public AggregateResult Parse(IEnumerable <AggregateAttribute> header)
{
NodeTree nodeTree = NodeParser.Parse(this.Schema, header);
Node valueNode = nodeTree.Items.FirstOrDefault(this.IsResultNode);
Node itemNode = nodeTree.Items.FirstOrDefault(this.IsResultListNode);
AggregateResult result = new AggregateResult(this.Schema);
if (itemNode != null)
{
result.Value = this.CreateReader(result, itemNode);
result.Target = new AggregateTarget()
{
AddMethod = itemNode.Metadata.Parent.Composition.Add,
NewList = itemNode.Metadata.Parent.Composition.Construct,
};
}
else
{
result.Value = this.CreateReader(result, valueNode);
}
return(result);
}
private void AddAggregates(ListResult result, NodeTree nodeTree)
{
foreach (Node node in nodeTree.Nodes.Where(n => n.Data != null && this.IsAggregateValue(n.Metadata)))
{
int bufferIndex = this.Buffer.GetAggregateIndex(node.Identity);
AggregateWriter writer = new AggregateWriter(node)
{
Attribute = new AggregateAttribute(node.Identity.Name, aggregateIndex: bufferIndex, listIndex: null),
Value = this.CreateDataReader(result, node)
};
result.Aggregates.Add(writer);
}
foreach (Node node in nodeTree.Items.Where(n => this.IsAggregateList(n.Metadata)))
{
int bufferIndex = this.Buffer.GetListIndex(node.Metadata);
AggregateWriter writer = new AggregateWriter(node)
{
Attribute = new AggregateAttribute(node.Metadata.Parent.Identity.Name, aggregateIndex: null, listIndex: bufferIndex),
};
result.Aggregates.Add(writer);
}
}
public ListResult Parse(IEnumerable <ColumnAttribute> header)
{
NodeTree nodeTree = NodeParser.Parse(this.Schema, header);
ListResult result = new ListResult(this.Schema, this.QueryType);
this.AddWriters(result, nodeTree);
this.AddAggregates(result, nodeTree);
return(result);
}
public static NodeTree Parse(ISchema schema, IEnumerable <DataAttribute> header)
{
NodeTree tree = new NodeTree(schema);
foreach (DataAttribute attribute in header)
{
AddDataNode(tree, attribute);
}
return(tree);
}
public EnumerateResult Parse(IEnumerable <ColumnAttribute> header)
{
NodeTree nodeTree = NodeParser.Parse(this.Schema, header);
Node valueNode = nodeTree.Items.FirstOrDefault(this.IsResultNode);
Node listNode = nodeTree.Items.FirstOrDefault(this.IsResultListNode);
EnumerateResult result = new EnumerateResult(this.Schema);
result.Value = this.CreateReader(result, listNode ?? valueNode);
return(result);
}
private void AddWriters(ListResult result, NodeTree nodeTree)
{
foreach (Node node in nodeTree.Items.Where(n => this.IsWriterList(n.Metadata)).OrderByDescending(n => n.Depth))
{
TargetWriter writer = new TargetWriter()
{
Source = this.CreateReader(result, node),
};
this.AddPrimaryKey(writer);
this.AddChildKey(result, writer);
result.Writers.Add(writer);
}
TargetWriter resultWriter = result.Writers.FirstOrDefault(w => w.Source.Metadata.Relation.Depth == 0);
TargetWriter resultItemWriter = result.Writers.FirstOrDefault(w => w.Source.Metadata.Relation.Depth == 1);
if (resultWriter != null && resultItemWriter != null)
{
result.Writers.Remove(resultWriter);
}
}
