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Thread: how to tell enhancer to ignore a "get(String)" method?

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jhudson
Newbie

US
Joined: Feb 2, 2010
Post Count: 2
Status: Offline


how to tell enhancer to ignore a "get(String)" method?

Hello,

I am using the Google App Engine Eclipse plugin and get an error when I save a Java class with a get(String) method.

The enhancer is throwing a NullPointerException. I have added the transient annotation and don't know what else I can do to avoid this issue. Can anyobody please give me some advice?

I am using datanucleus-jpa-1.1.5.jar

Thank you very much.

The referenced code is below:

@Entity
public class TestEntity implements Serializable {

	private String dummyProperty;

	public String getDummyProperty() {
		return dummyProperty;
	}

	public void setDummyProperty(String dummyProperty) {
		this.dummyProperty = dummyProperty;
	}

	@Transient
	public Object get(String key) {
		return null;
	}
}

And, here is the stack trace:

DataNucleus Enhancer (version 1.1.4) : Enhancement of classes
Errors were encountered when loading the specified MetaData files and classes. See the nested exceptions for details
Feb 2, 2010 1:45:24 PM org.datanucleus.enhancer.DataNucleusEnhancer main
SEVERE: DataNucleus Enhancer completed with an error. Please review the enhancer log for full details. Some classes may have been enhanced but some caused errors
Errors were encountered when loading the specified MetaData files and classes. See the nested exceptions for details
org.datanucleus.exceptions.NucleusUserException: Errors were encountered when loading the specified MetaData files and classes. See the nested exceptions for details
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:426)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:743)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:545)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1252)
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.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:57)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:60)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
Caused by: java.lang.NullPointerException
at org.datanucleus.jpa.metadata.JPAAnnotationReader.processMemberAnnotations(JPAAnnotationReader.java:8
53)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotation
Reader.java:159)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl
.java:136)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2278)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:385)
... 10 more
Nested Throwables StackTrace:
DataNucleus Enhancer completed with an error. Please review the enhancer log for full details. Some classes may have been enhanced but some caused errors
java.lang.NullPointerException
DataNucleus Enhancer completed and no classes were enhanced. Consult the log for full details
at org.datanucleus.jpa.metadata.JPAAnnotationReader.processMemberAnnotations(JPAAnnotationReader.java:8
53)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotation
Reader.java:159)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl
.java:136)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2278)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:385)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:743)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:545)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1252)
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.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:57)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:60)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)

[Feb 2, 2010 7:52:25 PM]

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andy
Expert

UK
Joined: Mar 13, 2004
Post Count: 5233
Status: Offline


Re: how to tell enhancer to ignore a "get(String)" method?

Rename the method to be something else (e.g getXXX). Annotations code had some check on a method being a Java bean getter, checking if it started "get", but neglected to check if it was longer than that. SVN code works, but that won't help you until Google bother updating their plugin to use DN 2.0
----------------------------------------
-Andy smile

[Feb 2, 2010 8:58:06 PM]

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jhudson
Newbie

US
Joined: Feb 2, 2010
Post Count: 2
Status: Offline


Re: how to tell enhancer to ignore a "get(String)" method?

Thank you very much Andy.

I appreciate the response. Unfortunately I can't rename the method because I am implementing an external interface (GXT's ModelBean). Oh well, I'll just hope that GAE updates their plugin soon. Again, thanks.

[Feb 2, 2010 9:36:20 PM]

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