public static Clusterer CreateClusterer(CancellationToken cancellationToken, ClusteringSpec clusteringSpec, ReportResults reportResults)
{
var pivotedPropertySet = new PivotedProperties(reportResults.ItemProperties);
pivotedPropertySet = pivotedPropertySet.ChangeSeriesGroups(pivotedPropertySet.CreateSeriesGroups()).ReorderItemProperties();
var clusteredProperties = ClusteredProperties.FromClusteringSpec(clusteringSpec, pivotedPropertySet);
if (!clusteredProperties.RowValues.Any() && !clusteredProperties.ColumnValues.Any())
{
clusteringSpec = ClusteringSpec.GetDefaultClusteringSpec(cancellationToken, reportResults, pivotedPropertySet);
if (clusteringSpec == null)
{
return(null);
}
clusteredProperties = ClusteredProperties.FromClusteringSpec(clusteringSpec, pivotedPropertySet);
}
return(new Clusterer(cancellationToken, reportResults.RowItems, clusteredProperties, ClusterMetricType.FromName(clusteringSpec.DistanceMetric) ?? ClusterMetricType.DEFAULT));
}
public static ClusteredProperties FromClusteringSpec(ClusteringSpec clusteringSpec, PivotedProperties pivotedProperties)
{
var allRoles = clusteringSpec.ToValueTransformDictionary();
var rowTransforms = new Dictionary <string, ClusterRole.Transform>();
var rowHeaders = new List <DataPropertyDescriptor>();
foreach (var property in pivotedProperties.UngroupedProperties)
{
var columnRef = ClusteringSpec.ColumnRef.FromPropertyDescriptor(property);
if (columnRef != null && allRoles.TryGetValue(columnRef, out ClusterRole role))
{
if (role == ClusterRole.ROWHEADER)
{
rowHeaders.Add(property);
}
else if (role is ClusterRole.Transform transform)
{
rowTransforms.Add(property.Name, transform);
}
}
}
var columnRoles = new Dictionary <object, ClusterRole>();
foreach (var group in pivotedProperties.SeriesGroups)
{
foreach (var series in group.SeriesList)
{
var columnRef = ToColumnRef(series);
if (columnRef != null && allRoles.TryGetValue(columnRef, out ClusterRole role))
{
if (role == ClusterRole.COLUMNHEADER || role is ClusterRole.Transform)
{
columnRoles.Add(series.SeriesId, role);
}
}
}
}
return(new ClusteredProperties(pivotedProperties, rowHeaders, rowTransforms, columnRoles));
}
public static ClusteringSpec ReadXml(XmlReader reader)
{
var xElement = (XElement)XNode.ReadFrom(reader);
var values = new List <ValueSpec>();
foreach (var elValue in xElement.Elements(EL_VALUE))
{
var role = elValue.Attribute(ATTR_ROLE)?.Value;
if (role == null)
{
continue;
}
ColumnRef columnRef = null;
var columnid = elValue.Attribute(ATTR_COLUMN_ID)?.Value;
if (columnid != null)
{
columnRef = new ColumnRef(new ColumnId(columnid));
}
else
{
columnRef = new ColumnRef(PropertyPath.Parse(elValue.Attribute(ATTR_PROPERTY_PATH)?.Value));
}
values.Add(new ValueSpec(columnRef, role));
}
var spec = new ClusteringSpec(values);
var attrDistanceMetric = xElement.Attribute(ATTR_DISTANCE_METRIC);
if (attrDistanceMetric != null)
{
spec = spec.ChangeDistanceMetric(attrDistanceMetric.Value);
}
return(spec);
}
public static ReportResults PerformClustering(CancellationToken cancellationToken, ClusteringSpec clusteringSpec, ReportResults reportResults)
{
return(CreateClusterer(cancellationToken, clusteringSpec, reportResults)?.GetClusteredResults());
}
protected bool Equals(ClusteringSpec other)
{
return(Equals(Values, other.Values) && DistanceMetric == other.DistanceMetric);
}
