IEnumerable <CustomChildVerbalizer> IVerbalizeExtensionChildren.GetExtensionChildVerbalizations(object parentElement, IVerbalizeFilterChildren filter, VerbalizationSign sign)
{
// Get the instance data local and release the cached iterator
IORMExtendableElement propertyOwner = parentElement as IORMExtendableElement;
if (propertyOwner != null)
{
PropertyDefinitionFilter propertyFilter = myPropertyFilter;
LinkedElementCollection <ModelElement> extensions = null;
foreach (CustomPropertyDefinition customPropertyDefinition in propertyOwner.Store.ElementDirectory.FindElements <CustomPropertyDefinition>())
{
object defaultValue;
string defaultValueString;
if (!customPropertyDefinition.VerbalizeDefaultValue ||
null == (defaultValue = customPropertyDefinition.DefaultValue) ||
(null != (defaultValueString = defaultValue as string) && defaultValueString.Length == 0) ||
(propertyFilter != null && !propertyFilter(propertyOwner, customPropertyDefinition)))
{
continue;
}
bool haveMatchingProperty = false;
foreach (ModelElement extensionElement in extensions ?? (extensions = propertyOwner.ExtensionCollection))
{
CustomProperty customProperty = extensionElement as CustomProperty;
if (customProperty != null && customProperty.CustomPropertyDefinition == customPropertyDefinition)
{
haveMatchingProperty = true;
break;
}
}
if (!haveMatchingProperty)
{
DefaultPropertyValueVerbalizer verbalizer = DefaultPropertyValueVerbalizer.GetVerbalizer();
verbalizer.Attach(customPropertyDefinition);
yield return(CustomChildVerbalizer.VerbalizeInstance(verbalizer, true));
}
}
}
}
/// <summary>
/// Create a child verbalizer with the specified delegate filter.
/// </summary>
/// <param name="filter">A filter used to determine which properties to verbalize</param>
public DefaultCustomPropertyVerbalizer(PropertyDefinitionFilter filter)
{
myPropertyFilter = filter;
}
/// <summary>
/// Create a child verbalizer with the specified delegate filter.
/// </summary>
/// <param name="filter">A filter used to determine which properties to verbalize</param>
public DefaultCustomPropertyVerbalizer(PropertyDefinitionFilter filter)
{
myPropertyFilter = filter;
}
