97 | Mapped (Inverse) LAZY @OneToMany vs. Unmapped LAZY @OneToMany to console a lazy @OneToMany mapped field after a finding entity manager closes. There is a switch DO_VIEW ... manager closes and as expected both a mapped @OneToMany list and an unmapped @OneToMany list are viewable: a.listA_mapped:[{A}[4]"ownedElement1", {A}[5]"ownedElement2"] a.listB_unmapped:[{B}[2]"b1", {B}[3 |
96 | Optimization of Map Querieshi! I am having loads and loads of occurrences of something like ((com.test.MyEntity) $1.map.get('com.test.MyEntity')).someProperty ... ((com.test.MyEntity) $1.map.get('com.test.MyEntity')).someOtherProperty .. ((com.test.MyEntity) $1.map.get('com.test.MyEntity')).someMoreProperties I need |
96 | Query over the keySet of a map field with collection parameterIt is possible to execute a query over a keySet of a map field with comparing to a collection ... " + "WHERE e.map member of ?1"; TypedQuery<EntityParent> q = em.createQuery(query ... ; } @OneToMany (cascade = CascadeType.ALL) public Map<String, EntityChild> map = new HashMap |
94 | Index on map keyIs there a way to create an Index with @Index on the key of a map? wua Andreas Wurm Indexes on map keys as well as queries on map keys are currently not supported. But as a workaround you can use ... = System.currentTimeMillis(); Query query = em.createQuery( "SELECT o FROM MyEntity o JOIN o.map e |
91 | Mapped By Fetch is very SlowWell ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah ... , go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. So my performance issue ... : The mapped by reference from MyEntity to MyEntityChild is eager. Therefore, retrieval of 10,000 MyEntity |
91 | Extended mapping-definitionsThe described feature is not available in any object-db I know, but possible with mapping ... its class) gets mapped to a java class. So cats get mapped to the java class 'Cat', dogs to 'Dog ... with MetaClass.className= "Dog" As consequence I would get a huge main-table with the default-mapping |
91 | Annotate a Map field with @ElementCollection or @BasicHello, we have an entity with a field whose type is a Map. Once we annotate the field with @ElementCollection, in the other case with @Basic. Is @Basic also a valid annotation for a Map field ... { @ElementCollection private Map<Integer, String> values = new HashMap<>(); @Basic private |
18 | Eager load MapI'm having an issue eager loading a nested map. I've attached @ManyToMany(fetch=FetchType.EAGER) attributes to no avail. If the map is viewed in the debugger or force iterated in the code it loads ok ... it to a db and re-loads it. The EntityManager is closed before accesing any fields. Finally the nested map |
18 | Eager Fetch of Map with Entities as KeysLoading eagerly a map that uses entity objects as keys is currently unsupported, if the equals ... is unavailable during instantiation of the map. The following test case demonstrates the problem ... (); MyKeyEntity key = new MyKeyEntity("key"); em.persist(key); entity.map |
1 | [ODB1] Chapter 4 - JDO Metadata explained in section 4.5. 4.4 Arrays, Collections and Maps Special XML sub elements are available for array, collection and map fields: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE jdo SYSTEM "http ... > <field name="f2" embedded="true"> <map embedded-key="true" embedded-value="true |
