package org.trails.descriptor.annotation;

 import java.lang.annotation.ElementType;

 import java.lang.annotation.Retention;

 import java.lang.annotation.RetentionPolicy;

 import java.lang.annotation.Target;

 /**

  * Annotation used to declare filter options from a select based on

  * other property.

  * <p/>

  * The most common example of this is selecting a State based on the value of

  * the country property. If the property you want to filter by is named

  * "countryFilter" and the Country class has a property named "states" you

  * should annotate the state property in this way:<br>

  *

  * @author pruggia

  * @PossibleValues("countryFilter.states")<br> <br>

  * Don't forget to add a {@link InitialValue} to the filtering

  * property.

  */

 @Retention(RetentionPolicy.RUNTIME)

 @Target({ElementType.FIELD, ElementType.METHOD})

 @DescriptorAnnotation(PossibleValuesAnnotationHandler.class)

 public @interface PossibleValues

 {

         /**

          * The expression that when executed provides the options to select values

          * from.

          */

         String value();

 }