Examples with SelectQuery org.apache.clerezza.rdf.core.sparql.query.SelectQuery used on opensource projects

Example 6 with SelectQuery

use of org.apache.clerezza.rdf.core.sparql.query.SelectQuery in project stanbol by apache.

the class ClerezzaRuleStore method getRecipe.

@Override
public Recipe getRecipe(IRI recipeID) throws NoSuchRecipeException, RecipeConstructionException {
    log.info("Called get recipe for id: " + recipeID);
    Graph recipeGraph = null;
    /**
         * Throw a NoSuchRecipeException in case of the TcManager throws a NoSuchEntityException with respect
         * to IRI representing the recipe.
         */
    try {
        recipeGraph = tcManager.getGraph(recipeID);
    } catch (NoSuchEntityException e) {
        throw new NoSuchRecipeException(recipeID.toString());
    }
    Iterator<Triple> descriptions = recipeGraph.filter(null, Symbols.description, null);
    String recipeDescription = null;
    if (descriptions != null && descriptions.hasNext()) {
        recipeDescription = descriptions.next().getObject().toString();
    }
    String query = "SELECT ?rule ?ruleName ?ruleBody ?ruleHead " + "WHERE { " + "	" + recipeID.toString() + " " + Symbols.hasRule.toString() + " ?rule . " + "	?rule " + Symbols.ruleName.toString() + " ?ruleName . " + "	?rule " + Symbols.ruleBody.toString() + " ?ruleBody . " + "	?rule " + Symbols.ruleHead.toString() + " ?ruleHead . " + "}";
    Query sparql;
    try {
        sparql = QueryParser.getInstance().parse(query);
        ResultSet resultSet = tcManager.executeSparqlQuery((SelectQuery) sparql, recipeGraph);
        StringBuilder stanbolRulesBuilder = new StringBuilder();
        boolean firstIteration = true;
        while (resultSet.hasNext()) {
            SolutionMapping solutionMapping = resultSet.next();
            RDFTerm nameResource = solutionMapping.get("ruleName");
            RDFTerm bodyResource = solutionMapping.get("ruleBody");
            RDFTerm headResource = solutionMapping.get("ruleHead");
            StringBuilder stanbolRuleBuilder = new StringBuilder();
            stanbolRuleBuilder.append(((Literal) nameResource).getLexicalForm());
            stanbolRuleBuilder.append("[");
            stanbolRuleBuilder.append(((Literal) bodyResource).getLexicalForm());
            stanbolRuleBuilder.append(" -> ");
            stanbolRuleBuilder.append(((Literal) headResource).getLexicalForm());
            stanbolRuleBuilder.append("]");
            if (!firstIteration) {
                stanbolRulesBuilder.append(" . ");
            } else {
                firstIteration = false;
            }
            String stanbolSyntax = stanbolRuleBuilder.toString();
            log.info("Rule content {}", stanbolSyntax);
            stanbolRulesBuilder.append(stanbolSyntax);
        }
        String stanbolSyntax = stanbolRulesBuilder.toString();
        RuleList ruleList = null;
        if (!stanbolSyntax.isEmpty()) {
            String namespace = recipeID.toString().substring(1, recipeID.toString().length() - 1) + "/";
            ruleList = RuleParserImpl.parse(namespace, stanbolSyntax).getRuleList();
        }
        return new RecipeImpl(recipeID, recipeDescription, ruleList);
    } catch (ParseException e) {
        throw new RecipeConstructionException(e);
    }
}