/*

  * Copyright 2007 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kim.service;

 import java.util.List;

 import java.util.Map;

 import org.kuali.rice.kim.bo.Person;

 import org.kuali.rice.krad.bo.BusinessObject;

 /**

  * 

  * This service acts as a facade on the entity information that is provided

  * through the IdentityService and provides a "person-centric" view of that 

  * entity data.

  * 

  * <p>In general, the Person object flattens out the various related pieces of

  * entity data into a denormalized view on that data.  In many cases, that

  * data will have a defined "default" value in the entity data model.  This

  * default data is what the Person object will be constructed with.  For

  * example, an entity can have more than one name, but one of those names

  * is flagged as the default.

  * 

  * <p>This service will do it's best to construct valid Person objects even

  * for entities that don't have an entity type of "PERSON".  In those cases

  * not all of the attributes on the Person object will be populated.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public interface PersonService {

         /**

          * Retrieve a single Person object by Principal ID.

          */

         Person getPerson( String principalId );

         /**

          * Retrieve a person by an arbitrary external identifier.  This method could

          * potentially return multiple results as there is no guarantee of uniqueness

          * for external identifiers.

          * 

          * @param externalIdentifierTypeCode Type of external identifier to search for.

          * @param externalId The external identifier.

          * @return List of Person objects.

          */

         List<Person> getPersonByExternalIdentifier( String externalIdentifierTypeCode, String externalId );

         /**

          * Gets a single Person by their principal name (user ID).

          */

         Person getPersonByPrincipalName( String principalName );

         /**

          * Gets a single Person by their employee id.

          */

         Person getPersonByEmployeeId( String employeeId ); 

         /**

          * Perform an unbounded search for person records.

          */

         List<Person> findPeople( Map<String, String> criteria );

         /**

          * Perform a Person lookup.  If bounded, it will follow the configured KNS lookup limit.

          */

         List<Person> findPeople( Map<String, String> criteria, boolean unbounded );

         /**

          * Get the class object which points to the class used by the underlying implementation.

          * 

          * This can be used by implementors who may need to construct Person objects without wishing to bind their code

          * to a specific implementation.

          */

         Class<? extends Person> getPersonImplementationClass();

         /**

      * This method takes a map on its way to populate a business object and replaces all 

      * user identifiers with their corresponding universal users

          */

         Map<String, String> resolvePrincipalNamesToPrincipalIds( BusinessObject businessObject, Map<String, String> fieldValues );

     /**

      * Compares the Principal ID passed in with that in the Person object.  If they are the same, it returns the

      * original object.  Otherwise, it pulls the Person from KIM based on the sourcePrincipalId.

      */

         Person updatePersonIfNecessary(String sourcePrincipalId, Person currentPerson );

         /**

          * Checks whether the given set of search criteria contain any non-blank properties which need to be applied against

          * a related Person object.  This would be used by the lookup service to determine if special steps need

          * to be taken when performing a search.

          */

         boolean hasPersonProperty(Class<? extends BusinessObject> businessObjectClass, Map<String,String> fieldValues);

         /**

      * Flush all of the role-related caches.

      */

     void flushPersonCaches();

 }