public GroupedStreamAggregateBuilder(InternalStreamBuilder builder, Grouped <K, V> grouped, List <string> sourceNodes, string name, StreamGraphNode node)
{
this.builder = builder;
this.grouped = grouped;
this.sourceNodes = sourceNodes;
this.name = name;
this.node = node;
}
public IKGroupedStream <K, V> GroupByKey(string named = null)
{
return(new KGroupedStream <K, V>(
this.nameNode,
Grouped <K, V> .Create(named, this.keySerdes, this.valueSerdes),
this.setSourceNodes,
this.node,
builder));
}
public IKGroupedStream <K, V> GroupByKey <KS, VS>(string named = null)
where KS : ISerDes <K>, new()
where VS : ISerDes <V>, new()
{
return(new KGroupedStream <K, V>(
this.nameNode,
Grouped <K, V> .Create <KS, VS>(named),
this.setSourceNodes,
this.node,
builder));
}
public KGroupedStream(string name, Grouped <K, V> grouped, List <string> sourceNodes, StreamGraphNode streamsGraphNode, InternalStreamBuilder builder)
: base(name, grouped.Key, grouped.Value, sourceNodes, streamsGraphNode, builder)
{
}
private IKGroupedStream <KR, V> DoGroup <KR>(IKeyValueMapper <K, V, KR> keySelector, Grouped <KR, V> grouped)
{
if (keySelector == null)
{
throw new ArgumentNullException("GroupBy() doesn't allow null selector function");
}
ProcessorGraphNode <K, V> selectKeyMapNode = InternalSelectKey(keySelector, grouped.Named);
selectKeyMapNode.KeyChangingOperation = true;
builder.AddGraphNode(this.node, selectKeyMapNode);
return(new KGroupedStream <KR, V>(
selectKeyMapNode.streamGraphNode,
grouped,
this.setSourceNodes,
selectKeyMapNode,
builder));
}
public IKGroupedStream <KR, V> GroupBy <KR, KS>(IKeyValueMapper <K, V, KR> keySelector, string named = null)
where KS : ISerDes <KR>, new()
=> DoGroup(keySelector, Grouped <KR, V> .Create <KS>(named, valueSerdes));
public IKGroupedStream <KR, V> GroupBy <KR>(IKeyValueMapper <K, V, KR> keySelector, string named = null) => DoGroup(keySelector, Grouped <KR, V> .Create(named, null, valueSerdes));
private IKGroupedStream <KR, V> DoGroup <KR>(IKeyValueMapper <K, V, KR> keySelector, Grouped <KR, V> grouped)
{
ProcessorGraphNode <K, V> selectKeyMapNode = InternalSelectKey(keySelector, grouped.Named);
selectKeyMapNode.KeyChangingOperation = true;
builder.AddGraphNode(this.node, selectKeyMapNode);
return(new KGroupedStream <KR, V>(
selectKeyMapNode.streamGraphNode,
grouped,
this.setSourceNodes,
selectKeyMapNode,
builder));
}
