lib/facete/ConstraintUtils.js
var ElementUtils = require('../sparql/ElementUtils');
var ExprVar = require('../sparql/expr/ExprVar');
var E_Lang = require('../sparql/expr/E_Lang');
var E_LangMatches = require('../sparql/expr/E_LangMatches');
var E_Regex = require('../sparql/expr/E_Regex');
var E_Equals = require('../sparql/expr/E_Equals');
var NodeValueUtils = require('../sparql/NodeValueUtils');
var ElementTriplesBlock = require('../sparql/element/ElementTriplesBlock');
var ElementsAndExprs = require('./ElementsAndExprs');
var Concept = require('../sparql/Concept');
var ConceptUtils = require('../sparql/ConceptUtils');
var ConstraintUtils = {
createConstraintExists: function(rootFacetNode, path) {
var facetNode = rootFacetNode.forPath(path);
var elements = ElementUtils.createElementsTriplesBlock(facetNode.getTriples());
var result = new ElementsAndExprs(elements, []);
return result;
},
createConstraintLang: function(rootFacetNode, path, langStr) {
var facetNode = rootFacetNode.forPath(path);
var pathVar = facetNode.getVar();
var exprVar = new ExprVar(pathVar);
var elements = ElementUtils.createElementsTriplesBlock(facetNode.getTriples());
// NOTE Value is assumed to be node holding a string, maybe check it here
var val = langStr; //constraintSpec.getValue().getLiteralValue();
var exprs = [new E_LangMatches(new E_Lang(exprVar), val)];
var result = new ElementsAndExprs(elements, exprs);
//console.log('constraintSpec.getValue() ', constraintSpec.getValue());
return result;
},
createConstraintRegex: function(rootFacetNode, path, str) {
var facetNode = rootFacetNode.forPath(path);
var pathVar = facetNode.getVar();
var exprVar = new ExprVar(pathVar);
var elements = ElementUtils.createElementsTriplesBlock(facetNode.getTriples());
// NOTE Value is assumed to be node holding a string, maybe check it here
var val = str; //constraintSpec.getValue().getLiteralValue();
var exprs = [new E_Regex(exprVar, val, 'i')];
var result = new ElementsAndExprs(elements, exprs);
//console.log('constraintSpec.getValue() ', constraintSpec.getValue());
return result;
},
createConstraintEquals: function(rootFacetNode, path, node) {
var facetNode = rootFacetNode.forPath(path);
var pathVar = facetNode.getVar();
var exprVar = new ExprVar(pathVar);
var elements = ElementUtils.createElementsTriplesBlock(facetNode.getTriples());
//var valueExpr = constraintSpec.getValue();
var valueExpr = NodeValueUtils.makeNode(node); //constraintSpec.getValue());
var exprs = [new E_Equals(exprVar, valueExpr)];
var result = new ElementsAndExprs(elements, exprs);
//console.log('constraintSpec.getValue() ', constraintSpec.getValue());
return result;
},
createConstraintConcept: function(rootFacetNode, path, filterConcept) {
var facetNode = rootFacetNode.forPath(path);
var pathVar = facetNode.getVar();
var element = new ElementTriplesBlock(facetNode.getTriples());
var pathConcept = new Concept(element, pathVar);
var resultConcept = ConceptUtils.createCombinedConcept(pathConcept, filterConcept, true, false);
var exprs = [];
var result = new ElementsAndExprs([resultConcept.getElement()], exprs);
//console.log('constraintSpec.getValue() ', constraintSpec.getValue());
return result;
},
};
module.exports = ConstraintUtils;