How to use javax.jdo.annotations

/**
 * Polymorphic association to the object providing the paperclipAttachedTo.
 *
 * NB: strictly speaking these should be abstract; this is a workaround (see ISIS-582)
 */
@NotPersistent
public Object getAttachedTo() { return null; }
protected void setAttachedTo(Object object) {}

@Column
public int getPrimitiveWithNoAllowsNull() {
  return primitiveWithNoAllowsNull;
}
public void setPrimitiveWithNoAllowsNull(int primitive) {

@EmbeddedOnly
public class SimpleObjectWithEmbeddedOnly {

  private Long id;

  @PrimaryKey
  public Long getId() {
    return id;
  }

  public void setId(final Long id) {
    this.id = id;
  }
}

@Column(allowsNull="false")
public int getPrimitiveWithAllowsNullFalse() {
  return primitiveWithAllowsNullFalse;
}
public void setPrimitiveWithAllowsNullFalse(int primitive) {

/**
 * Polymorphic association to the object providing the paperclipAttachedTo.
 *
 * NB: strictly speaking these should be abstract; this is a workaround (see ISIS-582)
 */
@NotPersistent
public Object getAttachedTo() { return null; }
protected void setAttachedTo(Object object) {}

@Column
public int getPrimitiveWithNoAllowsNull() {
  return primitiveWithNoAllowsNull;
}
public void setPrimitiveWithNoAllowsNull(int primitive) {

@Column(allowsNull="false")
public String getReferenceWithAllowsNullFalse() {
  return referenceWithAllowsNullFalse;
}
public void setReferenceWithAllowsNullFalse(String referenceWithAllowsNullFalse) {

@Column
public int getPrimitiveWithNoAllowsNull() {
  return primitiveWithNoAllowsNull;
}
public void setPrimitiveWithNoAllowsNull(int primitive) {

@Column
public String getReferenceWithNoAllowsNull() {
  return referenceWithNoAllowsNull;
}
public void setReferenceWithNoAllowsNull(String reference) {

@Column(allowsNull="true")
public int getPrimitiveWithAllowsNullTrue() {
  return primitiveWithAllowsNullTrue;
}
public void setPrimitiveWithAllowsNullTrue(int primitive) {

@Column
public int getPrimitiveWithNoAllowsNull() {
  return primitiveWithNoAllowsNull;
}
public void setPrimitiveWithNoAllowsNull(int primitive) {

@Column
public String getReferenceWithNoAllowsNull() {
  return referenceWithNoAllowsNull;
}
public void setReferenceWithNoAllowsNull(String reference) {

@Column(allowsNull="true")
public String getReferenceWithAllowsNullTrue() {
  return referenceWithAllowsNullTrue;
}
public void setReferenceWithAllowsNullTrue(String referenceWithAllowsNullTrue) {

@Column
public String getReferenceWithNoAllowsNull() {
  return referenceWithNoAllowsNull;
}
public void setReferenceWithNoAllowsNull(String reference) {

@Column(allowsNull="true")
public String getReferenceWithAllowsNullTrue() {
  return referenceWithAllowsNullTrue;
}
public void setReferenceWithAllowsNullTrue(String referenceWithAllowsNullTrue) {

@Column(allowsNull="false")
public String getReferenceWithAllowsNullFalse() {
  return referenceWithAllowsNullFalse;
}
public void setReferenceWithAllowsNullFalse(String referenceWithAllowsNullFalse) {

@Column(allowsNull="false")
public int getPrimitiveWithAllowsNullFalse() {
  return primitiveWithAllowsNullFalse;
}
public void setPrimitiveWithAllowsNullFalse(int primitive) {

@Column(allowsNull="true")
public int getPrimitiveWithAllowsNullTrue() {
  return primitiveWithAllowsNullTrue;
}
public void setPrimitiveWithAllowsNullTrue(int primitive) {

@Column(allowsNull="false")
public String getReferenceWithAllowsNullFalse() {
  return referenceWithAllowsNullFalse;
}
public void setReferenceWithAllowsNullFalse(String referenceWithAllowsNullFalse) {

@Column(allowsNull="true")
public int getPrimitiveWithAllowsNullTrue() {
  return primitiveWithAllowsNullTrue;
}
public void setPrimitiveWithAllowsNullTrue(int primitive) {