protected void Check()
{
string entity;
string relatedEntity;
if (this is ManyToManyRelationship)
{
ManyToManyRelationship manyToManyRelationship = this as ManyToManyRelationship;
entity = manyToManyRelationship.OneToManyRelationship.Entity;
relatedEntity = manyToManyRelationship.ManyToOneRelationship.RelatedEntity;
if (manyToManyRelationship.OneToManyRelationship.RelatedEntity != manyToManyRelationship.ManyToOneRelationship.Entity)
{
throw new SchemaException(SchemaMessages.RelationshipsNonConnected);
}
}
else if (this is PlainRelationship)
{
PlainRelationship plainRelationship = this as PlainRelationship;
entity = plainRelationship.DirectRelationships[0].Entity;
relatedEntity = plainRelationship.DirectRelationships[plainRelationship.DirectRelationships.Length - 1].RelatedEntity;
}
else //if (this is Relationship)
{
entity = this.DirectRelationships[0].Entity;
relatedEntity = this.DirectRelationships[this.DirectRelationships.Length - 1].RelatedEntity;
}
if (Entity != entity)
{
throw new SchemaException(string.Format(SchemaMessages.ConflictingEntities, Entity, entity));
}
if (RelatedEntity != relatedEntity)
{
throw new SchemaException(string.Format(SchemaMessages.ConflictingRelatedEntities, RelatedEntity, relatedEntity));
}
}
private static PlainRelationship Reverse(PlainRelationship relationship)
{
string entity = relationship.RelatedEntity;
string relatedEntity = relationship.Entity;
List <DirectRelationship> relationships = new List <DirectRelationship>();
for (int i = relationship.DirectRelationships.Length - 1; i >= 0; i--)
{
relationships.Add(relationship.DirectRelationships[i].Reverse());
}
if (relationship is ManyToOneRelationship)
{
return(new OneToManyRelationship(entity, relatedEntity, relationships));
}
else if (relationship is OneToManyRelationship)
{
return(new ManyToOneRelationship(entity, relatedEntity, relationships));
}
else if (relationship is OneToOneRelationship)
{
return(new OneToOneRelationship(entity, relatedEntity, relationships));
}
else
{
throw new NotSupportedException(relationship.GetType().ToString()); // never
}
}
private static void Connect(PlainRelationship relationship, List <PlainRelationship> decreasing, List <PlainRelationship> list)
{
PlainRelationship prev = decreasing.FirstOrDefault(r => r.RelatedEntity == relationship.Entity);
if (prev == null)
{
PlainRelationship rel = decreasing.FirstOrDefault(r => r.Entity == relationship.Entity);
if (rel is OneToOneRelationship)
{
prev = (PlainRelationship)rel.Reverse();
decreasing.Remove(rel);
}
}
else
{
decreasing.Remove(prev);
}
if (prev != null)
{
int index = list.IndexOf(relationship);
list.Insert(index, prev);
Connect(prev, decreasing, list);
}
PlainRelationship next = decreasing.FirstOrDefault(r => r.Entity == relationship.RelatedEntity);
if (next == null)
{
PlainRelationship rel = decreasing.FirstOrDefault(r => r.RelatedEntity == relationship.RelatedEntity);
if (rel is OneToOneRelationship)
{
next = (PlainRelationship)rel.Reverse();
decreasing.Remove(rel);
}
}
else
{
decreasing.Remove(next);
}
if (next != null)
{
list.Add(next);
Connect(next, decreasing, list);
}
}
protected static IEnumerable <PlainRelationship> Connect(IEnumerable <PlainRelationship> relationships, string relationship)
{
List <PlainRelationship> decreasing = new List <PlainRelationship>(relationships);
List <PlainRelationship> list = new List <PlainRelationship>();
PlainRelationship first = decreasing.First();
decreasing.Remove(first);
list.Add(first);
Connect(first, decreasing, list);
if (list.Count < relationships.Count())
{
throw new SchemaException(string.Format(SchemaMessages.RelationshipsNonConnected, relationship));
}
return(list);
}
private static XElement PlainRelationshipToXml(PlainRelationship relationship)
{
XElement relationshipSchema = new XElement(SchemaVocab.Relationship);
relationshipSchema.SetAttributeValue(SchemaVocab.Name, relationship.Name);
string type;
if (relationship is ManyToOneRelationship)
{
type = SchemaVocab.ManyToOne;
}
else if (relationship is OneToManyRelationship)
{
type = SchemaVocab.OneToMany;
}
else if (relationship is OneToOneRelationship)
{
type = SchemaVocab.OneToOne;
}
else
{
throw new NotSupportedException(relationship.GetType().ToString()); // never
}
relationshipSchema.SetAttributeValue(SchemaVocab.Type, type);
relationshipSchema.SetAttributeValue(SchemaVocab.Entity, relationship.Entity);
relationshipSchema.SetAttributeValue(SchemaVocab.RelatedEntity, relationship.RelatedEntity);
if (relationship.DirectRelationships.Length == 1)
{
DirectRelationship rel = relationship.DirectRelationships[0];
for (int i = 0; i < rel.Properties.Length; i++)
{
XElement xProperty = new XElement(SchemaVocab.Property);
xProperty.SetAttributeValue(SchemaVocab.Name, rel.Properties[i]);
xProperty.SetAttributeValue(SchemaVocab.RelatedProperty, rel.RelatedProperties[i]);
relationshipSchema.Add(xProperty);
}
}
else
{
foreach (DirectRelationship rel in relationship.DirectRelationships)
{
XElement relSchema = new XElement(SchemaVocab.Relationship);
string relType;
if (rel is ManyToOneDirectRelationship)
{
relType = SchemaVocab.ManyToOne;
}
else if (rel is OneToManyDirectRelationship)
{
relType = SchemaVocab.OneToMany;
}
else if (rel is OneToOneDirectRelationship)
{
relType = SchemaVocab.OneToOne;
}
else
{
throw new NotSupportedException(rel.GetType().ToString()); // never
}
relSchema.SetAttributeValue(SchemaVocab.Type, relType);
relSchema.SetAttributeValue(SchemaVocab.Entity, rel.Entity);
relSchema.SetAttributeValue(SchemaVocab.RelatedEntity, rel.RelatedEntity);
for (int i = 0; i < rel.Properties.Length; i++)
{
XElement xProperty = new XElement(SchemaVocab.Property);
xProperty.SetAttributeValue(SchemaVocab.Name, rel.Properties[i]);
xProperty.SetAttributeValue(SchemaVocab.RelatedProperty, rel.RelatedProperties[i]);
relSchema.Add(xProperty);
}
relationshipSchema.Add(relSchema);
}
}
return(relationshipSchema);
}
