javax.persistence.GeneratorType cannot be resolved

[ataud]

I install JBossIDE-1.6.0.GA-Bundle-win32 and jboss-4.0.4.GA

I create a new EJB3 project

I create the folowing EntityBean :

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import java.io.Serializable;
import java.util.Collection;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratorType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name = "COUNTRY")
public class CountryEntity implements Serializable {

int numCountry;
String labelCountry;
String code2Country;
String code3Country;
private Collection persons;

@Id( generate = GeneratorType.AUTO)
@Column (name = "NUM_COUNTRY")
public int getNumCountry() {
return numCountry;
}

public void setNumCountry(int numCountry) {
this.numCountry = numCountry;
}

@Column (name = "LABEL_COUNTRY")
public String getLabelCountry() {
return labelCountry;
}

public void setLabelCountry(String labelCountry) {
this.labelCountry = labelCountry;
}

@Column (name = "CODE2_COUNTRY")
public String getCode2Country() {
return code2Country;
}

public void setCode2Country(String code2Country) {
this.code2Country = code2Country;
}

@Column (name = "CODE3_COUNTRY")
public String getCode3Country() {
return code2Country;
}

public void setCode3Country(String code3Country) {
this.code3Country = code3Country;
}

@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="country")
@JoinColumn(name="FK_COUNTRY") // Foreign key in PERSON
public Collection getPersons() {
return persons;
}

public void setPersons(Collection persons) {
this.persons = persons;
}
}
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But the Eclipse IDE do not reconise the class javax.persistence.GeneratorType

"The import javax.persistence.GeneratorType cannot be resolved"