Examples of net.sf.saxon.value.SingletonItem

net.sf.saxon.value.SingletonItem
A value that is a sequence containing zero or one items. Used only for items that are not atomic values (that is, nodes, and function items)

        if (length == 0) {
            return EmptySequence.getInstance();
        } else if (length == 1) {
            Item item = (Item)list.get(0);
            if (item instanceof NodeInfo) {
                return new SingletonItem((NodeInfo)item);
            } else {
                return (AtomicValue)item;
            }
        } else {
            return new SequenceExtent(list);

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        this.config = config;
    }


    protected SaxonXQItemType(NodeInfo node) {
        config = node.getConfiguration();
        itemType = new SingletonItem(node).getItemType(config.getTypeHierarchy());
    }

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                if (href.indexOf('#') >= 0) {
                    return this;
                }
                NodeInfo item = Document.preLoadDoc(href, expressionBaseURI, config, this);
                if (item!=null) {
                    return new Literal(new SingletonItem(item));
                }
            } catch (Exception err) {
                // ignore the exception and try again at run-time
                return this;
            }

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     * @return the corresponding Value. If the value is a closure or a function call package, it will be
     * evaluated and expanded.
     */


    public GroundedValue materialize() {
        return new SingletonItem(item);
    }

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    public void process(XPathContext c) throws XPathException {
        try {
            ValueRepresentation actual = evaluateVariable(c);
            if (actual instanceof NodeInfo) {
                actual = new SingletonItem((NodeInfo) actual);
            }
            ((Value) actual).process(c);
        } catch (XPathException err) {
            err.maybeSetLocation(this);
            throw err;

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    public GroundedValue materialize() {
        if (item instanceof AtomicValue) {
            return (AtomicValue)item;
        } else {
            return new SingletonItem(item);
        }
    }

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        // Filter ns1 to select nodes that come before this one


        Expression filter = new IdentityComparison(
                                    new ContextItemExpression(),
                                    Token.PRECEDES,
                                    Literal.makeLiteral(new SingletonItem(first)));


        return new FilterIterator(ns1, filter, context);


    }

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        // Filter ns1 to select nodes that come after this one


        Expression filter = new IdentityComparison(
                new ContextItemExpression(),
                Token.FOLLOWS,
                new Literal(new SingletonItem(first)));


        return new FilterIterator(ns1, filter, context);


    }

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                if (href.indexOf('#') >= 0) {
                    return this;
                }
                NodeInfo item = Document.preLoadDoc(href, expressionBaseURI, config, this);
                if (item!=null) {
                    return new Literal(new SingletonItem(item));
                }
            } catch (Exception err) {
                // ignore the exception and try again at run-time
                return this;
            }

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Related Classes of net.sf.saxon.value.SingletonItem

net.sf.saxon.expr.VariableReference

net.sf.saxon.functions.Doc

net.sf.saxon.functions.Document

net.sf.saxon.om.ListIterator

net.sf.saxon.om.SingleNodeIterator

net.sf.saxon.om.SingletonIterator

net.sf.saxon.option.exslt.Sets

net.sf.saxon.type.ItemType

net.sf.saxon.xqj.SaxonXQItemType

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