NullPointerException运行DataNucleus Enhancer 3.1.0版本 [英] NullPointerException running DataNucleus Enhancer 3.1.0-release
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问题描述
我正在从DOS运行DataNucleus增强器，如下所示：
I am running DataNucleus enhancer from DOS as follows:
java -cp C:\Users\Chania\workspace\myproject\war\WEB-INF\classes\;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-enhancer-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-core-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\deps\jdo-api-3.1-SNAPSHOT-20110926.jar;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-api-jdo-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\deps\log4j-1.2.14.jar;C:\repo\datanucleus-full-3.1.0-release\deps\asm-4.0.jar -Dlog4j.configuration=file:C:\repo\datanucleus-full-3.1.0-release\log4j.properties org.datanucleus.enhancer.DataNucleusEnhancer -v C:\Users\Chania\workspace\myproject\war\WEB-INF\classes\com\myproject\domain\*.class > logfile.txt
我正在使用的Java版本是：
The Java version that I'm using is:
java version "1.6.0_27"
我得到的错误如下：
...
308 [main] DEBUG DataNucleus.Persistence - Added converter for java.net.URI<->java.lang.String using org.datanucleus.store.types.converters.URIStringConverter
308 [main] DEBUG DataNucleus.Persistence - Added converter for java.net.URL<->java.lang.String using org.datanucleus.store.types.converters.URLStringConverter
309 [main] DEBUG DataNucleus.Persistence - Added converter for java.util.UUID<->java.lang.String using org.datanucleus.store.types.converters.UUIDStringConverter
309 [main] DEBUG DataNucleus.Persistence - TypeConverter for javax.time.calendar.LocalDate<->java.lang.String ignored since java type not present in CLASSPATH
310 [main] DEBUG DataNucleus.Persistence - TypeConverter for javax.time.calendar.LocalTime<->java.lang.String ignored since java type not present in CLASSPATH
311 [main] DEBUG DataNucleus.Persistence - TypeConverter for javax.time.calendar.LocalTime<->java.lang.Long ignored since java type not present in CLASSPATH
312 [main] DEBUG DataNucleus.Persistence - TypeConverter for javax.time.calendar.LocalDateTime<->java.lang.String ignored since java type not present in CLASSPATH
312 [main] DEBUG DataNucleus.Persistence - Type converter support loaded
312 [main] DEBUG DataNucleus.MetaData - MetaDataManager : Input=(XML,Annotations), XML-Validation=false, XML-Suffices=(persistence=*.jdo, orm=orm, query=*.jdoquery), JDO-listener=false
338 [main] DEBUG DataNucleus.MetaData - MetaData Management : Loading Metadata for classes "[com.myproject.domain.Record, com.myproject.domain.RecordSummary, com.myproject.domain.Comment]" ...
411 [main] DEBUG DataNucleus.MetaData - Class "com.myproject.domain.Record" has been specified with JDO annotations so using those.
596 [main] DEBUG DataNucleus.MetaData - Class "com.myproject.domain.RecordSummary" has been specified with JDO annotations so using those.
600 [main] DEBUG DataNucleus.MetaData - Class "com.myproject.domain.Comment" has been specified with JDO annotations so using those.
Errors were encountered when loading the specified MetaData files and classes. See the nested exceptions for details
604 [main] ERROR DataNucleus.Enhancer - 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:536)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:734)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:525)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1258)
Caused by: java.lang.NullPointerException
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:1682)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:206)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:171)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2650)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:496)
... 3 more
Nested Throwables StackTrace:
java.lang.NullPointerException
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:1682)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:206)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:171)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2650)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:496)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:734)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:525)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1258)
DataNucleus Enhancer completed with an error. Please review the enhancer log for full details. Some classes may have been enhanced but some caused errors
增强类的来源如下：
@PersistenceCapable(detachable = "true")
public class Record implements Serializable, Cacheable<String> {
private static final long serialVersionUID = 9022509306966814904L;
@PrimaryKey
@Persistent(defaultFetchGroup = "true", valueStrategy = IdGeneratorStrategy.IDENTITY)
private String id;
@Name
@Persistent(defaultFetchGroup = "true")
private String name;
@Name
@Persistent(defaultFetchGroup = "true")
private String surname;
@Persistent(defaultFetchGroup = "true")
private Date dateOfBirth;
@Persistent(defaultFetchGroup = "true")
private Date dateRecorded;
@Persistent(defaultFetchGroup = "true")
private String locationId;
@Persistent(embedded = "true", defaultFetchGroup = "true")
private CustomLocation customLocation;
@Persistent(defaultFetchGroup = "true")
private Category category;
@Persistent(embedded = "true", defaultFetchGroup = "true")
private CustomCategory customCategory;
@Persistent(defaultFetchGroup = "true")
private String description;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private List<StoredImageInfo> images;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private List<StoredAudioInfo> audio;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private List<StoredFileInfo> files;
@Persistent(defaultFetchGroup = "true")
private ModerationMode moderationMode;
@Persistent(defaultFetchGroup = "true")
private VisibilityMode visibilityMode;
@Persistent(embedded = "true", defaultFetchGroup = "true")
private UserProfileSummary owner;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private Map<String, UserProfileSummary> editors;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private Map<String, UserProfileSummary> connections;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private Map<String, RecordSummary> recordConnections;
@Persistent(defaultFetchGroup = "true")
private RecordType type;
@Persistent(defaultFetchGroup = "true")
private Date expiry;
public Record() {
}
public Record(Record copy) {
deepCopy(copy);
}
...
}
@PersistenceCapable(embeddedOnly = "true")
public class RecordSummary implements Serializable {
private static final long serialVersionUID = 9024309306966814904L;
@Persistent(defaultFetchGroup = "true")
private String id;
@Persistent(defaultFetchGroup = "true")
private RecordRole role;
@Persistent(defaultFetchGroup = "true")
private String name;
@Persistent(defaultFetchGroup = "true")
private String surname;
@Persistent(defaultFetchGroup = "true")
private Date dateOfBirth;
@Persistent(defaultFetchGroup = "true")
private Date dateRecorded;
@SuppressWarnings("unused")
private RecordSummary() {
// for serialization
}
...
}
@PersistenceCapable(detachable = "true")
public class Comment implements Attachable<String>, Serializable {
private static final long serialVersionUID = -7624377549524333808L;
@PrimaryKey
@Persistent(defaultFetchGroup = "true", valueStrategy = IdGeneratorStrategy.IDENTITY)
private String id;
@Persistent(defaultFetchGroup = "true")
private String recordId;
@Persistent(defaultFetchGroup = "true")
private String username;
@Persistent(defaultFetchGroup = "true")
private Date date;
@Persistent(defaultFetchGroup = "true")
private String content;
@SuppressWarnings("unused")
private Comment() {
// for serialization
}
...
}
我没有在datanucleus Enhancer 3.0-release中遇到任何此类异常（尽管有其他3.0的问题：问题1 ，问题2 ）。 这是DataNucleus 3.1的错误，还是我做错了什么？
I am not getting any such Exceptions with datanucleus enhancer 3.0-release (albeit, having other problems with 3.0: problem 1, problem 2). Is this a bug with DataNucleus 3.1 or am I doing something wrong?
更新：DataNucleus Enhancer抛出 NullPointerException 标记为 @Persistent（embeddedElement = true）的所有列表字段。这很可能是DataNucleus 3.1 Enhancer的错误。
UPDATE: DataNucleus Enhancer throws a NullPointerException for all List fields marked with @Persistent(embeddedElement = "true"). It is highly likely that this is a bug with the DataNucleus 3.1 Enhancer.
更新2 ：应要求，我提供了可复制的最少代码问题：
UPDATE 2: Upon request, I am including minimal code that reproduces the problem:
@PersistenceCapable(detachable = "true")
public class Record {
@PrimaryKey
@Persistent(defaultFetchGroup = "true", valueStrategy = IdGeneratorStrategy.IDENTITY)
private String id;
@Persistent(embeddedElement = "true", defaultFetchGroup = "true")
private List<MyEmbeddedElement> aList;
public Record() {
}
}
@PersistenceCapable(embeddedOnly = "true")
public class MyEmbeddedElement {
@Persistent
private String myField;
}
错误：
730 [main] DEBUG DataNucleus.MetaData - Class "com.myproject.domain.Record" has been specified with JDO annotations so using those.
760 [main] DEBUG DataNucleus.MetaData - Class "com.myproject.domain.MyEmbeddedElement" has been specified with JDO annotations so using those.
Errors were encountered when loading the specified MetaData files and classes. See the nested exceptions for details
763 [main] ERROR DataNucleus.Enhancer - 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:536)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:734)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:525)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1258)
Caused by: java.lang.NullPointerException
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:1682)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:206)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:171)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2650)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:496)
... 3 more
Nested Throwables StackTrace:
java.lang.NullPointerException
at org.datanucleus.api.jdo.metadata.JDOAnnotationReader.processMemberAnnotations(JDOAnnotationReader.java:1682)
at org.datanucleus.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:206)
at org.datanucleus.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:171)
at org.datanucleus.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:2650)
at org.datanucleus.metadata.MetaDataManager.loadClasses(MetaDataManager.java:496)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:734)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:525)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1258)
DataNucleus Enhancer completed with an error. Please review the enhancer log for full details. Some classes may have been enhanced but some caused errors
UPDATE 3 ：此从3.0.2开始的所有DataNucleus版本中都存在问题。
UPDATE 3: This problem exists in all DataNucleus releases starting with 3.0.2.
推荐答案
当我在应用程序中执行嵌入式集合时，我会这样做
When I do an embedded collection in my app I do
@Element(embedded="true")
Collection<OtherType> myCollField;
这对我有用，并且看起来更符合逻辑地指定嵌入式元素。
and that works for me, and looks more logical way of specifying embedded elements.
您的地图字段也有误...地图没有元素，它具有键和值
Also your map fields are wrong ... a map has no "element", it has "key" and "value"
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