[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3854) Issue with greedy loading of associations (default-lazy=false )
Issue with greedy loading of associations (default-lazy=false )
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Key: HHH-3854
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3854
Project: Hibernate Core
Issue Type: Bug
Components: envers
Environment: Hibernate - core 3.4.0-SNAPSHOT, Hibernate-envers (from trunk)
Reporter: Amar Singh
Attachments: greedy-loading.zip
I have an Entity GP which has a many to one association to entity CA.
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD
3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping
package="org.hibernate.envers.test.integration.onetoone.bidirectional"
default-lazy="false">
<class name="BidirectionalRefIngPK"
table="BIDIRECTIONAL_REFERENCING_ENTITY">
<id name="id" type="long"
column="BIDIRECTIONAL_REFERENCING_ID" >
<generator class="native"/>
</id>
<property name="data"/>
<many-to-one name="reference" cascade="save-update"
class="BidirectionalRefEdPK"
column="BIDIRECTIONAL_REFERENCED_ID"/>
</class>
<class name="BidirectionalRefEdPK"
table="BIDIRECTIONAL_REFERENCED_ENTITY">
<id name="longId" type="long"
column="BIDIRECTIONAL_REFERENCED_ID">
<generator class="native"/>
</id>
<property name="data"/>
</class>
</hibernate-mapping>
With this when I load a previous version of BidirectionalRefIngPK, the loading mechanism
tries to create a proxy for BidirectionalRefEdPK, but in my case lazy is false so an
internal call to createProxy will return NULL hence .
This happens in ToOneIdMapper.java in method mapToEntityFromMap around line 82, which then
internally calls for AbstractEntityTuplizer.java line 395 for getProxyFactory() ending in
NULL pointer exception because proxy factory is null as mine is a greedy loading.
TO REPRODUCE
~~~~~~~~~~~~~
Please find a zipped folder attached. The zipped file has 4 files:
- GreedyLoading.java (actual testng test case)
- BidirectionalRefEdPK.java (Entity 1)
- BidirectionalRefIngPK.java (Entity 2)
- greedyloading.hbm.xml
Please place the three java files in its package
(org.hibernate.envers.test.integration.onetoone.bidirectional), couldn't find the
right package so created test case accordingly. Put the greedyloading.hbm.xml in
src/test/resources.
Now when testng runs GreedyLoading.java you should see NPE.
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