Item.java

package org.hibernate.test.annotations.derivedidentities.e1.b2;
import java.io.Serializable;
import java.math.BigDecimal;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Version;



   @NamedQueries( {
      @NamedQuery(name = "Item.findByCategory", 
          query = "SELECT i FROM Item i WHERE i.category=:category ORDER BY i.id")})
  @SuppressWarnings("serial")
  @Entity
  @Table(name = "O_ITEM")
  public class Item implements Serializable 
  {

    public static final String QUERY_BY_CATEGORY = "Item.findByCategory";

    @Id
    @Column(name = "I_ID")
    private String id;

    @Column(name = "I_NAME")
    private String name;

    @Column(name = "I_PRICE")
    private BigDecimal price;

    @Column(name = "I_DESC")
    private String description;

    @Column(name = "I_DISCOUNT")
    private BigDecimal discount;

    @Column(name = "I_CATEGORY")
    private int category;

    @Version
    @Column(name = "I_VERSION")
    int version;
    
    public String getId() {
       return id;
     }

     public void setId(String i) {
       id = i;
     }
    
    public int getCategory() {
       return category;
     }

     public void setCategory(int category) {
       this.category = category;
     }

     public String getDescription() {
       return description;
     }

     public void setDescription(String description) {
       this.description = description;
     }

     public BigDecimal getDiscount() {
       return discount;
     }

     public void setDiscount(BigDecimal discount) {
       if (discount.doubleValue() < 0 || discount.doubleValue() > 100.0)
         throw new IllegalArgumentException(this + " discount " + discount
             + " is invalid. Must be between 0.0 and 100.0");
       this.discount = discount;
     }

     public String getName() {
       return name;
     }

     public void setName(String name) {
       this.name = name;
     }

     public BigDecimal getPrice() {
       return price;
     }

     public void setPrice(BigDecimal price) {
       this.price = price;
     }

     public int getVersion() {
       return version;
     }
     
     @Override
     public boolean equals(Object other) {
       if (other == null || other.getClass() != this.getClass()) {
         return false;
       }
       if (other == this) {
         return true;
       }
       return id.equals(((Item) other).id);
     }

     @Override
     public int hashCode() {
       return id.hashCode();
     }
}