Package org.hl7.fhir.dstu2.utils

Interface IWorkerContext

All Known Implementing Classes:

BaseWorkerContext, SimpleWorkerContext

public interface IWorkerContext

This is the standard interface used for access to underlying FHIR services through the tools and utilities provided by the reference implementation. The functionality it provides is - get access to parsers, validators, narrative builders etc (you can't create these directly because they need access to the right context for their information) - find resources that the tools need to carry out their tasks - provide access to terminology services they need. (typically, these terminology service requests are just passed through to the local implementation's terminology service)

Author:

Grahame

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	IWorkerContext.ValidationResult

Method Summary

Modifier and Type	Method	Description
List<StructureDefinition>	allStructures()
ValueSet.ValueSetExpansionComponent	expandVS(ValueSet.ConceptSetComponent inc)	Value set expanion inside the internal expansion engine - used for references to supported system (see "supportsSystem") for which there is no value set.
ValueSetExpander.ValueSetExpansionOutcome	expandVS(ValueSet source, boolean cacheOk)	ValueSet Expansion - see $expand
ValueSet	fetchCodeSystem(String system)	Find a value set for the nominated system uri.
<T extends Resource> T	fetchResource(Class<T> class_, String uri)	Find an identified resource.
StructureDefinition	fetchTypeDefinition(String typeName)
List<ConceptMap>	findMapsForSource(String url)	find concept maps for a source
String	formatMessage(String theMessage, Object... theMessageArguments)
String	getAbbreviation(String name)	returns the recommended tla for the type
Locale	getLocale()
INarrativeGenerator	getNarrativeGenerator(String prefix, String basePath)	Get a generator that can generate narrative for the instance
IParser	getParser(String type)	Get a parser to read/write instances.
IParser	getParser(ParserType type)	Get a parser to read/write instances.
List<String>	getResourceNames()
<T extends Resource> boolean	hasResource(Class<T> class_, String uri)	find whether a resource is available.
IParser	newJsonParser()	Get a JSON parser
IResourceValidator	newValidator()	Get a validator that can check whether a resource is valid
IParser	newXmlParser()	Get an XML parser
void	setLocale(Locale locale)
void	setValidationMessageLanguage(Locale locale)
boolean	supportsSystem(String system)	True if the underlying terminology service provider will do expansion and code validation for the terminology.
IWorkerContext.ValidationResult	validateCode(String system, String code, String display)	Validation of a code - consult the terminology service to see whether it is known.
IWorkerContext.ValidationResult	validateCode(String system, String code, String display, ValueSet vs)	Validation of a code - consult the terminology service to see whether it is known.
IWorkerContext.ValidationResult	validateCode(String system, String code, String display, ValueSet.ConceptSetComponent vsi)	Validation of a code - consult the terminology service to see whether it is known.
IWorkerContext.ValidationResult	validateCode(CodeableConcept code, ValueSet vs)
IWorkerContext.ValidationResult	validateCode(Coding code, ValueSet vs)

Method Detail

getParser

IParser getParser(ParserType type)

Get a parser to read/write instances. Use the defined type (will be extended as further types are added, though the only currently anticipate type is RDF) XML/JSON - the standard renderers XHTML - render the narrative only (generate it if necessary)

Parameters:

type -

Returns:

getParser

IParser getParser(String type)

Get a parser to read/write instances. Determine the type from the stated type. Supported value for type: - the recommended MIME types - variants of application/xml and application/json - _format values xml, json

Parameters:

type -

Returns:

newJsonParser

IParser newJsonParser()

Get a JSON parser

Returns:

newXmlParser

IParser newXmlParser()

Get an XML parser

Returns:

getNarrativeGenerator

INarrativeGenerator getNarrativeGenerator(String prefix,
                                          String basePath)

Get a generator that can generate narrative for the instance

Returns:

a prepared generator

newValidator

IResourceValidator newValidator()

Get a validator that can check whether a resource is valid

Returns:

a prepared generator

fetchResource

<T extends Resource> T fetchResource(Class<T> class_,
                                     String uri)

Find an identified resource. The most common use of this is to access the the standard conformance resources that are part of the standard - structure definitions, value sets, concept maps, etc. Also, the narrative generator uses this, and may access any kind of resource The URI is called speculatively for things that might exist, so not finding a matching resouce, return null, not an error The URI can have one of 3 formats: - a full URL e.g. http://acme.org/fhir/ValueSet/[id] - a relative URL e.g. ValueSet/[id] - a logical id e.g. [id] It's an error if the second form doesn't agree with class_. It's an error if class_ is null for the last form

Parameters:

resource -

Reference -

Returns:

Throws:

Exception

hasResource

<T extends Resource> boolean hasResource(Class<T> class_,
                                         String uri)

find whether a resource is available. Implementations of the interface can assume that if hasResource ruturns true, the resource will usually be fetched subsequently

Parameters:

class_ -

uri -

Returns:

getResourceNames

List<String> getResourceNames()

fetchCodeSystem

ValueSet fetchCodeSystem(String system)

Find a value set for the nominated system uri. return null if there isn't one (then the tool might try supportsSystem)

Parameters:

system -

Returns:

supportsSystem

boolean supportsSystem(String system)

True if the underlying terminology service provider will do expansion and code validation for the terminology. Corresponds to the extension http://hl7.org/fhir/StructureDefinition/conformance-supported-system in the Conformance resource

Parameters:

system -

Returns:

findMapsForSource

List<ConceptMap> findMapsForSource(String url)

find concept maps for a source

Parameters:

url -

Returns:

expandVS

ValueSetExpander.ValueSetExpansionOutcome expandVS(ValueSet source,
                                                   boolean cacheOk)

ValueSet Expansion - see $expand

Parameters:

source -

Returns:

expandVS

ValueSet.ValueSetExpansionComponent expandVS(ValueSet.ConceptSetComponent inc)

Value set expanion inside the internal expansion engine - used for references to supported system (see "supportsSystem") for which there is no value set.

Parameters:

inc -

Returns:

getLocale

Locale getLocale()

setLocale

void setLocale(Locale locale)

formatMessage

String formatMessage(String theMessage,
                     Object... theMessageArguments)

setValidationMessageLanguage

void setValidationMessageLanguage(Locale locale)

validateCode

IWorkerContext.ValidationResult validateCode(String system,
                                             String code,
                                             String display)

Validation of a code - consult the terminology service to see whether it is known. If known, return a description of it note: always return a result, with either an error or a code description corresponds to 2 terminology service calls: $validate-code and $lookup

Parameters:

system -

code -

display -

Returns:

validateCode

IWorkerContext.ValidationResult validateCode(String system,
                                             String code,
                                             String display,
                                             ValueSet vs)

Validation of a code - consult the terminology service to see whether it is known. If known, return a description of it Also, check whether it's in the provided value set note: always return a result, with either an error or a code description, or both (e.g. known code, but not in the value set) corresponds to 2 terminology service calls: $validate-code and $lookup

Parameters:

system -

code -

display -

Returns:

validateCode

IWorkerContext.ValidationResult validateCode(Coding code,
                                             ValueSet vs)

validateCode

IWorkerContext.ValidationResult validateCode(CodeableConcept code,
                                             ValueSet vs)

validateCode

IWorkerContext.ValidationResult validateCode(String system,
                                             String code,
                                             String display,
                                             ValueSet.ConceptSetComponent vsi)

Validation of a code - consult the terminology service to see whether it is known. If known, return a description of it Also, check whether it's in the provided value set fragment (for supported systems with no value set definition) note: always return a result, with either an error or a code description, or both (e.g. known code, but not in the value set) corresponds to 2 terminology service calls: $validate-code and $lookup

Parameters:

system -

code -

display -

Returns:

getAbbreviation

String getAbbreviation(String name)

returns the recommended tla for the type

Parameters:

name -

Returns:

allStructures

List<StructureDefinition> allStructures()

fetchTypeDefinition

StructureDefinition fetchTypeDefinition(String typeName)