How to use

isUnsettable

method

in

org.eclipse.emf.ecore.EStructuralFeature

private boolean useUnsetBit(EStructuralFeature feature) {
  // TODO non-unsettable boolean values can also be stored in these bits
  Object value = eGet(feature);
  if (feature.isUnsettable()) {
    if (!eIsSet(feature)) {
      return true;
    }
  } else {
    if (feature.isMany() && (value == null || ((List<?>)value).isEmpty())) {
      return true;
    }
    if (feature.getDefaultValue() == value || (feature.getDefaultValue() != null && feature.getDefaultValue().equals(value))) {
      return true;
    }
  }
  return false;
}

private boolean useUnsetBit(EStructuralFeature feature, IdEObject object) {
  // TODO non-unsettable boolean values can also be stored in these bits
  Object value = object.eGet(feature);
  if (feature.isUnsettable()) {
    if (!object.eIsSet(feature)) {
      return true;
    }
    if (feature.isMany() && ((List<?>)value).isEmpty()) {
      return true;
    }
  } else {
    if (feature.isMany() && ((List<?>)value).isEmpty()) {
      return true;
    }
    if (feature.getDefaultValue() == value || (feature.getDefaultValue() != null && feature.getDefaultValue().equals(value))) {
      return true;
    }
  }
  return false;
}

private boolean useUnsetBit(EStructuralFeature feature) {
  // TODO non-unsettable boolean values can also be stored in these bits
  if (feature.isUnsettable()) {
    return true;
  } else {
    if (feature.isMany()) {
      return true;
    }
    if (feature.getDefaultValue() == null || (feature.getDefaultValue() != null && feature.getDefaultValue() == null)) {
      return true;
    }
  }
  return false;
}
 

protected EStructuralFeature.Internal.SettingDelegate eSettingDelegate(EStructuralFeature eFeature) {
  SettingDelegate eSettingDelegate = super.eSettingDelegate(eFeature);
  if (useInverses) {
    return eSettingDelegate;
  }
  if (eFeature instanceof EReference && ((EReference)eFeature).getEOpposite() != null) {
    // TODO cache/pre-generate the objects created in this block
    if (eFeature.isMany()) {
      if (eFeature.isUnsettable()) {
        return new InternalSettingDelegateMany(InternalSettingDelegateMany.EOBJECT_UNSETTABLE, eFeature);
      } else {
        return new InternalSettingDelegateMany(InternalSettingDelegateMany.EOBJECT, eFeature);
      }
    } else {
      if (eFeature.isUnsettable()) {
        return new InternalSettingDelegateSingleEObjectUnsettable((EClass) eFeature.getEType(), eFeature);
      } else {
        return new InternalSettingDelegateSingleEObject((EClass) eFeature.getEType(), eFeature);
      }
    }
  } else {
    return eSettingDelegate;
  }
}

boolean isUnsetted = (unsetted[fieldCounter / 8] & (1 << (fieldCounter % 8))) != 0;
if (isUnsetted) {
  if (feature.isUnsettable()) {
    idEObject.eUnset(feature);
  } else if (feature.isMany()) {

boolean isUnsetted = (unsetted[fieldCounter / 8] & (1 << (fieldCounter % 8))) != 0;
if (isUnsetted) {
  if (feature.isUnsettable()) {
    idEObject.eUnset(feature);
  } else if (feature.isMany()) {

 @Override
 protected boolean isFeatureUnsettable()
 {
  Object feature = getFeature();
  if (feature instanceof EStructuralFeature)
  {
   return ((EStructuralFeature)feature).isUnsettable();
  }
  return false;
 }
}

for (EStructuralFeature feature : eClass.getEAllStructuralFeatures()) {
  String jsonKey = JsonMetadata.getJsonFieldName(feature);
  if (feature.isUnsettable() && !eObj.eIsSet(feature)) {
    continue;

 @Override
 protected boolean isFeatureUnsettable()
 {
  Object feature = getFeature();
  if (feature instanceof EStructuralFeature)
  {
   return ((EStructuralFeature)feature).isUnsettable();
  }
  return false;
 }
}

protected boolean shouldUnset(EStructuralFeature feature, Object value)
{
 if (feature.getUpperBound() != ETypedElement.UNSPECIFIED_MULTIPLICITY && !feature.isUnsettable())
 {
  Object defaultValue = feature.getDefaultValue();
  return defaultValue == null ? value == null : defaultValue.equals(value);
 }
 else
 {
  return false;
 }
}

protected boolean shouldUnset(EStructuralFeature feature, Object value)
{
 if (feature.getUpperBound() != ETypedElement.UNSPECIFIED_MULTIPLICITY && !feature.isUnsettable())
 {
  Object defaultValue = feature.getDefaultValue();
  return defaultValue == null ? value == null : defaultValue.equals(value);
 }
 else
 {
  return false;
 }
}

@Override
protected Object getResultSetValue(ResultSet resultSet) throws SQLException
{
 String val = resultSet.getString(getField().getName());
 if (resultSet.wasNull())
 {
  return getFeature().isUnsettable() ? CDORevisionData.NIL : null;
 }
 return new BigInteger(val);
}

@Override
protected Object getResultSetValue(ResultSet resultSet) throws SQLException
{
 String val = resultSet.getString(getField().getName());
 if (resultSet.wasNull())
 {
  return getFeature().isUnsettable() ? CDORevisionData.NIL : null;
 }
 return val;
}

 @Override
 public int size()
 {
  return eStructuralFeature.isUnsettable() ? eObject.eIsSet(eStructuralFeature) ? 1 : 0 : eObject.eGet(eStructuralFeature, false) == null ? 0 : 1;
 }
};

 @Override
 public int size()
 {
  return eStructuralFeature.isUnsettable() ? eObject.eIsSet(eStructuralFeature) ? 1 : 0 : eObject.eGet(eStructuralFeature, false) == null ? 0 : 1;
 }
};

public void visit(CDOUnsetFeatureDelta delta)
{
 if (delta.getFeature().isUnsettable())
 {
  throw new ImplementationError("Should not be called"); //$NON-NLS-1$
 }
 clearList(accessor, id);
}

@Override
protected int featureKind(EStructuralFeature f) {
  return !f.isTransient()
    && ((EStructuralFeature.Internal) f).isContainer()
    ? (f.isUnsettable()
      ? OBJECT_HREF_SINGLE_UNSETTABLE
      : OBJECT_HREF_SINGLE)
    : ((f == UMLPackage.Literals.CONNECTABLE_ELEMENT__END
      || f == UMLPackage.Literals.VERTEX__INCOMING || f == UMLPackage.Literals.VERTEX__OUTGOING)
      ? OBJECT_HREF_MANY
      : super.featureKind(f));
}

public boolean isUnsettable()
{
 if (getGenModel().isSuppressUnsettable())
 {
  return false;
 }
 else
 {
  EStructuralFeature eStructuralFeature = getEcoreFeature();
  return eStructuralFeature.isUnsettable() && !isContainer();
 }
}

public void visit(CDOUnsetFeatureDelta delta)
{
 if (delta.getFeature().isUnsettable())
 {
  throw new ImplementationError("Should not be called"); //$NON-NLS-1$
 }
 if (TRACER.isEnabled())
 {
  TRACER.format("Delta Unsetting"); //$NON-NLS-1$
 }
 clearList(accessor, id, oldVersion, newVersion);
 lastIndex = -1;
}

@Override
public Object getResultSetValue(ResultSet resultSet) throws SQLException
{
 IIDHandler idHandler = getMappingStrategy().getStore().getIDHandler();
 CDOID id = idHandler.getCDOID(resultSet, getField().getName());
 if (id == null && getFeature().isUnsettable())
 {
  return CDORevisionData.NIL;
 }
 return id;
}