Package fr.mines_stetienne.ci.sparql_generate.iterator

Interface IteratorFunction

All Known Implementing Classes:

ITER_Call_Select, ITER_CBOR, ITER_CSSPath, ITER_CSV, ITER_CSVHeaders, ITER_DefaultGraphNamespaces, ITER_for, ITER_GeoJSON, ITER_HTTPGet, ITER_JSONListKeys, ITER_JSONPath, ITER_JSONSurfer, ITER_MQTTSubscribe, ITER_regex, ITER_Split, ITER_SQL, ITER_WebSocket, ITER_XPath, IteratorFunctionBase, IteratorFunctionBase0, IteratorFunctionBase1, IteratorFunctionBase2, IteratorFunctionBase3, IteratorFunctionBase4, IteratorFunctionBase5, IteratorStreamFunctionBase, IteratorStreamFunctionBase0, IteratorStreamFunctionBase1, IteratorStreamFunctionBase2, IteratorStreamFunctionBase3, IteratorStreamFunctionBase4, IteratorStreamFunctionBase5, SPARQLExtIteratorFunction

public interface IteratorFunction

The interface of SPARQL-Generate iterator functions. SPARQL-Generate iterators are similar to SPARQL functions, except they return a list of list of RDF terms or SPARQL variables.

Method Summary

Modifier and Type	Method	Description
void	build(ExprList args)	Called during query plan construction immediately after the construction of the extension instance.
void	exec(Binding binding, ExprList args, FunctionEnv env, Consumer<List<List<NodeValue>>> nodeValuesStream)	Test a list of values - argument will not be null but may have the wrong number of arguments.

Method Detail

build

void build(ExprList args)

Called during query plan construction immediately after the construction of the extension instance. Can throw ExprBuildException if something is wrong (like wrong number of arguments).

Parameters:

args - The parsed arguments

exec

void exec(Binding binding,
          ExprList args,
          FunctionEnv env,
          Consumer<List<List<NodeValue>>> nodeValuesStream)

Test a list of values - argument will not be null but may have the wrong number of arguments. FunctionBase provides a more convenient way to implement a function. Can throw ExprEvalsException if something goes wrong.

Parameters:

binding - The current solution

args - A list of unevaluated expressions

env - The execution context

nodeValuesStream - where to emit new values