Example usage for org.w3c.dom Node getFirstChild

Introduction

In this page you can find the example usage for org.w3c.dom Node getFirstChild.

Prototype

public Node getFirstChild();

Source Link

Document

The first child of this node.

Usage

From source file:Main.java

/**
 * Sets the text value of an Element. if current text of the element is
 * replaced with the new text if text is null any
 * current text value is deleted./*from  w w w.  j av  a 2 s.c om*/
 * 
 * @param elem the Element for which the text value should be set
 * @param text the new text value of the element
 * @return true if the text could be set or false otherwise
 */
static public boolean setElementText(Node elem, Object text) {
    if (elem == null)
        return false; // Fehler
    // Find Text
    Node node = elem.getFirstChild();
    while (node != null) { // Find all Text nodes
        if (node.getNodeType() == Node.TEXT_NODE)
            break; // gefunden
        node = node.getNextSibling();
    }
    if (node != null) { // Set or remove text
        if (text != null)
            node.setNodeValue(text.toString());
        else
            elem.removeChild(node);
    } else if (text != null) { // Add Text
        elem.appendChild(elem.getOwnerDocument().createTextNode(text.toString()));
    }
    return true;
}

From source file:Main.java

/**
 *  Returns first node at the bottom of path from node.
 * If element begins with '@', indicates an attribute, eg "@id"
 * The '#text' element indicates that the node has a single text child.
 * @param node    Node to apply path to/*from  ww w. java 2 s .c om*/
 * @param path    Path to apply
 * @return        Node at bottom of path, or null
 */
static public Node extractNode(Node node, String path) {
    if (node == null)
        return null;
    NodeList list = node.getChildNodes();
    if (path.equals("#text"))
        return node.getFirstChild();
    else if (path.charAt(0) == '@')
        return node.getAttributes().getNamedItem(path.substring(1));
    else
        for (int j = 0; j < list.getLength(); j++)
            if (list.item(j).getNodeType() == Node.ELEMENT_NODE && list.item(j).getNodeName().equals(path))
                return list.item(j);

    return null;
}

From source file:Main.java

/**
 * Static helper function to get the element data of the specified node.
 * /*ww w .  java  2s  . c om*/
 * @param node
 *            the node where the text data resides; may be <code>null</code>
 *            in which case this funtion will return ""
 * 
 * @return the complete text of the specified node, or an empty string if
 *         the node has no text or is <code>null</code>
 */
public static String getElementData(final Node node) {
    StringBuffer ret = new StringBuffer();

    if (node != null) {
        Node text;
        for (text = node.getFirstChild(); text != null; text = text.getNextSibling()) {
            /**
             * the item's value is in one or more text nodes which are its
             * immediate children
             */
            if (text.getNodeType() == Node.TEXT_NODE || text.getNodeType() == Node.CDATA_SECTION_NODE) {
                ret.append(text.getNodeValue());
            } else {
                if (text.getNodeType() == Node.ENTITY_REFERENCE_NODE) {
                    ret.append(getElementData(text));
                }
            }
        }
    }
    return ret.toString();
}

From source file:Main.java

public static String textContent(Node node) {
    switch (node.getNodeType()) {
    case Node.ELEMENT_NODE:
        StringBuffer sb = new StringBuffer();
        Node nextChild = node.getFirstChild();
        while (nextChild != null) {
            sb.append(textContent(nextChild));
            nextChild = nextChild.getNextSibling();
        }//from www  .j a  v  a2 s . c  o  m
        return sb.toString();
    case Node.TEXT_NODE:
    case Node.CDATA_SECTION_NODE:
        return node.getNodeValue();
    default:
        return "";
    }
}

From source file:Main.java

/** Finds and returns the first child node with the given name. */
public static Element getFirstChildElement(Node parent, String elemName) {

    if (parent == null)
        return null;
    // search for node
    Node child = parent.getFirstChild();
    while (child != null) {
        if (child.getNodeType() == Node.ELEMENT_NODE) {
            if (child.getNodeName().equals(elemName)) {
                return (Element) child;
            }//  ww w.j a  va2  s .c o  m
        }
        child = child.getNextSibling();
    }

    // not found
    return null;

}

From source file:Main.java

static public int findAllDescendantElements(Node e, String qname, Collection vector) {
    int n = 0;//www .  j a  v  a  2 s . c  o  m
    if (e == null || qname == null)
        return 0;
    for (Node c = e.getFirstChild(); c != null; c = c.getNextSibling()) {
        if (c.getNodeType() == Node.ELEMENT_NODE && c.getNodeName().equals(qname)) {
            ++n;
            vector.add((Element) c);
        }
        n += findAllDescendantElements(c, qname, vector);
    }
    return n;
}

From source file:Main.java

/**
 * Searches parent node for matching child nodes and collects and returns
 * their values.//  ww w  .j  a va2  s . c  o  m
 *
 * @param node     The parent node
 * @param elemName The matching child node element name
 * @return List of node values
 */
public static Enumeration getChildrenNodeValues(Node node, String elemName) {
    Vector vect = new Vector();
    NodeList nl = node.getChildNodes();
    int n = nl.getLength();
    for (int i = 0; i < n; i++) {
        Node nd = nl.item(i);
        if (nd.getNodeName().equals(elemName)) {
            Node child = nd.getFirstChild();
            if (child == null) {
                vect.add("");
            } else {
                vect.add(child.getNodeValue());
            }
        }
    }
    return vect.elements();
}

From source file:Main.java

private static void extractText(Node n, StringBuffer buf) {
    if (n.getNodeType() == Node.TEXT_NODE) {
        buf.append(n.getNodeValue());/*ww w. j  av a2s.c  o m*/
    }

    for (n = n.getFirstChild(); n != null; n = n.getNextSibling()) {
        extractText(n, buf);
    }
}

From source file:Main.java

/**
 * Dumps a debug listing of the child nodes of the given node to
 * System.out.//from   w ww  .  ja v  a2 s  .  c o m
 * 
 * @param node the node to dump the children of
 */
public static void dumpChildren(Node node) {
    System.out.println("Children of " + node.getNodeName() + ", NS: " + node.getNamespaceURI() + ", Type: "
            + node.getClass());
    Node child = node.getFirstChild();
    while (child != null) {
        short nodeType = child.getNodeType();
        String nodeName = child.getNodeName();
        String nodeValue = child.getNodeValue();
        String nsURI = child.getNamespaceURI();
        System.out.println("  Type: " + nodeType + ", Name: " + nodeName + ", Value: " + nodeValue + ", NS: "
                + nsURI + ", Type: " + node.getClass());
        child = child.getNextSibling();
    }
}

From source file:Main.java

public static String getChildNodeValue(String nodeName, Node parent) {

    if (parent == null) {
        return null;
    }//  w w w  . j  a v a2 s  . c o m

    NodeList childNodes = parent.getChildNodes();
    for (int i = 0; i < childNodes.getLength(); i++) {
        Node node = childNodes.item(i);
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            if (node.getNodeName().equals(nodeName)) {
                Node firstChild = node.getFirstChild();
                if ((firstChild != null) && (firstChild.getNodeType() == Node.TEXT_NODE)) {
                    return firstChild.getNodeValue();
                } else {
                    return null;
                }
            }
        }
    }

    return null;
}