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Re: [aspectj-users] Marker Annotations 
Thanks.  It seemed like a square peg, round hole thing.


Adrian Colyer wrote:
Generation of a method like this is not something that AspectJ can easily help you with. You could write a generic equals method that uses reflection to find out which fields have the annotation and compare them (and then maybe use itds to declare that equals implementation on behalf of the target types). Avoiding reflection though, I think the best solution to this is probably to use something like APT: http://java.sun.com/j2se/1.5.0/docs/guide/apt/ 

-- Adrian
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17/05/2005 20:26
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[aspectj-users] Marker Annotations






I've been using AspectJ a bit and I've got a question that is way outside
of my experience and was wondering if someone could help.

I would like to use a Market Annotation on fields in a class to generate
an equals method. Something like:

public class Rubble {
  @Equal
  private Long fred;

  @Equal
  private String wilma;
}

would build a new:

  public boolean equals(Object value) {
      Rubble rubbleValue = (Rubble)value;
      return (fred.equals(rubbleValue.fred &&
                     wilma.equals(rubbleValue.wilma));
}

Obviously the example equals method logic isn't complete.  I would
probably use EqualsBuilder or something to make it easier.

TIA

Neil Hart

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