| [[index]] |
| image:images/JDOx150.png[float="left"] |
| image:images/jdo_text.png[float="left"] |
| |
| ''''' |
| |
| :_basedir: |
| :_imagesdir: images/ |
| :notoc: |
| :titlepage: |
| :grid: cols |
| |
| == Which ORM specification ?anchor:Which_ORM_specification_[] |
| |
| There are 2 prevalent specification in the Java ORM world. JDO provides |
| the most complete definition, whilst JPA is the most recent. |
| |
| === Relationshipsanchor:Relationships[] |
| |
| In this guide we show the different types of ORM relation commonly used, |
| and mark against it which specification supports it. This list is not |
| yet complete but will be added to to provide a comprehensive list of |
| relationship type and where you can find it. |
| |
| [cols=",,,",options="header",] |
| |=== |
| |Field Type |Relation |JDO |JPA |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_one.html#uni[1-1 |
| Unidirectional] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_one.html#bi[1-1 |
| Bidirectional] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#PC[1-1 |
| serialised] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/compound_identity.html#1_1_uni[1-1 |
| CompoundIdentity Unidirectional] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/compound_identity.html#1_N_coll_bi[1-N |
| CompoundIdentity Collection Bidirectional] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |PC |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/compound_identity.html#1_N_map_bi[1-N |
| CompoundIdentity Map Bidirectional] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Interface |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/interfaces.html[1-1 |
| Unidirectional] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Interface |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/interfaces.html[1-1 |
| Bidirectional] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Interface |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#Reference[1-1 |
| serialised] |image:images/icon_success_sml.png[image] |? |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#fk_uni[1-N |
| ForeignKey Unidirectional Collection] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#fk_bi[1-N |
| ForeignKey Bidirectional Collection] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#join_uni[1-N |
| JoinTable Unidirectional Collection] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#join_bi[1-N |
| JoinTable Bidirectional Collection] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<Non-PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#join_nonpc[1-N |
| JoinTable Collection] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#shared_join[1-N |
| JoinTable Collection using shared JoinTable] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_collection.html#shared_fk[1-N |
| ForeignKey Collection using shared ForeignKey] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/many_to_many.html[M-N |
| JoinTable] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/compound_identity.html#1_N_uni[1-N |
| CompoundIdentity Unidirectional] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#Collection[1-N |
| serialised Collection] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Collection<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#CollectionElements[1-N |
| JoinTable Collection of serialised elements] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_list.html#fk_uni[1-N |
| ForeignKey Unidirectional Indexed List] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_list.html#fk_bi[1-N |
| ForeignKey Bidirectional Indexed List] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_list.html#join_uni[1-N |
| JoinTable Unidirectional Indexed List] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_list.html#join_bi[1-N |
| JoinTable Bidirectional Indexed List] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<Non-PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_list.html#join_nonpc[1-N |
| JoinTable Indexed List] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jpa/orm/one_to_many_list.html#fk_uni[1-N |
| ForeignKey Unidirectional Ordered List] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jpa/orm/one_to_many_list.html#fk_bi[1-N |
| ForeignKey Bidirectional Ordered List] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jpa/orm/one_to_many_list.html#join_uni[1-N |
| JoinTable Unidirectional Ordered List] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |List<PC> |
| |http://www.datanucleus.org/products/accessplatform/jpa/orm/one_to_many_list.html#join_bi[1-N |
| JoinTable Bidirectional Ordered List] |
| |image:images/icon_error_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Map<PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#join_pc_pc[1-N |
| JoinTable Map] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Map<Non-PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#join_simple_pc[1-N |
| JoinTable Map] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Map<PC, Non-PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#join_pc_simple[1-N |
| JoinTable Map] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Map<Non-PC, Non-PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#join_simple_simple[1-N |
| JoinTable Map] |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Map<Non-PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#fk_uni_key[1-N |
| ForeignKey Map Unidirectional (key stored in value)] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Map<Non-PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#fk_bi_key[1-N |
| ForeignKey Map Bidirectional (key stored in value)] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Map<PC, Non-PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/one_to_many_map.html#fk_uni_value[1-N |
| ForeignKey Map Unidirectional (value stored in key)] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |Map<PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#Map[1-N |
| serialised Map] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Map<PC, PC> |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#MapKeysValues[1-N |
| JoinTable Map of serialised keys/values] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |PC[ ] |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/arrays.html#fk[1-N |
| ForeignKey Unidirectional Array] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |PC[ ] |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/arrays.html#join[1-N |
| JoinTable Unidirectional Array] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |
| |PC[ ] |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/serialised.html#Array[1-N |
| serialised Array] |image:images/icon_success_sml.png[image] |
| |image:images/icon_success_sml.png[image] |
| |
| |Non-PC[ ] |
| |http://www.datanucleus.org/products/accessplatform/jdo/orm/arrays.html#join[1-N |
| JoinTable Unidirectional Array] |
| |image:images/icon_success_sml.png[image] |
| |image:images/icon_error_sml.png[image] |
| |=== |
| |
| ''''' |
| |