Examples with PathTupleExpr com.inova8.intelligentgraph.path.PathTupleExpr used on opensource projects

Example 21 with PathTupleExpr

use of com.inova8.intelligentgraph.path.PathTupleExpr in project com.inova8.intelligentgraph by peterjohnlawrence.

the class IntelligentStatementPaths method hasNext.

/**
 * Checks for next.
 *
 * @return true, if successful
 * @throws QueryEvaluationException the query evaluation exception
 */
@Override
public boolean hasNext() throws QueryEvaluationException {
    if (resultsIterator != null && resultsIterator.hasNext()) {
        return true;
    } else {
        while (pathIteration < this.sortedIterations.size()) {
            CustomQueryOptions customQueryOptions = CustomQueryOption.getCustomQueryOptions(contexts, source.getRepositoryContext().getPrefixes());
            pathTupleExpr = pathElement.pathPatternQuery(pathIteration, customQueryOptions);
            if (this.thing == null && pathTupleExpr.getBoundVariable() == null) {
                throw new QueryEvaluationException("Paths query unbound");
            } else {
                this.boundVariableName = pathTupleExpr.getBoundVariable().getName();
            }
            pathIteration++;
            this.resultsIterator = intelligentGraphConnection.getResultsIterator(source, thing, pathElement, pathTupleExpr, contexts);
            boolean hasNext = resultsIterator.hasNext();
            if (hasNext)
                return true;
        }
        return false;
    }
}