Examples of net.sf.saxon.om.Item

net.sf.saxon.om.Item
An Item is an object that can occur as a member of a sequence. It corresponds directly to the concept of an item in the XPath 2.0 data model. There are two kinds of Item: atomic values, and nodes.
This interface is part of the public Saxon API. As such (starting from Saxon 8.4), methods that form part of the stable API are labelled with a JavaDoc "since" tag to identify the Saxon release at which they were introduced.
Note: there is no method getItemType(). This is to avoid having to implement it on every implementation of NodeInfo. Instead, use the static method Type.getItemType(Item). @author Michael H. Kay @since 8.4

    * Evaluate as an Item.
    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        SequenceIterator iter = operand.iterate(context);
        Item item = null;
        while (true) {
            Item nextItem = iter.next();
            if (nextItem == null) break;
            if (requiredCardinality == StaticProperty.EMPTY) {
                typeError("An empty sequence is required as the " +
                    role.getMessage(), role.getErrorCode(), context);
                return null;

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        this.context = context;
        this.currentIterator = first;
    }


    public Item next() throws XPathException {
        Item n = currentIterator.next();
        if (n == null && currentIterator==first) {
            currentIterator = second.iterate(context);
            n = currentIterator.next();
        }
        if (n == null) {

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        final XQueryExpression exp = sqc.compileQuery("for $i in 1 to 10 return ($i * $i)");


        final DynamicQueryContext dynamicContext = new DynamicQueryContext(config);
        final SequenceIterator iter = exp.iterator(dynamicContext);
        while (true) {
            Item item = iter.next();
            if (item == null) {
                break;
            }
            System.out.println(item.getStringValue());
        }


    }

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    public List evaluate() throws XPathException {
        SequenceIterator iterator = rawIterator();
        ArrayList list = new ArrayList();
        while (true) {
            Item item = iterator.next();
            if (item == null) {
                return list;
            }
            list.add(XPathEvaluator.convert(item));
        }

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    public Object evaluateSingle() throws XPathException {
        XPathContextMajor context = new XPathContextMajor(contextNode, configuration);
        context.openStackFrame(stackFrameMap);
        SequenceIterator iterator = expression.iterate(context);
        Item item = iterator.next();
        if (item == null) {
            return null;
        } else {
            return XPathEvaluator.convert(item);
        }

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        }


        // Make a copy of the context item
        SequenceIterator currentIterator = context.getCurrentIterator();
        if (currentIterator != null) {
            Item contextItem = currentIterator.current();
            c.savedXPathContext.setCurrentIterator(SingletonIterator.makeIterator(contextItem));
            // we don't save position() and last() because we have no way
            // of restoring them. So the caller must ensure that a Closure is not
            // created if the expression depends on position() or last()
        }

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        public Item next() throws XPathException {
            if (++position < reservoir.size()) {
                return (Item)reservoir.get(position);
            } else {
                Item i = inputIterator.next();
                if (i==null) {
                    state = ALL_READ;
                    position--;     // leave position at last item
                    return null;
                }

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    /**
    * Evaluate the function
    */


    public Item evaluateItem(XPathContext c) throws XPathException {
        Item arg = argument[0].evaluateItem(c);
        if (arg==null) {
            return StringValue.EMPTY_STRING;
        } else {
            return new StringValue(arg.getStringValue());
        }
    }

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    * @param context the context, to identify the context node
    */


    private boolean isLang(String arglang, XPathContext context) {


        Item current = context.getContextItem();
        if (current==null) {
            return false;
        }
        if (!(current instanceof NodeInfo)) {
            return false;

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    public SequenceIterator iterate(XPathContext context) throws XPathException {
        int m = getImplementationMethod();
        switch (m) {
            case EVALUATE_METHOD:
                Item item = evaluateItem(context);
                if (item==null) {
                    return EmptyIterator.getInstance();
                } else {
                    return SingletonIterator.makeIterator(item);
                }

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edu.cmu.cs.fusion.xml.TypeComparisonCall

net.sf.saxon.dom.DOMNodeList

net.sf.saxon.expr.AppendExpression$AppendIterator

net.sf.saxon.expr.AppendIterator

net.sf.saxon.expr.AtomicSequenceConverter

net.sf.saxon.expr.CardinalityChecker

net.sf.saxon.expr.ComputedExpression

net.sf.saxon.expr.ContextItemExpression

net.sf.saxon.expr.ContextMappingIterator

net.sf.saxon.expr.ConvertToString

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