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Old July 25th, 2008, 01:11 PM
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Default Persisting Simple Association

Hi Guys,

I have two tables stock and bar, I want to associate a bar to every stock. I have a Bar class:

public class Bar {

    private int barID;
    private String barName;
    private Address address;
    private Set stocks = new HashSet();

    public Set getStocks() {
        return stocks;
    }
    public void setStocks(Set stocks) {
        this.stocks = stocks;
    }
    public Address getAddress() {
        return address;
    }
    public void setAddress(Address address) {
        this.address = address;
    }
    public int getBarID() {
        return barID;
    }
    public void setBarID(int barID) {
        this.barID = barID;
    }
    public String getBarName() {
        return barName;
    }
    public void setBarName(String barName) {
        this.barName = barName;
    }
    public void addBar(Stock stock){
        stock.setBar(this);
        this.getStocks().add(stock);
    }
}

and a bar descriptor:

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE hibernate-mapping PUBLIC
  "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

  <hibernate-mapping>
        <class name="com.venture.hibernate.Bar" table="bar" >
          <id name="barID" type="java.lang.Integer" column="barID" >
                <generator class="increment" />
          </id>
          <property name="barName" type="string">
              <column name="bar_name" length="20"/>
          </property>

          <set name="stocks" inverse="true">
              <key column="barID"></key>
              <one-to-many class="com.venture.hibernate.Stock"/>
          </set>
      </class>
  </hibernate-mapping>



and a stock class:

public class Stock {

    private int stockID;
    private int productID;
    private int quantity;
    private Set stock = new HashSet();
    private Bar bar = new Bar();
    private Product product = new Product();
    private Date date;
    private String userName;

    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public Date getDate() {
        return date;
    }
    public void setDate(Date date) {
        this.date = date;
    }
    public int getProductID() {
        return productID;
    }
    public void setProductID(int productID) {
        this.productID = productID;
    }
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
    public int getStockID() {
        return stockID;
    }
    public void setStockID(int stockID) {
        this.stockID = stockID;
    }
    public int getQuantity() {
        return quantity;
    }
    public Bar getBar() {
        return bar;
    }
    public void setBar(Bar bar) {
        this.bar = bar;
    }
    public Product getProduct() {
        return product;
    }
    public void setProduct(Product product) {
        this.product = product;
    }
    public Set getStock() {
        return stock;
    }
    public void setStock(Set stock) {
        this.stock = stock;
    }

}

and a stock descriptor:

<?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE hibernate-mapping PUBLIC
  "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
  "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

  <hibernate-mapping>
        <class name="com.venture.hibernate.Stock" table="inventory" >
          <id name="stockID" type="java.lang.Integer" column="inventoryID" >
                <generator class="increment" />
          </id>
          <property name="product" type="string" length="20">
                <column name="productid"></column>
          </property>
          <property name="quantity" type="integer">
                <column name="quantity"></column>
          </property>

          <many-to-one name="bar"
                          column="barID"
                          class="com.venture.hibernate.Bar"
                          />
      </class>
  </hibernate-mapping>

I try to persist a stock item adding the folowing:

public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("Started");
        SQLImpl sqlImpl = new SQLImpl();
        Bar bar = new Bar();
        bar.setBarName("Hello");

        Stock stock = new Stock();
        bar.addBar(stock);
        stock.setQuantity(10);
        stock.setBar(bar);
        stock.setUserName("Adnan");
        sqlImpl.insertStockDetails(stock);
        System.out.println("Finished");
    }

but I get the following error:

Exception in thread "main" org.hibernate.TransientObjectException: com.venture.hibernate.Bar

I have no idea why, could someone please point me in the right direction?

Regards

Ads


Adz - Learning The J2EE Ways.
__________________
Adz - Learning The J2EE Ways.
 
Old August 13th, 2008, 03:49 AM
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Join Date: Mar 2007
Posts: 373
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Thanked 1 Time in 1 Post
Default

I think you can solve it by following the info. given in the bellow link

http://parasjain01.wordpress.com/200...ion-revisited/

- Rakesh





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