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Re: Using composition instead of inheritance
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Re: Using composition instead of inheritance

  • Subject: Re: Using composition instead of inheritance
  • From: Mike Schrag <email@hidden>
  • Date: Sat, 02 Jun 2012 19:29:02 -0400
Not sure ... you might want to change the class name on your framework entity, and copy the attributes and relationships from the app entity into the framework entity (rather than delete entities). you'll have to debug what is busted .. just printing out all your entites, relationships, and their destination entities ... something will be null. you'll have to look into EODatabase to see what exactly is NPEing.

On Jun 2, 2012, at 7:01 PM, Paul Hoadley <email@hidden> wrote:

On 02/06/2012, at 11:11 PM, Mike Schrag wrote:

You'll have to dig into what that NPE is exactly. Hard to diagnose without that.

Here's the full stack trace.

java.lang.NullPointerException
at com.webobjects.eoaccess.EODatabase.addModelIfCompatible(EODatabase.java:575)
at com.webobjects.eoaccess.EODatabaseContext.registeredDatabaseContextForModel(EODatabaseContext.java:1003)
at com.webobjects.eoaccess.EODatabaseContext.registeredDatabaseContextForModel(EODatabaseContext.java:1033)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.webobjects.foundation.NSSelector.invoke(NSSelector.java:358)
at com.webobjects.foundation.NSSelector._safeInvokeSelector(NSSelector.java:110)
at com.webobjects.eoaccess.EODatabaseChannel.setEntity(EODatabaseChannel.java:131)
at com.webobjects.eoaccess.EODatabaseChannel.setCurrentEntity(EODatabaseChannel.java:160)
at com.webobjects.eoaccess.EODatabaseChannel._setCurrentEntityAndRelationshipWithFetchSpecification(EODatabaseChannel.java:740)
at com.webobjects.eoaccess.EODatabaseChannel._selectWithFetchSpecificationEditingContext(EODatabaseChannel.java:808)
at com.webobjects.eoaccess.EODatabaseChannel.selectObjectsWithFetchSpecification(EODatabaseChannel.java:234)
at com.webobjects.eoaccess.EODatabaseContext._objectsWithFetchSpecificationEditingContext(EODatabaseContext.java:3055)
at com.webobjects.eoaccess.EODatabaseContext.objectsWithFetchSpecification(EODatabaseContext.java:3195)
at com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsWithFetchSpecification(EOObjectStoreCoordinator.java:488)
at com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification(EOEditingContext.java:4069)
at er.extensions.eof.ERXEC.objectsWithFetchSpecification(ERXEC.java:1215)
at com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification(EOEditingContext.java:4444)
at net.logicsquad.webobjects.auth.model.auth._Person.fetchPersons(_Person.java:442)
at net.logicsquad.webobjects.auth.model.auth._Person.fetchAllPersons(_Person.java:436)
at net.logicsquad.webobjects.auth.model.auth._Person.fetchAllPersons(_Person.java:432)
at net.logicsquad.survstar.DirectAction.canUseBootstrapCredentials(DirectAction.java:109)
at net.logicsquad.survstar.DirectAction.loginAction(DirectAction.java:150)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.webobjects.appserver.WODirectAction.performActionNamed(WODirectAction.java:144)
at er.extensions.appserver.ERXDirectAction.performActionNamed(ERXDirectAction.java:401)
at er.directtoweb.ERD2WDirectAction.performActionNamed(ERD2WDirectAction.java:463)
at com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:259)
at com.webobjects.appserver._private.WOActionRequestHandler.handleRequest(WOActionRequestHandler.java:161)
at er.extensions.appserver.ERXDirectActionRequestHandler.handleRequest(ERXDirectActionRequestHandler.java:126)
at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:2029)
at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1994)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
at java.lang.Thread.run(Thread.java:680)

At DirectAction.loginAction(), there's a call to Person.fetchAllPersons().  Person is in the same framework model as Organisation, and it has a to-one relationship to Organisation.  This is after I've removed the Organisation entity from the framework model and changed the name of the application entity to "Organisation".  Have I broken the framework model?


-- 
Paul Hoadley
http://logicsquad.net/


 


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    • Re: Using composition instead of inheritance
      • From: Paul Hoadley <email@hidden>
References: 
 >Re: Using composition instead of inheritance (From: Paul Hoadley <email@hidden>)
 >Re: Using composition instead of inheritance (From: Mike Schrag <email@hidden>)
 >Re: Using composition instead of inheritance (From: Paul Hoadley <email@hidden>)
 >Re: Using composition instead of inheritance (From: Mike Schrag <email@hidden>)
 >Re: Using composition instead of inheritance (From: Paul Hoadley <email@hidden>)
 >Re: Using composition instead of inheritance (From: Mike Schrag <email@hidden>)
 >Re: Using composition instead of inheritance (From: Paul Hoadley <email@hidden>)

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