java - NullPointerException org.hibernate.cfg.OneToOneSecondPass.doSecondPass -

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i using hibernate 3.0

i have following tables , corresponding entries,

table a: integer aid; integer bid;  table b: integer bid;  @entity @table(name="a") public class {  @id @generatedvalue(strategy=generationtype.auto) @column(name="aid") integer aid; @onetoone(targetentity=b.class) @joincolumn(name="bid", referencedcolumnname="bid") b b; }   @entity @table(name="b") public class b {  @id @generatedvalue(strategy=generationtype.auto) @column(name="bid") integer bid;  @onetoone(targetentity=a.class, mappedby="b") @joincolumn(referencedcolumnname="bid") a; }

when try run spring application above configuration, following error,

caused by: java.lang.nullpointerexception     @ org.hibernate.cfg.onetoonesecondpass.dosecondpass(onetoonesecondpass.java:135)     @ org.hibernate.cfg.configuration.secondpasscompile(configuration.java:1163)     @ org.hibernate.cfg.annotationconfiguration.secondpasscompile(annotationconfiguration.java:316)     @ org.hibernate.cfg.configuration.buildmappings(configuration.java:1148)     @ org.springframework.orm.hibernate3.localsessionfactorybean.buildsessionfactory(localsessionfactorybean.java:720)     @ org.springframework.orm.hibernate3.abstractsessionfactorybean.afterpropertiesset(abstractsessionfactorybean.java:188)     @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.invokeinitmethods(abstractautowirecapablebeanfactory.java:1545)     @ org.springframework.beans.factory.support.abstractautowirecapablebeanfactory.initializebean(abstractautowirecapablebeanfactory.java:1483)

 

i need reference of in b, though b not having reference a.

the exception getting beacuse trying define mapping on both sides. if want reference of in b, should do

@entity @table(name="a") public class {  @id @generatedvalue(strategy=generationtype.auto) @column(name="aid") integer aid;  @onetoone(targetentity=b.class) b b; }   @entity @table(name="b") public class b {  @id @generatedvalue(strategy=generationtype.auto) @column(name="bid") integer bid;  @onetoone(targetentity=a.class, mappedby="b") a; }

watch out bugs in older hibernate versions

https://hibernate.atlassian.net/browse/ann-554


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