2

我对域定义的 UUID ID 字段有疑问

CREATE DOMAIN OCTET16 AS CHAR(16) CHARACTER SET OCTETS;

我已将 jpa 的 AttributeConverter 定义为 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) 给出错误，因为它试图转换的不是二进制表示而是 36 个字符的文本形式

我想问题是 jaybird 给出的字段类型为 CHAR(16)，（我已经检查过 ResultSetMetaData），我知道有选项octetsAsBytes，我已经将它与 jbdc url 一起使用

jdbc:firebirdsql:localhost:D:/aktarma-12-13/VERI.FDB?octetsAsBytes=true

没有结果。

我的设置很复杂

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 会给我字段类型为 BINARY 时，问题就会消失。但是怎么做？有什么建议么。

我只是不想将 id 保存为 char(32) 或 char(36)。

编辑：切换到 Jaybird 3.beta-2 后，可以清楚地看到第三行invalid stream header: F1505533。这是一部分 ASCII 解码的 id（char(16) 字符集八位字节）。如何让 JPA 接受这个值作为原始字节并将其传递给 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
4

1 回答 1

3

我使用 eclipselink 2.6.4 做了一个简单的项目来测试它，并且使用 Jaybird 2.2.12（octetsAsBytes=true需要设置）和 Jaybird 3.0.0-beta-2 都可以工作：

代码也在：https ://gist.github.com/mrotteveel/273aa9e836880211820f54ff21164ec1

待办事项实体：

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;
    }
}

UUID属性转换器：

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);
    }
}

主要的：

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&amp;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)
);

运行几次后输出：

[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
于 2017-01-13T15:04:42.440 回答