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

/**
 * Update a property of a given configuration file and return a string representation of the
 * xml document//from   w w  w.  j a  va 2 s.c om
 * @param doc
 * @param property
 * @param newValue
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 * @throws ClassNotFoundException 
 */
public static String updateXmlDoc(Document doc, List<String> properties)
        throws ClassNotFoundException, InstantiationException, IllegalAccessException {
    for (String property : properties) {
        String key = property.split(":")[0];
        String value = property.split(":")[1];
        NodeList propertiesNode = doc.getElementsByTagName("esf:property");
        for (int i = 0; i < propertiesNode.getLength(); i++) {
            Node node = propertiesNode.item(i);
            if (node.getNodeType() == Node.ELEMENT_NODE) {
                Element el = (Element) node;
                if (key.equals(el.getAttribute("name"))) {
                    el.getElementsByTagName("esf:value").item(0).setTextContent(value);
                }
            }
        }
    }
    return parseXmlDocToString(doc);
}

From source file:Main.java

public static boolean updateTextNode(String nodeName, Element searchFrom, String data, int position)
        throws Exception {
    boolean result = false;
    Element currentElement = (Element) searchFrom.getElementsByTagName(nodeName).item(position);

    if (currentElement != null && currentElement.getNodeType() == Node.ELEMENT_NODE) {
        Text textNode = (Text) (currentElement.getFirstChild());
        textNode.setData(data);//from  w w  w .  j a va  2  s  .co m

        if (textNode != null && textNode.getNodeValue() == null)
            result = false;
        else
            result = true;
    }
    return result;
}

From source file:Main.java

public static String getNamedElemXml(Element parent, String elementName) throws Exception {
    String val = null;
    NodeList list = parent.getElementsByTagName(elementName);
    if (list.getLength() > 0) {
        val = getXmlString(list.item(0));
    }// w w w. j a v a2  s  .co m
    return val;
}

From source file:Main.java

/**
 *  Given a todo element, we must get the element specified
 *  by the tagName, then must traverse that Node to get the
 *  value.//  www.j a v  a  2  s.  c  om
 * @param e
 * @param tagName
 * @return the value of the corresponding element
 */
public static String getValue(Element e, String tagName) {
    try {
        // Get node lists of a tag name from an Element
        NodeList elements = e.getElementsByTagName(tagName);
        Node node = elements.item(0);
        NodeList nodes = node.getChildNodes();

        // Find a value whose value is non-whitespace
        String s;
        for (int i = 0; i < nodes.getLength(); i++) {
            s = ((Node) nodes.item(i)).getNodeValue().trim();
            if (s.equals("") || s.equals("\r")) {
                continue;
            } else {
                return s;
            }
        }
    } catch (Exception ex) {
        return null;
    }
    return null;
}

From source file:Main.java

/**
 * Gets the unique child node of the given <code>parent</code> element.<br>
 * @param parent the parent node/*from w w  w  . j av  a  2 s .c o m*/
 * @param childName name of the wanted child node
 * @return the unique child of the parent node 
 */
public static Element getUniqueChild(Element parent, String childName) {
    Element child = null;
    if (parent != null && childName != null) {
        NodeList list = parent.getElementsByTagName(childName);
        if (list != null && list.getLength() > 0) {
            child = (Element) list.item(0);
        }
    }
    return child;
}

From source file:Main.java

public static List<Element> getElements(NodeList nodes, String[] path) {
    if (nodes == null)
        return null;

    for (int i = 1; i < path.length; i++) {
        Element element = (Element) nodes.item(0);
        if (element == null)
            break;
        nodes = element.getElementsByTagName(path[i]);
    }//from w w w . j  a v a  2s .  co  m
    if ((nodes == null) || (nodes.getLength() < 1))
        return null;

    List<Element> list = new ArrayList<Element>();
    for (int i = 0; i < nodes.getLength(); i++) {
        Element element = (Element) nodes.item(i);
        list.add(element);
    }

    return (list.size() < 1 ? null : list);
}

From source file:Main.java

/**
 * Helper function for quickly retrieving an boolean value of a given
 * XML element, with a default initialization value passed in a parameter.
 * @param ele The document element from which to pull the boolean value.
 * @param tagName The name of the node.//from   www.  ja v  a 2s. c  o  m
 * @param defaultValue The default value of the node if it's value can't be processed.
 * @return The boolean value of the given node in the element passed in.
 */
public static boolean getBooleanValue(Element ele, String tagName, boolean defaultValue) {

    boolean boolVal = defaultValue;
    NodeList nl = ele.getElementsByTagName(tagName);

    if (nl != null && nl.getLength() > 0) {

        Element el = (Element) nl.item(0);

        if (el.getFirstChild().getNodeValue() != null) {

            boolVal = "true".equals(el.getFirstChild().getNodeValue());

        } else {

            boolVal = defaultValue;

        }
    }

    return boolVal;
}

From source file:Main.java

/**
 * Checks in under a given root element whether it can find a child element
 * which matches the name supplied. Returns {@link Element} if exists.
 * /*from   ww w . j  av  a 2s .  com*/
 * @param name the Element name (required)
 * @param root the parent DOM element (required)
 * 
 * @return the Element if discovered
 */
public static Element findFirstElementByName(String name, Element root) {
    Assert.hasText(name, "Element name required");
    Assert.notNull(root, "Root element required");
    return (Element) root.getElementsByTagName(name).item(0);
}

From source file:Main.java

public static HashMap<String, String> getElementsByTagNameHashMap(String sTag, Element eElement) {
    String value = null;//w ww.j a  v a2 s  . com
    HashMap<String, String> map = new HashMap<String, String>();
    NodeList nlList = eElement.getElementsByTagName(sTag);
    if (nlList != null && nlList.item(0) != null) {
        NodeList nodes = nlList.item(0).getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            Node node = nodes.item(i);
            map.put(node.getNodeName(), node.getTextContent());
        }
    }
    return map;
}

From source file:Main.java

/**
 * Returns a child element with a given name from an XML element.
 * //from  w  w  w .  j a va2 s  . c  om
 * @param element
 *            A Element
 * @param tagName
 *            The name of the child element
 * 
 * @return The child element or <code>null</code> if no such child exists
 */
public static Element getChildElement(Element element, String tagName) {
    if (element == null) {
        return null;
    }
    NodeList list = element.getElementsByTagName(tagName);
    if (list != null && list.getLength() > 0) {
        return (Element) list.item(0);
    }
    return null;
}