我对域
定义的UUID ID字段有疑问CREATE DOMAIN OCTET16 AS CHAR(16) CHARACTER SET OCTETS;
我已经为jpa定义了AttributeConverter import java.util.UUID;
import javax.persistence.AttributeConverter;
import javax.persistence.Converter;
import com.ekser.nakkash.icdv.tools.UUIDTools;
@Converter
public class UUIDAttributeConverter implements AttributeConverter<UUID, byte[]> {
@Override
public byte[] convertToDatabaseColumn(UUID arg0) {
return UUIDTools.asBytes((UUID) arg0);
}
@Override
public UUID convertToEntityAttribute(byte[] arg0) {
return UUIDTools.asUUID((byte[])arg0);
}
}
并将jpa字段定义为
@Id
@Convert(converter = UUIDAttributeConverter.class)
private UUID id;
但是jpa（Eclipselink + Eclipse Gemini）给出了错误，因为它试图转换不是二进制表示而是36个字符的文本形式
我认为问题是jaybird将字段类型赋予CHAR（16），（我已经使用ResultSetMetaData检查过），我知道有选项octetsAsBytes，我已经将它与jbdc url一起使用了
jdbc:firebirdsql:localhost:D:/aktarma-12-13/VERI.FDB?octetsAsBytes=true
没有结果。
我的设置非常复杂
Java 1.8
Efxclipse 2.4.0 RCP
Firebird 2.5.6
Jaybird 2.2.12 JDK_1.8
HikariCP 2.4.1
EclipseLink 2.6.4
Eclipse Gemini 1.2.0.M1
所以我认为当ResultSetMetaData给我类型的字段作为BINARY时，问题就会消失。但是怎么样？任何建议。
我只是不想将id保存为char（32）或char（36）。
修改：切换到Jaybird 3.beta-2后，
人们可以清楚地看到第三行invalid stream header: F1505533。这是ASCII解码的id（char（16）字符集八位字节）。如何使JPA接受这个值作为原始字节并使其传递给UUIDAttributeConverter类?? !!
Exception in thread "JavaFX Application Thread" javax.persistence.PersistenceException: Exception [EclipseLink-66] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Could not deserialize object from byte array.
Internal Exception: java.lang.RuntimeException: java.io.StreamCorruptedException: invalid stream header: F1505533
Mapping: org.eclipse.persistence.mappings.DirectToFieldMapping[id-->YAZDIRMA_TURLERI.ID]
Descriptor: RelationalDescriptor(com.ekser.nakkash.icdv.pojo.YazdirmaTuru --> [DatabaseTable(YAZDIRMA_TURLERI)])
at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:484)
at com.ekser.nakkash.icdv.gui.MainPartIcdv.lambda$1(MainPartIcdv.java:180)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:380)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:416)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:415)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Caused by: Exception [EclipseLink-66] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Could not deserialize object from byte array.
Internal Exception: java.lang.RuntimeException: java.io.StreamCorruptedException: invalid stream header: F1505533
Mapping: org.eclipse.persistence.mappings.DirectToFieldMapping[id-->YAZDIRMA_TURLERI.ID]
Descriptor: RelationalDescriptor(com.ekser.nakkash.icdv.pojo.YazdirmaTuru --> [DatabaseTable(YAZDIRMA_TURLERI)])
at org.eclipse.persistence.exceptions.DescriptorException.notDeserializable(DescriptorException.java:1232)
at org.eclipse.persistence.mappings.converters.SerializedObjectConverter.convertDataValueToObjectValue(SerializedObjectConverter.java:144)
at org.eclipse.persistence.mappings.foundation.AbstractDirectMapping.getObjectValue(AbstractDirectMapping.java:616)
at org.eclipse.persistence.mappings.foundation.AbstractDirectMapping.valueFromRow(AbstractDirectMapping.java:1220)
at org.eclipse.persistence.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:1539)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:462)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:1005)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:899)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:852)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:735)
at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:689)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:805)
at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:962)
at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:573)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1175)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:904)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1134)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:460)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1222)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2896)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1857)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1839)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1804)
at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:258)
at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:473)
... 56 more
Caused by: java.lang.RuntimeException: java.io.StreamCorruptedException: invalid stream header: F1505533
at org.eclipse.persistence.sessions.serializers.JavaSerializer.deserialize(JavaSerializer.java:57)
at org.eclipse.persistence.mappings.converters.SerializedObjectConverter.convertDataValueToObjectValue(SerializedObjectConverter.java:142)
... 79 more
Caused by: java.io.StreamCorruptedException: invalid stream header: F1505533
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at org.eclipse.persistence.internal.helper.CustomObjectInputStream.<init>(CustomObjectInputStream.java:37)
at org.eclipse.persistence.sessions.serializers.JavaSerializer.deserialize(JavaSerializer.java:53)
... 80 more
答案 0 :(得分：1)
我使用eclipselink 2.6.4做了一个简单的项目来测试这个，并且使用Jaybird 2.2.12（需要设置octetsAsBytes=true）和Jaybird 3.0.0-beta-2它都有效：
代码也在：https://gist.github.com/mrotteveel/273aa9e836880211820f54ff21164ec1
Todo实体：
package com.example.eclipselink.entity;
import com.example.eclipselink.converter.UUIDAttributeConverter;
import javax.persistence.Convert;
import javax.persistence.Entity;
import javax.persistence.Id;
import java.util.UUID;
@Entity
public class Todo {
@Id
@Convert(converter = UUIDAttributeConverter.class)
private UUID id;
public UUID getId() {
return id;
}
public void setId(UUID id) {
this.id = id;
}
}
UUIDAttributeConverter：
package com.example.eclipselink.converter;
import javax.persistence.AttributeConverter;
import javax.persistence.Converter;
import java.nio.ByteBuffer;
import java.util.UUID;
@Converter
public class UUIDAttributeConverter implements AttributeConverter<UUID, byte[]> {
@Override
public byte[] convertToDatabaseColumn(UUID uuid) {
if (uuid == null) return null;
byte[] buffer = new byte[16];
ByteBuffer bb = ByteBuffer.wrap(buffer);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return buffer;
}
@Override
public UUID convertToEntityAttribute(byte[] bytes) {
if (bytes == null) return null;
ByteBuffer bb = ByteBuffer.wrap(bytes);
long high = bb.getLong();
long low = bb.getLong();
return new UUID(high, low);
}
}
主：
package com.example.eclipselink;
import com.example.eclipselink.entity.Todo;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import java.util.List;
import java.util.UUID;
public class Main {
private static final String PERSISTENCE_UNIT_NAME = "todos";
private static EntityManagerFactory factory;
public static void main(String[] args) {
factory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
EntityManager em = factory.createEntityManager();
// read the existing entries and write to console
Query q = em.createQuery("select t from Todo t");
List<Todo> todoList = q.getResultList();
for (Todo todo : todoList) {
System.out.println(todo.getId());
}
System.out.println("Size: " + todoList.size());
// create new todo
em.getTransaction().begin();
Todo todo = new Todo();
todo.setId(UUID.randomUUID());
em.persist(todo);
em.getTransaction().commit();
em.close();
}
}
持久性上下文：
<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="todos" transaction-type="RESOURCE_LOCAL">
<class>com.example.eclipselink.entity.Todo</class>
<class>com.example.eclipselink.converter.UUIDAttributeConverter</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.firebirdsql.jdbc.FBDriver" />
<property name="javax.persistence.jdbc.url"
value="jdbc:firebirdsql://localhost/d:/data/db/fb3/eclipselink.fdb?charSet=UTF-8&octetsAsBytes=true" />
<property name="javax.persistence.jdbc.user" value="sysdba" />
<property name="javax.persistence.jdbc.password" value="masterkey" />
</properties>
</persistence-unit>
</persistence>
DDL：
CREATE TABLE TODO
(
ID char(16) CHARACTER SET OCTETS NOT NULL,
CONSTRAINT PK_TODO PRIMARY KEY (ID)
);
几次运行后的输出：
[EL Info]: 2017-01-13 15:59:14.733--ServerSession(1139700454)--EclipseLink, version: Eclipse Persistence Services - 2.6.4.v20160829-44060b6
[EL Info]: connection: 2017-01-13 15:59:15.093--ServerSession(1139700454)--/file:/D:/Development/project/eclipselink/target/classes/_todos login successful
4c062d69-849e-4946-8e25-edfc5d7441be
dac10396-cfe2-4fb0-b048-65f954a82da5
8dab770e-ebd2-4ebc-a29b-4b8aae0b449a
9d376c67-fdc5-4e21-8013-f71cde5119aa
Size: 4