Example usage for org.w3c.dom Element getElementsByTagName

Introduction

In this page you can find the example usage for org.w3c.dom Element getElementsByTagName.

Prototype

public NodeList getElementsByTagName(String name);

Source Link

Document

Returns a NodeList of all descendant Elements with a given tag name, in document order.

Usage

From source file:Main.java

public static Vector getElementsByTagAndAttribValue(org.w3c.dom.Element element, String tag, String attrib,
        String val) {
    NodeList desElements = element.getElementsByTagName(tag);
    Vector selElements = new Vector(desElements.getLength() / 10, 10);

    for (int i = 0; i < desElements.getLength(); i++) {
        org.w3c.dom.Node desElement = desElements.item(i);

        if (desElement.getNodeType() == org.w3c.dom.Element.ELEMENT_NODE) {
            NamedNodeMap attributeNodes = desElement.getAttributes();

            org.w3c.dom.Node selAttribNode = attributeNodes.getNamedItem(attrib);

            if (selAttribNode != null && selAttribNode.getNodeValue().equalsIgnoreCase(val)) {
                selElements.add(desElement);
            }/*from  w  w  w. j  a  v  a2  s.c  om*/
        }
    }

    return selElements;
}

From source file:Main.java

public static String getAttributeFromElement(Element element, String name, String attributeName) {
    String result = null;/* w  ww. j  a  va 2 s  .c  om*/
    Element nameElement = (Element) element.getElementsByTagName(name).item(0);
    if (nameElement != null) {
        result = nameElement.getAttribute(attributeName).toString();
    }
    if (result != null && result.length() == 0) {
        result = null;
    }
    return result;
}

From source file:Main.java

private static void stripNamedElements(Document document, String name) {
    Element root = document.getDocumentElement();
    if (root != null) {
        NodeList nodes = root.getElementsByTagName(name);
        for (int i = 0; i < nodes.getLength(); i++) {
            Node node = nodes.item(i);
            node.getParentNode().removeChild(node);
        }/*from  w  w  w .  ja va 2s  . c  o  m*/
    }
}

From source file:Main.java

public static List<String> parseChildNodesAsList(Element current, String name) {

    List<String> result = new ArrayList<String>();

    NodeList nodes = current.getElementsByTagName(name);

    for (int i = 0; i < nodes.getLength(); ++i) {

        Element e = (Element) nodes.item(i);

        Node child = e.getFirstChild();

        if (child == null)
            continue;

        result.add(child.getNodeValue());

    }//from   www  .j  a  v a 2 s .c  om

    return result;
}

From source file:Main.java

/**
 * Retrieves the DOM <code>NodeList</code> contained by the named element
 * in the given parent element.<br>
 * <br>//from   ww  w .  j  av a  2  s  .  c  o  m
 * <pre>
 * <parent-element>
 *     <named-list>
 *         <list-item/>
 *         <list-item/>
 *     </named-list>
 * </parent-element>
 * </pre>
 * 
 * In the above example, a <code>NodeList</code> containing the two
 * <pre><list-item/></pre> elements would be returned by passing the parent
 * element and "named-list" into the function parameters.
 * 
 * @param parent The parent DOM element that contains the named list.
 * @param containerTagName The name of the element that contains the list items.
 * @return A <code>NodeList</code> containing the list items.
 * @throws Exception If an exception occurs while traversing the DOM objects.
 */
public static NodeList getNamedNodeList(Element parent, String containerTagName) throws Exception {
    NodeList nl = parent.getElementsByTagName(containerTagName);

    if (nl.getLength() < 1) {
        throw new Exception("Missing named list: " + containerTagName);
    }

    return nl.item(0).getChildNodes();
}

From source file:Main.java

/**
 * Get the attribute values of a given name/value pair for
 * the first XML {@code org.w3c.dom.Element} of given name.
 *
 * @param elem the parent XML Element/*from  w ww  .j a v  a2 s  .c  o  m*/
 * @param name the name of the child text Element
 * @return attribute name and value Map of named child Element
 */
public static Map<String, String> getAllAttributes(Element elem, String name) {
    Map<String, String> attributes = new TreeMap<String, String>();
    NodeList nodeList = elem.getElementsByTagName(name);
    int length = nodeList.getLength();
    for (int n = 0; n < length; ++n) {
        attributes.put(((Element) nodeList.item(n)).getAttribute("name"),
                ((Element) nodeList.item(n)).getAttribute("value"));
    }
    return attributes;
}

From source file:Main.java

/** Returns the first 'subElement' of 'node'. */
public static Element findFirst(Element node, String subElement) {
    Element ans = null;/*www.j  a v  a2  s .  c o m*/
    if (node != null) {
        NodeList nl = node.getElementsByTagName(subElement);
        if (nl != null && nl.getLength() > 0)
            ans = (Element) nl.item(0);
    }
    return ans;
}

From source file:Main.java

public static String[] getChildrenAsStrings(Element parent, String childName) {
    if (doesElementContainChildren(parent, childName)) {
        NodeList children = parent.getElementsByTagName(childName);
        String[] strings = new String[children.getLength()];
        for (int i = 0; i < children.getLength(); i++) {
            strings[i] = children.item(i).getTextContent();
        }/*from  w  w  w.  j  av a  2s.  com*/
        return strings;
    }
    return null;
}

From source file:Main.java

/**
 * Gets the value from the first descendant of a given ancestor, where the
 * descendant has the specified name./*from w  w  w .  ja  va2 s  .  co  m*/
 * 
 * @param ancestor
 *            the ancestor element
 * @param tagname
 *            the tag name of the descendant to find.
 * @return the value of the descendant or <code>null</code> if no descendant
 *         with that name could be found or the descendant found has no
 *         value.
 */
public static String getValueFromDescendant(Element ancestor, String tagname) {
    if (ancestor != null) {
        NodeList nl = ancestor.getElementsByTagName(tagname);
        if (!isEmpty(nl)) {
            Element e = (Element) nl.item(0);
            Node c = e.getFirstChild();
            if (c != null) {
                return c.getNodeValue();
            }
        }
    }
    return null;
}

From source file:Main.java

/**
 * Gets the child element.// ww  w  .  j  a va2 s.  c  o m
 * 
 * @param el 
 * @param tagName 
 * 
 * @return the child element
 */
public static Element getChildElement(Element el, String tagName) {
    if (el == null) {
        return null;
    }
    NodeList list = el.getElementsByTagName(tagName);
    if (list != null && list.getLength() > 0) {
        return (Element) list.item(0);
    }
    return null;
}