Re: RPC error in JPA (toplink)

[Saeed Zarinfam]

this is my entity class.

import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;

/**
 *
 * @author Saeed Zarinfam
 */
@Entity
@Table(name = "ole_exam")
@NamedQueries({...@namedquery(name = "Exam.findAll", query = "SELECT e
FROM Exam e"), @NamedQuery(name = "Exam.findByExamId", query = "SELECT
e FROM Exam e WHERE e.examId = :examId"), @NamedQuery(name =
"Exam.findByExamName", query = "SELECT e FROM Exam e WHERE e.examName
= :examName"), @NamedQuery(name = "Exam.findByExamDesc", query =
"SELECT e FROM Exam e WHERE e.examDesc = :examDesc"), @NamedQuery(name
= "Exam.findByExamTime", query = "SELECT e FROM Exam e WHERE
e.examTime = :examTime"), @NamedQuery(name =
"Exam.findByExamQuestionCount", query = "SELECT e FROM Exam e WHERE
e.examQuestionCount = :examQuestionCount"), @NamedQuery(name =
"Exam.findByExamMinMark", query = "SELECT e FROM Exam e WHERE
e.examMinMark = :examMinMark")})
public class Exam implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "exam_id")
    private Long examId;
    @Basic(optional = false)
    @Column(name = "exam_name")
    private String examName;
    @Column(name = "exam_desc")
    private String examDesc;
    @Basic(optional = false)
    @Column(name = "exam_time")
    private short examTime;
    @Basic(optional = false)
    @Column(name = "exam_question_count")
    private short examQuestionCount;
    @Basic(optional = false)
    @Column(name = "exam_min_mark")
    private int examMinMark;
    @JoinColumn(name = "exam_template_fk", referencedColumnName =
"exam_template_id")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    private ExamTemplate examTemplateFk;

    public Exam() {
    }

    public Exam(Long examId) {
        this.examId = examId;
    }

    public Exam( String examName, short examTime, short
examQuestionCount, int examMinMark) {
        this.examName = examName;
        this.examTime = examTime;
        this.examQuestionCount = examQuestionCount;
        this.examMinMark = examMinMark;
    }

    public Long getExamId() {
        return examId;
    }

    public void setExamId(Long examId) {
        this.examId = examId;
    }

    public String getExamName() {
        return examName;
    }

    public void setExamName(String examName) {
        this.examName = examName;
    }

    public String getExamDesc() {
        return examDesc;
    }

    public void setExamDesc(String examDesc) {
        this.examDesc = examDesc;
    }

    public short getExamTime() {
        return examTime;
    }

    public void setExamTime(short examTime) {
        this.examTime = examTime;
    }

    public short getExamQuestionCount() {
        return examQuestionCount;
    }

    public void setExamQuestionCount(short examQuestionCount) {
        this.examQuestionCount = examQuestionCount;
    }

    public int getExamMinMark() {
        return examMinMark;
    }

    public void setExamMinMark(int examMinMark) {
        this.examMinMark = examMinMark;
    }

    public ExamTemplate getExamTemplateFk() {
        return examTemplateFk;
    }

    public void setExamTemplateFk(ExamTemplate examTemplateFk) {
        this.examTemplateFk = examTemplateFk;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (examId != null ? examId.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id
fields are not set
        if (!(object instanceof Exam)) {
            return false;
        }
        Exam other = (Exam) object;
        if ((this.examId == null && other.examId != null) ||
(this.examId != null && !this.examId.equals(other.examId))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "entity.Exam[examId=" + examId + "]";
    }

}

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