“基本”属性类型不应为“优先级”

Question

The below entity mapping I'd like to cast as a Priority object. On the getter, when I change "Short" to "Priority" and follow suite with this.priority it complains that a 'basic' attribute type should not be priority . How can I set/get this as Priority?

@Column(name = "priority", nullable = false, insertable = true, updatable = true, length = 5, precision = 0)
public Short getPriority() {
    return priority;
}

public void setPriority(Short priority) {
    this.priority = priority;
}

My Priority class:

public class Priority {
    public static final Priority TOP = new Priority("TOP", 100);

    public static final Priority PRIORITY_REMAN = new Priority("PRIORITY_REMAN", 250);

    public static final Priority PRIORITY = new Priority("PRIORITY", 500);

    public static final Priority STANDARD_REMAN = new Priority("STANDARD_REMAN", 750);

    public static final Priority STANDARD = new Priority("STANDARD", 1000);

    private final String name;
    private final Integer value;

    public Priority() {
        this.name = null;
        this.value = 0;
    }

    protected Priority(String name, int value) {
        this.name = name;
        this.value = value;
    }

    public String getName() {
        return name;
    }

    @JsonView({Views.ShutdownView.class})
    public Integer getValue() {
        return value;
    }

    public String toString() {
        return getName();
    }
}

Answer 1

You can change your Priority class to Enum and also change your getPriority method to something like this:

@Enumerated
@Column(name = "priority", nullable = false, insertable = true, updatable = true, length = 5, precision = 0)
public PriorityEnum getPriority() {
    return priority;
}

This way, the hibernate will try to save Priority property in database as a number representing order of given value in Enumeration definition. So if the value of the priority property is TOP, corresponding value in database would be 1 , if it's PRIORITY_REMAN , the value in database would be 2 and so on.

In order to change this behavior, you can change the @Enumerated annotation to

@Enumerated(EnumType.STRING)

In this case, the corresponding column in database should be some sort of String (like VARCHAR or NVARCHAR ), because hibernate would try to save the string value of TOP or PRIORITY_REMAN in database.

Answer 2

you can't, Short is a final class, so you can't extend it.

what i suggest you to do is to create another getter that you need, something like :

public Priority getJsonPriority() {
    return new Priority(this.priority);
}

or make Priority.class as Persistent Entity, and add OneToOne relation to it, which is not the best solution for you..