Many-to-one relationship using annotations in hibernates...

Question

my pojo class is M_Product_Category
package com.netree.model;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.OneToMany;
import javax.persistence.JoinColumn;
@Entity
@Table(name="m_product_category")
public class M_Product_Category implements Serializable{
     @Id
     @Column(name="MPC_ID")
     @GeneratedValue
     private int mpc_Id;
     @Column(name="IsActive")
     private int isActive;
     @Column(name="Category_Name")
     private String category_Name;
     @Column(name="Category_Description")
     private String category_Description;
     @Column(name="Parent_MPC_ID")
     private int parent_MPC_ID;
     public M_Product_Category(){
     public M_Product_Category(int mpc_Id, int isActive, String category_Name,
               String category_Description, int parent_MPC_ID) {
          super();
          this.mpc_Id = mpc_Id;
          this.isActive = isActive;
          this.category_Name = category_Name;
          this.category_Description = category_Description;
          this.parent_MPC_ID = parent_MPC_ID;
     public int getMpc_Id() {
          return mpc_Id;
     public void setMpc_Id(int mpc_Id) {
          this.mpc_Id = mpc_Id;
     public int getIsActive() {
          return isActive;
     public void setIsActive(int isActive) {
          this.isActive = isActive;
     public String getCategory_Name() {
          return category_Name;
     public void setCategory_Name(String category_Name) {
          this.category_Name = category_Name;
     public String getCategory_Description() {
          return category_Description;
     public void setCategory_Description(String category_Description) {
          this.category_Description = category_Description;
     @OneToMany(cascade=CascadeType.ALL)
     @JoinColumn(name="Parent_MPC_ID", referencedColumnName="MPC_ID")
     public int getParent_MPC_ID() {
          return parent_MPC_ID;
     public void setParent_MPC_ID(int parent_MPC_ID) {
          this.parent_MPC_ID = parent_MPC_ID;
This is anothe pojo class i.e., ProductMaster:
package com.netree.model;
import java.io.Serializable;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "M_Product_Master")
public class ProductMaster implements Serializable {
     @Id
     @GeneratedValue
     @Column(name = "MPM_ID")
     private int mpmID;
     @Column(name = "Product_Name")
     private String productName;
     @Column(name = "Product_Description")
     private String productDescription;
     @Column(name = "Standard_Cost")
     private String price;
     @Column(name = "Image_URL_Big")
     private String image;
     @Column(name = "MPC_ID")
     private int mpc_id;
     public int getMpc_id() {
          return mpc_id;
     public void setMpc_id(int mpc_id) {
          this.mpc_id = mpc_id;
     private M_Product_Category product_Category;
     @ManyToOne(cascade = CascadeType.ALL)
     @JoinColumn(name = "mpc_id", referencedColumnName = "MPC_ID")
     public M_Product_Category getProduct_Category() {
          return product_Category;
     public void setProduct_Category(M_Product_Category product_Category) {
          this.product_Category = product_Category;
     public int getMpmID() {
          return mpmID;
     public void setMpmID(int mpmID) {
          this.mpmID = mpmID;
     public String getProductName() {
          return productName;
     public void setProductName(String productName) {
          this.productName = productName;
     public String getProductDescription() {
          return productDescription;
     public void setProductDescription(String productDescription) {
          this.productDescription = productDescription;
     public String getPrice() {
          return price;
     public void setPrice(String price) {
          this.price = price;
     public String getImage() {
          return image;
     public void setImage(String image) {
          this.image = image;
util class...
package com.netree.Util;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
public class HibernateUtil {
     public static SessionFactory getSessionFactory() {
          System.out.println("sessionFactory");
          AnnotationConfiguration annotationConfiguration = new AnnotationConfiguration();
          System.out.println("annotationConfiguration");
          annotationConfiguration=annotationConfiguration.configure("com/netree/Cfg/Hibernate.cfg.xml");
          SessionFactory sessionFactory = annotationConfiguration.buildSessionFactory();
          return sessionFactory;
package com.netree.DaoImpl;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;
import com.netree.Util.HibernateUtil;
import com.netree.model.ProductMaster;
public class ProductMasterImpl {
public static void main(String args[]) {
                         try{
                              System.out.println("sessionFactory starts");
          SessionFactory sessionFactory=HibernateUtil.getSessionFactory();
          System.out.println("sessionFactory ends");
          Session session=sessionFactory.getCurrentSession();
                              Transaction transaction=session.beginTransaction();
     Criteria ctr=session.createCriteria(ProductMaster.class).add(Restrictions.eq("mpc_id",new Integer(39)));
     List<ProductMaster> list=ctr.list();
               @SuppressWarnings("rawtypes")
                              Iterator iterator = list.iterator();
               while (iterator.hasNext()) {
                    ProductMaster productMaster = (ProductMaster) iterator.next();
System.out.println(productMaster.getMpmID());
System.out.println(productMaster.getProductName());
System.out.println(productMaster.getProductDescription());
System.out.println(productMaster.getPrice());
System.out.println(productMaster.getImage());
System.out.println(productMaster.getProduct_Category().getMpc_Id());
System.out.println(productMaster.getProduct_Category().getCategoryName());
System.out.println(productMaster.getProduct_Category().getCategory_Description());
               session.close();
     catch(Exception ex){
     System.out.println(ex.getMessage());
                    finally{
Already i have two tables in database with the suitable records... I want to retrieve the data by using MPC_ID from both tables....
when i run this program i am getting query but it is showing exception i.e....
Hibernate: select this_.MPM_ID as MPM1_1_0_, this_.Image_URL_Big as Image2_1_0_, this_.MPC_ID as MPC3_1_0_, this_.Standard_Cost as Standard4_1_0_, this_.Product_Description as Product5_1_0_, this_.Product_Name as Product6_1_0_, this_.product_Category as product7_1_0_ from M_Product_Master this_ where this_.MPC_ID=?
could not execute query
could u pls help me in this regard.....

Answer 1

in the cube do you have both of these values
PT02 211886
PT02 211887
or its always either one of them. I dont think changing your cube design would prove any helpful in this scenario. I believe its more of a data issue than the design issue. You would need to change the way the data is entered into the cube with the different measurement assigned to the unit.
on a second thought(I understand that you dont have a luxury to change the cube design),  when you say you can see diff measurement type assigned to one unit in the masterdata, you can make the unit attribute as a navigational attribute in both the IO and cube. And just map measurent type in the update rules and derive the units from the masterdata table in the report.... does it make sense?
Message was edited by:
        voodi