How to use

isChangeable

method

in

org.eclipse.emf.ecore.EStructuralFeature

/**
 * Returns whether a value's single property is settable. By default, this returns whether the structural feature is
 * {@link org.eclipse.emf.ecore.EStructuralFeature#isChangeable changeable}. Subclasses may use this in creating a
 * property descriptor, and user subclasses may override it to restrict or allow setting of the property.
 */
protected boolean isPropertySettable()
{
 return feature.isChangeable();
}

public String getChangeableFlag()
{
 String result = !getEcoreFeature().isChangeable() ? "!" : "";
 return result + "IS_CHANGEABLE";
}

public String getChangeableFlag()
{
 String result = !getEcoreFeature().isChangeable() ? "!" : "";
 return result + "IS_CHANGEABLE";
}

public boolean isChangeable()
{
 return getEcoreFeature().isChangeable();
}

@Override
public Object getValue(EObject object, EStructuralFeature feature)
{
 if (feature == EcorePackage.Literals.ESTRUCTURAL_FEATURE__CHANGEABLE)
 {
  return ((EStructuralFeature)object).isChangeable() ? Boolean.FALSE : Boolean.TRUE; // EMOF.isReadOnly = !Ecore.changeable
 }
 else
 {
  return super.getValue(object, feature);
 }
}

/**
 * Returns whether the entry attribute is changeable.
 */
@Override
protected boolean isPropertySettable()
{
 return getEntryFeature().isChangeable();
}

@Override
public Object getValue(EObject object, EStructuralFeature feature)
{
 if (feature == EcorePackage.Literals.ESTRUCTURAL_FEATURE__CHANGEABLE)
 {
  return ((EStructuralFeature)object).isChangeable() ? Boolean.FALSE : Boolean.TRUE; // EMOF.isReadOnly = !Ecore.changeable
 }
 else
 {
  return super.getValue(object, feature);
 }
}

public boolean isChangeable()
{
 return getEcoreFeature().isChangeable();
}

@Override
protected Entry validate(int index, Entry object)
{
 if (modCount == 0) return object;
 Entry result = super.validate(index, object);
 EStructuralFeature eStructuralFeature = object.getEStructuralFeature();
 if (!eStructuralFeature.isChangeable() || !featureMapValidator.isValid(eStructuralFeature))
 {
  throw
   new RuntimeException
    ("Invalid entry feature '" + eStructuralFeature.getEContainingClass().getName() + "." + eStructuralFeature.getName() + "'");
 }
 return result;
}

@Override
protected Entry validate(int index, Entry object)
{
 if (modCount == 0) return object;
 Entry result = super.validate(index, object);
 EStructuralFeature eStructuralFeature = object.getEStructuralFeature();
 if (!eStructuralFeature.isChangeable() || !featureMapValidator.isValid(eStructuralFeature))
 {
  throw
   new RuntimeException
    ("Invalid entry feature '" + eStructuralFeature.getEContainingClass().getName() + "." + eStructuralFeature.getName() + "'");
 }
 return result;
}

@Override
protected Entry validate(int index, Entry object)
{
 if (modCount == 0) return object;
 Entry result = super.validate(index, object);
 EStructuralFeature eStructuralFeature = object.getEStructuralFeature();
 if (!eStructuralFeature.isChangeable() || !featureMapValidator.isValid(eStructuralFeature))
 {
  throw
   new RuntimeException
    ("Invalid entry feature '" + eStructuralFeature.getEContainingClass().getName() + "." + eStructuralFeature.getName() + "'");
 }
 return result;
}

@Override
protected Entry validate(int index, Entry object)
{
 if (modCount == 0) return object;
 Entry result = super.validate(index, object);
 EStructuralFeature eStructuralFeature = object.getEStructuralFeature();
 if (!eStructuralFeature.isChangeable() || !featureMapValidator.isValid(eStructuralFeature))
 {
  throw
   new RuntimeException
    ("Invalid entry feature '" + eStructuralFeature.getEContainingClass().getName() + "." + eStructuralFeature.getName() + "'");
 }
 return result;
}

protected void eDynamicUnset(int dynamicFeatureID, EStructuralFeature eFeature)
{
 if (dynamicFeatureID < 0)
 {
  eOpenUnset(eFeature);
 }
 else
 {
  if (!eFeature.isChangeable())
  {
   throw new IllegalArgumentException("The feature '" + eFeature.getName() + "' is not a valid changeable feature");
  }
  eSettingDelegate(eFeature).dynamicUnset(this, eSettings(), dynamicFeatureID);
 }
}

protected void eDynamicSet(int dynamicFeatureID, EStructuralFeature eFeature, Object newValue)
{
 if (dynamicFeatureID < 0)
 {
  eOpenSet(eFeature, newValue);
 }
 else
 {
  if (!eFeature.isChangeable())
  {
   throw new IllegalArgumentException("The feature '" + eFeature.getName() + "' is not a valid changeable feature");
  }
  eSettingDelegate(eFeature).dynamicSet(this, eSettings(), dynamicFeatureID, newValue);
 }
}

protected void eDynamicUnset(int dynamicFeatureID, EStructuralFeature eFeature)
{
 if (dynamicFeatureID < 0)
 {
  eOpenUnset(eFeature);
 }
 else
 {
  if (!eFeature.isChangeable())
  {
   throw new IllegalArgumentException("The feature '" + eFeature.getName() + "' is not a valid changeable feature");
  }
  eSettingDelegate(eFeature).dynamicUnset(this, eSettings(), dynamicFeatureID);
 }
}

protected void eDynamicSet(int dynamicFeatureID, EStructuralFeature eFeature, Object newValue)
{
 if (dynamicFeatureID < 0)
 {
  eOpenSet(eFeature, newValue);
 }
 else
 {
  if (!eFeature.isChangeable())
  {
   throw new IllegalArgumentException("The feature '" + eFeature.getName() + "' is not a valid changeable feature");
  }
  eSettingDelegate(eFeature).dynamicSet(this, eSettings(), dynamicFeatureID, newValue);
 }
}

public void eUnset(int featureID)
{
 EStructuralFeature eFeature = eClass().getEStructuralFeature(featureID);
 int dynamicFeatureID = featureID - eStaticFeatureCount();
 if (dynamicFeatureID < 0)
 {
  if (eFeature == null)
  {
   throw new IllegalArgumentException("The feature ID" + featureID + " is not a valid feature ID");
  }
  else if (!eFeature.isChangeable())
  {
   throw new IllegalArgumentException("The feature '" + eFeature.getName() + "' is not a valid changeable feature");
  }
  else
  {
   eUnset(eFeature); /* backward compatibility with old generated overrides */ 
  }
 }
 else
 {
  assert eFeature != null : "Invalid featureID: " + featureID;
  eDynamicUnset(dynamicFeatureID, eFeature);
 }
}

/**
 */
@Override
public List<IItemPropertyDescriptor> getPropertyDescriptors(Object object) 
{
 // if (itemPropertyDescriptors == null)
 {
  itemPropertyDescriptors = new ArrayList<IItemPropertyDescriptor>();
  for (EStructuralFeature eFeature : ((EObject)object).eClass().getEAllStructuralFeatures())
  {
   if (!(eFeature instanceof EReference) || !((EReference)eFeature).isContainment())
   {
    itemPropertyDescriptors.add
     (new ItemPropertyDescriptor
      (((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
       getFeatureText(eFeature),
       getResourceLocator().getString
        ("_UI_Property_description", new Object [] { getFeatureText(eFeature), eFeature.getEType().getName() }),
       eFeature,
       eFeature.isChangeable(),
       ItemPropertyDescriptor.GENERIC_VALUE_IMAGE));
   }
  }
 }
 return itemPropertyDescriptors;
}

public GenFeature getRootFeature()
{
 EClass documentRoot = getExtendedMetaData().getDocumentRoot(getEcorePackage());
 if (documentRoot != null)
 {
  for (EStructuralFeature eStructuralFeature : getExtendedMetaData().getAllElements(documentRoot))
  {
   if (eStructuralFeature instanceof EReference && 
      !((EClass)eStructuralFeature.getEType()).isAbstract() && 
      eStructuralFeature.isChangeable())
   {
    return findGenFeature(eStructuralFeature);
   }
  }
 }
 return null;
}
 

public GenFeature getRootFeature()
{
 EClass documentRoot = getExtendedMetaData().getDocumentRoot(getEcorePackage());
 if (documentRoot != null)
 {
  for (EStructuralFeature eStructuralFeature : getExtendedMetaData().getAllElements(documentRoot))
  {
   if (eStructuralFeature instanceof EReference && 
      !((EClass)eStructuralFeature.getEType()).isAbstract() && 
      eStructuralFeature.isChangeable())
   {
    return findGenFeature(eStructuralFeature);
   }
  }
 }
 return null;
}