如何在Spring-Data-Cassandara中映射UDT（用户定义类型）

Question

我正在使用Spring-data-cassandra 1.5.0M1。 我找不到在POJO中映射自定义/ UDT类型的方法。 我也看到了这篇文章Annotation for UDT by Spring data Cassandra。但我希望在新版本中添加对UDT类型的支持。 例如，我在Cassandra 3.7 DB中有Message UDT

CREATE TYPE MESSAGE (reply TEXT, time TIMESTAMP, user TEXT, patient UUID, status INT);

如何在我的实体POJO类中映射它？

@Table("conversations")

公共课堂对话{

@org.springframework.data.cassandra.mapping.PrimaryKey
private PrimaryKey primaryKey = new PrimaryKey();

@Column("status")
private Integer conversationStatus;

@Column("last_update")
private Date lastUpdate;

@Column("name")
private String name;

@Column("messages")
private List<Message> messages = new ArrayList<>();

public UUID getId() {
    return primaryKey.id;
}

public void setId(UUID id) {
    primaryKey.id = id;
}

public Integer getConversationStatus() {
    return conversationStatus;
}

public void setConversationStatus(Integer conversationStatus) {
    this.conversationStatus = conversationStatus;
}

public Date getLastUpdate() {
    return lastUpdate;
}

public void setLastUpdate(Date lastUpdate) {
    this.lastUpdate = lastUpdate;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public List<Message> getMessages() {
    return messages;
}

public void setMessages(List<Message> messages) {
    this.messages = messages;
}

@Override
public boolean equals(Object obj) {
    if (obj == null) {
        return false;
    }
    if (obj == this) {
        return true;
    }
    if (obj.getClass() != getClass()) {
        return false;
    }
    final Conversation rhs = (Conversation) obj;
    return new EqualsBuilder()
            .append(this.primaryKey.id, rhs.primaryKey.id)
            .append(this.conversationStatus, rhs.conversationStatus)
            .append(this.lastUpdate, rhs.lastUpdate)
            .append(this.name, rhs.name)
            .append(this.messages, rhs.messages)
            .isEquals();
}

@Override
public int hashCode() {
    return new HashCodeBuilder()
            .append(primaryKey)
            .append(conversationStatus)
            .append(lastUpdate)
            .append(name)
            .append(messages)
            .toHashCode();
}

@Override
public String toString() {
    return new ToStringBuilder(this)
            .append("primaryKey", primaryKey)
            .append("conversationStatus", conversationStatus)
            .append("lastUpdate", lastUpdate)
            .append("name", name)
            .append("messages", messages)
            .toString();
}

public static final class PrimaryKey implements Serializable {

    private static final long serialVersionUID = 4188262171705712608L;

    @PrimaryKeyColumn(name = "id", ordinal = 0, type = PrimaryKeyType.PARTITIONED)
    private UUID id;

    public PrimaryKey() {
    }

    public PrimaryKey(UUID id) {
        this.id = id;
    }

    public UUID getId() {
        return id;
    }

    public void setId(UUID id) {
        this.id = id;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (obj == this) {
            return true;
        }
        if (obj.getClass() != getClass()) {
            return false;
        }
        final PrimaryKey rhs = (PrimaryKey) obj;
        return new EqualsBuilder()
                .append(this.id, rhs.id)
                .isEquals();
    }

    @Override
    public int hashCode() {
        return new HashCodeBuilder()
                .append(id)
                .toHashCode();
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this)
                .append("id", id)
                .toString();
    }
}
}

提前谢谢。