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내 JPA 구현 프레임 워크로 Toplink Grid (Eclipselink)를 사용하고 있습니다. 나는 포함 가능한 개체 쿼리 기준을 사용하려고하는 동안 아래와 같은 AA 예외를 충족삽입 가능한 개체를 쿼리하는 데 기준 사용
:
Exception [EclipseLink-6119] (Eclipse Persistence Services - 2.1.2.v20101206-r8635): org.eclipse.persistence.exceptions.QueryException
Exception Description: The join expression
Query Key conInfo
Base domain.de1003.Employee is not valid, or for a mapping type that does not support joining.
Query: ReportQuery(referenceClass=Employee)
at org.eclipse.persistence.exceptions.QueryException.mappingForExpressionDoesNotSupportJoining(QueryException.java:659)
at org.eclipse.persistence.internal.queries.JoinedAttributeManager.prepareJoinExpression(JoinedAttributeManager.java:851)
at org.eclipse.persistence.internal.queries.JoinedAttributeManager.prepareJoinExpressions(JoinedAttributeManager.java:778)
at org.eclipse.persistence.internal.queries.ReportItem.initialize(ReportItem.java:171)
at org.eclipse.persistence.queries.ReportQuery.prepare(ReportQuery.java:1035)
at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:509)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.checkPrepare(ObjectLevelReadQuery.java:822)
at org.eclipse.persistence.queries.DatabaseQuery.checkPrepare(DatabaseQuery.java:470)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:710)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1038)
at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:381)
at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1124)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2917)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1291)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1273)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1247)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.executeReadQuery(EJBQueryImpl.java:479)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.getResultList(EJBQueryImpl.java:714)
내가 노력 코드는 다음과 같습니다 :
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<ContactInfo> cq = cb.createQuery(ContactInfo.class);
Root<Employee> root = cq.from(Employee.class);
cq.select(root.<ContactInfo> get("conInfo"));
cq.where(cb.le(root.<Long> get("employId"), 3));
TypedQuery<ContactInfo> q = em.createQuery(cq);
List<ContactInfo> results = q.getResultList();
가있는 CONTACTINFO가있다 주소 및 전화 세트로 구성된 임베드 가능 클래스. 전화는 문자열입니다.
도움이 될 것입니다. JPA - Criteria API and EmbeddedId
하지만 내 질문에 해결되지 않은 :
나는이 문제와 관련된 질문을 확인하십시오.
그리고 예제 코드를 찾을 수 없습니다.
다음과 같이 엔티티 코드 :
package domain.de1003;
import java.io.IOException;
import java.io.Serializable;
import java.util.List;
import javax.persistence.AttributeOverrides;
import javax.persistence.AttributeOverride;
import javax.persistence.CascadeType;
import javax.persistence.CollectionTable;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Version;
import oracle.eclipselink.coherence.integrated.config.GridCacheCustomizer;
import org.eclipse.persistence.annotations.Customizer;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
@Entity(name="Employee")
@Table(name="EMPLOYEE")
@Customizer(oracle.eclipselink.coherence.integrated.config.GridCacheCustomizer.class)
public class Employee implements PortableObject,Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name = "EM_ID")
private long employId;
@Column(name = "FIRSTNAME")
private String firstName;
@Column(name = "LASTNAME")
private String lastName;
@Embedded
@AttributeOverrides({
@AttributeOverride(name="homePhone", [email protected](name="HOMEPHONE")),
@AttributeOverride(name="workPhone", [email protected](name="WORKPHONE"))
})
private ContactInfo conInfo;
@Version
private long version;
public long getEmployId() {
return employId;
}
public void setEmployId(long employId) {
this.employId = employId;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public ContactInfo getConInfo() {
return conInfo;
}
public void setConInfo(ContactInfo conInfo) {
this.conInfo = conInfo;
}
public long getVersion() {
return version;
}
public void setVersion(long version) {
this.version = version;
}
@Override
public void readExternal(PofReader pofReader) throws IOException {
employId = pofReader.readLong(1);
firstName = pofReader.readString(2);
lastName = pofReader.readString(3);
version = pofReader.readLong(4);
}
@Override
public void writeExternal(PofWriter pofWriter) throws IOException {
pofWriter.writeLong(1, employId);
if(firstName != null) pofWriter.writeString(2, firstName);
if(lastName != null) pofWriter.writeString(3,lastName);
pofWriter.writeLong(4, version);
}
@Override
public String toString() {
return "["
+ "employId = " + employId
+ " firstName = " + firstName
+ " lastName = " + lastName
+ " contact inforamtion: " + conInfo
+ "]";
}
}
과 equivale를 들어 법인 CONTACTINFO
package domain.de1003;
import java.io.IOException;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import oracle.eclipselink.coherence.integrated.config.GridCacheCustomizer;
import org.eclipse.persistence.annotations.Customizer;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
@Embeddable
@Customizer(oracle.eclipselink.coherence.integrated.config.GridCacheCustomizer.class)
public class ContactInfo implements PortableObject,Serializable{
private static final long serialVersionUID = 1L;
@Column(name = "ADDRESS")
private String address;
@Column(name = "HOMEPHONE")
private String homePhone;
@Column(name = "WORKPHONE")
private String workPhone;
@Column(name = "CELLPHONE")
private String cellPhone;
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getHomePhone() {
return homePhone;
}
public void setHomePhone(String homePhone) {
this.homePhone = homePhone;
}
public String getWorkPhone() {
return workPhone;
}
public void setWorkPhone(String workPhone) {
this.workPhone = workPhone;
}
public String getCellPhone() {
return cellPhone;
}
public void setCellPhone(String cellPhone) {
this.cellPhone = cellPhone;
}
@Override
public void readExternal(PofReader pofReader) throws IOException {
address = pofReader.readString(1);
homePhone = pofReader.readString(2);
workPhone = pofReader.readString(3);
cellPhone = pofReader.readString(4);
}
@Override
public void writeExternal(PofWriter pofWriter) throws IOException {
if(address != null) pofWriter.writeString(1, address);
if(homePhone != null) pofWriter.writeString(2, homePhone);
if(workPhone != null) pofWriter.writeString(3, workPhone);
if(cellPhone != null) pofWriter.writeString(4, cellPhone);
}
@Override
public String toString() {
return "["
+ "address = " + address
+ " homePhone = " + homePhone
+ " workPhone = " + workPhone
+ " cellPhone = " + cellPhone
+ "]";
}
}
제임스 TO
nt JQPL
쿼리 쿼리 = em.createQuery ("SELECT e.conInfo FROM Employee e where e.employId < 3");
근무했습니다.
고마워요! 방금 2.5 야간 빌드를 다운로드하면 작동하지만 예외는 사라졌습니다. 나는 그 코드 변화를 추적 할 것이다. 우리는 여전히 우리 제품에 EclpseLink2.1.2를 적용하고 있습니다. 그리고 나는 예외를 팝업하는 최신 릴리스 v2.4.1로만 테스트했습니다. – DonkeyRider