public ItemBuilder(RelationIdentity relation, MetadataIdentity source)
{
this.relation = relation ?? throw new ArgumentNullException(nameof(relation));
this.sourceMetadata = source.GetMetadata <IRelationMetadata>();
this.headingMetadata = relation.Heading.Select(m => m.GetMetadata <IRelationMetadata>()).ToArray();
this.Validate();
}
public static FuncDescriptor GetDescriptor(RelationIdentity relation, MetadataIdentity source)
{
FuncKey key = new FuncKey(relation, source);
return(cache.GetOrAdd(key, _ =>
{
ListBuilder listBuilder = new ListBuilder(relation, source);
RelationNode relationNode = listBuilder.Build();
FuncBuilder funcBuilder = new FuncBuilder(relationNode);
return funcBuilder.Build();
}));
}
public static IBindingParameterContract GetParameterContract(RelationIdentity relation)
{
if (relation == null)
{
throw new ArgumentNullException(nameof(relation));
}
return(Resolvers.GetOrAdd(relation, _ =>
{
IBindingMetadata[] bindings = relation.Heading.Select(m => m.GetMetadata <IBindingMetadata>()).ToArray();
return TvpHelper.GetParameterContract(bindings);
}));
}
/// <summary>
/// Appends a table-valued parameter from the current values, e.g. <c>@TP0</c>, to the projection buffer.
/// </summary>
/// <param name="projection">The current projection.</param>
/// <returns>A new attribute containing the appended buffer.</returns>
public static IProjectionAttribute TvpName(this IProjection projection)
{
if (projection.Source == null)
{
throw ProjectionException.ValueNotFound(projection);
}
else if (!projection.Attributes.Any())
{
throw ProjectionException.FromProjection(projection, "No attributes found.");
}
IProjectionMetadata metadata = TvpHelper.GetPreferredTvpMetadata(projection);
IField source = new Relation(projection.Source, metadata.Identity.Name).Scalar();
RelationIdentity identity = new RelationIdentity(metadata.Identity.Schema, projection.Attributes.Select(a => a.Metadata.Identity));
IBindingParameterContract contract = TvpCache.GetParameterContract(identity);
string paramName = projection.Context.Lookup.Custom("TP", projection.Identity, field: source);
string dialectName = projection.Context.Domain.Dialect.Parameter(paramName);
return(projection.Attr().Append(dialectName).Append(new Parameter(paramName, source, contract)));
}
public ListBuilder(RelationIdentity relation, MetadataIdentity source)
{
this.relation = relation ?? throw new ArgumentNullException(nameof(relation));
this.source = source ?? throw new ArgumentNullException(nameof(source));
}
public FuncKey(RelationIdentity relation, MetadataIdentity source)
{
this.Relation = relation ?? throw new ArgumentNullException(nameof(relation));
this.Source = source ?? throw new ArgumentNullException(nameof(source));
}
