Package javax.xml.stream.events

Examples of javax.xml.stream.events.XMLEvent

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  private static final QName ORM_VERSION_ATTRIBUTE_QNAME = new QName( "version" );

  @SuppressWarnings( { "unchecked" })
  private JaxbRoot unmarshal(XMLEventReader staxEventReader, final Origin origin) {
    XMLEvent event;
    try {
      event = staxEventReader.peek();
      while ( event != null && !event.isStartElement() ) {
        staxEventReader.nextEvent();
        event = staxEventReader.peek();
      }
    }
    catch ( Exception e ) {
      throw new MappingException( "Error accessing stax stream", e, origin );
    }

    if ( event == null ) {
      throw new MappingException( "Could not locate root element", origin );
    }

    final Schema validationSchema;
    final Class jaxbTarget;

    final String elementName = event.asStartElement().getName().getLocalPart();

    if ( "entity-mappings".equals( elementName ) ) {
      final Attribute attribute = event.asStartElement().getAttributeByName( ORM_VERSION_ATTRIBUTE_QNAME );
      final String explicitVersion = attribute == null ? null : attribute.getValue();
      validationSchema = resolveSupportedOrmXsd( explicitVersion );
      jaxbTarget = JaxbEntityMappings.class;
    }
    else {
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      XMLEventReader reader =
         factory.createXMLEventReader(PrivilegedFileHelper.fileInputStream(bindingsStorePath), "UTF-8");

      while (reader.hasNext())
      {
         XMLEvent event = reader.nextEvent();
         switch (event.getEventType())
         {
            case XMLStreamConstants.START_ELEMENT :
               StartElement startElement = event.asStartElement();

               Map<String, String> attr = new HashMap<String, String>();

               Iterator attributes = startElement.getAttributes();
               while (attributes.hasNext())
               {
                  Attribute attribute = (Attribute)attributes.next();
                  attr.put(attribute.getName().getLocalPart(), attribute.getValue());
               }

               String localName = startElement.getName().getLocalPart();
               if (localName.equals(REFERENCE_ELEMENT))
               {
                  String bindName = attr.get(BIND_NAME_ATTR);
                  String className = attr.get(CLASS_NAME_ATTR);
                  String factoryName = attr.get(FACTORY_ATTR);
                  String factoryLocation = attr.get(FACTORY_LOCATION_ATTR);

                  Reference reference = new Reference(className, factoryName, factoryLocation);
                  stack.push(new RefEntity(bindName, reference));
               }
               else if (localName.equals(PROPERTY_ELEMENT))
               {
                  RefEntity refEntity = stack.pop();
                  Reference reference = refEntity.getValue();

                  for (Entry<String, String> entry : attr.entrySet())
                  {
                     reference.add(new StringRefAddr(entry.getKey(), entry.getValue()));
                  }

                  refEntity.setValue(reference);
                  stack.push(refEntity);
               }

               break;
            case XMLStreamConstants.END_ELEMENT :
               EndElement endElement = event.asEndElement();
               localName = endElement.getName().getLocalPart();

               if (localName.equals(REFERENCE_ELEMENT))
               {
                  RefEntity refEntity = stack.pop();
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    }
   
    private void copyEvents(XMLEventReader reader, XMLStreamWriter writer)
        throws XMLStreamException {
        while (reader.hasNext()) {
            XMLEvent event = reader.nextEvent();
           
            switch (event.getEventType()) {
            case XMLEvent.ATTRIBUTE: {
                Attribute attr = (Attribute) event;
                QName name = attr.getName();
                writer.writeAttribute(name.getPrefix(), name.getNamespaceURI(),
                                       name.getLocalPart(), attr.getValue());
                break;
            }
            case XMLEvent.START_DOCUMENT:
            case XMLEvent.END_DOCUMENT:
                //not doing this as we're in a partial write mode
                break;

            case XMLEvent.END_ELEMENT:
                writer.writeEndElement();
                break;
           
            case XMLEvent.NAMESPACE: {
                Namespace ns = (Namespace) event;
                writer.writeNamespace(ns.getPrefix(), ns.getNamespaceURI());
                break;
            }
           
            case XMLEvent.START_ELEMENT: {
                StartElement se = event.asStartElement();
                QName n = se.getName();
                writer.writeStartElement(n.getPrefix(), n.getLocalPart(),
                                          n.getNamespaceURI());
                Iterator<?> it = se.getNamespaces();
                while (it.hasNext()) {
                    Namespace ns = (Namespace) it.next();
                    writer.writeNamespace(ns.getPrefix(), ns.getNamespaceURI());
                }
                it = se.getAttributes();
                while (it.hasNext()) {
                    Attribute attr = (Attribute) it.next();
                    QName name = attr.getName();
                    writer.writeAttribute(name.getPrefix(), name.getNamespaceURI(),
                                           name.getLocalPart(), attr.getValue());
                }
                break;
            }
          
            case XMLEvent.CHARACTERS: {
                Characters ch = event.asCharacters();
                String text = ch.getData();
                if (ch.isCData()) {
                    writer.writeCData(text);
                } else {
                    writer.writeCharacters(text);
                }
                break;
            }           
            case XMLEvent.CDATA:
                writer.writeCData(event.asCharacters().getData());
                break;
           
            case XMLEvent.COMMENT:
                writer.writeComment(((Comment) event).getText());
                break;
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        if (xmlReader == null) {
            return null;
        }
        try {
            Event event = null;
            XMLEvent xmlEvent = readToStartOfElementAtSameLevelWithName("result");
            if (xmlEvent != null) {
                event = getResultKVPairs();
            }
            return event;
        } catch (XMLStreamException e) {
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    // Reads the preview flag and field name list, and position in the middle of
    // the result element for reading actual results later.
    // Return value indicates whether the next 'results' element is found.
    boolean readIntoNextResultsElement()
            throws XMLStreamException, IOException {
        XMLEvent xmlEvent = readToStartOfElementWithName("results");
        if (xmlEvent == null) {
            return false;
        }

        if (xmlEvent != null &&
            xmlEvent.asStartElement()
                .getAttributeByName(QName.valueOf("preview"))
                .getValue()
                .equals("0") ){
            isPreview = false;
        } else {
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    }

    XMLEvent readToStartOfElementWithName(String elementName)
        throws XMLStreamException {
        while (xmlReader.hasNext()) {
            XMLEvent xmlEvent = xmlReader.nextEvent();
            int eType = xmlEvent.getEventType();
            if (eType != XMLStreamConstants.START_ELEMENT){
                continue;
            }

            StartElement startElement = xmlEvent.asStartElement();
            if(startElement
                    .getName()
                    .getLocalPart()
                    .equals(elementName)){
                return xmlEvent;
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        }
        return null;
    }

    void readToEndElementWithName(String elementName) throws XMLStreamException {
        XMLEvent xmlEvent;
        int eType;

        while (xmlReader.hasNext()) {
            xmlEvent = xmlReader.nextEvent();
            eType = xmlEvent.getEventType();
            switch (eType) {
                case XMLStreamConstants.START_ELEMENT:
                    break;
                case XMLStreamConstants.END_ELEMENT:
                    if (xmlEvent.asEndElement()
                            .getName()
                            .getLocalPart()
                            .equals(elementName)) {
                        return;
                    }
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     * @return  The start element, or {@code null} if not found.
     * @throws XMLStreamException
     */
    XMLEvent readToStartOfElementAtSameLevelWithName(String elementName)
            throws XMLStreamException {
        XMLEvent xmlEvent;
        int eType;
        int level = 0;
        while (xmlReader.hasNext()) {
            xmlEvent = xmlReader.peek();
            eType = xmlEvent.getEventType();
            switch (eType) {
                case XMLStreamConstants.START_ELEMENT:
                    if (level++ > 0){
                        break;
                    }
                    StartElement startElement = xmlEvent.asStartElement();
                    if (startElement
                            .getName()
                            .getLocalPart()
                            .equals(elementName)) {
                        xmlReader.nextEvent();
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    }

    // At the end, move off the end element of 'fieldOrder'
    private void readFieldOrderElement()
            throws IOException, XMLStreamException {
        XMLEvent xmlEvent;
        int eType;
        int level = 0;

        if (readToStartOfElementAtSameLevelWithName("fieldOrder") == null)
            return;

        while (xmlReader.hasNext()) {
            xmlEvent = xmlReader.nextEvent();
            eType = xmlEvent.getEventType();
            switch (eType) {
                case XMLStreamConstants.START_ELEMENT:
                    level++;
                    break;
                case XMLStreamConstants.END_ELEMENT:
                    if (xmlEvent.asEndElement()
                            .getName()
                            .getLocalPart()
                            .equals("fieldOrder")) {
                        return;
                    }
                    level--;
                    break;
                case XMLStreamConstants.CHARACTERS:
                    if (level == 1) {
                        fields.add(xmlEvent.asCharacters().getData());
                    }
                    break;
                default:
                    break;
            }
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    // At the end, move off the end tag of 'result'
    private Event getResultKVPairs()
            throws IOException, XMLStreamException {
       
        Event returnData = new Event();
        XMLEvent xmlEvent;
        int eType;
        String key = null;
        List<String> values = new ArrayList<String>();
        int level = 0;

        // Event results are flat, so extract k/v pairs based on XML indentation
        // level throwing away the uninteresting non-data.

        while (xmlReader.hasNext()) {
            xmlEvent = xmlReader.nextEvent();
            eType = xmlEvent.getEventType();
            switch (eType) {
                case XMLStreamConstants.START_ELEMENT:
                    final StartElement startElement = xmlEvent.asStartElement();
                    @SuppressWarnings("unchecked")
                    Iterator<Attribute> attrIttr =
                        startElement.getAttributes();
                    if (level == 0) {
                        if (attrIttr.hasNext())
                            key =  attrIttr.next().getValue();
                    } else if (level == 1 &&
                            key.equals("_raw") &&
                            startElement
                                .getName()
                                .getLocalPart()
                                .equals("v")) {
                        StringBuilder asString = new StringBuilder();
                        StringWriter asXml = new StringWriter();
                        readSubtree(startElement, asString, asXml);
                        values.add(asString.toString());
                        returnData.putSegmentedRaw(asXml.toString());
                        level--;
                    }
                    level++;
                    break;
                case XMLStreamConstants.END_ELEMENT:
                    if (xmlEvent.asEndElement()
                            .getName()
                            .getLocalPart()
                            .equals("result"))
                        return returnData;
                   
                    if (--level == 0) {
                        String[] valuesArray =
                                values.toArray(new String[values.size()]);
                        returnData.putArray(key, valuesArray);
                       
                        key = null;
                        values.clear();
                    }
                    break;
                case XMLStreamConstants.CHARACTERS:
                    if (level > 1) {
                        values.add(xmlEvent.asCharacters().getData());
                    }
                    break;
                default:
                    break;
            }
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