/*

  * Copyright 2006-2007 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.kns.service;

 import java.util.List;

 import java.util.Map;

 import org.kuali.rice.kns.bo.BusinessObjectRelationship;

 import org.kuali.rice.kns.bo.PersistableBusinessObject;

 import org.kuali.rice.kns.bo.PersistableBusinessObjectExtension;

 import org.kuali.rice.kns.exception.ClassNotPersistableException;

 import org.kuali.rice.kns.util.ForeignKeyFieldsPopulationState;

 /**

  * This interface defines methods that a Persistence Service must provide. PersistenceMetadataService provides access to

  * persistence-layer information about persistable classes.

  */

 public interface PersistenceStructureService {

     /**

      * @param clazz

      * @return true if the given Class is persistable (is known to OJB)

      */

     public boolean isPersistable(Class clazz);

     /**

      * @param clazz Class whose primary key field names you want to list

      * @return a List of field names for the given class which are designated as key fields in the OJB repository file

      * @throws IllegalArgumentException if the given Class is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      */

     public List listPrimaryKeyFieldNames(Class clazz);

     /**

      * @param clazz Class whose field names you want to list

      * @return a List of field names for the given class in the OJB repository file

      * @throws IllegalArgumentException if the given Class is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      */

     public List listFieldNames(Class clazz);

     /**

      * @param clazz whose primary key field name, anonymous key marking is requested for

      * @return a Map containing the primary key name as the key and Boolean indicating whether or not the pk is marked as anonymous

      *         in the obj repository file

      * @throws IllegalArgumentException if the given Object is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      */

     /* No references - https://test.kuali.org/confluence/x/SYCf

     public Map getPrimaryKeyFieldAnonymousMarking(Class clazz);

         */

     /**

      * 

      * This method returns a List of Strings, each containing the field name of one of the primary keys, as defined in the ORM

      * layer.

      * 

      * @param clazz - Class whose primary key field names are requested

      * @return A List of Strings, each containing the field name of the primary key

      * @throws IllegalArgumentException if the given Object is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      * 

      */

     public List getPrimaryKeys(Class clazz);

     /**

      * @param persistableObject

      * @return true if all primary key fields of the string have a non-null (and non-empty, for Strings) value

      * @throws IllegalArgumentException if the given Object is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      */

     public boolean hasPrimaryKeyFieldValues(Object persistableObject);

     /**

      * @param persistableObject object whose primary key fields need to be cleared

      * @return the object whose primary key fields have just been cleared

      * @throws IllegalArgumentException if the given Object is null

      * @throws ClassNotPersistableException if the given object is of a type not described in the OJB repository

      */

     public Object clearPrimaryKeyFields(Object persistableObject);

     /**

      * @param superclazz class whose persistable subclasses (or interface whose implementors) will be returned

      * @return a List of persistable Classes which extend or implement the given Class

      * @throws IllegalArgumentException if the given class is null

      */

     public List listPersistableSubclasses(Class superclazz);

     /**

      * @param persistableClass

      * @param attributeName Name of an attribute used in the relationship

      * @return BusinessObjectRelationship object containing information about the object type related via the named relationship of the

      *         given class, or null if the persistence service can find no object type related via the named relationship

      * @throws IllegalArgumentException if the given Class is null

      * @throws IllegalArgumentException if the given relationshipName is blanks

      * @throws ClassNotPersistableException if the given Class is a type not described in the OJB repository

      */

     public Map<String,BusinessObjectRelationship> getRelationshipMetadata(Class persistableClass, String attributeName, String attributePrefix );

     public Map<String,BusinessObjectRelationship> getRelationshipMetadata(Class persistableClass, String attributeName);

     public String getForeignKeyFieldName(Class persistableObjectClass, String attributeName, String pkName);

     /**

      * Attempts to match the attribute name given for the class as a fk field to a reference class defined in the repository. Since

      * a fk field can have references to many tables, this returns a list of all found.

      * 

      * @param persistableObjectClass

      * @param attributeName

      * @return Map with attribue name as key of map and class as value

      */

     public Map<String,Class> getReferencesForForeignKey(Class persistableObjectClass, String attributeName);

     /**

      * 

      * This method will return a Map of all the foreign key fields and the corresponding primary key fields for a given reference.

      * 

      * The Map structure is: Key(String fkFieldName) => Value(String pkFieldName)

      * 

      * @param clazz - Class that contains the named reference

      * @param attributeName - Name of the member that is the reference you want foreign keys for

      * @return returns a Map populated as described above, with one entry per foreign key field

      * 

      */

     public Map getForeignKeysForReference(Class clazz, String attributeName);

     /**

      * 

      * This method is a PersistableBusinessObject specifific utility method. If the Class clazz passed in is a descendent of PersistableBusinessObject,

      * and if the attributeName specified exists on the object, then the class of this

      * attribute named will be returned.

      * 

      * @param clazz - class to be examined for the attribute's class

      * @param attributeName - name of the class' attribute to be examined

      * @return the class of the named attribute, if no exceptions occur

      */

     public Class<? extends PersistableBusinessObjectExtension> getBusinessObjectAttributeClass(Class<? extends PersistableBusinessObject> clazz, String attributeName);

     /**

      * Builds a map of reference pk attributes back to the foreign key.

      * 

      * @param persistableObjectClass

      * @return

      */

     public Map getNestedForeignKeyMap(Class persistableObjectClass);

     /**

      * 

      * This method checks the foreign keys for a reference on a given BO, and tests that all fk fields are populated if any are

      * populated.

      * 

      * In other words, for a given reference, it finds all the attributes of the BO that make up the foreign keys, and checks to see

      * if they all have values. It also keeps a list of all the fieldNames that do not have values.

      * 

      * @param bo - A populated BusinessObject descendent. Must contain an attributed named referenceName.

      * @param referenceName - The name of the field that is a reference we are analyzing.

      * @return A populated ForeignKeyFieldsPopulation object which represents the state of population for the foreign key fields.

      */

     public ForeignKeyFieldsPopulationState getForeignKeyFieldsPopulationState(PersistableBusinessObject bo, String referenceName);

     /**

      * 

      * This method uses the persistence layer to determine the list of reference objects contained within this parent object. For

      * example, an Account object contains sub-objects such as Chart, as well as the key that connects the two, String

      * chartOfAccountsCode.

      * 

      * The return structure is: Map<referenceName, referenceClass>.

      * 

      * As an example, an Account object passed into this would return:

      * 

      * 0:['chartOfAccounts', org.kuali.module.chart.bo.Chart] 1:['organization', org.kuali.module.chart.bo.Org] etc.

      * 

      * @param boClass Class that would like to be analyzed for reference names

      * @return Map containing the reference name for the key as a string, and the class of the reference as the value. If the object

      *         contains no references, then this Map will be empty.

      * 

      */

     public Map<String, Class> listReferenceObjectFields(Class boClass);

     /**

      * 

      * This method uses the persistence layer to determine the list of reference objects contained within this parent object. For

      * example, an Account object contains sub-objects such as Chart, as well as the key that connects the two, String

      * chartOfAccountsCode.

      * 

      * The return structure is: Map<referenceName, referenceClass>.

      * 

      * As an example, an Account object passed into this would return:

      * 

      * 0:['chartOfAccounts', org.kuali.module.chart.bo.Chart] 1:['organization', org.kuali.module.chart.bo.Org] etc.

      * 

      * @param bo BusinessObject (or subclass) instance that would like to be analyzed for reference names

      * @return Map containing the reference name for the key as a string, and the class of the reference as the value. If the object

      *         contains no references, then this Map will be empty.

      * 

      */

     public Map<String, Class> listReferenceObjectFields(PersistableBusinessObject bo);

     public Map<String, Class> listCollectionObjectTypes(Class boClass);

     public Map<String, Class> listCollectionObjectTypes(PersistableBusinessObject bo);

     /**

      * Returns whether there is a reference defined in the persistence layer with the given name.

      * Depending on the type of underlying persistence mechanism, this method may or may not return true

      * when the referenceName really refers to a collection type.

      * 

      * To determine whether a reference is a collection, use the hasCollection method instead.

      * 

      * In OJB, this method will return false for collection references.

      * 

      * @param boClass

      * @param referenceName

      * @return

      */

     public boolean hasReference(Class boClass, String referenceName);

     /**

      * Returns whether BOs of the given class have a collection defined within them with the given collection name.

      * 

      * @param boClass

      * @param collectionName

      * @return

      */

     public boolean hasCollection(Class boClass, String collectionName);

     public boolean isReferenceUpdatable(Class boClass, String referenceName);

     public boolean isCollectionUpdatable(Class boClass, String collectionName);

     /**

      * Returns a listing of the FK field mappings between a BO and the elements in a collection. Since this is in effect a 

      * 1:n relationship, only the complete primary key set of the parent BO will be returned.

      * 

      * for example, assume Account BO has an "acctNbrForAcct" PK, and it has a list of subAccounts, 

      * each of which has a ("acctNbrForSubAcct", "subAcctNbr") PK pair.

      * 

      * the Account PK will be mapped to some of the PK fields of the element list.  

      * When called on the Account BO class with the "subAccounts" collection name, his method should return

      * a map with a mapping of "acctNbrForAcct" (key) => "acctNbrForSubAcct"

      * 

      * @param boClass

      * @param collectionName

      * @return

      */

     public Map<String, String> getInverseForeignKeysForCollection(Class boClass, String collectionName);

     /**

      * Returns the name of the table underlying the business object class

      * 

      * @param boClass

      * @return

      */

     public String getTableName(Class<? extends PersistableBusinessObject> boClass);

 }