Examples of net.sf.saxon.om.DocumentInfo

net.sf.saxon.om.DocumentInfo
This interface represents a document node as defined in the XPath 2.0 data model. It extends NodeInfo, which is used to represent any node. Every document node must be an instance of DocumentInfo.
The interface supports two methods in addition to those for NodeInfo: one to find elements given their ID value, and one to locate unparsed entities. In addition, document nodes have an important property that is not true of nodes in general: two distinct Java DocumentInfo objects never represent the same document node. So the Java "==" operator returns the same result as the {@link NodeInfo#isSameNodeInfo}method.
This interface is part of the Saxon public API, and as such (from Saxon8.4 onwards) those methods that form part of the stable public API are labelled with a JavaDoc "since" tag to indicate when they were added to the product. @author Michael H. Kay @since 8.4

                if (source == null) {
                    // indicate it was not possible to convert to a Source type
                    throw new NoTypeConversionAvailableException(body, Source.class);
                }


                DocumentInfo doc = getStaticQueryContext().buildDocument(source);
                dynamicQueryContext.setContextItem(doc);
            } finally {
                // can deal if is is null
                IOHelper.close(is);
            }

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        } else {
            Source source = in.getBody(Source.class);
            if (source == null) {
                source = converter.toSource(converter.createDocument());
            }
            DocumentInfo doc = getStaticQueryContext().buildDocument(source);
            dynamicQueryContext.setContextItem(doc);
        }
        
        configureQuery(dynamicQueryContext, exchange);
        // call the reset if the in message body is StreamCache

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        Source source = exchange.getIn().getBody(Source.class);
        if (source == null) {
            source = converter.toSource(converter.createDocument());
        }


        DocumentInfo doc = getStaticQueryContext().buildDocument(source);
        dynamicQueryContext.setContextItem(doc);
        configureQuery(dynamicQueryContext, exchange);
        return dynamicQueryContext;
    }

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                } else {
                    System.err.println("Source document supplied, but query does not access the context item");
                }
            }
            if (sourceInput != null) {
                DocumentInfo doc = config.buildDocument(sourceInput);
                dynamicEnv.setContextItem(doc);
            }
        }
    }

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    protected void runQuery(XQueryExpression exp, DynamicQueryContext dynamicEnv,
                            OutputStream destination, Properties outputProps)
            throws XPathException, IOException {
        if (wrap && !pullMode) {
            SequenceIterator results = exp.iterator(dynamicEnv);
            DocumentInfo resultDoc = QueryResult.wrap(results, config);
            QueryResult.serialize(resultDoc,
                    new StreamResult(destination),
                    outputProps);
            destination.close();
        } else if (pullMode) {

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                return new QNameValue(q.getPrefix(), q.getNamespaceURI(), q.getLocalPart(),
                        BuiltInAtomicType.QNAME, null);
            } else if (value instanceof Node) {
                //return (Item)(new DOMObjectModel().convertObjectToXPathValue(value, config));
                DOMObjectModel model = new DOMObjectModel();
                DocumentInfo wrapper = model.wrapDocument(value, "", config);
                NodeInfo node = model.wrapNode(wrapper, value);
                return node;
            } else if (value instanceof Source) {
                // Saxon extension to the XQJ specification
                Builder b = new TinyBuilder();

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    * the transformation of the constructed document
    */


    public void endDocument() throws SAXException {
        super.endDocument();
        DocumentInfo doc = (DocumentInfo)builder.getCurrentRoot();
        if (doc==null) {
            throw new SAXException("No source document has been built");
        }


        try {

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      * @since DOM Level 2
      */


     public Element getElementById(String elementId) {
         // Defined on Document node; but we support it on any node.
         DocumentInfo doc = node.getDocumentRoot();
         if (doc == null) {
             return null;
         }
         return (Element)wrap(doc.selectID(elementId));
     }

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    public boolean matches(NodeInfo e, XPathContext context) throws XPathException {
        if (e.getNodeKind() != Type.ELEMENT) {
            return false;
        }
        DocumentInfo doc = e.getDocumentRoot();
        if (doc==null) {
            return false;
        }
        AtomicValue idValue = (AtomicValue)idExpression.evaluateItem(context);
        if (idValue == null) {
            return false;
        }
        String ids = idValue.getStringValue();
        if (ids.indexOf(' ') < 0 &&
                ids.indexOf(0x09) < 0 &&
                ids.indexOf(0x0a) < 0 &&
                ids.indexOf(0x0c) < 0) {
            NodeInfo element = doc.selectID(ids);
            if (element==null) return false;
            return (element.isSameNodeInfo(e));
        } else {
            StringTokenizer tokenizer = new StringTokenizer(ids, " \t\n\r", false);
            while (tokenizer.hasMoreElements()) {
                String id = (String)tokenizer.nextElement();
                NodeInfo element = doc.selectID(id);
                if (element != null && e.isSameNodeInfo(element)) {
                    return true;
                }
            }
            return false;

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        Item current = context.getContextItem();
        if (current==null) {
            dynamicError("Finding root of tree: the context item is undefined", "XPDY0002", context);
        }
        if (current instanceof NodeInfo) {
            DocumentInfo doc = ((NodeInfo)current).getDocumentRoot();
            if (doc==null) {
                dynamicError("The root of the tree containing the context item is not a document node", "XPDY0050", context);
            }
            return doc;
        }

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