private void AppendField(
SqlUtils.NavigationStep step,
MetadataProperty prop,
StringBuilder sb)
{
sb.AppendFormat("[{0}].[{1}]", step != null ? (object)step.TargetAlias : (object)this.Alias, (object)prop.DataField);
}
public ExternalAssociationNavigationStep(
SqlUtils.Navigation navigation,
SqlUtils.NavigationStep predecessor,
string path,
MetadataAssociationRef externalAssociationRef)
: base(navigation, predecessor, path)
{
this.ExternalAssociationRef = externalAssociationRef;
}
public ChildNavigationStep(
SqlUtils.Navigation navigation,
SqlUtils.NavigationStep predecessor,
string path,
MetadataChildRef childRef)
: base(navigation, predecessor, path)
{
this.ChildRef = childRef;
}
public AssociationNavigationStep(
SqlUtils.Navigation navigation,
SqlUtils.NavigationStep predecessor,
string path,
MetadataAssociationRef associationRef)
: base(navigation, predecessor, path)
{
this.AssociationRef = associationRef;
}
protected NavigationStep(
SqlUtils.Navigation navigation,
SqlUtils.NavigationStep predecessor,
string path)
{
this.Owner = navigation;
this.Predecessor = predecessor;
this.Path = path;
}
public SqlUtils.NavigationStep EnsureRootStep(string path)
{
SqlUtils.NavigationStep navigationStep1 = !string.IsNullOrEmpty(path) ? this.FindRootStep(path) : throw new ArgumentNullException(nameof(path));
if (navigationStep1 != null)
{
return(navigationStep1);
}
string predecessorPath;
string identifier;
MetadataClass refClass1;
bool isExternalRef;
SqlUtils.Navigation.ParseLastPartOfPath(this.Class.Metadata.Classes, path, out predecessorPath, out identifier, out refClass1, out isExternalRef);
SqlUtils.NavigationStep predecessor = !string.IsNullOrEmpty(predecessorPath) ? this.EnsureRootStep(predecessorPath) : (SqlUtils.NavigationStep)null;
MetadataClass refClass2 = predecessor != null ? predecessor.TargetClass : this.Class;
SqlUtils.NavigationStep navigationStep2;
if (isExternalRef)
{
MetadataProperty metadataProperty = refClass1.Properties.Need(identifier);
if (!metadataProperty.IsLink)
{
throw new Exception(string.Format("Свойство \"{0}.{1}\" не является отношением.", (object)refClass1.Name, (object)identifier));
}
navigationStep2 = (SqlUtils.NavigationStep) new SqlUtils.ExternalAssociationNavigationStep(this, predecessor, path, metadataProperty.Association.Refs.Need(refClass2));
}
else
{
MetadataProperty property;
MetadataChildRef childRef;
refClass2.NeedMember(identifier, out property, out childRef);
if (property != null)
{
if (!property.IsLink)
{
throw new DataException(string.Format("\"{0}\" не является ассоциацией или дочерним объектом.", (object)identifier));
}
MetadataAssociationRefList refs = property.Association.Refs;
if (refClass1 == null && refs.Count != 1)
{
throw new DataException(string.Format("\"{0}\" является ассоциацией с вариантами связи. В тексте запроса такое поле следует указывать в форме \"имя-свойства:имя-связанного-класса\" (например, \"Subject:Person\").", (object)identifier));
}
navigationStep2 = (SqlUtils.NavigationStep) new SqlUtils.AssociationNavigationStep(this, predecessor, path, refClass1 == null ? refs[0] : refs.Need(refClass1));
}
else
{
navigationStep2 = (SqlUtils.NavigationStep) new SqlUtils.ChildNavigationStep(this, predecessor, path, childRef);
}
}
navigationStep2.TargetAlias = this.CreateUniqueAlias(navigationStep2.TargetClass.DataTable);
this.RootSteps.Add(navigationStep2);
return(navigationStep2);
}
private SqlUtils.NavigationStep FindRootStep(string path)
{
for (int index = 0; index < this.RootSteps.Count; ++index)
{
SqlUtils.NavigationStep rootStep = this.RootSteps[index];
if (string.Compare(rootStep.Path, path, true) == 0)
{
return(rootStep);
}
}
return((SqlUtils.NavigationStep)null);
}
public void RegisterIdentifier(
string ident,
out SqlUtils.NavigationStep step,
out MetadataProperty prop)
{
int length = ident.LastIndexOf('.');
string name;
if (length >= 0)
{
step = this.EnsureRootStep(ident.Substring(0, length));
name = ident.Substring(length + 1);
}
else
{
step = (SqlUtils.NavigationStep)null;
name = ident;
}
MetadataClass metadataClass = step != null ? step.TargetClass : this.Class;
prop = metadataClass.Properties.Find(name);
}