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

Example 6 with FunctionReference

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

the class CallFunction method eval.

/* (non-Javadoc)
     * @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
     */
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    final Sequence arg0 = getArgument(0).eval(contextSequence, contextItem);
    if (arg0.getCardinality() != Cardinality.EXACTLY_ONE) {
        throw new XPathException(this, "Expected exactly one item for first argument");
    }
    final Item item0 = arg0.itemAt(0);
    if (item0.getType() != Type.FUNCTION_REFERENCE) {
        throw new XPathException(this, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
    }
    try (final FunctionReference ref = (FunctionReference) item0) {
        // pass the remaining parameters to the function call
        final List<Expression> params = new ArrayList<>(getArgumentCount() - 1);
        for (int i = 1; i < getArgumentCount(); i++) {
            params.add(getArgument(i));
        }
        ref.setArguments(params);
        ref.analyze(new AnalyzeContextInfo(this, 0));
        // Evaluate the function
        return ref.eval(contextSequence);
    }
}

Example 7 with FunctionReference

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

the class CleanupTest method resetStateOfInlineFunc.

@Test
public void resetStateOfInlineFunc() throws XMLDBException, EXistException, PermissionDeniedException, XPathException {
    final BrokerPool pool = BrokerPool.getInstance();
    final XQuery xquery = pool.getXQueryService();
    try (final DBBroker broker = pool.get(Optional.of(pool.getSecurityManager().getSystemSubject()))) {
        // execute query to get a function item
        final Sequence result = xquery.execute(broker, TEST_INLINE, Sequence.EMPTY_SEQUENCE);
        assertEquals(result.getItemCount(), 1);
        final FunctionCall call = ((FunctionReference) result.itemAt(0)).getCall();
        // closure variables are set when function item is created, but should be cleared after query
        final List<ClosureVariable> closure = call.getFunction().getClosureVariables();
        assertNull(closure);
    }
}

Example 8 with FunctionReference

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

the class ArrowOperator method eval.

@Override
public Sequence eval(Sequence contextSequence, final Item contextItem) throws XPathException {
    if (contextItem != null) {
        contextSequence = contextItem.toSequence();
    }
    contextSequence = leftExpr.eval(contextSequence);
    final FunctionReference fref;
    if (fcall != null) {
        fref = new FunctionReference(fcall);
    } else {
        final Sequence funcSeq = funcSpec.eval(contextSequence, contextItem);
        if (funcSeq.getCardinality() != Cardinality.EXACTLY_ONE) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "Expected exactly one item for the function to be called, got " + funcSeq.getItemCount() + ". Expression: " + ExpressionDumper.dump(funcSpec));
        }
        final Item item0 = funcSeq.itemAt(0);
        if (!Type.subTypeOf(item0.getType(), Type.FUNCTION_REFERENCE)) {
            throw new XPathException(this, ErrorCodes.XPTY0004, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
        }
        fref = (FunctionReference) item0;
    }
    try {
        final List<Expression> fparams = new ArrayList<>(parameters.size() + 1);
        fparams.add(new ContextParam(context, contextSequence));
        fparams.addAll(parameters);
        fref.setArguments(fparams);
        // need to create a new AnalyzeContextInfo to avoid memory leak
        // cachedContextInfo will stay in memory
        fref.analyze(new AnalyzeContextInfo(cachedContextInfo));
        // Evaluate the function
        return fref.eval(null);
    } finally {
        fref.close();
    }
}

Example 9 with FunctionReference

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

the class DynamicFunctionCall method eval.

@Override
public Sequence eval(Sequence contextSequence, Item contextItem) throws XPathException {
    context.proceed(this);
    final Sequence funcSeq = functionExpr.eval(contextSequence, contextItem);
    if (funcSeq.getCardinality() != Cardinality.EXACTLY_ONE) {
        throw new XPathException(this, ErrorCodes.XPTY0004, "Expected exactly one item for the function to be called, got " + funcSeq.getItemCount() + ". Expression: " + ExpressionDumper.dump(functionExpr));
    }
    final Item item0 = funcSeq.itemAt(0);
    if (!Type.subTypeOf(item0.getType(), Type.FUNCTION_REFERENCE)) {
        throw new XPathException(this, ErrorCodes.XPTY0004, "Type error: expected function, got " + Type.getTypeName(item0.getType()));
    }
    final FunctionReference ref = (FunctionReference) item0;
    // if the call is a partial application, create a new function
    if (isPartial) {
        try {
            final FunctionCall call = ref.getCall();
            call.setArguments(arguments);
            final PartialFunctionApplication partialApp = new PartialFunctionApplication(context, call);
            partialApp.analyze(new AnalyzeContextInfo(cachedContextInfo));
            return partialApp.eval(contextSequence, contextItem);
        } catch (final XPathException e) {
            e.setLocation(line, column, getSource());
            throw e;
        }
    } else {
        ref.setArguments(arguments);
        // need to create a new AnalyzeContextInfo to avoid memory leak
        // cachedContextInfo will stay in memory
        ref.analyze(new AnalyzeContextInfo(cachedContextInfo));
        // Evaluate the function
        try {
            return ref.eval(contextSequence);
        } catch (XPathException e) {
            if (e.getLine() <= 0) {
                e.setLocation(getLine(), getColumn(), getSource());
            }
            throw e;
        } finally {
            ref.close();
        }
    }
}

Example 10 with FunctionReference

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

the class HighlightMatches method eval.

public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
    if (args[0].isEmpty())
        return Sequence.EMPTY_SEQUENCE;
    context.pushDocumentContext();
    final Serializer serializer = context.getBroker().borrowSerializer();
    try (FunctionReference func = (FunctionReference) args[1].itemAt(0)) {
        MemTreeBuilder builder = context.getDocumentBuilder();
        NGramIndexWorker index = (NGramIndexWorker) context.getBroker().getIndexController().getWorkerByIndexId(NGramIndex.ID);
        DocumentBuilderReceiver docBuilder = new DocumentBuilderReceiver(builder);
        MatchCallback matchCb = new MatchCallback(func, docBuilder);
        ValueSequence result = new ValueSequence();
        for (SequenceIterator i = args[0].iterate(); i.hasNext(); ) {
            NodeValue v = (NodeValue) i.nextItem();
            try {
                int nodeNr = builder.getDocument().getLastNode();
                if (v.getImplementationType() == NodeValue.IN_MEMORY_NODE) {
                    ((NodeImpl) v).copyTo(context.getBroker(), docBuilder);
                } else {
                    NodeProxy p = (NodeProxy) v;
                    MatchListener ml = index.getMatchListener(context.getBroker(), p, matchCb);
                    Receiver receiver;
                    if (ml == null)
                        receiver = docBuilder;
                    else {
                        ml.setNextInChain(docBuilder);
                        receiver = ml;
                    }
                    serializer.setReceiver(receiver);
                    serializer.toReceiver((NodeProxy) v, false);
                }
                result.add(builder.getDocument().getNode(++nodeNr));
            } catch (SAXException e) {
                LOG.warn(e.getMessage(), e);
                throw new XPathException(this, e.getMessage());
            }
        }
        return result;
    } finally {
        context.getBroker().returnSerializer(serializer);
        context.popDocumentContext();
    }
}