Examples of org.pdf4j.saxon.om.SequenceIterator

org.pdf4j.saxon.om.SequenceIterator
A SequenceIterator is used to iterate over any XPath 2 sequence (of values or nodes). To get the next item in a sequence, call next(); if this returns null, you've reached the end of the sequence.
A SequenceIterator keeps track of the current Item and the current position. The objects returned by the SequenceIterator will always be either nodes (class NodeInfo) or singleton values (class AtomicValue): these are represented collectively by the interface Item.
This interface forms part of the public Saxon API. The JavaDoc "since" flag is used from release 8.4 onwards to indicate methods that are considered to be a stable part of the API. Methods without a "since" flag should not be regarded as a stable part of the API.
Note that the stability of this interface applies to classes that use the interface, not to classes that implement it. The interface may be extended in future to add new methods. @author Michael H. Kay @since 8.4

    /**
    * Evaluate the function to return an iteration of selected nodes.
    */


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator seq = argument[0].iterate(context);
        AtomicValue n0 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue n = (NumericValue)n0;
        int pos = (int)n.longValue();
        if (pos < 1) {
            return seq;

View Full Code Here

    /**
    * Evaluate the function to return an iteration of selected nodes.
    */


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator seq = argument[0].iterate(context);
        AtomicValue startVal0 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue startVal = (NumericValue)startVal0;


        if (argument.length == 2) {
            long lstart;

View Full Code Here

     * Construct an node list that wraps a supplied SequenceExtent, checking that all the
     * items in the sequence are wrappers around DOM Nodes
    */


    public static DOMNodeList checkAndMake(SequenceExtent extent) throws XPathException {
        SequenceIterator it = extent.iterate();
        List list = new ArrayList(extent.getLength());
        while (true) {
            Item next = it.next();
            if (next==null) break;
            Object o = next;
            if (!(o instanceof NodeInfo)) {
                throw new XPathException("Supplied sequence contains an item that is not a Saxon NodeInfo");
            }

View Full Code Here


    public boolean matches(Value value, Configuration config) throws XPathException {
        if (!Cardinality.subsumes(cardinality, value.getCardinality())) {
            return false;
        }
        SequenceIterator iter = value.iterate();
        while (true) {
            Item item = iter.next();
            if (item == null) {
                return true;
            }
             if (!primaryType.matchesItem(item, false, config)) {
                 return false;

View Full Code Here

    * @return true if p1 and p2 contain at least one node in common (i.e. if the intersection
    * is not empty)
    */


    public static boolean hasSameNode(SequenceIterator p1, SequenceIterator p2) throws XPathException {
        SequenceIterator intersection =
            new IntersectionEnumeration(p1, p2, GlobalOrderComparer.getInstance());
        return intersection.next() != null;
    }

View Full Code Here

    public XdmValue evaluate() throws SaxonApiException {
        if (expression.isUpdateQuery()) {
            throw new IllegalStateException("Query is updating");
        }
        try {
            SequenceIterator iter = expression.iterator(context);
            ValueRepresentation result = SequenceExtent.makeSequenceExtent(iter);
            if (result instanceof NodeInfo) {
                return new XdmNode((NodeInfo)result);
            } else if (result instanceof AtomicValue) {
                return new XdmAtomicValue((AtomicValue)result);

View Full Code Here

    /**
    * Evaluate the function in a boolean context
    */


    public boolean effectiveBooleanValue(XPathContext c) throws XPathException {
        SequenceIterator iter = argument[0].iterate(c);
        boolean result = false;
        if ((iter.getProperties() & SequenceIterator.LOOKAHEAD) != 0) {
            switch (operation) {
                case EXISTS:
                    result = ((LookaheadIterator)iter).hasNext();
                    break;
                case EMPTY:
                    result = !((LookaheadIterator)iter).hasNext();
                    break;
            }
        } else {
            switch (operation) {
                case EXISTS:
                    result = iter.next() != null;
                    break;
                case EMPTY: 
                    result = iter.next() == null;
                    break;
            }
        }
        iter.close();
        return result;
    }

View Full Code Here

    /**
    * Evaluate the function to return an iteration of selected nodes.
    */


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        SequenceIterator seq = argument[0].iterate(context);
        AtomicValue n0 = (AtomicValue)argument[1].evaluateItem(context);
        NumericValue n = (NumericValue)n0;
        int pos = (int)n.longValue();
        SequenceIterator ins = argument[2].iterate(context);
        return new InsertIterator(seq, ins, pos);
    }

View Full Code Here

            switch (node.getNodeKind()) {
                case Type.DOCUMENT: {
                    if (node instanceof TinyNodeImpl) {
                        return new TinyTreeEventIterator(((TinyNodeImpl)node), pipe);
                    } else {
                        SequenceIterator content = node.iterateAxis(Axis.CHILD);
                        EventIterator contentEvents = new EventIteratorOverSequence(content);
                        return new BracketedDocumentIterator(
                                new Decomposer(contentEvents, pipe));
                    }
                }
                case Type.ELEMENT: {
                    if (node instanceof TinyNodeImpl) {
                        return new TinyTreeEventIterator(((TinyNodeImpl)node), pipe);
                    } else {
                        SequenceIterator content = node.iterateAxis(Axis.CHILD);
                        EventIterator contentEvents = new EventIteratorOverSequence(content);
                        StartElementEvent see = new StartElementEvent(pipe);
                        see.setNameCode(node.getNameCode());
                        see.setTypeCode(node.getTypeAnnotation());
                        see.setLocalNamespaces(node.getDeclaredNamespaces(null));

View Full Code Here

        XPathExpression exp = xpe.createExpression(
                "for $v in distinct-values(tokenize($in, '/')) return concat(' +', $v)");
        NodeInfo doc = xpe.getConfiguration().buildDocument(new StreamSource(new File(args[0])));
        XPathDynamicContext context = exp.createDynamicContext(doc);
        //context.setVariable(in, new StringValue(args[1]));
        SequenceIterator results = exp.iterate(context);
        while (true) {
            Item item = results.next();
            if (item == null) break;
            System.err.println(item);
        }
//        if (args.length != 2) {
//            System.err.println("format: java XPathEvaluator source.xml \"expression\"");

View Full Code Here

0 1 2 3 4 5 6

TOP

Related Classes of org.pdf4j.saxon.om.SequenceIterator

org.pdf4j.saxon.dom.DOMNodeList

org.pdf4j.saxon.evpull.Decomposer

org.pdf4j.saxon.expr.AtomicMappingExpression

org.pdf4j.saxon.expr.AtomicSequenceConverter

org.pdf4j.saxon.expr.CardinalityChecker

org.pdf4j.saxon.expr.CastableExpression

org.pdf4j.saxon.expr.ContextMappingIterator

org.pdf4j.saxon.expr.FilterIterator

org.pdf4j.saxon.expr.FirstItemExpression

org.pdf4j.saxon.expr.ForExpression

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.