Commons Annotation Proxies - rhjoerg/rhjoerg-java GitHub Wiki

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Properties

The created proxy:

• returns the default values of the given annotation class, if not overwritten by the provided map.
• returns correct equality, if compared to a "real" instance.
• returns the same hashCode as a "real" annotation instance.
• is not serializable (yet)

Usage

Given the following annotation:

@Documented
@Retention(RUNTIME)
public static @interface TestAnnotation
{
    String foo();
    String bar() default "bar";
    String[] foobar() default { "foo", "bar" };
}

... add the following snippet to instantiate it:

import static ch.rhjoerg.commons.annotation.Annotations.annotationProxy;
...
TestAnnotation annotation = annotationProxy(TestAnnotation.class, Map.of("foo", "foo"));

The given map must include at least those values without a default value. It may of course overwrite one or more of these values:

annotationProxy(TestAnnotation.class, Map.of("foo", "foo", "bar", "baz"));