Interface IWorkerContext

All Known Implementing Classes:
BaseWorkerContext, HapiWorkerContext, 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
  • Method Details

    • getVersion

      Get the versions of the definitions loaded in context
      Returns:
    • getSpecUrl

      return the link to the base of the specification for the loaded version e.g. http://hl7.org/fhir/R4
    • getUcumService

      org.fhir.ucum.UcumService getUcumService()
    • getParser

      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

      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

      Get a JSON parser
      Returns:
    • newXmlParser

      Get an XML parser
      Returns:
    • newValidator

      IResourceValidator newValidator() throws org.hl7.fhir.exceptions.FHIRException
      Get a validator that can check whether a resource is valid
      Returns:
      a prepared generator
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • 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:
      org.hl7.fhir.exceptions.FHIRException
      Exception
    • fetchResourceWithException

      <T extends Resource> T fetchResourceWithException(Class<T> class_, String uri) throws org.hl7.fhir.exceptions.FHIRException
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • fetchResource

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

      <T extends Resource> T fetchResource(Class<T> class_, String uri, CanonicalResource canonicalForSource)
      has the same functionality as fetchResource, but passes in information about the source of the reference (this may affect resolution of version)
      Type Parameters:
      T -
      Parameters:
      class_ -
      uri -
      canonicalForSource -
      Returns:
    • fetchResourceById

      Variation of fetchResource when you have a string type, and don't need the right class 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] if type == null, the URI can't be a simple logical id
      Parameters:
      type -
      uri -
      Returns:
    • 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:
    • cacheResource

      void cacheResource(Resource res) throws org.hl7.fhir.exceptions.FHIRException
      cache a resource for later retrieval using fetchResource. Note that various context implementations will have their own ways of loading rseources, and not all need implement cacheResource. If the resource is loaded out of a package, call cacheResourceFromPackage instead
      Parameters:
      res -
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • cacheResourceFromPackage

      void cacheResourceFromPackage(Resource res, IWorkerContext.PackageVersion packageDetails) throws org.hl7.fhir.exceptions.FHIRException
      cache a resource for later retrieval using fetchResource. The package information is used to help manage the cache internally, and to help with reference resolution. Packages should be define using cachePackage (but don't have to be) Note that various context implementations will have their own ways of loading rseources, and not all need implement cacheResource
      Parameters:
      res -
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • cachePackage

      Inform the cache about package dependencies. This can be used to help resolve references Note that the cache doesn't load dependencies
      Parameters:
      packageInfo -
    • getResourceNames

      Returns:
      a list of the resource names defined for this version
    • getResourceNamesAsSet

      Returns:
      a set of the resource names defined for this version
    • getCanonicalResourceNames

      Returns:
      a list of the resource names that are canonical resources defined for this version
    • getTypeNames

      Returns:
      a list of the resource and type names defined for this version
    • allStructures

      Returns:
      a list of all structure definitions, with snapshots generated (if possible)
    • getStructures

      Returns:
      a list of all structure definitions, without trying to generate snapshots
    • allConformanceResources

      Returns:
      a list of all conformance resources
    • generateSnapshot

      void generateSnapshot(StructureDefinition p) throws org.hl7.fhir.exceptions.DefinitionException, org.hl7.fhir.exceptions.FHIRException
      Given a structure definition, generate a snapshot (or regenerate it)
      Parameters:
      p -
      Throws:
      org.hl7.fhir.exceptions.DefinitionException
      org.hl7.fhir.exceptions.FHIRException
    • generateSnapshot

      void generateSnapshot(StructureDefinition mr, boolean ifLogical)
    • getExpansionParameters

      Set the expansion parameters passed through the terminology server when txServer calls are made Note that the Validation Options override these when they are specified on validateCode
    • setExpansionProfile

      void setExpansionProfile(Parameters expParameters)
      Get the expansion parameters passed through the terminology server when txServer calls are made Note that the Validation Options override these when they are specified on validateCode
    • fetchCodeSystem

      Find the code system definition for the nominated system uri. return null if there isn't one (then the tool might try supportsSystem)
      Parameters:
      system -
      Returns:
    • fetchCodeSystem

    • supportsSystem

      boolean supportsSystem(String system) throws org.hl7.fhir.exceptions.TerminologyServiceException
      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/capabilitystatement-supported-system in the Conformance resource
      Parameters:
      system -
      Returns:
      Throws:
      Exception
      org.hl7.fhir.exceptions.TerminologyServiceException
    • findMapsForSource

      List<ConceptMap> findMapsForSource(String url) throws org.hl7.fhir.exceptions.FHIRException
      find concept maps for a source
      Parameters:
      url -
      Returns:
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • expandVS

      ValueSetExpander.ValueSetExpansionOutcome expandVS(ValueSet source, boolean cacheOk, boolean heiarchical)
      ValueSet Expansion - see $expand
      Parameters:
      source -
      Returns:
    • expandVS

      ValueSetExpander.ValueSetExpansionOutcome expandVS(ValueSet source, boolean cacheOk, boolean heiarchical, boolean incompleteOk)
      ValueSet Expansion - see $expand
      Parameters:
      source -
      Returns:
    • expandVS

      ValueSetExpander.ValueSetExpansionOutcome expandVS(ElementDefinition.ElementDefinitionBindingComponent binding, boolean cacheOk, boolean heiarchical) throws org.hl7.fhir.exceptions.FHIRException
      ValueSet Expansion - see $expand, but resolves the binding first
      Parameters:
      source -
      Returns:
      Throws:
      org.hl7.fhir.exceptions.FHIRException
    • expandVS

      ValueSetExpander.ValueSetExpansionOutcome expandVS(ValueSet.ConceptSetComponent inc, boolean hierarchical, boolean noInactive) throws org.hl7.fhir.exceptions.TerminologyServiceException
      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:
      Throws:
      org.hl7.fhir.exceptions.FHIRException
      org.hl7.fhir.exceptions.TerminologyServiceException
    • getLocale

    • setLocale

      void setLocale(Locale locale)
    • formatMessage

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

    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, String code, ValueSet vs)
      Validation of a code - consult the terminology infrstructure and/or 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 in this case, the system will be inferred from the value set. It's an error to call this one without the value set
      Parameters:
      options - - validation options (required)
      code - he code to validate (required)
      vs - the applicable valueset (required)
      Returns:
    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, String system, String version, String code, String display)
      Validation of a code - consult the terminology infrstructure and/or 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:
      options - - validation options (required)
      system - - equals Coding.system (required)
      code - - equals Coding.code (required)
      display - - equals Coding.display (optional)
      Returns:
    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, String system, String version, String code, String display, ValueSet vs)
      Validation of a code - consult the terminology infrstructure and/or 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:
      options - - validation options (required)
      system - - equals Coding.system (required)
      code - - equals Coding.code (required)
      display - - equals Coding.display (optional)
      vs - the applicable valueset (optional)
      Returns:
    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, CodeableConcept code, ValueSet vs)
      Validation of a code - consult the terminology infrstructure and/or 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 Note that this doesn't validate binding strength (e.g. is just text allowed?)
      Parameters:
      options - - validation options (required)
      code - - CodeableConcept to validate
      vs - the applicable valueset (optional)
      Returns:
    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, Coding code, ValueSet vs)
      Validation of a code - consult the terminology infrstructure and/or 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 in this case, the system will be inferred from the value set. It's an error to call this one without the value set
      Parameters:
      options - - validation options (required)
      code - - Coding to validate
      vs - the applicable valueset (optional)
      Returns:
    • validateCode

      IWorkerContext.ValidationResult validateCode(org.hl7.fhir.utilities.validation.ValidationOptions options, Coding code, ValueSet vs, ValidationContextCarrier ctxt)
    • validateCodeBatch

      void validateCodeBatch(org.hl7.fhir.utilities.validation.ValidationOptions options, List<? extends IWorkerContext.CodingValidationRequest> codes, ValueSet vs)
    • getAbbreviation

      returns the recommended tla for the type (from the structure definitions)
      Parameters:
      name -
      Returns:
    • oid2Uri

      translate an OID to a URI (look through known NamingSystems)
      Parameters:
      code -
      Returns:
    • getNSUrlMap

    • hasCache

      boolean hasCache()
      Returns:
      true if the contxt has a terminology caching service internally
    • setLogger

    • getLogger

    • isNoTerminologyServer

    • getCodeSystemsUsed

    • translator

      org.hl7.fhir.utilities.TranslationServices translator()
    • listTransforms

    • getTransform

    • getOverrideVersionNs

    • setOverrideVersionNs

    • fetchTypeDefinition

    • fetchRawProfile

    • setUcumService

      void setUcumService(org.fhir.ucum.UcumService ucumService)
    • getLinkForUrl

    • getBinaryKeysAsSet

      Returns a set of keys that can be used to get binaries from this context.
      Returns:
      a set of binaries or null
    • hasBinaryKey

      boolean hasBinaryKey(String binaryKey)
      Returns true if this worker context contains a binary for this key.
      Parameters:
      binaryKey -
      Returns:
      true if binary is available for this key
    • getBinaryForKey

      byte[] getBinaryForKey(String binaryKey)
      Returns the binary for the key
      Parameters:
      binaryKey -
      Returns:
    • loadFromPackage

      int loadFromPackage(org.hl7.fhir.utilities.npm.NpmPackage pi, IWorkerContext.IContextResourceLoader loader) throws FileNotFoundException, IOException, org.hl7.fhir.exceptions.FHIRException
      Load relevant resources of the appropriate types (as specified by the loader) from the nominated package note that the package system uses lazy loading; the loader will be called later when the classes that use the context need the relevant resource
      Parameters:
      pi - - the package to load
      loader - - an implemenation of IContextResourceLoader that knows how to read the resources in the package (e.g. for the appropriate version).
      Returns:
      the number of resources loaded
      Throws:
      FileNotFoundException
      IOException
      org.hl7.fhir.exceptions.FHIRException
    • loadFromPackage

      @Deprecated int loadFromPackage(org.hl7.fhir.utilities.npm.NpmPackage pi, IWorkerContext.IContextResourceLoader loader, String[] types) throws FileNotFoundException, IOException, org.hl7.fhir.exceptions.FHIRException
      Deprecated.
      Load relevant resources of the appropriate types (as specified by the loader) from the nominated package note that the package system uses lazy loading; the loader will be called later when the classes that use the context need the relevant resource Deprecated - use the simpler method where the types come from the loader.
      Parameters:
      pi - - the package to load
      loader - - an implemenation of IContextResourceLoader that knows how to read the resources in the package (e.g. for the appropriate version).
      types - - which types of resources to load
      Returns:
      the number of resources loaded
      Throws:
      FileNotFoundException
      IOException
      org.hl7.fhir.exceptions.FHIRException
    • loadFromPackageAndDependencies

      int loadFromPackageAndDependencies(org.hl7.fhir.utilities.npm.NpmPackage pi, IWorkerContext.IContextResourceLoader loader, org.hl7.fhir.utilities.npm.BasePackageCacheManager pcm) throws FileNotFoundException, IOException, org.hl7.fhir.exceptions.FHIRException
      Load relevant resources of the appropriate types (as specified by the loader) from the nominated package note that the package system uses lazy loading; the loader will be called later when the classes that use the context need the relevant resource This method also loads all the packages that the package depends on (recursively)
      Parameters:
      pi - - the package to load
      loader - - an implemenation of IContextResourceLoader that knows how to read the resources in the package (e.g. for the appropriate version).
      pcm - - used to find and load additional dependencies
      Returns:
      the number of resources loaded
      Throws:
      FileNotFoundException
      IOException
      org.hl7.fhir.exceptions.FHIRException
    • hasPackage

      boolean hasPackage(String id, String ver)
    • hasPackage

    • getPackage

    • getClientRetryCount

    • setClientRetryCount

    • clock

      org.hl7.fhir.utilities.TimeTracker clock()
    • getPackageTracker

    • setPackageTracker

    • getPackageForUrl