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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: Paul Hoadley <email@hidden>
  • Date: Sun, 03 Jun 2012 08:31:12 +0930
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: Mike Schrag <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>)

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