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

Example 16 with Var

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

the class ConstructorBuilder method getConstructVars.

/**
 * Gets the set of variables that are relevant for the constructor. This method accumulates all subject,
 * predicate and object variables from the supplied statement patterns, but ignores any context variables.
 */
private Set<Var> getConstructVars(Collection<StatementPattern> statementPatterns) {
    Set<Var> vars = new LinkedHashSet<Var>(statementPatterns.size() * 2);
    for (StatementPattern sp : statementPatterns) {
        vars.add(sp.getSubjectVar());
        vars.add(sp.getPredicateVar());
        vars.add(sp.getObjectVar());
    }
    return vars;
}

Example 17 with Var

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

the class GroupBuilder method valueToVar.

public static Var valueToVar(Value theValue) {
    Var aVar = new Var("var" + cnt++, theValue);
    aVar.setAnonymous(true);
    return aVar;
}

Example 18 with Var

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

the class GroupBuilder method filter.

public GroupBuilder<T, E> filter(String theVar, Compare.CompareOp theOp, Value theValue) {
    Compare aComp = new Compare(new Var(theVar), new ValueConstant(theValue), theOp);
    mGroup.addFilter(aComp);
    return this;
}

Example 19 with Var

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

the class ContextCollector method meet.

/**
 * @inheritDoc
 */
@Override
public void meet(final Filter theFilter) throws Exception {
    theFilter.getArg().visit(this);
    if (mContexts.containsKey(theFilter.getArg())) {
        Var aCtx = mContexts.get(theFilter.getArg());
        mContexts.remove(theFilter.getArg());
        mContexts.put(theFilter, aCtx);
    }
}

Example 20 with Var

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

the class TupleExprBuilder method visit.

@Override
public Object visit(ASTPropertyListPath propListNode, Object data) throws VisitorException {
    ValueExpr subject = (ValueExpr) data;
    ValueExpr verbPath = (ValueExpr) propListNode.getVerb().jjtAccept(this, data);
    if (verbPath instanceof Var) {
        @SuppressWarnings("unchecked") List<ValueExpr> objectList = (List<ValueExpr>) propListNode.getObjectList().jjtAccept(this, null);
        Var subjVar = mapValueExprToVar(subject);
        Var predVar = mapValueExprToVar(verbPath);
        for (ValueExpr object : objectList) {
            Var objVar = mapValueExprToVar(object);
            graphPattern.addRequiredSP(subjVar, predVar, objVar);
        }
    } else {
    // path is a single IRI or a more complex path. handled by the
    // visitor.
    }
    ASTPropertyListPath nextPropList = propListNode.getNextPropertyList();
    if (nextPropList != null) {
        nextPropList.jjtAccept(this, subject);
    }
    return null;
}