spring-data-cassandra component/complex type denormalized mapping - spring-data-cassandra

Question

I'm trying to use spring-data-cassandra (1.1.2.RELEASE) and I'm running into an issue with the lack of embeddable type mapping in JPA parlance.
I have an entity class like this:
#Table
public class Customer {
private UUID id;
private String name;
private Address address;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
}
and the embeddable Address class:
public class Address {
private String address;
private String city;
private String state;
private String zip;
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getZip() {
return zip;
}
public void setZip(String zip) {
this.zip = zip;
}
}
My cassandra table:
create table customer (
id uuid primary key,
name text,
address text,
city text,
state text,
zip text
);
I want the properties of Address to be mapped into the containing entity, I don't want a separate table for addresses. In JPA, I believe I'd use an #Embeddable annotation. Is there some similar construct in spring-data-cassandra?

Answer 1

Embeddable types are not yet supported by spring-data-cassandra. A feature request is available at DATACASS-167.
The only possible part of an entity to embed is the primary key. If your primary key consists of multiple fields, you can externalize that fields into a separate class and use it afterwards with the #PrimaryKey annotation.
Comment.java
#Table("comments")
public class Comment {
#PrimaryKey
private CommentKey pk;
private String text;
}
CommentKey.java
#PrimaryKeyClass
public class CommentKey implements Serializable {
private static final long serialVersionUID = -7871651389236401141L;
#PrimaryKeyColumn(ordinal = 0, type = PrimaryKeyType.PARTITIONED)
private String author;
#PrimaryKeyColumn(ordinal = 1)
private String company;
}
HTH, Mark