Examples with ASTPathExprUnion org.eclipse.rdf4j.query.parser.serql.ast.ASTPathExprUnion used on opensource projects

Example 1 with ASTPathExprUnion

use of org.eclipse.rdf4j.query.parser.serql.ast.ASTPathExprUnion in project rdf4j by eclipse.

the class QueryModelBuilder method visit.

@Override
public Object visit(ASTPathExprUnion node, Object data) throws VisitorException {
    Iterator<ASTPathExpr> args = node.getPathExprList().iterator();
    // Create new sub-graph pattern for optional path expressions
    TupleExpr unionExpr = parseGraphPattern(args.next()).buildTupleExpr();
    while (args.hasNext()) {
        TupleExpr argExpr = parseGraphPattern(args.next()).buildTupleExpr();
        unionExpr = new Union(unionExpr, argExpr);
    }
    graphPattern.addRequiredTE(unionExpr);
    return null;
}