/// <exclude />
public static Guid GetMetaDataReferencedPageId(IData metaData)
{
PropertyInfo propertyInfo = PageMetaDataFacade.GetDefinitionPageReferencePropertyInfo(metaData.DataSourceId.InterfaceType);
Guid pageId = (Guid)propertyInfo.GetValue(metaData, null);
return(pageId);
}
/// <summary>
/// Using the given pageType this methods adds meta data instances that are missing
/// </summary>
/// <param name="definingPageType"></param>
/// <param name="metaDataDefinitionName"></param>
/// <param name="newDataTemplate"></param>
public static void AddNewMetaDataToExistingPages(this IPageType definingPageType, string metaDataDefinitionName, IData newDataTemplate)
{
IPageMetaDataDefinition pageMetaDataDefinition = GetMetaDataDefinition(definingPageType.Id, metaDataDefinitionName);
DataTypeDescriptor dataTypeDescriptor = DynamicTypeManager.GetDataTypeDescriptor(pageMetaDataDefinition.MetaDataTypeId);
Type metaDataType = TypeManager.GetType(dataTypeDescriptor.TypeManagerTypeName);
IEnumerable <IPage> affectedPages = PageMetaDataFacade.GetMetaDataAffectedPagesByPageTypeId(definingPageType.Id);
AddNewMetaDataToExistingPages(affectedPages, metaDataDefinitionName, metaDataType, newDataTemplate);
}
/// <exclude />
public static IData GetMetaData(Guid pageId, Guid pageVersionId, string definitionName, Type metaDataType)
{
Verify.ArgumentNotNull(definitionName, nameof(definitionName));
Verify.ArgumentNotNull(metaDataType, nameof(metaDataType));
//TODO: Consider caching here
var parameterExpression = Expression.Parameter(metaDataType);
var lambdaExpression = Expression.Lambda(
Expression.And(
Expression.And(
Expression.Equal(
Expression.Property(
parameterExpression,
PageMetaDataFacade.GetDefinitionNamePropertyInfo(metaDataType)
),
Expression.Constant(
definitionName,
typeof(string)
)
),
Expression.Equal(
Expression.Property(
parameterExpression,
GetDefinitionPageReferencePropertyInfo(metaDataType)
),
Expression.Constant(
pageId,
typeof(Guid)
)
)
),
Expression.Equal(
Expression.Property(
parameterExpression,
GetDefinitionPageReferencePropertyVersionInfo(metaDataType)
),
Expression.Constant(
pageVersionId,
typeof(Guid)
)
)
),
parameterExpression
);
Expression whereExpression = ExpressionCreator.Where(DataFacade.GetData(metaDataType).Expression, lambdaExpression);
IEnumerable <IData> dataset = ExpressionHelper.GetCastedObjects <IData>(metaDataType, whereExpression);
return(dataset.SingleOrDefaultOrException("There're multiple meta data on a page. Page '{0}', definition name '{1}', meta type '{2}'",
pageId, definitionName, metaDataType.FullName));
}
