[jboss-user] [JBoss Seam] - Cannot instantitate @Embeddable attribute

[infoherlinsys]

Dear Partners.

The following xhtml piece references two attributes of an Entity-EJB. 
The first one works fine. The second one is an @Embeddable attribute but it throws an exception: "Cannot instantiate MonetaryAmount"

Something is wrong.

Attached is the related code.

You advice is appreciated.

Thank you.

Roger Mori.



0)0)0)0)0) XHTML page


  
    DOB
    
      <s:decorate>
        <h:inputText value="#{person.dateOfBirth}"/>
      </s:decorate>
    

  

  
    Annual Income
    
      <s:decorate>
        <h:inputText value="#{person.annualIncome.value}"/>
      </s:decorate>
    

  

1)1)1)1)1) Action Bean

[...]
@Stateful
@Name("personManager")
public class PersonAction implements PersonManager {
  @In (required=false) @Out (required=false)
  private Person person;
  

  @PersistenceContext (type=EXTENDED)
  private EntityManager em;

  // @RequestParameter
  Long pid;
 
  public String sayHello () {
    em.persist (person);
    return "persons";
  }

  @DataModel
  private List  fans;

  @DataModelSelection
  private Person selectedFan;

  @Factory("persons")
  public void findFans () {
    System.out.println("Find called");
    fans = em.createQuery("select p from Person p")
                                  .getResultList();
  }

  public void setPid (Long pid) {
    this.pid = pid;
    
    if (pid != null) {
      person = (Person) em.find(Person.class, pid);
    } else {
      person = new Person ();
    }
  }
  
  public Long getPid () {
    return pid;
  }

  public String delete () {
    Person toDelete = em.merge (selectedFan);
    em.remove( toDelete );
    findFans ();
    return null;
  }

  public String update () {
    return "persons";
  }

  @Remove @Destroy
  public void destroy() {}

}

2)2)2)2)2) Entity Bean
[....]
public class Person extends Party {
    private Date dateOfBirth ;
    [...]
    private MonetaryAmount annualIncome;
    [...]
    @Embedded
    @AttributeOverrides ( {
          @AttributeOverride(
             name = "value",
             column = @Column (name = "ANNUAL_INCOME") 
          ),
          @AttributeOverride(
            name = "currency",
            column = @Column (name = "ANUAL_INCOME_CURRENCY", length = 16 )
          )
     }
    )
    public MonetaryAmount getAnnualIncome() {
    	return  annualIncome; 	
    }	
    public void setAnnualIncome(MonetaryAmount annualIncome) {
    	  this.annualIncome = annualIncome;
    }	
    
    [...]
}

2)2)2)2) Embeddable Attribute
package com.dpn.model.common;
import java.io.Serializable;
import java.text.NumberFormat;
import java.util.*;
import javax.persistence.*;
@Embeddable 
public class MonetaryAmount implements Serializable {
       //Attributes
       private  Currency currency;
       private  BigDecimal value;
        
       //Constructor
       MonetaryAmount(){}
       public MonetaryAmount(BigDecimal value, Currency currency) {
		this.value = value;
		this.currency = currency;
	}
        
        public MonetaryAmount(BigDecimal value) {
                this.value = value;
                this.currency = Currency.getInstance(Locale.getDefault());
        }
        
        //Accessor Methods
        @Column (name = "CURRENCY", length = 16, nullable = false)
	public Currency getCurrency() {
		return currency;
	}
        public void setCurrency(Currency currency) {
            this.currency = currency;
        }

        @Column (name = "VALUE", nullable = false )
	public BigDecimal getValue() {
            return value;
	}
        
        public void setValue(BigDecimal value) {
            this.value = value;
        }
        

	// Common Methods
	public boolean equals(Object o) {
		if (this == o) return true;
		if (!(o instanceof MonetaryAmount)) return false;

		final MonetaryAmount monetaryAmount = (MonetaryAmount) o;

		if (!currency.equals(monetaryAmount.currency)) return false;
		if (!value.equals(monetaryAmount.value)) return false;

		return true;
	}

	public int hashCode() {
		int result;
		result = value.hashCode();
		result = 29 * result + currency.hashCode();
		return result;
	}

	public String toString() {
		return "Value: '" + getValue() + "', " +
		        "Currency: '" + getCurrency() + "'";
	}

	public int compareTo(Object o) {
		if (o instanceof MonetaryAmount) {
            // TODO: This requires some conversion magic and is therefore not implemented
			return this.getValue().compareTo(((MonetaryAmount) o).getValue());
		}
		return 0;
	}
    
}




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