Package org.hl7.fhir.r5.utils

Interface FHIRPathEngine.IEvaluationContext

All Known Implementing Classes:

ComparisonRenderer, FFHIRPathHostServices, LiquidEngine

Enclosing class:

FHIRPathEngine

public static interface FHIRPathEngine.IEvaluationContext

Method Summary

Modifier and Type	Method	Description
TypeDetails	checkFunction(Object appContext, String functionName, List<TypeDetails> parameters)	Check the function parameters, and throw an error if they are incorrect, or return the type for the function
boolean	conformsToProfile(Object appContext, Base item, String url)
List<Base>	executeFunction(Object appContext, List<Base> focus, String functionName, List<List<Base>> parameters)
boolean	log(String argument, List<Base> focus)	when the .log() function is called
List<Base>	resolveConstant(Object appContext, String name, boolean beforeContext)	A constant reference - e.g.
TypeDetails	resolveConstantType(Object appContext, String name)
FHIRPathUtilityClasses.FunctionDetails	resolveFunction(String functionName)
Base	resolveReference(Object appContext, String url, Base refContext)	Implementation of resolve() function.
ValueSet	resolveValueSet(Object appContext, String url)

Method Details

resolveConstant

List<Base> resolveConstant(Object appContext,
 String name,
 boolean beforeContext)
                    throws org.hl7.fhir.exceptions.PathEngineException

A constant reference - e.g. a reference to a name that must be resolved in context. The % will be removed from the constant name before this is invoked. This will also be called if the host invokes the FluentPath engine with a context of null

Parameters:

appContext - - content passed into the fluent path engine

name - - name reference to resolve

beforeContext - - whether this is being called before the name is resolved locally, or not

Returns:

the value of the reference (or null, if it's not valid, though can throw an exception if desired)

Throws:

org.hl7.fhir.exceptions.PathEngineException

resolveConstantType

TypeDetails resolveConstantType(Object appContext,
 String name)
                         throws org.hl7.fhir.exceptions.PathEngineException

Throws:

org.hl7.fhir.exceptions.PathEngineException

log

boolean log(String argument,
 List<Base> focus)

when the .log() function is called

Parameters:

argument -

focus -

Returns:

resolveFunction

FHIRPathUtilityClasses.FunctionDetails resolveFunction(String functionName)

Parameters:

functionName -

Returns:

null if the function is not known

checkFunction

TypeDetails checkFunction(Object appContext,
 String functionName,
 List<TypeDetails> parameters)
                   throws org.hl7.fhir.exceptions.PathEngineException

Check the function parameters, and throw an error if they are incorrect, or return the type for the function

Parameters:

functionName -

parameters -

Returns:

Throws:

org.hl7.fhir.exceptions.PathEngineException

executeFunction

List<Base> executeFunction(Object appContext,
 List<Base> focus,
 String functionName,
 List<List<Base>> parameters)

Parameters:

appContext -

functionName -

parameters -

Returns:

resolveReference

Base resolveReference(Object appContext,
 String url,
 Base refContext)
               throws org.hl7.fhir.exceptions.FHIRException

Implementation of resolve() function. Passed a string, return matching resource, if one is known - else null

Parameters:

url - the reference (Reference.reference or the value of the canonical

Returns:

Throws:

org.hl7.fhir.exceptions.FHIRException

conformsToProfile

boolean conformsToProfile(Object appContext,
 Base item,
 String url)
                   throws org.hl7.fhir.exceptions.FHIRException

Throws:

org.hl7.fhir.exceptions.FHIRException

resolveValueSet

ValueSet resolveValueSet(Object appContext,
 String url)