Class DOMUtils

Method Details

• getChildElementByName

  public static Element getChildElementByName(Node parent, String name)

  Returns the first child element of a node which has a given name.

  Parameters:

  parent - the node whose children are to be searched

  name - the name of the element being searched for

  Returns:

  the first child of parent which is an Element and has the tagname name, or null if none match

• getChildElementsByName

  public static Element[] getChildElementsByName(Node parent, String name)

  Returns all child elements of a node with a given name.

  Parameters:

  parent - the node whose children are to be searched

  name - the name of the element being searched for

  Returns:

  array of child elements of parent with tagname name; if name is null, all child elements are returned

• getTextContent

  public static String getTextContent(Element el)

  Returns a string representing the plain text content of an element. Any comments, attributes, elements or other non-text children are ignored, and all CDATA and Text nodes are merged to give a single string.

  Parameters:

  el - the element whose text content is wanted

  Returns:

  the pure text content. If there is none, an empty string is returned.

• getFirstElementSibling

  public static Element getFirstElementSibling(Node node)

  Returns the first subsequent sibling of a given node which is an Element. This is useful for naviating a DOM as a tree of elements when the presence of text or attribute children is a distraction.

  Parameters:

  node - the node whose siblings (including itself) you are interested in. May be null

  Returns:

  the first sibling of node which is an Element. If node itself is an element, that is returned. If node has no subsequent siblings which are elements, or if it is null, then null is returned.

• relativizeDOM

  public static Node relativizeDOM(Node n, URI baseURI, String attname)

  Traverses the given DOM, relativising all the URIs in the uri attributes of each Element.

  The (uri-attribute) nodes in the input DOM are modified by this method; if this is a problem, use Node.cloneNode(boolean) first.

  Parameters:

  n - a node containing the DOM whose URIs are to be relativized. If this is null, the method immediately returns null

  baseURI - the URI relative to which the DOM is to be relativised. If this is null, then the input node is immediately returned unchanged.

  attname - the attribute name to be used. If null, this defaults to uri

  Returns:

  the input node

  See Also:

  • URI.relativize(URI)

• mapNodeType

  public static String mapNodeType(short nodeType)

  Maps a node type, as returned by to a name. The node types returned by Node.getNodeType() are numeric and are therefore inconveniently opaque.

  Parameters:

  nodeType - a numeric Node type, one of the node type constants defined in Node

  Returns:

  a string name for the type

• newDocument

  public static Document newDocument()

  Returns a new Document instance. This method just does all the tedious business of mucking about with factories for you.

  Returns:

  an empty Document