// RETURNS NULL WHEN ABOVECATEGORY IS NULL public abstract Category GetAboveCategory(Category category);
public abstract IEnumerable<Article> GetArticlesByCategory(Category category);
public abstract bool DeleteCategory(Category category);
public abstract bool DeleteCategoryFromArticle(Article article, Category category, bool delete_all = false);
public abstract bool UpdateCategory(Category category);
// Add, basically the same as Save, but you can Add many categories/authorships/annotations to the same article // So to point this out I used different word public abstract bool AddCategoryToArticle(Article article, Category category);
public void AddCategory(Category category)
{
XmlNode node = this.CreateDatafield("904");
XmlNode categ= this.CreateSubfield(category.Info, "a");
node.AppendChild(categ);
record.AppendChild(node);
}
public abstract bool SaveCategory(Category category);
public override bool AddCategoryToArticle(Article article, Category category)
{
throw new NotImplementedException();
}
public override bool UpdateCategory(Category category)
{
throw new NotImplementedException();
}
public override IEnumerable<Article> GetArticlesByCategory(Category category)
{
throw new NotImplementedException();
}
public override Category GetAboveCategory(Category category)
{
throw new NotImplementedException();
}
public override bool DeleteCategoryFromArticle(Article article, Category category, bool delete_all = false)
{
throw new NotImplementedException();
}