Package pt.ptcris

Class PTCRISGrouper

java.lang.Object

pt.ptcris.PTCRISGrouper

public class PTCRISGrouper
extends java.lang.Object

A generic activity grouper for the PTCRIS framework. The method is customizable by a comparison criteria that determines when two activities match each other, in which case they are grouped together. This relationship is transitive: two non-matching activities may belong to the same group if they both match a third one.

The user should provide an activity comparator that defines matching activities by calculating a similarity metric, and the respective threshold.

TODO: Activities within groups are not ordered, groups are sets. Should they be? Specifically, ordered by meta-data quality (e.g., number of filled fields). TODO: Singleton groups are being returned. Does this encumber the process? Should they be filtered by the grouper or by requesting services?

Constructor Summary

Constructors

Constructor	Description
PTCRISGrouper()

Method Summary

Modifier and Type	Method	Description
static <E> java.util.List<ActivityGroup<E>>	group(java.util.Collection<E> locals, ActivityComparator<E> comparator)	Groups a list of local activities into groups of matching activities, according to the provided comparator.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PTCRISGrouper

public PTCRISGrouper()

Method Detail

group

public static <E> java.util.List<ActivityGroup<E>> group(java.util.Collection<E> locals,
                                                         ActivityComparator<E> comparator)

Groups a list of local activities into groups of matching activities, according to the provided comparator.

Type Parameters:

E - the type of entries being grouped

Parameters:

locals - the local activities to be grouped

comparator - the provided activity comparator

Returns:

the local activities, grouped