Examples with ValueExpr org.eclipse.rdf4j.query.algebra.ValueExpr used on opensource projects

Example 6 with ValueExpr

use of org.eclipse.rdf4j.query.algebra.ValueExpr in project rdf4j by eclipse.

the class QueryModelBuilder method visit.

@Override
public LangMatches visit(ASTLangMatches node, Object data) throws VisitorException {
    ValueExpr tag = (ValueExpr) node.getLanguageTag().jjtAccept(this, null);
    ValueExpr range = (ValueExpr) node.getLanguageRange().jjtAccept(this, null);
    return new LangMatches(tag, range);
}

Example 7 with ValueExpr

use of org.eclipse.rdf4j.query.algebra.ValueExpr in project rdf4j by eclipse.

the class QueryModelBuilder method visit.

@Override
public Object visit(ASTWhere node, Object data) throws VisitorException {
    ValueExpr valueExpr = (ValueExpr) node.getCondition().jjtAccept(this, null);
    graphPattern.addConstraint(valueExpr);
    return null;
}

Example 8 with ValueExpr

use of org.eclipse.rdf4j.query.algebra.ValueExpr in project rdf4j by eclipse.

the class TupleExprBuilder method visit.

@Override
public If visit(ASTIf node, Object data) throws VisitorException {
    If result = null;
    if (node.jjtGetNumChildren() < 3) {
        throw new VisitorException("IF construction missing required number of arguments");
    }
    ValueExpr condition = (ValueExpr) node.jjtGetChild(0).jjtAccept(this, null);
    ValueExpr resultExpr = (ValueExpr) node.jjtGetChild(1).jjtAccept(this, null);
    ValueExpr alternative = (ValueExpr) node.jjtGetChild(2).jjtAccept(this, null);
    result = new If(condition, resultExpr, alternative);
    return result;
}

Example 9 with ValueExpr

use of org.eclipse.rdf4j.query.algebra.ValueExpr in project rdf4j by eclipse.

the class TupleExprBuilder method visit.

@Override
public BindingSet visit(ASTBindingSet node, Object data) throws VisitorException {
    @SuppressWarnings("unchecked") List<Var> vars = (List<Var>) data;
    List<String> names = new ArrayList<String>(vars.size());
    for (Var var : vars) {
        names.add(var.getName());
    }
    int numberOfBindingValues = node.jjtGetNumChildren();
    if (numberOfBindingValues != vars.size()) {
        throw new VisitorException("number of values in bindingset does not match variables in BINDINGS clause");
    }
    Value[] values = new Value[numberOfBindingValues];
    for (int i = 0; i < numberOfBindingValues; i++) {
        ValueExpr ve = (ValueExpr) node.jjtGetChild(i).jjtAccept(this, null);
        if (ve != null) {
            Value v = getValueForExpr(ve);
            values[i] = v;
        }
    }
    BindingSet result = new ListBindingSet(names, values);
    return result;
}

Example 10 with ValueExpr

use of org.eclipse.rdf4j.query.algebra.ValueExpr in project rdf4j by eclipse.

the class TupleExprBuilder method visit.

@Override
public String visit(ASTGroupCondition node, Object data) throws VisitorException {
    Group group = (Group) data;
    TupleExpr arg = group.getArg();
    Extension extension = null;
    if (arg instanceof Extension) {
        extension = (Extension) arg;
    } else {
        extension = new Extension();
    }
    String name = null;
    ValueExpr ve = (ValueExpr) node.jjtGetChild(0).jjtAccept(this, data);
    boolean aliased = false;
    if (node.jjtGetNumChildren() > 1) {
        aliased = true;
        Var v = (Var) node.jjtGetChild(1).jjtAccept(this, data);
        name = v.getName();
    } else {
        if (ve instanceof Var) {
            name = ((Var) ve).getName();
        } else {
            aliased = true;
            Var v = createAnonVar();
            name = v.getName();
        }
    }
    if (aliased) {
        ExtensionElem elem = new ExtensionElem(ve, name);
        extension.addElement(elem);
    }
    if (extension.getElements().size() > 0 && !(arg instanceof Extension)) {
        extension.setArg(arg);
        group.setArg(extension);
    }
    return name;
}