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java Eclipslink未知实体类型

10 月，3 周 Questions & Answers

我正在使用Netbeans生成的一些实体。经过一代人的测试，它们工作得很好。因此，我必须进入下一步，将它们与我的JAXB对象结合起来。在与JAXB对象组合之后，我能够毫无问题地解组XML流。但是，当我尝试将这些类中的任何一个用于任何与实体相关的对象时，我会遇到一些错误

我现在又回到了测试阶段，这就是我所拥有的。我有一个测试类只是从一个简单的main方法运行。与我最初用于测试实体的设置相同。下面您将看到该测试类、类实体、导致JoinAssetToSku问题的实体和错误。我忽略了实体的大多数setter和getter。有人知道这个JoinAssetToSku有什么问题吗。findByTs查询。我不明白它是如何导致这种错误的，它是没有自我意识的

执行测试的代码：

public void testClassEntity(){
        testClass = new Classes(1);
        testClass.setClassId("12");
        testClass.setDescription("The First Class");
        testClass.setTs(new java.sql.Timestamp(new Date().getTime()));
        ClassesJpaController cc = new ClassesJpaController();
            try {
                cc.create(testClass);
            } catch (PreexistingEntityException ex) {
                Logger.getLogger(EntityTest.class.getName()).log(Level.SEVERE, null, ex);
            } catch (Exception ex) {
                Logger.getLogger(EntityTest.class.getName()).log(Level.SEVERE, null, ex);
            }
    }

课程类别：

package entitiesjaxb.cmic.ajrs.com;

import java.io.Serializable;
import java.util.Collection;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlTransient;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Classes", propOrder = {
    "pkId",
    "classId",
    "description",
    "ts"
})

@Entity
@Table(name = "classes")
@NamedQueries({
    @NamedQuery(name = "Classes.findAll", query = "SELECT c FROM Classes c"),
    @NamedQuery(name = "Classes.findByPkId", query = "SELECT c FROM Classes c WHERE c.pkId = :pkId"),
    @NamedQuery(name = "Classes.findByClassId", query = "SELECT c FROM Classes c WHERE c.classId = :classId"),
    @NamedQuery(name = "Classes.findByDescription", query = "SELECT c FROM Classes c WHERE c.description = :description"),
    @NamedQuery(name = "Classes.findByTs", query = "SELECT c FROM Classes c WHERE c.ts = :ts")})
public class Classes implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "pk_id")
    private Integer pkId;
    @Column(name = "class_id")
    @XmlElement(name = "ClassID")
    private String classId;
    @Column(name = "description")
    @XmlElement(name = "Description")
    private String description;
    @Basic(optional = false)
    @Column(name = "ts")
    @Temporal(TemporalType.TIMESTAMP)
    @XmlElement(required = true)
    @XmlSchemaType(name = "dateTime")
    private Date ts;
    @OneToMany(mappedBy = "classes", fetch = FetchType.LAZY)
    @XmlTransient
    private Collection<Categories> categoriesCollection;

    public Classes() {
    }

    public Classes(Integer pkId) {
        this.pkId = pkId;
    }

    public Classes(Integer pkId, Date ts) {
        this.pkId = pkId;
        this.ts = ts;
    }

导致错误的类：

package entitiesjaxb.cmic.ajrs.com;

import java.io.Serializable;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "JoinAssetToSKU", propOrder = {
    "pkId",
    "assetData",
    "skuBasic",
    "ts"
})

@Entity
@Table(name = "join_asset_to_sku")
@NamedQueries({
    @NamedQuery(name = "JoinAssetToSku.findAll", query = "SELECT j FROM JoinAssetToSku j"),
    @NamedQuery(name = "JoinAssetToSku.findByPkId", query = "SELECT j FROM JoinAssetToSku j WHERE j.pkId = :pkId"),
    @NamedQuery(name = "JoinAssetToSku.findByTs", query = "SELECT j FROM JoinAssetToSku j WHERE j.ts = :ts")})
public class JoinAssetToSKU implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "pk_id")
    private Integer pkId;
    @Column(name = "ts")
    @Temporal(TemporalType.TIMESTAMP)
    @XmlElement(required = true)
    @XmlSchemaType(name = "dateTime")
    private Date ts;
    @JoinColumn(name = "pk_sku", referencedColumnName = "pk_id")
    @ManyToOne(fetch = FetchType.LAZY)
    private SKUBasic skuBasic;
    @JoinColumn(name = "pk_asset", referencedColumnName = "pk_id")
    @ManyToOne(fetch = FetchType.LAZY)
    private AssetData assetData;

    public JoinAssetToSKU() {
    }

    public JoinAssetToSKU(Integer pkId) {
        this.pkId = pkId;
    }

    public Integer getPkId() {
        return pkId;
    }

    public void setPkId(Integer pkId) {
        this.pkId = pkId;
    }

我得到的错误

[EL Info]: 2011-04-15 08:26:58.223--ServerSession(2128911821)--EclipseLink, version: Eclipse Persistence Services - 2.0.2.v20100323-r6872
[EL Severe]: 2011-04-15 08:26:58.525--ServerSession(2128911821)--Local Exception Stack: 
Exception [EclipseLink-8034] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Error compiling the query [JoinAssetToSku.findByTs: SELECT j FROM JoinAssetToSku j WHERE j.ts = :ts]. Unknown entity type [JoinAssetToSku].
        at org.eclipse.persistence.exceptions.JPQLException.entityTypeNotFound(JPQLException.java:483)
        at org.eclipse.persistence.internal.jpa.parsing.ParseTreeContext.classForSchemaName(ParseTreeContext.java:138)
        at org.eclipse.persistence.internal.jpa.parsing.SelectNode.getClassOfFirstVariable(SelectNode.java:327)
        at org.eclipse.persistence.internal.jpa.parsing.SelectNode.getReferenceClass(SelectNode.java:316)
        at org.eclipse.persistence.internal.jpa.parsing.ParseTree.getReferenceClass(ParseTree.java:439)
        at org.eclipse.persistence.internal.jpa.parsing.ParseTree.adjustReferenceClassForQuery(ParseTree.java:79)
        at org.eclipse.persistence.internal.jpa.parsing.JPQLParseTree.populateReadQueryInternal(JPQLParseTree.java:103)
        at org.eclipse.persistence.internal.jpa.parsing.JPQLParseTree.populateQuery(JPQLParseTree.java:84)
        at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:202)
        at org.eclipse.persistence.internal.jpa.JPAQuery.processJPQLQuery(JPAQuery.java:106)
        at org.eclipse.persistence.internal.jpa.JPAQuery.prepare(JPAQuery.java:90)
        at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:464)
        at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:430)
        at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQueries(AbstractSession.java:1747)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:409)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:671)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:620)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:228)
        at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:369)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:151)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:207)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:195)
        at controllers.cmic.ajrs.com.ClassesJpaController.getEntityManager(ClassesJpaController.java:33)
        at controllers.cmic.ajrs.com.ClassesJpaController.create(ClassesJpaController.java:42)
        at cmicpojo.EntityTest.testClassEntity(EntityTest.java:33)
        at cmicpojo.Main.main(Main.java:45)

[EL Info]: 2011-04-15 08:26:58.545--ServerSession(2128911821)--EclipseLink, version: Eclipse Persistence Services - 2.0.2.v20100323-r6872
Apr 15, 2011 8:26:58 AM cmicpojo.EntityTest testClassEntity
SEVERE: null
Local Exception Stack: 
Exception [EclipseLink-7092] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot add a query whose types conflict with an existing query. Query To Be Added: [ReadAllQuery(name="KeyFeatures.findByBasicDescription" referenceClass=KeyFeatures jpql="SELECT k FROM KeyFeatures k WHERE k.basicDescription = :basicDescription")] is named: [KeyFeatures.findByBasicDescription] with arguments [[class java.lang.String]].The existing conflicting query: [ReadAllQuery(name="KeyFeatures.findByBasicDescription" referenceClass=KeyFeatures jpql="SELECT k FROM KeyFeatures k WHERE k.basicDescription = :basicDescription")] is named: [KeyFeatures.findByBasicDescription] with arguments: [[class java.lang.String]].
        at org.eclipse.persistence.exceptions.ValidationException.existingQueryTypeConflict(ValidationException.java:895)
        at org.eclipse.persistence.internal.sessions.AbstractSession.addQuery(AbstractSession.java:388)
        at org.eclipse.persistence.internal.sessions.AbstractSession.addQuery(AbstractSession.java:360)
        at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQueries(AbstractSession.java:1749)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:409)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:671)
        at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.login(DatabaseSessionImpl.java:633)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:214)
        at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:195)
        at controllers.cmic.ajrs.com.ClassesJpaController.getEntityManager(ClassesJpaController.java:33)
        at controllers.cmic.ajrs.com.ClassesJpaController.findClasses(ClassesJpaController.java:174)
        at controllers.cmic.ajrs.com.ClassesJpaController.create(ClassesJpaController.java:62)
        at cmicpojo.EntityTest.testClassEntity(EntityTest.java:33)
        at cmicpojo.Main.main(Main.java:45)

共 (1) 个答案

  1. # 1 楼答案

    这是我的一个错误，将生成的实体和生成的JAXB类组合在一起，导致我找到了一些命名不正确的类

    类名应为JoinAssetToSku以匹配命名查询。或者我可以将类名保留为JoinAssetToSKU，并更改命名查询

    我选择更改类名