domdocument.java

gcc的组建

    Node root = getDocumentElement();
    return (root == null) ? false : root.isDefaultNamespace(namespaceURI);
  }

  public String lookupNamespaceURI(String prefix)
  {
    Node root = getDocumentElement();
    return (root == null) ? null : root.lookupNamespaceURI(prefix);
  }

  public String getBaseURI()
  {
    return getDocumentURI();
    /*
    Node root = getDocumentElement();
    if (root != null)
      {
        NamedNodeMap attrs = root.getAttributes();
        Node xmlBase = attrs.getNamedItemNS(XMLConstants.XML_NS_URI, "base");
        if (xmlBase != null)
          {
            return xmlBase.getNodeValue();
          }
      }
    return systemId;
    */
  }
  
  public String getDocumentURI()
  {
    return systemId;
  }

  public void setDocumentURI(String documentURI)
  {
    systemId = documentURI;
  }

  public Node adoptNode(Node source)
  {
    int sourceNodeType = source.getNodeType();
    switch (sourceNodeType)
      {
      case DOCUMENT_NODE:
      case DOCUMENT_TYPE_NODE:
        throw new DomDOMException(DOMException.NOT_SUPPORTED_ERR);
      case ENTITY_NODE:
      case NOTATION_NODE:
        throw new DomDOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR);
      }
    if (source instanceof DomNode)
      {
        // GNU native
        DomNode src = (DomNode) source;
        DomNode dst = src;
        if (dst.parent != null)
          {
            dst = (DomNode) dst.cloneNode(true);
          }
        dst.setOwner(this);
        src.notifyUserDataHandlers(UserDataHandler.NODE_ADOPTED, src, dst);
        return dst;
      }
    else
      {
        // Some other implementation
        Node dst = null;
        switch (sourceNodeType)
          {
          case Node.ATTRIBUTE_NODE:
              {
                Attr src = (Attr) source;
                String nodeName = src.getNodeName();
                String localName = src.getLocalName();
                String namespaceUri = src.getNamespaceURI();
                dst = (localName == null) ?
                  createAttribute(nodeName) :
                  createAttributeNS(namespaceUri, nodeName);
                adoptChildren(src, dst);
                break;
              }
          case Node.CDATA_SECTION_NODE:
              {
                CDATASection src = (CDATASection) source;
                dst = createCDATASection(src.getData());
                break;
              }
          case Node.COMMENT_NODE:
              {
                Comment src = (Comment) source;
                dst = createComment(src.getData());
                break;
              }
          case Node.DOCUMENT_FRAGMENT_NODE:
              {
                DocumentFragment src = (DocumentFragment) source;
                dst = createDocumentFragment();
                adoptChildren(src, dst);
                break;
              }
          case Node.ELEMENT_NODE:
              {
                Element src = (Element) source;
                String nodeName = src.getNodeName();
                String localName = src.getLocalName();
                String namespaceUri = src.getNamespaceURI();
                dst = (localName == null) ?
                  createElement(nodeName) :
                  createElementNS(namespaceUri, nodeName);
                adoptAttributes(src, dst);
                adoptChildren(src, dst);
                break;
              }
          case Node.ENTITY_REFERENCE_NODE:
              {
                EntityReference src = (EntityReference) source;
                dst = createEntityReference(src.getNodeName());
                adoptChildren(src, dst);
                break;
              }
          case Node.PROCESSING_INSTRUCTION_NODE:
              {
                ProcessingInstruction src = (ProcessingInstruction) source;
                dst = createProcessingInstruction(src.getTarget(),
                                                  src.getData());
                break;
              }
          case Node.TEXT_NODE:
              {
                Text src = (Text) source;
                dst = createTextNode(src.getData());
                break;
              }
          }
        return dst;
      }
  }

  void adoptChildren(Node src, Node dst)
  {
    Node node = src.getFirstChild();
    while (node != null)
      {
        Node next = node.getNextSibling();
        dst.appendChild(adoptNode(node));
        node = next;
      }
  }

  void adoptAttributes(Node src, Node dst)
  {
    NamedNodeMap srcAttrs = src.getAttributes();
    NamedNodeMap dstAttrs = dst.getAttributes();
    int len = srcAttrs.getLength();
    for (int i = 0; i < len; i++)
      {
        Node node = srcAttrs.item(i);
        String localName = node.getLocalName();
        if (localName == null)
          {
            dstAttrs.setNamedItem(adoptNode(node));
          }
        else
          {
            dstAttrs.setNamedItemNS(adoptNode(node));
          }
      }
  }

  public DOMConfiguration getDomConfig()
  {
    if (config == null)
      {
        config = new DomDocumentConfiguration();
      }
    return config;
  }

  public void normalizeDocument()
  {
    boolean save = building;
    building = true;
    normalizeNode(this);
    building = save;
  }

  void normalizeNode(DomNode node)
  {
    node.normalize();
    if (config != null)
      {
        switch (node.nodeType)
          {
          case CDATA_SECTION_NODE:
            if (!config.cdataSections)
              {
                // replace CDATA section with text node
                Text text = createTextNode(node.getNodeValue());
                node.parent.insertBefore(text, node);
                node.parent.removeChild(node);
                // merge adjacent text nodes
                String data = text.getWholeText();
                node = (DomNode) text.replaceWholeText(data);
              }
            else if (config.splitCdataSections)
              {
                String value = node.getNodeValue();
                int i = value.indexOf("]]>");
                while (i != -1)
                  {
                    Node node2 = createCDATASection(value.substring(0, i));
                    node.parent.insertBefore(node2, node);
                    value = value.substring(i + 3);
                    node.setNodeValue(value);
                    i = value.indexOf("]]>");
                  }
              }
            break;
          case COMMENT_NODE:
            if (!config.comments)
              {
                node.parent.removeChild(node);
              }
            break;
          case TEXT_NODE:
            if (!config.elementContentWhitespace &&
                ((Text) node).isElementContentWhitespace())
              {
                node.parent.removeChild(node);
              }
            break;
          case ENTITY_REFERENCE_NODE:
            if (!config.entities)
              {
                for (DomNode ctx = node.first; ctx != null; )
                  {
                    DomNode ctxNext = ctx.next;
                    node.parent.insertBefore(ctx, node);
                    ctx = ctxNext;
                  }
                node.parent.removeChild(node);
              }
            break;
          case ELEMENT_NODE:
            if (!config.namespaceDeclarations)
              {
                DomNamedNodeMap attrs =
                  (DomNamedNodeMap) node.getAttributes();
                boolean aro = attrs.readonly;
                attrs.readonly = false; // Ensure we can delete if necessary
                int len = attrs.getLength();
                for (int i = 0; i < len; i++)
                  {
                    Node attr = attrs.item(i);
                    String namespace = attr.getNamespaceURI();
                    if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespace))
                      {
                        attrs.removeNamedItemNS(namespace,
                                                attr.getLocalName());
                        i--;
                        len--;
                      }
                  }
                attrs.readonly = aro;
              }
            break;
          }
      }
    for (DomNode ctx = node.first; ctx != null; )
      {
        DomNode ctxNext = ctx.next;
        normalizeNode(ctx);
        ctx = ctxNext;
      }
  }
  
  public Node renameNode(Node n, String namespaceURI, String qualifiedName)
    throws DOMException
  {
    if (n instanceof DomNsNode)
      {
        DomNsNode src = (DomNsNode) n;
        if (src == null)
          {
            throw new DomDOMException(DOMException.NOT_FOUND_ERR);
          }
        if (src.owner != this)
          {
            throw new DomDOMException(DOMException.WRONG_DOCUMENT_ERR,
                                      null, src, 0);
          }
        boolean xml11 = "1.1".equals(version);
        checkName(qualifiedName, xml11);
        int ci = qualifiedName.indexOf(':');
        if ("".equals(namespaceURI))
          {
            namespaceURI = null;
          }
        if (namespaceURI != null)
          {
            checkNCName(qualifiedName, xml11);
            String prefix = (ci == -1) ? "" :
              qualifiedName.substring(0, ci);
            if (XMLConstants.XML_NS_PREFIX.equals(prefix) &&
                !XMLConstants.XML_NS_URI.equals(namespaceURI))
              {
                throw new DomDOMException(DOMException.NAMESPACE_ERR,
                                "xml namespace must be " +
                                XMLConstants.XML_NS_URI, src, 0);
              }
            else if (src.nodeType == ATTRIBUTE_NODE &&
                     (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix) ||
                      XMLConstants.XMLNS_ATTRIBUTE.equals(qualifiedName)) &&
                     !XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI))
              {
                throw new DomDOMException(DOMException.NAMESPACE_ERR,
                                "xmlns namespace must be " +
                                XMLConstants.XMLNS_ATTRIBUTE_NS_URI, src, 0);
              }
            if (XMLConstants.XML_NS_URI.equals(namespaceURI) &&
                !XMLConstants.XML_NS_PREFIX.equals(prefix))
              {
                throw new DomDOMException(DOMException.NAMESPACE_ERR,
                                "xml namespace must be " +
                                XMLConstants.XML_NS_URI, src, 0);
              }
            else if (src.nodeType == ATTRIBUTE_NODE &&
                     XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(namespaceURI) &&
                     !(XMLConstants.XMLNS_ATTRIBUTE.equals(prefix) ||
                       XMLConstants.XMLNS_ATTRIBUTE.equals(qualifiedName)))
              {
                throw new DomDOMException(DOMException.NAMESPACE_ERR,
                                "xmlns namespace must be " +
                                XMLConstants.XMLNS_ATTRIBUTE_NS_URI, src, 0);
              }
                
          }
        src.setNodeName(qualifiedName);
        src.setNamespaceURI(namespaceURI);
        src.notifyUserDataHandlers(UserDataHandler.NODE_RENAMED, src, src);
        // TODO MutationNameEvents
        // DOMElementNameChanged or DOMAttributeNameChanged
        return src;
      }
    throw new DomDOMException(DOMException.NOT_SUPPORTED_ERR, null, n, 0);
  }

  // -- XPathEvaluator --
  
  public XPathExpression createExpression(String expression,
                                          XPathNSResolver resolver)
    throws XPathException, DOMException
  {
    return new DomXPathExpression(this, expression, resolver);
  }
  
  public XPathNSResolver createNSResolver(Node nodeResolver)
  {
    return new DomXPathNSResolver(nodeResolver);
  }
    
  public Object evaluate(String expression,
                         Node contextNode,
                         XPathNSResolver resolver,
                         short type,
                         Object result)
    throws XPathException, DOMException
  {
    XPathExpression xpe =
      new DomXPathExpression(this, expression, resolver);
    return xpe.evaluate(contextNode, type, result);
  }

}