Examples of org.eclipse.persistence.oxm.NamespaceResolver

org.eclipse.persistence.oxm.NamespaceResolver

It is common for an XML document to include one or more namespaces. TopLink supports this using its NamespaceResolver. The namespace resolver maintains pairs of namespace prefixes and URIs. TopLink uses these prefixes in conjunction with the XPath statements you specify on EIS mappings to XML records and XML mappings.
Although TopLink captures namespace prefixes in the XPath statements for mappings (if applicable), the input document is not required to use the same namespace prefixes. TopLink will use the namespace prefixes specified in the mapping when creating new documents.
Code Sample
NamespaceResolver resolver = new NamespaceResolver(); resolver.put( "ns", "urn:namespace-example"); XMLDescriptor descriptor = new XMLDescriptor(); descriptor.setJavaClass(Customer.class); descriptor.setDefaultRootElement("ns:customer"); descriptor.setNamespaceResolver(resolver); XMLDirectMapping mapping = new XMLDirectMapping(); mapping.setAttributeName("id"); mapping.setXPath("ns:id/text()"); descriptor.addMapping(mapping); @see org.eclipse.persistence.oxm.XMLDescriptor @see org.eclipse.persistence.eis.EISDescriptor

     */
    protected QName getDefaultRootElementAsQName(XMLDescriptor desc, String qualifiedTableName) {
        QName qName = null;
        int idx = qualifiedTableName.indexOf(XMLConstants.COLON);
        String localName = qualifiedTableName.substring(idx + 1);
        NamespaceResolver nsResolver = desc.getNamespaceResolver();
        if (nsResolver == null) {
            qName = new QName(localName);
        } else if (idx > -1) {
            String prefix = qualifiedTableName.substring(0, idx);
            String uri = nsResolver.resolveNamespacePrefix(prefix);
            qName = new QName(uri, localName);
        } else {
            if (nsResolver.getDefaultNamespaceURI() != null) {
                qName = new QName(nsResolver.getDefaultNamespaceURI(), localName);
            } else {
                qName = new QName(localName);
            }
        }
        return qName;

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        return fragment;
    }
    private XPathFragment openGroupingElementsForQName(QName fieldValue, MarshalRecord marshalRecord) {
        XPathFragment xPathFragment = null;
        ArrayList<XPathNode> groupingElements = marshalRecord.getGroupingElements();
        NamespaceResolver namespaceResolver = marshalRecord.getNamespaceResolver();
        if((fieldValue.getNamespaceURI() == null || fieldValue.getNamespaceURI().equals("")) && marshalRecord.getNamespaceResolver().getDefaultNamespaceURI() != null) {
            //In this case, the last grouping element may need to have a new prefix generated. 
            for (int x = 0, groupingElementsSize = groupingElements.size(); x < groupingElementsSize; x++) {
                XPathNode xPathNode = groupingElements.get(x);
                xPathFragment = xPathNode.getXPathFragment();
                if(x == (groupingElements.size() - 1) && namespaceResolver.getDefaultNamespaceURI().equals(xPathFragment.getNamespaceURI()) && xPathFragment.getPrefix() == null) {
                    String prefix = namespaceResolver.generatePrefix();
                    String xPath = prefix + ":" + xPathFragment.getShortName(); 
                    XPathFragment newFragment = new XPathFragment(xPath);
                    newFragment.setNamespaceURI(namespaceResolver.getDefaultNamespaceURI());
                    marshalRecord.openStartElement(newFragment, namespaceResolver);
                    marshalRecord.attribute(XMLConstants.XMLNS_URL, prefix, XMLConstants.XMLNS + ":" + prefix, namespaceResolver.getDefaultNamespaceURI());
                    marshalRecord.predicateAttribute(xPathFragment, namespaceResolver);
                    xPathFragment = newFragment;
                } else {
                    marshalRecord.openStartElement(xPathFragment, namespaceResolver);
                    marshalRecord.predicateAttribute(xPathFragment, namespaceResolver);

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        if (!cp.hasNext(iter)) {
            return false;
        }
        XPathFragment groupingElements = marshalRecord.openStartGroupingElements(namespaceResolver);
        List extraNamespaces = new ArrayList();
        NamespaceResolver nr = marshalRecord.getNamespaceResolver();
        while (cp.hasNext(iter)) {
            Map.Entry entry = (Map.Entry)cp.nextEntry(iter, session);
            Object key = entry.getKey();
            if (key instanceof QName) {
                QName name = (QName) key;
                String value = entry.getValue().toString();


                String qualifiedName = name.getLocalPart();
                if (nr != null) {
                    String prefix = nr.resolveNamespaceURI(name.getNamespaceURI());
                    if ((prefix != null) && prefix.length() > 0) {
                        qualifiedName = prefix + XMLConstants.COLON+ qualifiedName;
                    } else if (name.getNamespaceURI() != null && name.getNamespaceURI().length() > 0) {
                        String generatedPrefix = nr.generatePrefix();
                        qualifiedName = generatedPrefix + XMLConstants.COLON + qualifiedName;
                        nr.put(generatedPrefix, name.getNamespaceURI());
                        extraNamespaces.add(generatedPrefix);
                        marshalRecord.attribute(XMLConstants.XMLNS_URL, generatedPrefix, XMLConstants.XMLNS + XMLConstants.COLON + generatedPrefix, name.getNamespaceURI());
                    }
                }
                marshalRecord.attribute(name.getNamespaceURI(), name.getLocalPart(), qualifiedName, value);

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                if (!isXMLRoot) {
                    if ((null == xmlDescriptor.getDefaultRootElement()) && (node.getNodeType() == Node.ELEMENT_NODE) && (xmlDescriptor.getSchemaReference() != null) && (xmlDescriptor.getSchemaReference().getType() == XMLSchemaReference.COMPLEX_TYPE)) {
                        Attr typeAttr = ((Element) node).getAttributeNodeNS(XMLConstants.SCHEMA_INSTANCE_URL, XMLConstants.SCHEMA_TYPE_ATTRIBUTE);
                        if (typeAttr == null) {
                            NamespaceResolver namespaceResolver = xmlDescriptor.getNamespaceResolver();
                            String xsiPrefix = null;
                            if (null == namespaceResolver) {
                                namespaceResolver = new NamespaceResolver();
                                xmlDescriptor.setNamespaceResolver(namespaceResolver);
                            } else {
                                xsiPrefix = namespaceResolver.resolveNamespaceURI(XMLConstants.SCHEMA_INSTANCE_URL);
                            }


                            if (null == xsiPrefix) {
                                xsiPrefix = namespaceResolver.generatePrefix(XMLConstants.SCHEMA_INSTANCE_PREFIX);
                            }


                            String value = xmlDescriptor.getSchemaReference().getSchemaContext();


                            ((Element) node).setAttributeNS(XMLConstants.XMLNS_URL, XMLConstants.XMLNS + XMLConstants.COLON + xsiPrefix, XMLConstants.SCHEMA_INSTANCE_URL);

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        if (getAttachmentMarshaller() != null) {
            marshalRecord.setXOPPackage(getAttachmentMarshaller().isXOPPackage());
        }


        addDescriptorNamespacesToXMLRecord(descriptor, marshalRecord);
        NamespaceResolver nr = marshalRecord.getNamespaceResolver();
        XMLRoot root = null;
        if(isXMLRoot) {
            root = (XMLRoot)object;
        }
        marshalRecord.beforeContainmentMarshal(object);
        if (!isFragment()) {
            String encoding = getEncoding();
            String version = DEFAULT_XML_VERSION;
            if (!isXMLRoot) {
                marshalRecord.setLeafElementType(descriptor.getDefaultRootElementType());
            } else {
                if (root.getEncoding() != null) {
                    encoding = root.getEncoding();
                }
                if (root.getXMLVersion() != null) {
                    version = root.getXMLVersion();
                }
            }
            marshalRecord.startDocument(encoding, version);
        }
        if(isXMLRoot) {
            if(root.getObject() instanceof Node) {
                marshalRecord.node((Node)root.getObject(), new NamespaceResolver());
                marshalRecord.endDocument();
                return;
            }
        }
        XPathFragment rootFragment = buildRootFragment(object, descriptor, isXMLRoot, marshalRecord);
        
        String schemaLocation = getSchemaLocation();
        String noNsSchemaLocation = getNoNamespaceSchemaLocation();
        boolean isNil = false;
        if (isXMLRoot) {
            object = root.getObject();
            if (root.getSchemaLocation() != null) {
                schemaLocation = root.getSchemaLocation();
            }
            if (root.getNoNamespaceSchemaLocation() != null) {
                noNsSchemaLocation = root.getNoNamespaceSchemaLocation();
            }
            marshalRecord.setLeafElementType(root.getSchemaType());
            isNil = root.isNil();
        }
           
        String xsiPrefix = null;
        if ((null != getSchemaLocation()) || (null != getNoNamespaceSchemaLocation()) || (isNil)) {
            xsiPrefix = nr.resolveNamespaceURI(XMLConstants.SCHEMA_INSTANCE_URL);
            if (null == xsiPrefix) {
                xsiPrefix = XMLConstants.SCHEMA_INSTANCE_PREFIX;
                nr.put(XMLConstants.SCHEMA_INSTANCE_PREFIX, XMLConstants.SCHEMA_INSTANCE_URL);
            }
        }        


        TreeObjectBuilder treeObjectBuilder = null;
        if (descriptor != null) {
          treeObjectBuilder = (TreeObjectBuilder) descriptor.getObjectBuilder();     
        }
        if(session == null){
          session = (AbstractSession) xmlContext.getSession(0);
        }
        marshalRecord.setSession(session);
        
        if (null != rootFragment) {
            marshalRecord.startPrefixMappings(nr);
            if (!isXMLRoot && descriptor.getNamespaceResolver() == null && rootFragment.hasNamespace()) {
                // throw an exception if the name has a : in it but the namespaceresolver is null
                throw XMLMarshalException.namespaceResolverNotSpecified(rootFragment.getShortName());
            }
            
            marshalRecord.openStartElement(rootFragment, nr);
            
            if (null != schemaLocation) {
                marshalRecord.attribute(XMLConstants.SCHEMA_INSTANCE_URL, XMLConstants.SCHEMA_LOCATION, xsiPrefix + XMLConstants.COLON + XMLConstants.SCHEMA_LOCATION, schemaLocation);
            }
            if (null != noNsSchemaLocation) {
                marshalRecord.attribute(XMLConstants.SCHEMA_INSTANCE_URL, XMLConstants.NO_NS_SCHEMA_LOCATION, xsiPrefix + XMLConstants.COLON + XMLConstants.NO_NS_SCHEMA_LOCATION, noNsSchemaLocation);
            }
            if (isNil) {
                marshalRecord.attribute(XMLConstants.SCHEMA_INSTANCE_URL, XMLConstants.SCHEMA_NIL_ATTRIBUTE, xsiPrefix + XMLConstants.COLON + XMLConstants.SCHEMA_NIL_ATTRIBUTE, "true");
            }


            marshalRecord.namespaceDeclarations(nr);
            
            if (descriptor != null && !isNil) {                           
              treeObjectBuilder.addXsiTypeAndClassIndicatorIfRequired(marshalRecord, descriptor, null, descriptor.getDefaultRootElementField(), root, object, isXMLRoot, true);
                treeObjectBuilder.marshalAttributes(marshalRecord, object, session);
            }
            
            marshalRecord.closeStartElement();
        }
        if (treeObjectBuilder != null && !isNil) {
            treeObjectBuilder.buildRow(marshalRecord, object, session, this, rootFragment, WriteType.UNDEFINED);
        } else if (isXMLRoot) {
            //if(null == object) {
                //marshalRecord.attribute(XMLConstants.XMLNS_URL, XMLConstants.SCHEMA_INSTANCE_PREFIX, XMLConstants.XMLNS + XMLConstants.COLON + XMLConstants.SCHEMA_INSTANCE_PREFIX, XMLConstants.SCHEMA_INSTANCE_URL);
                //marshalRecord.attribute(XMLConstants.SCHEMA_INSTANCE_URL, XMLConstants.SCHEMA_NIL_ATTRIBUTE, XMLConstants.SCHEMA_INSTANCE_PREFIX + XMLConstants.COLON + XMLConstants.SCHEMA_NIL_ATTRIBUTE, "true");
            if(object != null && !isNil) {
               if(root.getDeclaredType() != null && root.getObject() != null && root.getDeclaredType() != root.getObject().getClass()) {
                    
                  QName type = (QName)XMLConversionManager.getDefaultJavaTypes().get(object.getClass());
                      if(type != null) {
                        xsiPrefix = nr.resolveNamespaceURI(XMLConstants.SCHEMA_INSTANCE_URL);
                          if (null == xsiPrefix) {
                              xsiPrefix = XMLConstants.SCHEMA_INSTANCE_PREFIX;
                            marshalRecord.attribute(XMLConstants.XMLNS_URL, xsiPrefix, XMLConstants.XMLNS + ':' + xsiPrefix, XMLConstants.SCHEMA_INSTANCE_URL);
                          }

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            if(rootNodeType != Node.DOCUMENT_NODE && rootNodeType != Node.ELEMENT_NODE && rootNodeType != Node.DOCUMENT_FRAGMENT_NODE ) {
                throw XMLMarshalException.marshalException(null);
            }
        }
        Document document = null;
        NamespaceResolver resolver = new NamespaceResolver();
        resolver.setDOM(rootNode);
        this.copyNamespaces(descriptor.getNamespaceResolver(), resolver);
        boolean shouldCallSetAttributeNS = false;
        boolean isRootDocumentFragment = false;
        AbstractSession session = xmlContext.getSession(descriptor);
        if (xmlRow != null) {
            isRootDocumentFragment = (xmlRow.getDOM().getNodeType() == Node.DOCUMENT_FRAGMENT_NODE);
        }
        Object originalObject = object;
        if (isXMLRoot) {
            String xmlRootUri = ((XMLRoot) object).getNamespaceURI();
            String xmlRootPrefix = null;
            if (xmlRow == null) {
                String recordName = ((XMLRoot) object).getLocalName();
                if (xmlRootUri != null) {
                    xmlRootPrefix = resolver.resolveNamespaceURI(xmlRootUri);
                    if (xmlRootPrefix == null && !(xmlRootUri.equals(resolver.getDefaultNamespaceURI()))) {
                        xmlRootPrefix = resolver.generatePrefix();
                        resolver.put(xmlRootPrefix, xmlRootUri);
                        shouldCallSetAttributeNS = true;
                    }
                    if(xmlRootPrefix != null) {
                        recordName = xmlRootPrefix + XMLConstants.COLON + recordName;
                    }

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    }


    private void addSchemaLocations(Document document, AbstractSession session) {
        Element docElement = document.getDocumentElement();


        NamespaceResolver resolver = new NamespaceResolver();
        resolver.put(XMLConstants.XMLNS, XMLConstants.XMLNS_URL);
        resolver.put(XMLConstants.SCHEMA_INSTANCE_PREFIX, XMLConstants.SCHEMA_INSTANCE_URL);


        if ((getSchemaLocation() != null) || (getNoNamespaceSchemaLocation() != null)) {
            XMLField field = new XMLField("@xmlns:xsi");
            field.setNamespaceResolver(resolver);
            XPathEngine.getInstance().create(field, docElement, XMLConstants.SCHEMA_INSTANCE_URL, session);

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    }


    public Object get(DatabaseField key) {
        XMLField xmlField = this.convertToXMLField(key);
        XPathFragment lastFragment = xmlField.getLastXPathFragment();
        NamespaceResolver namespaceResolver = xmlField.getNamespaceResolver();
        String namespaceURI = XMLConstants.EMPTY_STRING;
        if (null != namespaceResolver) {
            namespaceURI = namespaceResolver.resolveNamespacePrefix(lastFragment.getPrefix());
            if (null == namespaceURI) {
                namespaceURI = XMLConstants.EMPTY_STRING;
            }
        }
        return attributes.getValue(namespaceURI, lastFragment.getLocalName());

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            topLinkProject = new Project();
            XMLLogin xmlLogin = new XMLLogin();
            xmlLogin.setEqualNamespaceResolvers(false);
            topLinkProject.setDatasourceLogin(xmlLogin);
            // 200606_changeSummary
            NamespaceResolver nr = new NamespaceResolver();
            SDOTypeHelper sdoTypeHelper = (SDOTypeHelper) aHelperContext.getTypeHelper();
            String sdoPrefix = sdoTypeHelper.getPrefix(SDOConstants.SDO_URL);
            nr.put(sdoPrefix, SDOConstants.SDO_URL);
            SDOType changeSummaryType = (SDOType) sdoTypeHelper.getType(SDOConstants.SDO_URL, SDOConstants.CHANGESUMMARY);
            changeSummaryType.getXmlDescriptor().setNamespaceResolver(nr);
            topLinkProject.addDescriptor(changeSummaryType.getXmlDescriptor());
            SDOType openSequencedType = (SDOType) aHelperContext.getTypeHelper().getType(SDOConstants.ORACLE_SDO_URL, "OpenSequencedType");
            topLinkProject.addDescriptor(openSequencedType.getXmlDescriptor());

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    public String getPrefixForNamespace(Schema schema, String URI) {
      //add Import if necessary
        Schema referencedSchema = this.getSchemaForNamespace(URI);
        addImportIfRequired(schema, referencedSchema, URI);
      
      NamespaceResolver namespaceResolver = schema.getNamespaceResolver();
        Enumeration keys = namespaceResolver.getPrefixes();
        while (keys.hasMoreElements()) {
            String next = (String) keys.nextElement();
            String nextUri = namespaceResolver.resolveNamespacePrefix(next);
            if (nextUri.equals(URI)) {
                return next;
            }
        }
        return null;

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