Java Element.hasAttributes方法代码示例

import org.w3c.dom.Element; //导入方法依赖的package包/类
private String getFilter(Element element) {
	String filter = "";
	if (element != null) {
		// Looks for attributes
		if (element.hasAttributes()) {
			List<String> list = Arrays.asList(new String[] {"id", "name"});
			Iterator<String> it = list.iterator();
			while (it.hasNext()) {
				Attr attr = element.getAttributeNode(it.next());
				if (filter.equals("") && (attr != null)) {
					filter += "[@" + attr.getNodeName().trim() + "=\""+ attr.getNodeValue().trim() + "\"";
					break;
				}
			}
		}
		
		// Looks for Text child node
		if (filter.equals("")) {
			
		}
	}
	
	return filter;
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
protected void parse(Element element) {
	if (XMLUtils.findChildNode(element, Node.ELEMENT_NODE) != null) {
		this.type = ELEMENT_COMPLEX_TYPE;
	}
	else if (element.hasAttributes()) {
		this.type = ELEMENT_COMPLEX_TYPE;
	}
	else {
		this.type = ELEMENT_SIMPLE_TYPE;
		this.value = element.getTextContent().trim();
	}
	
	NamedNodeMap map = element.getAttributes();
	for (int i=0; i<map.getLength(); i++) {
		add(map.item(i));
	}
	
	NodeList list = element.getChildNodes();
	for (int i=0; i<list.getLength(); i++) {
		add(list.item(i));
	}
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Returns the Attr[]s to be output for the given element.
 * <br>
 * The code of this method is a copy of {@link #handleAttributes(Element,
 * NameSpaceSymbTable)},
 * whereas it takes into account that subtree-c14n is -- well -- subtree-based.
 * So if the element in question isRoot of c14n, it's parent is not in the
 * node set, as well as all other ancestors.
 *
 * @param element
 * @param ns
 * @return the Attr[]s to be output
 * @throws CanonicalizationException
 */
@Override
protected Iterator<Attr> handleAttributesSubtree(Element element, NameSpaceSymbTable ns)
    throws CanonicalizationException {
    if (!element.hasAttributes()) {
        return null;
    }

    // result will contain all the attrs declared directly on that element
    final SortedSet<Attr> result = this.result;
    result.clear();

    if (element.hasAttributes()) {
        NamedNodeMap attrs = element.getAttributes();
        int attrsLength = attrs.getLength();

        for (int i = 0; i < attrsLength; i++) {
            Attr attribute = (Attr) attrs.item(i);
            result.add(attribute);
        }
    }

    return result.iterator();
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Looks up the namespace URI associated with the given prefix starting at the given element. This method differs
 * from the {@link Node#lookupNamespaceURI(java.lang.String)} in that it only those namespaces declared by an xmlns
 * attribute are inspected. The Node method also checks the namespace a particular node was created in by way of a
 * call like {@link Document#createElementNS(java.lang.String, java.lang.String)} even if the resulting element
 * doesn't have an namespace delcaration attribute.
 * 
 * @param startingElement the starting element
 * @param stopingElement the ancestor of the starting element that serves as the upper-bound, inclusive, for the
 *            search
 * @param prefix the prefix to look up
 * 
 * @return the namespace URI for the given prefer or null
 */
public static String lookupNamespaceURI(Element startingElement, Element stopingElement, String prefix) {
    String namespaceURI;

    // This code is a modified version of the lookup code within Xerces
    if (startingElement.hasAttributes()) {
        NamedNodeMap map = startingElement.getAttributes();
        int length = map.getLength();
        for (int i = 0; i < length; i++) {
            Node attr = map.item(i);
            String attrPrefix = attr.getPrefix();
            String value = attr.getNodeValue();
            namespaceURI = attr.getNamespaceURI();
            if (namespaceURI != null && namespaceURI.equals(XMLConstants.XMLNS_NS)) {
                // at this point we are dealing with DOM Level 2 nodes only
                if (prefix == null && attr.getNodeName().equals(XMLConstants.XMLNS_PREFIX)) {
                    // default namespace
                    return value;
                } else if (attrPrefix != null && attrPrefix.equals(XMLConstants.XMLNS_PREFIX)
                        && attr.getLocalName().equals(prefix)) {
                    // non default namespace
                    return value;
                }
            }
        }
    }

    if (startingElement != stopingElement) {
        Element ancestor = getElementAncestor(startingElement);
        if (ancestor != null) {
            return lookupNamespaceURI(ancestor, stopingElement, prefix);
        }
    }

    return null;
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Looks up the namespace prefix associated with the given URI starting at the given element. This method differs
 * from the {@link Node#lookupPrefix(java.lang.String)} in that it only those namespaces declared by an xmlns
 * attribute are inspected. The Node method also checks the namespace a particular node was created in by way of a
 * call like {@link Document#createElementNS(java.lang.String, java.lang.String)} even if the resulting element
 * doesn't have an namespace delcaration attribute.
 * 
 * @param startingElement the starting element
 * @param stopingElement the ancestor of the starting element that serves as the upper-bound, inclusive, for the
 *            search
 * @param namespaceURI the uri to look up
 * 
 * @return the prefix for the given namespace URI
 */
public static String lookupPrefix(Element startingElement, Element stopingElement, String namespaceURI) {
    String namespace;

    // This code is a modified version of the lookup code within Xerces
    if (startingElement.hasAttributes()) {
        NamedNodeMap map = startingElement.getAttributes();
        int length = map.getLength();
        for (int i = 0; i < length; i++) {
            Node attr = map.item(i);
            String attrPrefix = attr.getPrefix();
            String value = attr.getNodeValue();
            namespace = attr.getNamespaceURI();
            if (namespace != null && namespace.equals(XMLConstants.XMLNS_NS)) {
                // DOM Level 2 nodes
                if (attr.getNodeName().equals(XMLConstants.XMLNS_PREFIX)
                        || (attrPrefix != null && attrPrefix.equals(XMLConstants.XMLNS_PREFIX))
                        && value.equals(namespaceURI)) {

                    String localname = attr.getLocalName();
                    String foundNamespace = startingElement.lookupNamespaceURI(localname);
                    if (foundNamespace != null && foundNamespace.equals(namespaceURI)) {
                        return localname;
                    }
                }

            }
        }
    }

    if (startingElement != stopingElement) {
        Element ancestor = getElementAncestor(startingElement);
        if (ancestor != null) {
            return lookupPrefix(ancestor, stopingElement, namespaceURI);
        }
    }

    return null;
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Find the named subnode in a node's sublist.
 * <ul>
 * <li>Ignores comments and processing instructions.
 * <li>Ignores TEXT nodes (likely to exist and contain ignorable whitespace, if not validating.
 * <li>Ignores CDATA nodes and EntityRef nodes.
 * <li>Examines element nodes to find one with the specified name.
 * </ul>
 * 
 * @param name the tag name for the element to find
 * @param node the element node to start searching from
 * @return the Node found
 */
public static Node findNode(String name, Node node) {
  // get all child nodes
  NodeList list = node.getChildNodes();

  for (int i = 0; i < list.getLength(); i++) {
    // get child node
    Node childNode = list.item(i);

    if (childNode.getNodeType() == Node.ELEMENT_NODE) {
      Element element = (Element) childNode;
      if (element.hasAttributes()) {
        if (element.hasAttribute("id") && element.getAttribute("id") != null
            && !element.getAttribute("id").isEmpty() && element.getAttribute("id").equals(name)) {
          return element;
        } else if (element.hasAttribute("name") && element.getAttribute("name") != null
            && !element.getAttribute("name").isEmpty()
            && element.getAttribute("name").equals(name)) {
          return element;
        }
      }
    }
    // visit child node
    Node temp = findNode(name, childNode);
    if (temp != null)
      return temp;
  }
  return null;
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
@SuppressWarnings("fallthrough")
private static void getSetRec(final Node rootNode, final Set<Node> result,
                            final Node exclude, final boolean com) {
    if (rootNode == exclude) {
        return;
    }
    switch (rootNode.getNodeType()) {
    case Node.ELEMENT_NODE:
        result.add(rootNode);
        Element el = (Element)rootNode;
        if (el.hasAttributes()) {
            NamedNodeMap nl = el.getAttributes();
            for (int i = 0;i < nl.getLength(); i++) {
                result.add(nl.item(i));
            }
        }
        //no return keep working
    case Node.DOCUMENT_NODE:
        for (Node r = rootNode.getFirstChild(); r != null; r = r.getNextSibling()) {
            if (r.getNodeType() == Node.TEXT_NODE) {
                result.add(r);
                while ((r != null) && (r.getNodeType() == Node.TEXT_NODE)) {
                    r = r.getNextSibling();
                }
                if (r == null) {
                    return;
                }
            }
            getSetRec(r, result, exclude, com);
        }
        return;
    case Node.COMMENT_NODE:
        if (com) {
            result.add(rootNode);
        }
        return;
    case Node.DOCUMENT_TYPE_NODE:
        return;
    default:
        result.add(rootNode);
    }
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * This is the work horse for {@link #circumventBug2650}.
 *
 * @param node
 * @see <A HREF="http://nagoya.apache.org/bugzilla/show_bug.cgi?id=2650">
 * Namespace axis resolution is not XPath compliant </A>
 */
@SuppressWarnings("fallthrough")
private static void circumventBug2650internal(Node node) {
    Node parent = null;
    Node sibling = null;
    final String namespaceNs = Constants.NamespaceSpecNS;
    do {
        switch (node.getNodeType()) {
        case Node.ELEMENT_NODE :
            Element element = (Element) node;
            if (!element.hasChildNodes()) {
                break;
            }
            if (element.hasAttributes()) {
                NamedNodeMap attributes = element.getAttributes();
                int attributesLength = attributes.getLength();

                for (Node child = element.getFirstChild(); child!=null;
                    child = child.getNextSibling()) {

                    if (child.getNodeType() != Node.ELEMENT_NODE) {
                        continue;
                    }
                    Element childElement = (Element) child;

                    for (int i = 0; i < attributesLength; i++) {
                        Attr currentAttr = (Attr) attributes.item(i);
                        if (!namespaceNs.equals(currentAttr.getNamespaceURI())) {
                            continue;
                        }
                        if (childElement.hasAttributeNS(namespaceNs,
                                                        currentAttr.getLocalName())) {
                            continue;
                        }
                        childElement.setAttributeNS(namespaceNs,
                                                    currentAttr.getName(),
                                                    currentAttr.getNodeValue());
                    }
                }
            }
        case Node.ENTITY_REFERENCE_NODE :
        case Node.DOCUMENT_NODE :
            parent = node;
            sibling = node.getFirstChild();
            break;
        }
        while ((sibling == null) && (parent != null)) {
            sibling = parent.getNextSibling();
            parent = parent.getParentNode();
        }
        if (sibling == null) {
            return;
        }

        node = sibling;
        sibling = node.getNextSibling();
    } while (true);
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Returns the Attr[]s to be output for the given element.
 * <br>
 * The code of this method is a copy of {@link #handleAttributes(Element,
 * NameSpaceSymbTable)},
 * whereas it takes into account that subtree-c14n is -- well --
 * subtree-based.
 * So if the element in question isRoot of c14n, it's parent is not in the
 * node set, as well as all other ancestors.
 *
 * @param element
 * @param ns
 * @return the Attr[]s to be output
 * @throws CanonicalizationException
 */
@Override
protected Iterator<Attr> handleAttributesSubtree(Element element, NameSpaceSymbTable ns)
    throws CanonicalizationException {
    if (!element.hasAttributes() && !firstCall) {
        return null;
    }
    // result will contain the attrs which have to be output
    final SortedSet<Attr> result = this.result;
    result.clear();

    if (element.hasAttributes()) {
        NamedNodeMap attrs = element.getAttributes();
        int attrsLength = attrs.getLength();

        for (int i = 0; i < attrsLength; i++) {
            Attr attribute = (Attr) attrs.item(i);
            String NUri = attribute.getNamespaceURI();
            String NName = attribute.getLocalName();
            String NValue = attribute.getValue();

            if (!XMLNS_URI.equals(NUri)) {
                // It's not a namespace attr node. Add to the result and continue.
                result.add(attribute);
            } else if (!(XML.equals(NName) && XML_LANG_URI.equals(NValue))) {
                // The default mapping for xml must not be output.
                Node n = ns.addMappingAndRender(NName, NValue, attribute);

                if (n != null) {
                    // Render the ns definition
                    result.add((Attr)n);
                    if (C14nHelper.namespaceIsRelative(attribute)) {
                        Object exArgs[] = {element.getTagName(), NName, attribute.getNodeValue()};
                        throw new CanonicalizationException(
                            "c14n.Canonicalizer.RelativeNamespace", exArgs
                        );
                    }
                }
            }
        }
    }

    if (firstCall) {
        // It is the first node of the subtree
        // Obtain all the namespaces defined in the parents, and added to the output.
        ns.getUnrenderedNodes(result);
        // output the attributes in the xml namespace.
        xmlattrStack.getXmlnsAttr(result);
        firstCall = false;
    }

    return result.iterator();
}
 

import org.w3c.dom.Element; //导入方法依赖的package包/类
/**
 * Returns the Attr[]s to be output for the given element.
 * <br>
 * The code of this method is a copy of {@link #handleAttributes(Element,
 * NameSpaceSymbTable)},
 * whereas it takes into account that subtree-c14n is -- well -- subtree-based.
 * So if the element in question isRoot of c14n, it's parent is not in the
 * node set, as well as all other ancestors.
 *
 * @param element
 * @param ns
 * @return the Attr[]s to be output
 * @throws CanonicalizationException
 */
@Override
protected Iterator<Attr> handleAttributesSubtree(Element element, NameSpaceSymbTable ns)
    throws CanonicalizationException {
    if (!element.hasAttributes() && !firstCall) {
        return null;
    }
    // result will contain the attrs which have to be output
    final SortedSet<Attr> result = this.result;
    result.clear();

    if (element.hasAttributes()) {
        NamedNodeMap attrs = element.getAttributes();
        int attrsLength = attrs.getLength();

        for (int i = 0; i < attrsLength; i++) {
            Attr attribute = (Attr) attrs.item(i);
            String NUri = attribute.getNamespaceURI();
            String NName = attribute.getLocalName();
            String NValue = attribute.getValue();

            if (!XMLNS_URI.equals(NUri)) {
                //It's not a namespace attr node. Add to the result and continue.
                result.add(attribute);
            } else if (!(XML.equals(NName) && XML_LANG_URI.equals(NValue))) {
                //The default mapping for xml must not be output.
                Node n = ns.addMappingAndRender(NName, NValue, attribute);

                if (n != null) {
                    //Render the ns definition
                    result.add((Attr)n);
                    if (C14nHelper.namespaceIsRelative(attribute)) {
                        Object exArgs[] = { element.getTagName(), NName, attribute.getNodeValue() };
                        throw new CanonicalizationException(
                            "c14n.Canonicalizer.RelativeNamespace", exArgs
                        );
                    }
                }
            }
        }
    }

    if (firstCall) {
        //It is the first node of the subtree
        //Obtain all the namespaces defined in the parents, and added to the output.
        ns.getUnrenderedNodes(result);
        //output the attributes in the xml namespace.
        xmlattrStack.getXmlnsAttr(result);
        firstCall = false;
    }

    return result.iterator();
}