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

    public static DOMNodeList checkAndMake(SequenceExtent extent) throws XPathException {
        // NOTE: method currently unused
        SequenceIterator it = extent.iterate();
        List<Node> list = new ArrayList<Node>(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");
            }

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        public void process(XPathContext context) throws XPathException {
            // Prepare the SQL statement (only do this once)


            Controller controller = context.getController();
            Item conn = arguments[CONNECTION].evaluateItem(context);
            if (!(conn instanceof ObjectValue && ((ObjectValue)conn).getObject() instanceof Connection)) {
                XPathException de = new XPathException("Value of connection expression is not a JDBC Connection");
                de.setXPathContext(context);
                throw de;
            }

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        e.setXPathContext(context);
        e.setLocator(this);
        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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        public int computeCardinality() {
            return StaticProperty.ALLOWS_ZERO_OR_ONE;
        }


        public Item evaluateItem(XPathContext context) throws XPathException {
            Item conn = arguments[CONNECTION].evaluateItem(context);
            if (!(conn instanceof ObjectValue && ((ObjectValue)conn).getObject() instanceof Connection) ) {
                dynamicError("Value of connection expression is not a JDBC Connection", SaxonErrorCode.SXSQ0001, context);
            }
            Connection connection = (Connection)((ObjectValue)conn).getObject();
        try {

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        public Item evaluateItem(XPathContext context) throws XPathException {


            // Prepare the SQL statement (only do this once)


            Item conn = arguments[CONNECTION].evaluateItem(context);
            if (!(conn instanceof ObjectValue && ((ObjectValue)conn).getObject() instanceof Connection) ) {
                dynamicError("Value of connection expression is not a JDBC Connection", SaxonErrorCode.SXSQ0001, context);
            }
            Connection connection = (Connection)((ObjectValue)conn).getObject();
            PreparedStatement ps = null;

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    /**
    * Evaluate as an Item.
    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        Item item = operand.evaluateItem(context);
        if (item==null) return null;
        testConformance(item, context);
        return item;
    }

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    /**
    * Evaluate as an Item. This should only be called if the expression has cardinality zero-or-one
    */


    public Item evaluateItem(XPathContext context) throws XPathException {
        Item item = operand.evaluateItem(context);
        if (item==null) return null;
        return promote(((AtomicValue)item), context);
    }

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        public Item evaluateItem(XPathContext context) throws XPathException {


            // Prepare the SQL statement (only do this once)


            Item conn = arguments[CONNECTION].evaluateItem(context);
            if (!(conn instanceof ObjectValue && ((ObjectValue)conn).getObject() instanceof Connection) ) {
                dynamicError("Value of connection expression is not a JDBC Connection", SaxonErrorCode.SXSQ0001, context);
            }
            Connection connection = (Connection)((ObjectValue)conn).getObject();
            PreparedStatement ps = null;

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    public List evaluate(XPathDynamicContext context) throws XPathException {
        SequenceIterator iter = expression.iterate(context.getXPathContextObject());
        List list = new ArrayList(20);
        while (true) {
            Item item = iter.next();
            if (item == null) {
                break;
            }
            list.add(item);
        }

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        } else {
            origin = evaluator.getConfiguration().buildDocument(source);
        }
        XPathDynamicContext context = createDynamicContext(origin);
        SequenceIterator iterator = iterate(context);
        Item item = iterator.next();
        if (item == null) {
            return null;
        } else {
            return Value.convertToJava(item);
        }

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edu.cmu.cs.fusion.xml.TypeComparisonCall

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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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