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;
}

}