Package org.hl7.fhir.dstu3.utils

Interface FHIRPathEngine.IEvaluationContext

Enclosing class:

FHIRPathEngine

public static interface FHIRPathEngine.IEvaluationContext

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	FHIRPathEngine.IEvaluationContext.FunctionDetails

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
List<Base>	executeFunction(Object appContext, String functionName, List<List<Base>> parameters)
boolean	log(String argument, List<Base> focus)	when the .log() function is called
Base	resolveConstant(Object appContext, String name)	A constant reference - e.g.
TypeDetails	resolveConstantType(Object appContext, String name)
FHIRPathEngine.IEvaluationContext.FunctionDetails	resolveFunction(String functionName)
Base	resolveReference(Object appContext, String url)	Implementation of resolve() function.

Method Details

resolveConstant

Base resolveConstant(Object appContext,
 String name)
              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

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

FHIRPathEngine.IEvaluationContext.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,
 String functionName,
 List<List<Base>> parameters)

Parameters:

appContext -

functionName -

parameters -

Returns:

resolveReference

Base resolveReference(Object appContext,
 String url)

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

Parameters:

url -

Returns: