.schema;
-
-import javax.xml.bind.annotation.XmlEnum;
-import javax.xml.bind.annotation.XmlType;
-
-/**
- * Project: <strong>envoy-common</strong><br>
- * File: <strong>UserStatus.java</strong><br>
- * Created: <strong>27 Oct 2019</strong><br>
- * 
- * @author Maximilian K&auml;fer
- */
-@XmlType(name = "")
-@XmlEnum
-public enum UserStatus {
-
-	Online, DoNotDisturb, AFK, Offline;
-
-	public String value() { return name(); }
-
-	public static UserStatus fromValue(String v) { return valueOf(v); }
-}