爲什麼Ebean不能識別非原始的@Transient成員變量？

我想從Ebean持久排除items。爲什麼Ebean不能識別非原始的@Transient成員變量？

這裏是我的豆：

package entity; 

import java.util.Date; 

import javax.persistence.Entity; 
import javax.persistence.Id; 
import javax.persistence.Table; 
import javax.persistence.Transient; 

import com.avaje.ebean.validation.Length; 
import com.avaje.ebean.validation.NotNull; 

@Entity() 
@Table(name="profile") 
public class Profile { 

    private Item[] items; 

    @Transient 
    public Item[] getItems() { 
     return items; 
    } 

    public void setItems(Item[] items) { 
     this.items = items; 
    } 

    @Id 
    private int id; 

    @Length(max=50) 
    @NotNull 
    private String externalReference; 

    ...

，但我得到了下面的堆棧跟蹤：

[20:16:18] [Server thread/ERROR]: Was unable to use reflection to find a constructor and appropriate getters forimmutable type class [Lentity.Item;. The errors while looking for the getter methods follow: 
[20:16:18] [Server thread/ERROR]: Error with entity.Profile field:items 
java.lang.RuntimeException: Unable to use reflection to build ImmutableMeta for class [Lentity.Item;. Associated Errors trying to find a constructor and getter methods have been logged 
     at com.avaje.ebeaninternal.server.type.reflect.ImmutableMetaFactory.createImmutableMeta(ImmutableMetaFactory.java:71) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.type.DefaultTypeManager.recursiveCreateScalarTypes(DefaultTypeManager.java:224) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProp(DeployCreateProperties.java:367) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProp(DeployCreateProperties.java:387) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProperties(DeployCreateProperties.java:168) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.parse.DeployCreateProperties.createProperties(DeployCreateProperties.java:94) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createDeployBeanInfo(BeanDescriptorManager.java:1041) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentInitial(BeanDescriptorManager.java:552) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:269) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:143) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:209) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:63) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:78) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPlugin.init(JavaPlugin.java:344) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:104) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:67) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at profile.ProfilePlugin.<init>(ProfilePlugin.java:16) [crm-profile.jar:?] 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [?:1.7.0_45] 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [?:1.7.0_45] 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.7.0_45] 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [?:1.7.0_45] 
     at java.lang.Class.newInstance(Class.java:374) [?:1.7.0_45] 
     at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:294) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:723) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.Bukkit.reload(Bukkit.java:548) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:625) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1299) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1159) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_45] 
     at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_45] 
     at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:690) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:360) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:646) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:550) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45] 
[20:16:18] [Server thread/ERROR]: Error in deployment 
javax.persistence.PersistenceException: Error with [entity.Profile] I believe it is not enhanced but it's superClass [class java.lang.Object] is? (You are not allowed to mix enhancement in a single inheritance hierarchy) 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1393) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createByteCode(BeanDescriptorManager.java:1161) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1077) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:584) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:271) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:143) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:209) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.core.DefaultServerFactory.createServer(DefaultServerFactory.java:63) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebean.EbeanServerFactory.create(EbeanServerFactory.java:78) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPlugin.init(JavaPlugin.java:344) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.PluginClassLoader.initialize(PluginClassLoader.java:104) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:67) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at profile.ProfilePlugin.<init>(ProfilePlugin.java:16) [crm-profile.jar:?] 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [?:1.7.0_45] 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [?:1.7.0_45] 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.7.0_45] 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:526) [?:1.7.0_45] 
     at java.lang.Class.newInstance(Class.java:374) [?:1.7.0_45] 
     at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:52) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.java:294) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:723) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.Bukkit.reload(Bukkit.java:548) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:625) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1299) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1159) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_45] 
     at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_45] 
     at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:690) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:360) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:646) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:550) [craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at java.lang.Thread.run(Thread.java:744) [?:1.7.0_45] 
Caused by: java.lang.IllegalArgumentException: field [items] not found in [entity.Profile$$EntityBean$crm-profile][id, externalReference, playerId, location, clan, playerClass, visible, deleted, health, level, pvpKills, pvpDeaths, mobKills, mobDeaths, onlineDuration, durationSinceLastDeath, lastUpdated, lastDeathDurationCheck] 
     at com.avaje.ebeaninternal.server.reflect.EnhanceBeanReflect.getFieldIndex(EnhanceBeanReflect.java:139) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.reflect.EnhanceBeanReflect.getGetter(EnhanceBeanReflect.java:143) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1377) ~[craftbukkit-1.10.2.jar:git-Bukkit-0ebb9c7] 
     ... 40 more

可能有人請告訴我如何正確地宣佈該成員變量items作爲@Transient使其排除持久性？

來源

2016-11-23 crm

爲了解決這個問題，你需要將@Transient標註適用於現場items（不getItems()），如下圖所示：

@Entity() 
@Table(name="profile") 
public class Profile { 

    @Id 
    private int id; 

    @Transient 
    private Item[] items; 

    public Item[] getItems() { 
    return items; 
    } 

    ... 
}

PS：當你有@Transient領域，確保你將JPA註釋一直放在getter方法或字段上，而不是在兩個地方分發它們。在您當前的代碼中，其他JPA註釋（如@Id）已標記爲除@Transient之外的字段。

它的伎倆，但是我無法找到JPA規範或休眠上這樣的東西。

來源

2016-11-23 20:41:00 developer

不幸的是，這不是我的解決方案。你知道你使用的是什麼版本的Ebean嗎？我在Ebean中發現了這個錯誤，並且在4.0.1版中顯然已修復：https：//github.com/ebean-orm/ebean/issues/11。目前還不清楚Ebean Minecraft craftbukkit 1.10.2的使用版本（我猜猜舊版本）。 – crm

我找不到與您分享的問題鏈接有關的任何問題 – developer

噢對不起，我修復了鏈接：https：//github.com/ebean-orm/ebean/issues/111 – crm

這是在之前4.0.1 EBean版本的bug。周圍的工作是：

更改屬性列表或設置，而不是陣列。

馬克與「短暫的」，以及如果可能的話，也就是說，如果你不需要使用Java序列化場上場。

在本相關bug report說明。

來源

2016-11-26 11:36:50 crm

爲什麼Ebean不能識別非原始的@Transient成員變量？

回答

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