Package fr.mines_stetienne.ci.sparql_generate.json

Class ITER_JSONPath

java.lang.Object
fr.mines_stetienne.ci.sparql_generate.iterator.IteratorStreamFunctionBase
fr.mines_stetienne.ci.sparql_generate.iterator.IteratorFunctionBase
fr.mines_stetienne.ci.sparql_generate.json.ITER_JSONPath
All Implemented Interfaces:
IteratorFunction
public class ITER_JSONPath extends IteratorFunctionBase
Iterator function iter:JSONPath extracts a list of sub-JSON documents of a JSON document, according to a JSONPath expression. See https://github.com/json-path/JsonPath for the JSONPath syntax specification.

See Live example

  • Param 1: (json): the URI of the JSON document (a URI), or the JSON object itself (a String);
  • Param 2: (jsonPath) the JSONPath query;
  • Param 3 .. N : (auxJsonPath ... ) other JSONPath queries, which will be executed over the results of the execution of jsonPath, and provide one result each.
The following variables may be bound:
  • Output 1: (string) sub-JSON document, encoded in a string literal;
  • Output 2 .. N-1: result of the execution of the auxiliary JsonPath queries on Output 1, encoded as a boolean, float, double, integer, string, as it best fits;
  • Output N: (integer) the position of the result in the list;
  • Output N+1: (boolean) true if this result has a next result in the list.
Output 2 and 3 can be used to generate RDF lists from the input, but the use of keyword LIST( ?var ) as the object of a triple pattern covers most cases more elegantly.
Author:
Maxime Lefrançois

  • Field Details

  • Constructor Details

    • ITER_JSONPath

      public ITER_JSONPath()

  • Method Details

    • getConf

      public static com.jayway.jsonpath.Configuration getConf()
      Get the general JSONPath JayWay configuration.
      Returns:

    • exec

      public List<List<org.apache.jena.sparql.expr.NodeValue>> exec(List<org.apache.jena.sparql.expr.NodeValue> args)
      Description copied from class: IteratorFunctionBase
      IteratorFunction call to a list of evaluated argument values.
      Specified by:
      exec in class IteratorFunctionBase
      Parameters:
      args - -
      Returns:
      -

    • checkBuild

      public void checkBuild(org.apache.jena.sparql.expr.ExprList args)
      Description copied from class: IteratorStreamFunctionBase
      Partially checks if the iterator function can be executed with the given arguments.
      Specified by:
      checkBuild in class IteratorStreamFunctionBase
      Parameters:
      args - -