Package fr.mines_stetienne.ci.sparql_generate.xml

Class ITER_CSSPath

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.xml.ITER_CSSPath
All Implemented Interfaces:
fr.mines_stetienne.ci.sparql_generate.iterator.IteratorFunction
public class ITER_CSSPath extends fr.mines_stetienne.ci.sparql_generate.iterator.IteratorFunctionBase
Iterator function iter:CSSPath extracts parts of a HTML document, using CSS-Selector-like queries.

See Live example

  • Param 1: (html): the URI of the HTML document (a URI), or the HTML document itself (a String);
  • Param 2: (cssSelector) is the CSS Selector. See https://jsoup.org/apidocs/org/jsoup/select/Selector.html for the base syntax specification.
  • Param 3 .. N : (auxCssSelector ... ) other CSS Selectors, which will be executed over each of the results of the execution of xPath, exactly as if the binding function fun:CSSPath was applied. By default, the output is the outer HTML of the first matched element. However, two additions to the CSS Selector syntax can change this behaviour:
    • (if the selector ends with /text()) the output is the combined text of the first matched element and all its children. Whitespaces are normalized and trimmed.
    • (if the selector ends with @attributeName) the output is the value of the attribute attributeName for the first matched element.
The following variables may be bound:
  • Output 1: (string) outer HTML of the matched element;
  • Output 2 .. N-1: (string) result of the execution of the auxiliary CSS Selector queries on Output 1, encoded as literals;
  • 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 N and N+1 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.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static String
    URI
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    ITER_CSSPath()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    checkBuild​(org.apache.jena.sparql.expr.ExprList args)
     
    List<List<org.apache.jena.sparql.expr.NodeValue>>
    exec​(List<org.apache.jena.sparql.expr.NodeValue> args)
     

    Methods inherited from class fr.mines_stetienne.ci.sparql_generate.iterator.IteratorFunctionBase

    exec

    Methods inherited from class fr.mines_stetienne.ci.sparql_generate.iterator.IteratorStreamFunctionBase

    build, exec, getContext

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

    • ITER_CSSPath

      public ITER_CSSPath()

  • Method Details

    • exec

      public List<List<org.apache.jena.sparql.expr.NodeValue>> exec​(List<org.apache.jena.sparql.expr.NodeValue> args)
      Specified by:
      exec in class fr.mines_stetienne.ci.sparql_generate.iterator.IteratorFunctionBase

    • checkBuild

      public void checkBuild​(org.apache.jena.sparql.expr.ExprList args)
      Specified by:
      checkBuild in class fr.mines_stetienne.ci.sparql_generate.iterator.IteratorStreamFunctionBase