Java Annotation mulitple value , no array

Question

i've got a a question i hope you can help me. I want to create a Annotation for my little little database framework but how can i create this with a annotation?

@Columns({name="id", type="long"},{name="username",type="string"})

Simple annotation ca have a String[] butt i want a key/value in this array.

Thanks for you help.

sunysen · Accepted Answer · 2015-11-13 06:56:20Z

2

more annotations of same type aren't allowed，you can change a total realization of ideas

public @interface Column {
      String name();
      String type();
}
public @interface Columns {
    Column[] value();
}

@Columns({@Column(name="id", type="long"), @Column(name="username",type="string")})
public void test() {}

answered Nov 13, 2015 at 6:56

sunysen

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1 Comment

user1740789 Over a year ago

Yes thats fine. Thanks.

Audrius Meškauskas · Accepted Answer · 2015-11-13 07:00:09Z

0

Create the annotation class that itself holds a key-value pair. Then, use it as parameter to another annotation that accepts array. Would be something like

 @Columns(columns =
   @Column{name = "name", type = "type"},
   @Column{name = "name", type = "type"}, 
   @Column{name = "name", type = "type"}
 )

See Hibernate @SecondaryTable for inspiration.

answered Nov 13, 2015 at 7:00

Audrius Meškauskas

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