This is documentation for Caché & Ensemble.

For information on converting to InterSystems IRIS, see the InterSystems IRIS Adoption Guide and the InterSystems IRIS In-Place Conversion Guide, both available on the WRC Distributions page (login required).

Home > Class Reference > %SYS namespace > %iKnow.Filters.DictionaryItemMatchFilter

%iKnow.Filters.DictionaryItemMatchFilter

class %iKnow.Filters.DictionaryItemMatchFilter extends %iKnow.Filters.Filter

%iKnow.Filters.Filter implementation selecting sources based on whether they contain a minimum and/or maximum number or total score of dictionary item matches.

NOTE: by default, this filter only uses existing match results and will only ensure all sources are fully matched when the ensureMatched parameter is enabled!

Filter parameters:

  1. pDomainId As %Integer
  2. pDictItemIds As %List - target dictionary items (ORed together). Use negative IDs to refer to cross-domain dictionary items.
  3. pMin As %Numeric (default 1) - minimum count or total score (-1 = no minimum)
  4. pMax As %Numeric (default -1) - maximum count or total score (-1 = no maximum)
  5. pMetric As %String (["COUNT"|"SCORE"], default "COUNT") - whether to take the number of matches (default) or their aggregated score.
  6. ensureMatched As %Integer - controls whether or not all sources in the domain are matched through an explicit call to MatchingAPI.MatchSources() as follows:
    • 0 - no explicit matching, use current matching results (default)
    • 1 - match before every invocation of the filter (warning: significant performance impact!)
    • 2 - match once when the filter is instantiated

Property Inventory (Including Private)

Method Inventory (Including Private)

Properties (Including Private)

property DictItemIds as %List;
Property methods: DictItemIdsGet(), DictItemIdsIsValid(), DictItemIdsLogicalToOdbc(), DictItemIdsOdbcToLogical(), DictItemIdsSet()
property EnsureMatched as %Boolean;
Property methods: EnsureMatchedDisplayToLogical(), EnsureMatchedGet(), EnsureMatchedIsValid(), EnsureMatchedLogicalToDisplay(), EnsureMatchedNormalize(), EnsureMatchedSet()
property Max as %Numeric;
Property methods: MaxDisplayToLogical(), MaxGet(), MaxIsValid(), MaxLogicalToDisplay(), MaxNormalize(), MaxSet()
property Metric as %String;
Property methods: MetricDisplayToLogical(), MetricGet(), MetricIsValid(), MetricLogicalToDisplay(), MetricLogicalToOdbc(), MetricNormalize(), MetricSet()
property Min as %Numeric;
Property methods: MinDisplayToLogical(), MinGet(), MinIsValid(), MinLogicalToDisplay(), MinNormalize(), MinSet()

Methods (Including Private)

private method %OnNew(pDomainId As %Integer, pDictItemIds As %List, pMin As %Numeric = 1, pMax As %Numeric = -1, pMetric As %String = "COUNT", pEnsureMatched As %Integer = 0) as %Status
Inherited description: This callback method is invoked by the %New() method to provide notification that a new instance of an object is being created.

If this method returns an error then the object will not be created.

It is passed the arguments provided in the %New call. When customizing this method, override the arguments with whatever variables and types you expect to receive from %New(). For example, if you're going to call %New, passing 2 arguments, %OnNew's signature could be:

Method %OnNew(dob as %Date = "", name as %Name = "") as %Status If instead of returning a %Status code this returns an oref and this oref is a subclass of the current class then this oref will be the one returned to the caller of %New method.

private method BuildSourceFilter(maxOffset As %Integer) as %Status
Inherited description:

This is the primary method that needs to be implemented by an actual %iKnow.Filters.Filter subclass to translate the abstract filter criteria the subclass addresses into a bitstring based on Source IDs. The subclass' implementation of this method should use SetSourceBits() for this purpose, setting the requested bitstrings for each offset up to maxOffset.

method Invalidate(type As %Integer = $$$IKFSOURCE) as %Status

If EnsureMatched=2, filter invalidation (for example as the result of new sources being added to the domain) implies matching all sources.

method ToString() as %String
Inherited description:

Subclasses should implement this method to build a string representation of the filter instance. It should start with the filter class name, followed by a pipe (|) character and then a string representation that can be interpreted by its RestoreFilterFromStringInternal() implementation.

private method Validate(type As %Integer = $$$IKFSOURCE, Output isValid As %Boolean = 0) as %Status

In addition to default %iKnow.Filters.Filter checks, this class ensures match status is up to date for the sources at the supplied offset.

Inherited Members

Inherited Properties (Including Private)

Inherited Methods (Including Private)