javax.servlet.http.HttpUtils#org.w3c.dom.NodeList源码实例Demo

private int computeLength(IIOMetadataNode root) {
    NodeList list = root.getChildNodes();
    int length = 0;
    for (int i = 0; i < list.getLength(); i++) {
        IIOMetadataNode node = (IIOMetadataNode)list.item(i);
        String name = node.getNodeName();

        if (format.isLeaf(name))
            length += new Integer((String)Box.getAttribute(node, "Length")).intValue();
        else
            length += computeLength(node);

    }

    return length + (root.getNodeName().startsWith("JPEG2000") ? 8 : 0) ;
}
 

protected T buildModel(Element root) {
   B builder = builder();
   builder
      .withName(root.getAttribute("name"))
      .withNamespace(root.getAttribute("namespace"))
      .withVersion(root.getAttribute("version"));
   
   NodeList nodes = root.getElementsByTagNameNS(schemaURI, "description");
   if (nodes.getLength() > 0)
   {
      Element description = (Element)nodes.item(0);
      builder.withDescription(readDescription(description));
   }
   else {
      logger.warn("No description was given for the capability {}", root.getAttribute("name"));
   }

   populateDefinitionSpecificData(builder, root);

   builder.withMethods(buildMethods(root.getElementsByTagNameNS(schemaURI, "method")));
   builder.withEvents(buildEvents(root.getElementsByTagNameNS(schemaURI, "event")));
   return builder.build();
}
 

@Override
public void deserialize(Model aModel, Document aDocument) {
	// Now, parse tables
	NodeList theElements = aDocument.getElementsByTagName(TABLE);
	for (int i = 0; i < theElements.getLength(); i++) {
		Element theElement = (Element) theElements.item(i);

		Table theTable = new Table();
		theTable.setOwner(aModel);
		deserializeProperties(theElement, theTable);

		deserializeCommentElement(theElement, theTable);

		getXMLModelSerializer().getXMLAttributeSerializer().deserialize(aModel, theTable, theElement);
		getXMLModelSerializer().getXMLIndexSerializer().deserialize(theTable, theElement);

		aModel.getTables().add(theTable);
	}
}
 

public static void resolveLeafNodeValue(Node node) {

        if (node != null) {
            Element element = (Element) node;
            NodeList childNodeList = element.getChildNodes();
            for (int j = 0; j < childNodeList.getLength(); j++) {
                Node chileNode = childNodeList.item(j);
                if (!chileNode.hasChildNodes()) {
                    String nodeValue = resolveSystemProperty(chileNode.getTextContent());
                    childNodeList.item(j).setTextContent(nodeValue);
                } else {
                    resolveLeafNodeValue(chileNode);
                }
            }
        }
    }
 

/**
 * Method itemUnknownElement
 *
 * @param i index
 * @return the element number of the unknown elements
 */
public Element itemUnknownElement(int i) {
    NodeList nl = this.constructionElement.getChildNodes();
    int res = 0;

    for (int j = 0; j < nl.getLength(); j++) {
        Node current = nl.item(j);

        /**
         * $todo$ using this method, we don't see unknown Elements
         *  from Signature NS; revisit
         */
        if ((current.getNodeType() == Node.ELEMENT_NODE)
            && current.getNamespaceURI().equals(Constants.SignatureSpecNS)) {
            res++;

            if (res == i) {
                return (Element) current;
            }
        }
    }

    return null;
}
 

void updateFromNativeNode(Node node, boolean fromScratch)
    throws IIOInvalidTreeException {
    NamedNodeMap attrs = node.getAttributes();
    int value = getAttributeValue(node, attrs, "process", 0, 2, false);
    tag = (value != -1) ? value+JPEG.SOF0 : tag;
    // If samplePrecision is present, it must be 8.
    // This just checks.  We don't bother to assign the value.
    value = getAttributeValue(node, attrs, "samplePrecision", 8, 8, false);
    value = getAttributeValue(node, attrs, "numLines", 0, 65535, false);
    numLines = (value != -1) ? value : numLines;
    value = getAttributeValue(node, attrs, "samplesPerLine", 0, 65535, false);
    samplesPerLine = (value != -1) ? value : samplesPerLine;
    int numComponents = getAttributeValue(node, attrs, "numFrameComponents",
                                          1, 4, false);
    NodeList children = node.getChildNodes();
    if (children.getLength() != numComponents) {
        throw new IIOInvalidTreeException
            ("numFrameComponents must match number of children", node);
    }
    componentSpecs = new ComponentSpec [numComponents];
    for (int i = 0; i < numComponents; i++) {
        componentSpecs[i] = new ComponentSpec(children.item(i));
    }
}
 

/**
 * Find the value entry in a node
 *
 * @param n The node
 * @return The value entry as a string
 */
public static String getNodeValue( Node n ) {
  if ( n == null ) {
    return null;
  }

  // Find the child-nodes of this Node n:
  NodeList children = n.getChildNodes();
  for ( int i = 0; i < children.getLength(); i++ ) {
    // Try all children
    Node childnode = children.item( i );
    String retval = childnode.getNodeValue();
    if ( retval != null ) { // We found the right value
      return retval;
    }
  }
  return null;
}
 

private void mergeStandardTextNode(Node node)
    throws IIOInvalidTreeException {
    // Convert to comments.  For the moment ignore the encoding issue.
    // Ignore keywords, language, and encoding (for the moment).
    // If compression tag is present, use only entries with "none".
    NodeList children = node.getChildNodes();
    for (int i = 0; i < children.getLength(); i++) {
        Node child = children.item(i);
        NamedNodeMap attrs = child.getAttributes();
        Node comp = attrs.getNamedItem("compression");
        boolean copyIt = true;
        if (comp != null) {
            String compString = comp.getNodeValue();
            if (!compString.equals("none")) {
                copyIt = false;
            }
        }
        if (copyIt) {
            String value = attrs.getNamedItem("value").getNodeValue();
            COMMarkerSegment com = new COMMarkerSegment(value);
            insertCOMMarkerSegment(com);
        }
    }
}
 

/**
 * The set:distinct function returns a subset of the nodes contained in the node-set NS passed
 * as the first argument. Specifically, it selects a node N if there is no node in NS that has
 * the same string value as N, and that precedes N in document order.
 *
 * @param nl NodeList for the node-set.
 * @return a NodeList with nodes from nl containing distinct string values.
 * In other words, if more than one node in nl contains the same string value,
 * only include the first such node found.
 *
 * @see <a href="http://www.exslt.org/">EXSLT</a>
 */
public static NodeList distinct(NodeList nl)
{
  NodeSet dist = new NodeSet();
  dist.setShouldCacheNodes(true);

  Map<String, Node> stringTable = new HashMap<>();

  for (int i = 0; i < nl.getLength(); i++)
  {
    Node currNode = nl.item(i);
    String key = toString(currNode);

    if (key == null)
      dist.addElement(currNode);
    else if (!stringTable.containsKey(key))
    {
      stringTable.put(key, currNode);
      dist.addElement(currNode);
    }
  }

  return dist;
}
 

/**
 * Count nodes with a certain tag
 *
 * @param n   The node to look in
 * @param tag The tags to count
 * @return The number of nodes found with a certain tag
 */
public static int countNodes( Node n, String tag ) {
  NodeList children;
  Node childnode;

  int count = 0;

  if ( n == null ) {
    return 0;
  }

  children = n.getChildNodes();
  for ( int i = 0; i < children.getLength(); i++ ) {
    childnode = children.item( i );
    if ( childnode.getNodeName().equalsIgnoreCase( tag ) ) {
      // <file>
      count++;
    }
  }
  return count;
}
 

public void serializeBody(Object element, XMLSerializer target) throws SAXException, IOException, XMLStreamException {
    NodeList childNodes = ((Element)element).getChildNodes();
    int len = childNodes.getLength();
    for( int i=0; i<len; i++ ) {
        Node child = childNodes.item(i);
        switch(child.getNodeType()) {
        case Node.CDATA_SECTION_NODE:
        case Node.TEXT_NODE:
            target.text(child.getNodeValue(),null);
            break;
        case Node.ELEMENT_NODE:
            target.writeDom((Element)child,domHandler,null,null);
            break;
        }
    }
}
 

private Set<PluginPackageDependency> parsePackageDependencies(NodeList packageDependencyNodes,
        PluginPackage pluginPackage) throws XPathExpressionException {
    Set<PluginPackageDependency> pluginPackageDependencies = new LinkedHashSet<>();
    for (int i = 0; i < packageDependencyNodes.getLength(); i++) {
        Node pluginPackageDependencyNode = packageDependencyNodes.item(i);

        PluginPackageDependency pluginPackageDependency = new PluginPackageDependency();
        pluginPackageDependency.setPluginPackage(pluginPackage);

        pluginPackageDependency.setDependencyPackageName(
                getNonNullStringAttribute(pluginPackageDependencyNode, "./@name", "Package dependency name"));
        pluginPackageDependency.setDependencyPackageVersion(
                getNonNullStringAttribute(pluginPackageDependencyNode, "./@version", "Package dependency version"));

        pluginPackageDependency.setPluginPackage(pluginPackage);

        pluginPackageDependencies.add(pluginPackageDependency);
    }
    return pluginPackageDependencies;
}
 

void updateFromNativeNode(Node node, boolean fromScratch)
    throws IIOInvalidTreeException {
    NamedNodeMap attrs = node.getAttributes();
    int value = getAttributeValue(node, attrs, "process", 0, 2, false);
    tag = (value != -1) ? value+JPEG.SOF0 : tag;
    // If samplePrecision is present, it must be 8.
    // This just checks.  We don't bother to assign the value.
    value = getAttributeValue(node, attrs, "samplePrecision", 8, 8, false);
    value = getAttributeValue(node, attrs, "numLines", 0, 65535, false);
    numLines = (value != -1) ? value : numLines;
    value = getAttributeValue(node, attrs, "samplesPerLine", 0, 65535, false);
    samplesPerLine = (value != -1) ? value : samplesPerLine;
    int numComponents = getAttributeValue(node, attrs, "numFrameComponents",
                                          1, 4, false);
    NodeList children = node.getChildNodes();
    if (children.getLength() != numComponents) {
        throw new IIOInvalidTreeException
            ("numFrameComponents must match number of children", node);
    }
    componentSpecs = new ComponentSpec [numComponents];
    for (int i = 0; i < numComponents; i++) {
        componentSpecs[i] = new ComponentSpec(children.item(i));
    }
}
 

public Configuration parseConfiguration(Element rootNode)
        throws XMLParserException {

    Configuration configuration = new Configuration();

    NodeList nodeList = rootNode.getChildNodes();
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node childNode = nodeList.item(i);

        if (childNode.getNodeType() != Node.ELEMENT_NODE) {
            continue;
        }

        if ("properties".equals(childNode.getNodeName())) {
            parseProperties(childNode);
        } else if ("classPathEntry".equals(childNode.getNodeName())) {
            parseClassPathEntry(configuration, childNode);
        } else if ("context".equals(childNode.getNodeName())) {
            parseContext(configuration, childNode);
        }
    }

    return configuration;
}
 

public static Range<Integer> parseIntegerRange(Element xmlElement, String tagName) {
  NodeList items = xmlElement.getElementsByTagName(tagName);
  if (items.getLength() == 0)
    return null;
  Element tag = (Element) items.item(0);
  items = tag.getElementsByTagName("min");
  if (items.getLength() == 0)
    return null;
  Element min = (Element) items.item(0);
  items = tag.getElementsByTagName("max");
  if (items.getLength() == 0)
    return null;
  Element max = (Element) items.item(0);

  String minText = min.getTextContent();
  String maxText = max.getTextContent();
  Range<Integer> r = Range.closed(Integer.valueOf(minText), Integer.valueOf(maxText));
  return r;
}
 

/**
 * Get the value of a tag in a node
 *
 * @param n   The node to look in
 * @param tag The tag to look for
 * @return The value of the tag or null if nothing was found.
 */
public static String getTagValue( Node n, String tag ) {
  NodeList children;
  Node childnode;

  if ( n == null ) {
    return null;
  }

  children = n.getChildNodes();
  for ( int i = 0; i < children.getLength(); i++ ) {
    childnode = children.item( i );
    if ( childnode.getNodeName().equalsIgnoreCase( tag ) ) {
      if ( childnode.getFirstChild() != null ) {
        return childnode.getFirstChild().getNodeValue();
      }
    }
  }
  return null;
}
 

void updateFromNativeNode(Node node, boolean fromScratch)
    throws IIOInvalidTreeException {
    NamedNodeMap attrs = node.getAttributes();
    int value = getAttributeValue(node, attrs, "process", 0, 2, false);
    tag = (value != -1) ? value+JPEG.SOF0 : tag;
    // If samplePrecision is present, it must be 8.
    // This just checks.  We don't bother to assign the value.
    value = getAttributeValue(node, attrs, "samplePrecision", 8, 8, false);
    value = getAttributeValue(node, attrs, "numLines", 0, 65535, false);
    numLines = (value != -1) ? value : numLines;
    value = getAttributeValue(node, attrs, "samplesPerLine", 0, 65535, false);
    samplesPerLine = (value != -1) ? value : samplesPerLine;
    int numComponents = getAttributeValue(node, attrs, "numFrameComponents",
                                          1, 4, false);
    NodeList children = node.getChildNodes();
    if (children.getLength() != numComponents) {
        throw new IIOInvalidTreeException
            ("numFrameComponents must match number of children", node);
    }
    componentSpecs = new ComponentSpec [numComponents];
    for (int i = 0; i < numComponents; i++) {
        componentSpecs[i] = new ComponentSpec(children.item(i));
    }
}
 

private static Node getNodeByXpath(String xml, String xPathString) throws Exception {
  DocumentBuilder builder;
  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  Document doc = null;

  try {
    builder = factory.newDocumentBuilder();
    doc = builder.parse(new InputSource(new StringReader(xml)));
  } catch (Exception e) {
    logger.warning("Failed to parse xml." + e.getMessage());
  }
  XPath xpathCompiler = XPathFactory.newInstance().newXPath();

  NodeList nodes =
      (NodeList) xpathCompiler.compile(xPathString).evaluate(doc, XPathConstants.NODESET);
  if (nodes.getLength() == 0) {
    return null;
  }
  return nodes.item(0);
}
 

private static boolean isNewFormatNode(Node node) {
    // check for new node format - if the first non-whitespace node
    // is an XML comment, and the comment includes
    // one of the old element tags,
    // then it is a generated node
    NodeList children = node.getChildNodes();
    int length = children.getLength();
    for (int i = 0; i < length; i++) {
        Node childNode = children.item(i);
        if (childNode != null && childNode.getNodeType() == Node.COMMENT_NODE) {
            String commentData = ((Comment) childNode).getData();
            return MergeConstants.comentContainsTag(commentData);
        }
    }
    
    return false;
}
 

/**
 * Return the string value of a Node
 *
 * @param n The Node.
 * @return The string value of the Node
 */
protected static String toString(Node n)
{
  if (n instanceof DTMNodeProxy)
       return ((DTMNodeProxy)n).getStringValue();
  else
  {
    String value = n.getNodeValue();
    if (value == null)
    {
      NodeList nodelist = n.getChildNodes();
      StringBuffer buf = new StringBuffer();
      for (int i = 0; i < nodelist.getLength(); i++)
      {
        Node childNode = nodelist.item(i);
        buf.append(toString(childNode));
      }
      return buf.toString();
    }
    else
      return value;
  }
}
 

/** Constructs a <code>FileTypeBox</code> from
 *  <code>org.w3c.dom.Node</code>.
 */
public FileTypeBox(Node node) throws IIOInvalidTreeException {
    super(node);
    NodeList children = node.getChildNodes();

    for (int i = 0; i < children.getLength(); i++) {
        Node child = children.item(i);
        String name = child.getNodeName();

        if ("Brand".equals(name)) {
            brand = Box.getIntElementValue(child);
        }

        if ("MinorVersion".equals(name)) {
            minorVersion = Box.getIntElementValue(child);
        }

        if ("CompatibilityList".equals(name)) {
            compatibility = Box.getIntArrayElementValue(child);
        }
    }
}
 

/**
 * Creates a new XML Schema element of the given local name
 * and insert it as the first child of the given parent node.
 *
 * @return
 *      Newly create element.
 */
private Element insertXMLSchemaElement( Element parent, String localName ) {
    // use the same prefix as the parent node to avoid modifying
    // the namespace binding.
    String qname = parent.getTagName();
    int idx = qname.indexOf(':');
    if(idx==-1)     qname = localName;
    else            qname = qname.substring(0,idx+1)+localName;

    Element child = parent.getOwnerDocument().createElementNS( WellKnownNamespace.XML_SCHEMA, qname );

    NodeList children = parent.getChildNodes();

    if( children.getLength()==0 )
        parent.appendChild(child);
    else
        parent.insertBefore( child, children.item(0) );

    return child;
}
 

/**
 * Get the value of a tag in a node
 *
 * @param n   The node to look in
 * @param tag The tag to look for
 * @return The value of the tag or null if nothing was found.
 */
public static String getTagValueWithAttribute( Node n, String tag, String attribute ) {
  NodeList children;
  Node childnode;

  if ( n == null ) {
    return null;
  }

  children = n.getChildNodes();
  for ( int i = 0; i < children.getLength(); i++ ) {
    childnode = children.item( i );
    if ( childnode.getNodeName().equalsIgnoreCase( tag )
      && childnode.getAttributes().getNamedItem( attribute ) != null ) {
      if ( childnode.getFirstChild() != null ) {
        return childnode.getFirstChild().getNodeValue();
      }
    }
  }
  return null;
}
 

protected void validateIdAttributes(Document doc) throws Exception {
  String idAttribute = new String(idIdentifier.getText());
  if( idAttribute == null || idAttribute.isEmpty() ) {
    return;
  }
  XPathFactory xPathfactory = XPathFactory.newInstance();
  XPath xpath = xPathfactory.newXPath();
  XPathExpression expr = xpath.compile("descendant-or-self::*/@" + idAttribute);
  NodeList nodeList = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
  if(nodeList != null && nodeList.getLength() > 0) {
    for(int j = 0; j < nodeList.getLength(); j++) {
        Attr attr = (Attr)nodeList.item(j);
        ((Element)attr.getOwnerElement()).setIdAttributeNode(attr,true);
    }
  }
}
 

/**
 * Get nodes with a certain tag one level down
 *
 * @param n   The node to look in
 * @param tag The tags to count
 * @return The list of nodes found with the specified tag
 */
public static List<Node> getNodes( Node n, String tag ) {
  NodeList children;
  Node childnode;

  List<Node> nodes = new ArrayList<Node>();

  if ( n == null ) {
    return nodes;
  }

  children = n.getChildNodes();
  for ( int i = 0; i < children.getLength(); i++ ) {
    childnode = children.item( i );
    if ( childnode.getNodeName().equalsIgnoreCase( tag ) ) {
      // <file>
      nodes.add( childnode );
    }
  }
  return nodes;
}
 

protected void parseJavaModelGenerator(Context context, Node node) {
    JavaModelGeneratorConfiguration javaModelGeneratorConfiguration = new JavaModelGeneratorConfiguration();

    context
            .setJavaModelGeneratorConfiguration(javaModelGeneratorConfiguration);

    Properties attributes = parseAttributes(node);
    String targetPackage = attributes.getProperty("targetPackage");
    String targetProject = attributes.getProperty("targetProject");

    javaModelGeneratorConfiguration.setTargetPackage(targetPackage);
    javaModelGeneratorConfiguration.setTargetProject(targetProject);

    NodeList nodeList = node.getChildNodes();
    for (int i = 0; i < nodeList.getLength(); i++) {
        Node childNode = nodeList.item(i);

        if (childNode.getNodeType() != Node.ELEMENT_NODE) {
            continue;
        }

        if ("property".equals(childNode.getNodeName())) {
            parseProperty(javaModelGeneratorConfiguration, childNode);
        }
    }
}
 

private Set<PluginPackageMenu> parseMenus(NodeList menuNodes, PluginPackage pluginPackage)
        throws XPathExpressionException {
    Set<PluginPackageMenu> pluginPackageMenus = new LinkedHashSet<>();

    for (int i = 0; i < menuNodes.getLength(); i++) {
        Node pluginPackageMenuNode = menuNodes.item(i);

        PluginPackageMenu pluginPackageMenu = new PluginPackageMenu();
        pluginPackageMenu
                .setCode(getNonNullStringAttribute(pluginPackageMenuNode, "./@code", "Plugin package menu code"));
        pluginPackageMenu.setCategory(
                getNonNullStringAttribute(pluginPackageMenuNode, "./@cat", "Plugin package menu category"));
        String menuDisplayName = getNonNullStringAttribute(pluginPackageMenuNode, "./@displayName",
                "Plugin package menu display name");
        pluginPackageMenu.setDisplayName(menuDisplayName);
        String localDisplayName = getStringAttribute(pluginPackageMenuNode, "./@localDisplayName");
        if (StringUtils.isNotBlank(localDisplayName)) {
            pluginPackageMenu.setLocalDisplayName(localDisplayName);
        } else {
            pluginPackageMenu.setLocalDisplayName(menuDisplayName);
        }
        pluginPackageMenu.setPath(pluginPackageMenuNode.getTextContent());
        pluginPackageMenu.setSource(pluginPackage.getId());

        pluginPackageMenu.setPluginPackage(pluginPackage);

        pluginPackageMenus.add(pluginPackageMenu);
    }

    return pluginPackageMenus;
}
 

/**
 * Removes whitespaces from nodes
 * @param node Root node
 */
public static void trimWhitespace(Node node) {
    NodeList children = node.getChildNodes();
    for(int i = 0; i < children.getLength(); ++i) {
        Node child = children.item(i);
        if(child.getNodeType() == Node.TEXT_NODE) {
            child.setTextContent(child.getTextContent().trim());
        }
        trimWhitespace(child);
    }
}
 

/**
 * Load local xml data for case-value mapping, transform info.
 *
 * @return
 * @throws URISyntaxException
 * @throws ParserConfigurationException
 * @throws SAXException
 * @throws IOException
 */
private static Node loadTransformXmlMetadata( String fileName ) throws URISyntaxException, ParserConfigurationException, SAXException, IOException {
  String PKG = SwitchCaseTest.class.getPackage().getName().replace( ".", "/" );
  PKG = PKG + "/";
  URL url = SwitchCaseTest.class.getClassLoader().getResource( PKG + fileName );
  File file = new File( url.toURI() );
  DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
  DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
  Document doc = dBuilder.parse( file );
  NodeList nList = doc.getElementsByTagName( "transform" );
  return nList.item( 0 );
}
 

private void parse(Document doc) {
	NodeList nodeList = doc.getChildNodes();
	for (int count = 0; count < nodeList.getLength(); count++) {
		Node node = nodeList.item(count);
		if (node.getNodeType() == Node.ELEMENT_NODE
				&& node.hasChildNodes()) {
			parseAttrList(node.getChildNodes());
		}
	}
}