我正在使用 Netbeans 生成的一些实体。一代之后，我对它们进行了测试，它们工作正常。因此，我必须进行下一步并将它们与我的 JAXB 对象结合起来。与 JAXB 对象结合后，我可以毫无问题地解组我的 XML 流。但是当我尝试将这些类中的任何一个用于与实体相关的任何东西时，我都会遇到一些错误。
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。我最初用于测试实体的相同设置。您将在下面看到该测试类、Classes 实体、导致问题 JoinAssetToSku 和错误的实体。我忽略了实体的大多数设置者和获取者。有谁知道这个 JoinAssetToSku.findByTs 查询有什么问题。我不明白它是如何导致该错误的，它不是自我意识的！？
进行测试的代码：
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);
}
}
类：
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)