Package fr.mines_stetienne.ci.sparql_generate.json

Class ITER_JSONSurfer

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

See Live example

The list of parameters is interpreted as follows:

  • Param 1: (json): the URI of the JSON document (a URI), or the JSON document itself (a String)
  • Param 2: the JSONPath query
  • Param 3: (integer: batch) Optional number of rows per batch (by default, all the JSON document is processed as one batch);
  • Param 4 .. N : (auxJsonPath ... ) other JSONPath queries, which will be executed over the results of the execution of jsonPath, and provide one result each.
Author:
Maxime Lefrançois, Omar Qawasmeh

  • Field Details

  • Constructor Details

    • ITER_JSONSurfer

      public ITER_JSONSurfer()

  • Method Details

    • 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 - -

    • exec

      public void exec(List<org.apache.jena.sparql.expr.NodeValue> args, Consumer<List<List<org.apache.jena.sparql.expr.NodeValue>>> collectionListNodeValue)
      Description copied from class: IteratorStreamFunctionBase
      IteratorFunction call to a list of evaluated argument values.
      Specified by:
      exec in class IteratorStreamFunctionBase
      Parameters:
      args - -
      collectionListNodeValue - - where to emit collections of nodevalues