[Hibernate-issues] [Hibernate-JIRA] Created: (HB-567) NullPointerException when using "select new" on constructor with native types

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  A new issue has been created in JIRA.

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  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-567


Here is an overview of the issue:
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        Key: HB-567
    Summary: NullPointerException when using "select new" on constructor with native types
       Type: Bug

     Status: Unassigned
   Priority: Minor

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.1.1

   Assignee: 
   Reporter: Shorn Tolley

    Created: Wed, 17 Dec 2003 7:38 PM
    Updated: Wed, 17 Dec 2003 7:38 PM
Environment: Win2k, JDK 1.4.2, HB 2.1.1

Description:
When my DTO object that I am "Select new"'ing into has a constructor that takes native types, I get the error attached.

If my DTO has a ctor which takes wrapper types, the code works.

If it has both, then Hibernate seems to prefer the native version, and I get the error.

I tried implementing the native-type ctor in two ways, using the "this" keyword to delegate to the wrapper-type ctor or with direct calls to the setter methods on the DTO.  Didn't seem to make any difference.


Exception:
    [junit] Testcase: testFindDocumentsByCaseDTOsWithEmptyCriteria(nrm.clas.persistence.document.test.DocumentPersistenceManagerTest):  Caused an ERROR
    [junit] Error finding documents by case
    [junit] nrm.clas.persistence.PersistenceLayerException: Error finding documents by case
    [junit]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    [junit]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    [junit]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    [junit]     at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
    [junit]     at nrm.clas.ExceptionUtil.instantiateException(ExceptionUtil.java:89)
    [junit]     at nrm.clas.ExceptionUtil.createNestedException(ExceptionUtil.java:127)
    [junit]     at nrm.clas.ExceptionUtil.createPersistenceLayerException(ExceptionUtil.java:312)
    [junit]     at nrm.clas.ExceptionUtil.createPersistenceLayerException(ExceptionUtil.java:291)
    [junit]     at nrm.clas.persistence.document.DocumentPersistenceManagerImpl.findDocumentsByCaseDTOs(DocumentPersistenceManagerImpl.java:162)
    [junit]     at nrm.clas.persistence.document.test.DocumentPersistenceManagerTest.testFindDocumentsByCaseDTOsWithEmptyCriteria(DocumentPersistenceManagerTest.java:45)
    [junit]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [junit]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [junit]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [junit]     at nrm.clas.test.ClasTestCase.run(ClasTestCase.java:508)
    [junit] Caused by: nrm.clas.common.persistence.PersistenceException: find
    [junit]     at nrm.clas.persistence.BasePersistenceManagerImpl.handleError(BasePersistenceManagerImpl.java:97)
    [junit]     at nrm.clas.persistence.BasePersistenceManagerImpl.handleError(BasePersistenceManagerImpl.java:116)
    [junit]     at nrm.clas.persistence.BasePersistenceManagerImpl.find(BasePersistenceManagerImpl.java:365)
    [junit]     at nrm.clas.persistence.document.DocumentPersistenceManagerImpl.findDocumentsByCaseDTOs(DocumentPersistenceManagerImpl.java:159)
    [junit]     ... 16 more
    [junit] Caused by: net.sf.hibernate.QueryException: could not instantiate: class nrm.clas.dto.document.CaseDocumentDTO
    [junit]     at net.sf.hibernate.hql.QueryTranslator.getResultColumnOrRow(QueryTranslator.java:993)
    [junit]     at net.sf.hibernate.loader.Loader.doQuery(Loader.java:221)
    [junit]     at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
    [junit]     at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
    [junit]     at net.sf.hibernate.loader.Loader.list(Loader.java:940)
    [junit]     at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
    [junit]     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
    [junit]     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1454)
    [junit]     at nrm.clas.persistence.BasePersistenceManagerImpl.find(BasePersistenceManagerImpl.java:359)
    [junit]     ... 17 more
    [junit] Caused by: java.lang.NullPointerException
    [junit]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    [junit]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    [junit]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    [junit]     at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
    [junit]     at net.sf.hibernate.hql.QueryTranslator.getResultColumnOrRow(QueryTranslator.java:990)
    [junit]     ... 25 more


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