er.extensions.eof

Class ERXUnmodeledToManyRelationship<S extends ERXEnterpriseObject,D extends ERXEnterpriseObject>

java.lang.Object

er.extensions.eof.ERXUnmodeledToManyRelationship<S,D>

public class ERXUnmodeledToManyRelationship<S extends ERXEnterpriseObject,D extends ERXEnterpriseObject>
extends Object

A class than is composited into an EO to provide common toMany functionality for the case where the toMany cannot be modeled in EOF due to the unusually large size possibilities of the toMany relationship.

This class is for simple to many relationships, has not been tested on flattened toMany relationships having a join table, aka "many-to-many" relationships.

Usage: Lazily create a private instance of this inside an EO passing in the appropriate constructor parameters and then implement cover methods similar to those that would have been available thru the normal Entity templates calling the corresponding methods of this class.

For example, you might do this in an entity named CTMediaTemplate that formerly had a 'messages' relationship to CTMessage but due to the huge size of the toMany impacting performance, the toMany side of the relationship had to be deleted from the EOModel:

        private ERXUnmodeledToManyRelationship<CTMediaTemplate, CTMessage> _messagesRelationship;

        // Lazily initialize the helper class
        public ERXUnmodeledToManyRelationship<CTMediaTemplate, CTMessage> messagesRelationship() {
                if (_messagesRelationship == null) {
                        _messagesRelationship = new ERXUnmodeledToManyRelationship<CTMediaTemplate, CTMessage>(this,
                                                        CTMessage.ENTITY_NAME, CTMessage.XKEY_MEDIA_TEMPLATE);
                }
                return _messagesRelationship;
        }
        
        public Integer countMessages() {
                return messagesRelationship().countObjects();
        }

        public EOQualifier qualifierForMessages() {
                return messagesRelationship().qualifierForObjects();
        }

        public NSArray<CTMessage> messages() {
                return messagesRelationship().objects();
        }

        public ERXFetchSpecification<CTMessage> fetchSpecificationForMessages() {
                return messagesRelationship().fetchSpecificationForObjects();
        }

        public NSArray<CTMessage> messages(EOQualifier qualifier) {
                return messagesRelationship().objects(qualifier);
        }

        public NSArray<CTMessage> messages(EOQualifier qualifier, boolean fetch) {
                return messagesRelationship().objects(qualifier, null, fetch);
        }

        public NSArray<CTMessage> messages(EOQualifier qualifier, NSArray<EOSortOrdering> sortOrderings, boolean fetch) {
                return messagesRelationship().objects(qualifier, sortOrderings, fetch);
        }

        public void addToMessagesRelationship(CTMessage object) {
                messagesRelationship().addToObjectsRelationship(object);
        }

        public void removeFromMessagesRelationship(CTMessage object) {
                messagesRelationship().removeFromObjectsRelationship(object);
        }

        public void deleteMessagesRelationship(CTMessage object) {
                messagesRelationship().deleteObjectRelationship(object);
        }

        public void deleteAllMessagesRelationships() {
                messagesRelationship().deleteAllObjectsRelationships();
        }
        

Author:

kieran

Constructor Summary

Constructors

Constructor and Description
ERXUnmodeledToManyRelationship(S sourceObject, String destinationEntityName, ERXKey<S> reverseRelationshipKey) Standard constructor where the destination entity is a single type.
ERXUnmodeledToManyRelationship(S sourceObject, String destinationEntityName, ERXKey<S> reverseRelationshipKey, boolean isDeep) A constructor that allows isDeep to be set to true to handle destination entity that is the super class of an inheritance hierarchy.

Method Summary

Modifier and Type	Method and Description
void	addToObjectsRelationship(D object)
void	addToObjectsRelationship(NSArray<D> objects)
Integer	countObjects()
void	deleteAllObjectsRelationships()
void	deleteObjectRelationship(D object)
ERXFetchSpecification<D>	fetchSpecificationForObjects()
NSArray<D>	objects()
NSArray<D>	objects(com.webobjects.eocontrol.EOQualifier qualifier)
NSArray<D>	objects(com.webobjects.eocontrol.EOQualifier qualifier, boolean fetch)
NSArray<D>	objects(com.webobjects.eocontrol.EOQualifier qualifier, NSArray<com.webobjects.eocontrol.EOSortOrdering> sortOrderings, boolean fetch)
com.webobjects.eocontrol.EOQualifier	qualifierForObjects()
void	removeAllFromObjectsRelationship()
void	removeFromObjectsRelationship(D object)
void	removeFromObjectsRelationship(NSArray<D> objects)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ERXUnmodeledToManyRelationship

public ERXUnmodeledToManyRelationship(S sourceObject,
                                      String destinationEntityName,
                                      ERXKey<S> reverseRelationshipKey)

Standard constructor where the destination entity is a single type. Excludes entities that might inherit from the destination entity

Parameters:

sourceObject -

destinationEntityName -

reverseRelationshipKey -

ERXUnmodeledToManyRelationship

public ERXUnmodeledToManyRelationship(S sourceObject,
                                      String destinationEntityName,
                                      ERXKey<S> reverseRelationshipKey,
                                      boolean isDeep)

A constructor that allows isDeep to be set to true to handle destination entity that is the super class of an inheritance hierarchy. The inherited entities are included in the methods that return arrays of destination EOEnterpriseObjects.

Parameters:

sourceObject -

destinationEntityName -

reverseRelationshipKey -

isDeep -

Method Detail

countObjects

public Integer countObjects()

Returns:

the total count of objects in the relationship

qualifierForObjects

public com.webobjects.eocontrol.EOQualifier qualifierForObjects()

Returns:

the EOQualifier that qualifies the toMany destination objects

objects

public NSArray<D> objects()

Returns:

the related destination objects

fetchSpecificationForObjects

public ERXFetchSpecification<D> fetchSpecificationForObjects()

Returns:

the ERXFetchSpecification that fetches the destination toMany objects that have been persisted to the database

objects

public NSArray<D> objects(com.webobjects.eocontrol.EOQualifier qualifier)

objects

public NSArray<D> objects(com.webobjects.eocontrol.EOQualifier qualifier,
                          boolean fetch)

objects

public NSArray<D> objects(com.webobjects.eocontrol.EOQualifier qualifier,
                          NSArray<com.webobjects.eocontrol.EOSortOrdering> sortOrderings,
                          boolean fetch)

addToObjectsRelationship

public void addToObjectsRelationship(D object)

addToObjectsRelationship

public void addToObjectsRelationship(NSArray<D> objects)

removeFromObjectsRelationship

public void removeFromObjectsRelationship(D object)

removeFromObjectsRelationship

public void removeFromObjectsRelationship(NSArray<D> objects)

removeAllFromObjectsRelationship

public void removeAllFromObjectsRelationship()

deleteObjectRelationship

public void deleteObjectRelationship(D object)

deleteAllObjectsRelationships

public void deleteAllObjectsRelationships()