Examples with MemoryNodeSet org.exist.xquery.value.MemoryNodeSet used on opensource projects

Example 1 with MemoryNodeSet

use of org.exist.xquery.value.MemoryNodeSet in project exist by eXist-db.

the class SimpleStep method eval.

/* (non-Javadoc)
	 * @see org.exist.xquery.Expression#eval(org.exist.dom.persistent.DocumentSet, org.exist.xquery.value.Sequence, org.exist.xquery.value.Item)
	 */
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().start(this);
        context.getProfiler().message(this, Profiler.DEPENDENCIES, "DEPENDENCIES", Dependency.getDependenciesName(this.getDependencies()));
        if (contextSequence != null) {
            context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT SEQUENCE", contextSequence);
        }
        if (contextItem != null) {
            context.getProfiler().message(this, Profiler.START_SEQUENCES, "CONTEXT ITEM", contextItem.toSequence());
        }
    }
    if (contextItem != null) {
        contextSequence = contextItem.toSequence();
    }
    Sequence result = Sequence.EMPTY_SEQUENCE;
    final Sequence set = expression.eval(contextSequence);
    if (!set.isEmpty()) {
        if (set.isPersistentSet()) {
            final NodeSet nodeSet = set.toNodeSet();
            switch(axis) {
                case Constants.DESCENDANT_SELF_AXIS:
                    result = nodeSet.selectAncestorDescendant(contextSequence.toNodeSet(), NodeSet.DESCENDANT, true, contextId, true);
                    break;
                case Constants.CHILD_AXIS:
                    result = nodeSet.selectParentChild(contextSequence.toNodeSet(), NodeSet.DESCENDANT, contextId);
                    break;
                default:
                    throw new XPathException(this, "Wrong axis specified");
            }
        } else {
            final MemoryNodeSet ctxNodes = contextSequence.toMemNodeSet();
            final MemoryNodeSet nodes = set.toMemNodeSet();
            switch(axis) {
                case Constants.DESCENDANT_SELF_AXIS:
                    result = ctxNodes.selectDescendants(nodes);
                    break;
                case Constants.CHILD_AXIS:
                    result = ctxNodes.selectChildren(nodes);
                    break;
            }
        }
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}