abstract class %iKnow.Source.Processor extends %Library.RegisteredObject
This is the base class for any Processor implementations. Processor classes are developed to read source data as referenced (or stored temporarily) by %iKnow.Source.Lister classes in their ExpandList() methods. It is up to the Lister to make sure the references they store in this stage refer to the proper Processor implementation and contain the details it needs to find and read that source while executing FetchSource().
Each Processor implementation tackles a specific type of location where source data can be read from, such as a filesystem for %iKnow.Source.File.Processor or a global for %iKnow.Source.Global.Processor.
Processor objects are handled by the loading framework automatically and custom code should never instantiate a Processor object or call any of its methods directly.
Property Inventory (Including Private)
Method Inventory (Including Private)
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.
This is the primary method that will need to be implemented by subclasses. It gets the local ID of the source being processed (as assigned by the lister) and the Composite Reference in %List format. Data read by the Processor should be buffered through calling ..Buffer.BufferString(), which will automatically forward the data to the iKnow Indexing engine or, if configured, a %iKnow.Source.Converter object that will in turn push converted data through to the engine.
If this Processor also extracts metadata while reading (as specified in its GetMetadataKeys() implementation), it should make sure to invoke SetCurrentMetadataValues() at some point in this methods execution.
This method is called from ProcessListElement() and ProcessVirtualListElement() right before calling on the Indexer to process the data read by this Processor instance. It returns the language (two-letter ISO code) for the source being processed, if there is any means to derive it from known facts about the source. If no language can be derived with enough certainty, this method returns "".
The default implementation looks if there is a $$$IKPLANGUAGEFIELDNAME parameter defined pointing to a metadata field containing the language code. Subclasses may override and/or extend this method if they have access to additional information.
Subclasses should override this method to identify those metadata keys that are calculated or extracted by this Processor implementation and will be registered for every source processed by calling SetCurrentMetadataValues() during the FetchSource() execution.
This is the primary method that will be called from the %iKnow.Source.Loader for each source identified by the %iKnow.Source.Lister objects involved in this loading process. It will buffer what's read in the FetchSource() implementation, trigger the %iKnow.Source.Converter if one is configured, and then instruct the Indexer to process the resulting plain text, directing its output to the appropriate DirectInput object.
Also, this method will gather any metadata set by the Lister, combine it with metadata calculated by the Processor or Converter and push it to the DirectInput object as well.
Registers the Converter to be used by this Processor onwards.
Stores the metadata values for the source currently being processed. Their order and number should correspond to the keys returned by GetMetadataKeys().
Inherited Methods (Including Private)