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package net.sourceforge.cruisecontrol.gendoc.annotations;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* <p>Specifies the required cardinality of an attribute or child of a plugin. Also allows an
* optional, supplemental description to be supplied; this description can be used to
* qualify or justify the specified cardinality. Note that if no cardinality is specified
* (either using this annotation or {@link Required} or {@link Optional}), the cardinality is
* assumed to be 0..* for children and 0..1 for attributes.</p>
*
* <p>Applies to: Attribute setter or child add/create method.</p>
*
* @author Seth Pollen (pollens@msoe.edu)
* @see Required
* @see Optional
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Cardinality {
/** @return Minimum allowed occurrences of this attribute or child. Must be nonnegative. */
int min();
/**
* @return Maximum allowed occurrences of this attribute or child. -1 indicates no maximum. Otherwise, this
* value must be greater than or equal to the min.
*/
int max();
/** @return An optional, supplemental note explaining this cardinality. */
String note() default "";
}