Examples of client.net.sf.saxon.ce.om.Item

client.net.sf.saxon.ce.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

        e.setXPathContext(context);
        e.setLocator(getSourceLocator());
        if (argument.length > 2) {
            Value errorObject = ((Value)SequenceExtent.makeSequenceExtent(argument[2].iterate(context))).reduce();
            if (errorObject instanceof SingletonItem) {
                Item root = ((SingletonItem)errorObject).getItem();
                if ((root instanceof NodeInfo) && ((NodeInfo)root).getNodeKind() == Type.DOCUMENT) {
//                    XPathEvaluator xpath = new XPathEvaluator();
//                    XPathExpression exp = xpath.createExpression("/error/@module");
//                    NodeInfo moduleAtt = (NodeInfo)exp.evaluateSingle((NodeInfo)root);
//                    String module = (moduleAtt == null ? null : moduleAtt.getStringValue());

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    /**
    * Evaluate the function
    */


    public Item evaluateItem(XPathContext c) throws XPathException {
        Item item = argument[0].evaluateItem(c);
        if (item == null) {
            return StringValue.EMPTY_STRING;
        }
        final CharSequence s = item.getStringValueCS();
        switch (operation) {
            case ENCODE_FOR_URI:
                return StringValue.makeStringValue(escape(s, "-_.~"));
            case IRI_TO_URI:
                return StringValue.makeStringValue(iriToUri(s));

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    */


    public Item evaluateItem(XPathContext c) throws XPathException {
        AtomicValue sv;
        if (argument.length == 0) {
            final Item contextItem = c.getContextItem();
            if (contextItem == null) {
                dynamicError("The context item for string-length() is not set", "XPDY0002", c);
                return null;
            }
            sv = StringValue.makeStringValue(contextItem.getStringValueCS());
        } else {
            sv = (AtomicValue)argument[0].evaluateItem(c);
        }
        if (sv==null) {
            return IntegerValue.ZERO;

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    * Evaluate the function
    */


    public Item evaluateItem(XPathContext c) throws XPathException {
        try {
            Item arg = argument[0].evaluateItem(c);
            if (arg==null) {
                return StringValue.EMPTY_STRING;
            } else if (arg instanceof StringValue && ((StringValue)arg).getTypeLabel() == BuiltInAtomicType.STRING) {
                return arg;
            } else {
                return StringValue.makeStringValue(arg.getStringValueCS());
            }
        } catch (UnsupportedOperationException e) {
            // Cannot obtain the string value of a function item
            typeError(e.getMessage(), "FOTY0014", c);
            return null;

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    public Item evaluateItem(XPathContext c) throws XPathException {
        NodeInfo target;
        if (argument.length > 1) {
            target = (NodeInfo)argument[1].evaluateItem(c);
        } else {
            Item current = c.getContextItem();
            if (current==null) {
                dynamicError("The context item for lang() is undefined", "XPDY0002", c);
            }
            if (!(current instanceof NodeInfo)) {
                dynamicError("The context item for lang() is not a node", "XPDY0002", c);
            }
            target = (NodeInfo)current;
        }
        final Item arg0Val = argument[0].evaluateItem(c);
        final String testLang = (arg0Val==null ? "" : arg0Val.getStringValue());
        boolean b = isLang(testLang, target);
        return BooleanValue.get(b);
    }

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            this.inserting = (insertPosition==1);
        }




        public Item next() throws XPathException {
            Item nextItem;
            if (inserting) {
                nextItem = insert.next();
                if (nextItem == null) {
                    inserting = false;
                    nextItem = base.next();

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     */


    public Expression preEvaluate(ExpressionVisitor visitor) throws XPathException {
        try {
            XPathContext early = visitor.getStaticContext().makeEarlyEvaluationContext();
            final Item item1 = argument[1].evaluateItem(early);
            final String lex = item1.getStringValue();
            final Item item0 = argument[0].evaluateItem(early);
            String uri;
            if (item0 == null) {
                uri = "";
            } else {
                uri = item0.getStringValue();
            }
            final String[] parts = NameChecker.getQNameParts(lex);
            // The QNameValue constructor does not check the prefix
            if (parts[0].length() != 0 && !NameChecker.isValidNCName(parts[0])) {
                XPathException err = new XPathException("Malformed prefix in QName: '" + parts[0] + '\'');

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    /**
    * Iterate over the value of the expression
    */


    public SequenceIterator iterate(XPathContext context) throws XPathException {
        Item item = context.getContextItem();
        if (item==null) {
            dynamicError("The context item is not set", getErrorCodeForUndefinedContext(), context);
        }
        return SingletonIterator.makeIterator(item);
    }

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    /**
    * Evaluate the expression
    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        Item item = context.getContextItem();
        if (item==null) {
            dynamicError("The context item is not set", getErrorCodeForUndefinedContext(), context);
        }
        return item;
    }

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    }




    public TailCall processLeavingTail(XPathContext context) throws XPathException {
        SequenceReceiver out = context.getReceiver();
        Item item = select.evaluateItem(context);


        if (item == null) {
            // do nothing (XSLT 3.0)
//            // See spec bug 7624, test case copy904err
//            XPathException err = new XPathException("Context item for xsl:copy is undefined", "XTTE0945");

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Related Classes of client.net.sf.saxon.ce.om.Item

client.net.sf.saxon.ce.expr.AdjacentTextNodeMerger

client.net.sf.saxon.ce.expr.AtomicSequenceConverter

client.net.sf.saxon.ce.expr.Atomizer

client.net.sf.saxon.ce.expr.CardinalityChecker

client.net.sf.saxon.ce.expr.CastableExpression

client.net.sf.saxon.ce.expr.ContextItemExpression

client.net.sf.saxon.ce.expr.ContextMappingIterator

client.net.sf.saxon.ce.expr.Expression

client.net.sf.saxon.ce.expr.FilterIterator

client.net.sf.saxon.ce.expr.ForExpression

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