Examples with Expression org.exist.xquery.Expression used on opensource projects

Example 11 with Expression

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

the class FunNot method eval.

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;
    final Expression arg = getArgument(0);
    // the remaining set
    if (Type.subTypeOf(arg.returnsType(), Type.NODE) && (contextSequence == null || contextSequence.isPersistentSet()) && !Dependency.dependsOn(arg, Dependency.CONTEXT_ITEM)) {
        if (contextSequence == null || contextSequence.isEmpty()) {
            // TODO: special treatment if the context sequence is empty:
            // within a predicate, we just return the empty sequence
            // otherwise evaluate the argument and return a boolean result
            // if (inPredicate && !inWhereClause)
            // result = Sequence.EMPTY_SEQUENCE;
            // else
            result = evalBoolean(contextSequence, contextItem, arg);
        } else {
            result = contextSequence.toNodeSet().copy();
            if (inPredicate) {
                for (final SequenceIterator i = result.iterate(); i.hasNext(); ) {
                    final NodeProxy item = (NodeProxy) i.nextItem();
                    // item.addContextNode(getExpressionId(), item);
                    if (contextId != Expression.NO_CONTEXT_ID) {
                        item.addContextNode(contextId, item);
                    } else {
                        item.addContextNode(getExpressionId(), item);
                    }
                }
            }
            // evaluate argument expression
            final Sequence argSeq = arg.eval(result);
            NodeSet argSet;
            if (contextId != Expression.NO_CONTEXT_ID) {
                argSet = argSeq.toNodeSet().getContextNodes(contextId);
            } else {
                argSet = argSeq.toNodeSet().getContextNodes(getExpressionId());
            }
            result = ((NodeSet) result).except(argSet);
        }
    // case 2: simply invert the boolean value
    } else {
        return evalBoolean(contextSequence, contextItem, arg);
    }
    if (context.getProfiler().isEnabled()) {
        context.getProfiler().end(this, "", result);
    }
    return result;
}

Example 12 with Expression

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

the class QNameIndexLookup method setArguments.

/**
 * Overwritten to disable automatic type checks. We check manually.
 *
 * @see org.exist.xquery.Function#setArguments(java.util.List)
 */
public void setArguments(List<Expression> arguments) throws XPathException {
    // wrap arguments into a cardinality check, so an error will be generated if
    // one of the arguments returns an empty sequence
    Expression arg = arguments.get(0);
    arg = new DynamicCardinalityCheck(context, Cardinality.ONE_OR_MORE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "1", getSignature()));
    steps.add(arg);
    arg = arguments.get(1);
    arg = new DynamicCardinalityCheck(context, Cardinality.ONE_OR_MORE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "2", getSignature()));
    steps.add(arg);
    if (arguments.size() == 3) {
        arg = arguments.get(2);
        arg = new DynamicCardinalityCheck(context, Cardinality.ONE_OR_MORE, arg, new Error(Error.FUNC_PARAM_CARDINALITY, "3", getSignature()));
        steps.add(arg);
    }
}