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[JPA] @MapKey or what?

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Cranegger

Post subject: [JPA] @MapKey or what?

Posted: Sun Feb 22, 2009 10:29 am

Newbie

Joined: Sun Feb 22, 2009 10:24 am
Posts: 3

I have the field in my class:

Code:

private Map<Test, Float> prices;

Test is my own Java class and Float is Java type of course.
What annotation should I use to map it?

I found @MapKey in Javadoc but I don't know how to use it. Could you help me?

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AparnaR

Post subject: Re: [JPA] @MapKey or what?

Posted: Mon Feb 23, 2009 2:02 am

Newbie

Joined: Mon Feb 02, 2009 4:55 am
Posts: 5

Cranegger wrote:

I have the field in my class:

Code:

private Map<Test, Float> prices;

Test is my own Java class and Float is Java type of course.
What annotation should I use to map it?

I found @MapKey in Javadoc but I don't know how to use it. Could you help me?

Try the code below

Code:

@CollectionOfElements(targetElement = Test.class)
@MapKeyManyToMany(targetEntity = Float.class)
private Map<Test,Float> prices= new HashMap<Test,Float>();

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Cranegger

Post subject:

Posted: Mon Feb 23, 2009 7:49 am

Newbie

Joined: Sun Feb 22, 2009 10:24 am
Posts: 3

Yesterday I have found the answer. It's similar to your code, but there is a little difference:

Code:

@CollectionOfElements(targetElement = Float.class)
@MapKeyManyToMany(targetEntity = Test.class)
private Map<Test, Float> prices;

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