RelationDefinitionVisitor.java example

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package org.opends.server.admin;



/**
 * A visitor of relation definitions, in the style of the visitor
 * design pattern. Classes implementing this interface can query
 * relation definitions in a type-safe manner when the kind of
 * relation definition is unknown at compile time. When a visitor is
 * passed to a relation definition's accept method, the corresponding
 * visit method most applicable to that relation definition is
 * invoked.
 *
 * @param <R>
 *          The return type of this visitor's methods. Use
 *          {@link java.lang.Void} for visitors that do not need to
 *          return results.
 * @param <P>
 *          The type of the additional parameter to this visitor's
 *          methods. Use {@link java.lang.Void} for visitors that do
 *          not need an additional parameter.
 */
public interface RelationDefinitionVisitor<R, P> {

  /**
   * Visit an instantiable relation definition.
   *
   * @param <C>
   *          The type of client managed object configuration that the
   *          relation definition refers to.
   * @param <S>
   *          The type of server managed object configuration that the
   *          relation definition refers to.
   * @param rd
   *          The instantiable relation definition to visit.
   * @param p
   *          A visitor specified parameter.
   * @return Returns a visitor specified result.
   */
  <C extends ConfigurationClient, S extends Configuration> R visitInstantiable(
      InstantiableRelationDefinition<C, S> rd, P p);



  /**
   * Visit a set relation definition.
   *
   * @param <C>
   *          The type of client managed object configuration that the
   *          relation definition refers to.
   * @param <S>
   *          The type of server managed object configuration that the
   *          relation definition refers to.
   * @param rd
   *          The set relation definition to visit.
   * @param p
   *          A visitor specified parameter.
   * @return Returns a visitor specified result.
   */
  <C extends ConfigurationClient, S extends Configuration> R visitSet(
      SetRelationDefinition<C, S> rd, P p);



  /**
   * Visit an optional relation definition.
   *
   * @param <C>
   *          The type of client managed object configuration that the
   *          relation definition refers to.
   * @param <S>
   *          The type of server managed object configuration that the
   *          relation definition refers to.
   * @param rd
   *          The optional relation definition to visit.
   * @param p
   *          A visitor specified parameter.
   * @return Returns a visitor specified result.
   */
  <C extends ConfigurationClient, S extends Configuration> R visitOptional(
      OptionalRelationDefinition<C, S> rd, P p);



  /**
   * Visit a singleton relation definition.
   *
   * @param <C>
   *          The type of client managed object configuration that the
   *          relation definition refers to.
   * @param <S>
   *          The type of server managed object configuration that the
   *          relation definition refers to.
   * @param rd
   *          The singleton relation definition to visit.
   * @param p
   *          A visitor specified parameter.
   * @return Returns a visitor specified result.
   */
  <C extends ConfigurationClient, S extends Configuration> R visitSingleton(
      SingletonRelationDefinition<C, S> rd, P p);

}