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>This issue arose when testing BasicMap support in the Metamodel API for MapAttributeImpl when we found out that using the field.type (Class) was not working when an @ObjectTypeConverter has modified the type class to reflect the actual type on the database. At this point the typeName correctly reflects the object type (Long) and the type reflects the database type (String). >Model org.eclipse.persistence.testing.models.jpa.advanced.Buyer @BasicMap( fetch=EAGER, keyColumn=@Column(name="CARD"), keyConverter=@Convert("CreditCard"), valueColumn=@Column(name="NUMB"), valueConverter=@Convert("Long2String") ) @ObjectTypeConverter( name="CreditCard", conversionValues={ @ConversionValue(dataValue="VI", objectValue=VISA), @ConversionValue(dataValue="AM", objectValue=AMEX), @ConversionValue(dataValue="MC", objectValue=MASTERCARD), @ConversionValue(dataValue="DI", objectValue=DINERS) } ) @PrivateOwned // Default the collection table BUYER_CREDITCARDS public Map<String, Long> getCreditCards() { return creditCards; >Debugging >typeName is correct, type is not (but is the correct database type) mapping DirectMapMapping (id=143) attributeAccessor MethodAttributeAccessor (id=263) attributeName "creditCards" (id=266) cascadeMerge false cascadePersist false cascadeRefresh false cascadeRemove false changeOrderTargetQuery null changeSetDeleteQuery DataModifyQuery (id=267) containerPolicy DirectMapContainerPolicy (id=152) cloneMethod null constructor Constructor<T> (id=281) containerClass Class<T> (java.util.Hashtable) (id=284) containerClassName "java.util.Hashtable" (id=286) elementDescriptor RelationalDescriptor (id=122) valueField DatabaseField (id=274) columnDefinition "" (id=318) index 0 isInsertable true isNullable true isUnique false isUpdatable true length 255 name "NUMB" (id=323) precision 0 qualifiedName "Buyer_CREDITCARDS.NUMB" (id=322) scale 0 sqlType -2147483648 table DatabaseTable (id=320) type Class<T> (java.lang.String) (id=175) typeName "java.lang.Long" (id=324) useDelimiters false weight Integer (id=338) >this one is ok containerPolicy DirectMapContainerPolicy (id=149) cloneMethod null constructor Constructor<T> (id=174) containerClass Class<T> (org.eclipse.persistence.indirection.IndirectMap) (id=178) containerClassName "org.eclipse.persistence.indirection.IndirectMap" (id=179) elementDescriptor RelationalDescriptor (id=107) keyConverter null keyConverterClassName null keyField DatabaseField (id=180) valueConverter null valueField DatabaseField (id=157) columnDefinition "" (id=183) index 0 isInsertable true isNullable true isUnique false isUpdatable true length 255 name "AWARD_CODE" (id=184) precision 0 qualifiedName "NOVICE_CONSUMER_AWARDS.AWARD_CODE" (id=182) scale 0 sqlType -2147483648 table DatabaseTable (id=185) type Class<T> (java.lang.Integer) (id=110) typeName "java.lang.Integer" (id=187) useDelimiters false >Workaround: see design issue #83 and #81 - either use typeName and create a Class using ConversionManager, or add the attributeClassification fields to DirectCollectionMapping. http://wiki.eclipse.org/EclipseLink/Development/JPA_2.0/metamodel_api#DI_83:_20090914:_MapAttributeImpl.elementType_incorrectly_set_when_.40ObjectTypeConverter_is_present http://wiki.eclipse.org/EclipseLink/Development/JPA_2.0/metamodel_api#DI_81:_20090914:_Implement_.40BasicMap_DirectMapContainerPolicy_support_in_MapAttributeImpl >Note: the workaround for Metamodel processing is sufficient - this bug should be tracked and possibly fixed or enhanced - post release. >see bug# 266912
>code reference - typeName is stated as being a shadow variable - however typeName is set along with type only if typeName==null (typeName is a single-write field in effect) DatabaseField.java /** * Respective Java type desired for the field's value, used to optimize performance and for binding. * PERF: Allow direct variable access from getObject. */ public transient Class type; public String typeName; // shadow variable - string name of above Class type variable /** * Set the Java class type that corresponds to the field. * The JDBC type is determined from the class type, * this is used to optimize performance, and for binding. */ public void setType(Class type) { this.type = type; if (this.type != null && typeName == null) { typeName = this.type.getName(); } }
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