What are alternatives to runtime retention policies and how do they compare?

class AnnotationExample {
    // Compile-time retention using an annotation
    @Retention(RetentionPolicy.COMPILATION_TIME)
    public @interface CompileTimeRetention {}

    // Source retention using an annotation
    @Retention(RetentionPolicy.SOURCE)
    public @interface SourceRetention {}

    // Usage of alternative annotations
    @CompileTimeRetention
    public void exampleMethod() {
        // Method logic here
    }

    @SourceRetention
    public void anotherExampleMethod() {
        // This method will not retain the annotation in the bytecode
    }
}