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 Post subject: Retrieving Parent Object With NamedNativeQuery
PostPosted: Fri Jun 01, 2007 3:45 pm 
Newbie

Joined: Tue Jul 26, 2005 10:25 am
Posts: 12
I have a class, Task. I need to retrieve all tasks for a given Keyword. However, due to some database schema issues, I have to do this as a SQL query.

I have mapped everything in a @SqlResultSetMapping except for attribute that contains the parent object. I've declared a @ManyToOne relationship for the object to its parent. However, I don't know how to map that one field in the @SqlResultSetMapping.

Here's the class (I've only just started using annotations, so feel free to note if something else looks out of place):

Code:
package org.igprsweb.model;

import javax.persistence.*;
import java.sql.Date;

/**
* Model object for an inspected task
*
* @author Jason Ferguson
*/

@Entity
@Table(name="TASK")

// TODO: Map task parent
@SqlResultSetMapping(name="explicit", entities=@EntityResult(entityClass=Task.class, fields = {
        @FieldResult(name="taskId", column="TSK_ID"),
        @FieldResult(name="taskNum", column="TSK_NUM"),
        @FieldResult(name="taskName", column="TSK_NAME"),
        @FieldResult(name="taskShortTitle", column="SHRT_TITLE"),
        @FieldResult(name="taskParent", column=""),
        @FieldResult(name="taskIsEssential", column="IS_ESSEN"),
        @FieldResult(name="taskActivationDate", column="ACT_DATE"),
        @FieldResult(name="taskInactivationDate", column="INACT_DATE")
        }))
@NamedNativeQuery(name="getTasksByKeyword",
        query="SELECT * FROM TASK WHERE TASK.TASK_ID=EOUT_STANDARD.TSK_ID AND EOUT_STANDARD.KEYWORD=:key",
        resultSetMapping = "explicit")
public class Task {

    private int taskId;
    private String taskNum;
    private String taskName;
    private String taskDesc;
    private String taskShortTitle;
    private Task taskParent;
    private boolean taskIsEssential;
    private Date taskActivationDate;
    private Date taskInactivationDate;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name="TSK_ID")
    public int getTaskId() {
        return taskId;
    }

    public void setTaskId(int taskId) {
        this.taskId = taskId;
    }

    @Column(name="TSK_NUM")
    public String getTaskNum() {
        return taskNum;
    }

    public void setTaskNum(String taskNum) {
        this.taskNum = taskNum;
    }

    @Column(name="TSK_NAME")
    public String getTaskName() {
        return taskName;
    }

    public void setTaskName(String taskName) {
        this.taskName = taskName;
    }

    @Column(name="TSK_DESC")
    public String getTaskDesc() {
        return taskDesc;
    }

    public void setTaskDesc(String taskDesc) {
        this.taskDesc = taskDesc;
    }

    @Column(name="SHRT_TITLE")
    public String getTaskShortTitle() {
        return taskShortTitle;
    }

    public void setTaskShortTitle(String taskShortTitle) {
        this.taskShortTitle = taskShortTitle;
    }

    // TODO: Map Parent Task
    @ManyToOne
    @JoinColumn(name="PAR_ORG_ID")
    public Task getTaskParent() {
        return taskParent;
    }

    public void setTaskParent(Task taskParent) {
        this.taskParent = taskParent;
    }

    @Column(name="IS_ESSEN")
    // TODO: Fix taskIsEssential
    public boolean isTaskIsEssential() {
        return taskIsEssential;
    }

    public void setTaskIsEssential(boolean taskIsEssential) {
        this.taskIsEssential = taskIsEssential;
    }

    @Column(name="ACT_DATE")
    public Date getTaskActivationDate() {
        return taskActivationDate;
    }

    public void setTaskActivationDate(Date taskActivationDate) {
        this.taskActivationDate = taskActivationDate;
    }

    @Column(name="INACT_DATE")
    public Date getTaskInactivationDate() {
        return taskInactivationDate;
    }

    public void setTaskInactivationDate(Date taskInactivationDate) {
        this.taskInactivationDate = taskInactivationDate;
    }


    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        final Task task = (Task) o;

        if (taskId != task.taskId) return false;

        return true;
    }

    public int hashCode() {
        return taskId;
    }
}
[/code]


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