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https://issues.apache.org/jira/browse/OPENJPA-336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12543698
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Chad Patras commented on OPENJPA-336:
-------------------------------------
The same issue occurs when a mapped class has no field of the same data type
matching the property accessor. For example.
public class AWrapper
{
private StringBuffer myString = new StringBuffer();
public void setMyString(String string) {
myString.setLength(0);
myString.append(string);
}
public String getMyString() {
return myString.toString();
}
}
> PCEnhancer throws an NPE when run with DefaultAccessType=PROPERTY on a
> MappedSuperclass
> ---------------------------------------------------------------------------------------
>
> Key: OPENJPA-336
> URL: https://issues.apache.org/jira/browse/OPENJPA-336
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 1.0.0
> Reporter: Marc Prud'hommeaux
>
> With the following class:
> package test;
> import javax.persistence.*;
> @MappedSuperclass public abstract class MyMappedSuperclass {
> public void doSometing() { }
> }
> Running the PCEnhancer with DefaultAccessType=PROPERTY as follows:
> java org.apache.openjpa.enhance.PCEnhancer -MetaDataFactory
> 'jpa(DefaultAccessType=PROPERTY)' -Log DefaultLevel=TRACE
> test.MyMappedSuperclass
> Causes an NPE:
> Exception in thread "main" <openjpa-1.0.0-r420667:568385 nonfatal general
> error> org.apache.openjpa.util.GeneralException: null
> at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:470)
> at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:4342)
> at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:4284)
> at org.apache.openjpa.enhance.PCEnhancer.main(PCEnhancer.java:4256)
> Caused by: java.lang.NullPointerException
> at
> org.apache.openjpa.enhance.PCEnhancer.toBackingFieldName(PCEnhancer.java:3664)
> at
> org.apache.openjpa.enhance.PCEnhancer.getfield(PCEnhancer.java:3578)
> at
> org.apache.openjpa.enhance.PCEnhancer.addDetachedStateMethods(PCEnhancer.java:3540)
> at
> org.apache.openjpa.enhance.PCEnhancer.addAttachDetachCode(PCEnhancer.java:3492)
> at org.apache.openjpa.enhance.PCEnhancer.run(PCEnhancer.java:457)
> ... 3 more
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