Examples with Binding org.apache.jena.sparql.engine.binding.Binding used on opensource projects

Example 56 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class QueryIterDefaulting method moveToNextBinding.

@Override
protected Binding moveToNextBinding() {
    if (isFinished())
        throw new NoSuchElementException(Lib.className(this));
    if (returnDefaultObject) {
        haveReturnedSomeObject = true;
        return defaultObject;
    }
    Binding binding = null;
    if (iter != null && iter.hasNext())
        binding = iter.next();
    else {
        if (haveReturnedSomeObject)
            throw new NoSuchElementException("DefaultingIterator - without hasNext call first");
        binding = defaultObject;
    }
    haveReturnedSomeObject = true;
    return binding;
}

Example 57 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class QueryIterDistinct method hasNextBinding.

@Override
protected boolean hasNextBinding() {
    if (slot != null)
        return true;
    if (iterator != null)
        // Databag active.
        return iterator.hasNext();
    // At this point, we are currently in the initial pre-threshold mode.
    if (seen.size() < memThreshold) {
        Binding b = getInputNextUnseen();
        if (b == null)
            return false;
        seen.add(b);
        slot = b;
        return true;
    }
    // Hit the threshold.
    loadDataBag();
    // Switch to iterating from the data bag.  
    iterator = db.iterator();
    // Leave slot null.
    return iterator.hasNext();
}

Example 58 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class QueryIterDistinct method moveToNextBinding.

@Override
protected Binding moveToNextBinding() {
    if (slot != null) {
        Binding b = slot;
        slot = null;
        return b;
    }
    if (iterator != null) {
        Binding b = iterator.next();
        return b;
    }
    throw new InternalErrorException();
}

Example 59 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class QueryIterDistinctReduced method hasNextBinding.

@Override
protected final boolean hasNextBinding() {
    // Already waiting to go.
    if (slot != null)
        return true;
    // Always moves.
    for (; getInput().hasNext(); ) {
        Binding b = getInput().nextBinding();
        // Hide unnamed and internal variables.
        // Don't need to worry about rename scope vars 
        // (they are projected away in sub-SELECT ?var { ... }) 
        b = new BindingProjectNamed(b);
        if (isFreshSighting(b)) {
            slot = b;
            return true;
        }
    }
    return false;
}

Example 60 with Binding

use of org.apache.jena.sparql.engine.binding.Binding in project jena by apache.

the class QueryIterDistinctReduced method moveToNextBinding.

@Override
protected final Binding moveToNextBinding() {
    Binding r = slot;
    slot = null;
    return r;
}