CODEWITHSUNDEEP
javaplayframework
josef.van.niekerk
josef.van.niekerk

Reputation: 12121

Injecting fields into Java JPA fields

I'm no pro with Java, so I need a little help. I'm using the Play Framework.

I have an Entity class which extends GenericModel with fields like the following:

@Column(name = "description")
private String description;

I want to add an additional field using a getter, let's call it getToString, which basically contains a read only string with the string representation of the entity.

I need this because the object is getting sent as a JSON response, and my JavaScript will read this field, and display it where for example the entity needs to be represented as a string.

How do I go about doing this?

Upvotes: 1

Views: 352

Answers (3)

josef.van.niekerk
josef.van.niekerk

Reputation: 12121

The problem I'm having was a side effect of using GsonBuilder. The builder doesn't appear to be parsing getters and setters, unless the source of the library is modified, which I'm not willing to do.

Upvotes: 1

Pere Villega
Pere Villega

Reputation: 16439

For what I understand (please correct me if I'm wrong) you want a read-only method that will return a string representation (JSon format) of the entity.

You could just override the default toString method:

@Override
public String toString() {
     return "your_json_string";
}

and call it when needed

Upvotes: 0

Simone Gianni
Simone Gianni

Reputation: 11672

I'm no expert on the Play framework, but probably you should have a look at the @Transient annotation.

Fields (and getters/setters if you are using JPA property access) marked with @Transient will be ignored by JPA, but usually be considered by other frameworks.

Upvotes: 2

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