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:Utils.java

public static Element findContainerWithAttributeValueElseCreate(Document document, Element parent,
        String element, String attributeName, String attributeValue) {

    NodeList nl = parent.getElementsByTagName(element);
    Element e;/*  w  ww  .j  a v  a2  s.com*/
    for (int i = 0; i < nl.getLength(); i++) {
        e = (Element) nl.item(i);
        if (e.getAttribute(attributeName).equals(attributeValue)) {
            return e;
        }
    }

    e = document.createElement(element);
    parent.appendChild(e);
    e.setAttribute(attributeName, attributeValue);

    return e;
}

From source file:Main.java

/**
 * Get one element by tag name.//from  w ww  .j  av  a  2  s. c o  m
 * @return An Element object or null if no matching element.
 */
////
// METHOD: getOneElement
////
public static Element getOneElement(Element inParentElement, String inTagName) {
    Element retElement = null;
    try {
        NodeList wkNodeList = inParentElement.getElementsByTagName(inTagName);
        if (wkNodeList.getLength() > 0)
            retElement = (Element) wkNodeList.item(0);
    } catch (Exception excp) {
        ;
    }

    return retElement;
}

From source file:Main.java

/**
 * Returns the string value specified with the given tag name in the specified element. Assumes
 * that there is only one tag of the speicified name in the element.
 * //from  w ww  . ja  v  a 2 s.  c o m
 * @param element
 * @param tagName
 * @return the string value specified with the given tag name in the specified element
 */
public static String getSingleTagValue(Element element, String tagName) {
    NodeList nodes = element.getElementsByTagName(tagName);
    if (!hasUniqueNode(nodes)) {
        return null;
    }

    Element e = (Element) nodes.item(0);
    if (e == null) {
        return null;
    }

    return e.getFirstChild().getNodeValue();
}

From source file:Main.java

/**
 * @param parent the parent XML element/*w w w. j  a va 2  s  . c o m*/
 * @param childName the child node name
 * @return the child XML element with specified node name or <code>null</code> if does not exist
 */
public static Element getChildElement(final Element parent, final String childName) {

    Element child = null;
    if (parent != null) {
        NodeList children = parent.getElementsByTagName(childName);
        if (children.getLength() > 0) {
            child = (Element) children.item(0);
        }
    }
    return child;
}

From source file:Main.java

/**
 * Traverses the DOM tree to lookup the XPath.
 * /*from  ww  w. ja  v a2s.co  m*/
 * A sample XPath would look like "Parent > Child > Grandchild" for a DOM
 * tree as following:
 * 
 * <pre>
 * <Parent>
 *       <Child>
 *          <Grandchild>
 *          </Grandchild>
 *       </Child>
 * </Parent>
 * </pre>
 * 
 * @param e
 *            The DOM element to look under
 * @param xPath
 *            A path to lookup
 * @param separator
 *            String separator used to break up level hierarchy with in the
 *            path
 * @return Node(s) found at the given path
 */
public static NodeList lookup(Element e, String xPath, String separator) {
    String[] trail = { xPath };
    if (separator != null) {
        trail = xPath.split(separator);
    }
    Element parent = e;
    for (int i = 0; i < trail.length - 1; i++) {
        parent = (Element) parent.getElementsByTagName(trail[i].trim()).item(0);
    }
    return parent.getElementsByTagName(trail[trail.length - 1].trim());
}

From source file:Main.java

/**
 * Finds the first element which name matchtes a given tag name
 * that is locacted anywhere below the given parent.
 * // w  w  w .  j ava  2 s .c  o m
 * @param parent the parent element below which to search the child
 * @param tagName the (tag) name of the desired child element
 * @return the child element if an element of that name existed, or null otherwise
 */
static public Element findFirstChildDeep(Element parent, String tagName) { // Child Element suchen
    if (parent == null)
        return null;
    NodeList nl = parent.getElementsByTagName(tagName);
    for (int i = 0; i < nl.getLength(); i++) {
        if (nl.item(i).getNodeType() == Node.ELEMENT_NODE)
            return (Element) nl.item(i);
    }
    return null;
}

From source file:nl.igorski.lib.utils.data.XMLTool.java

/**
 * get the value of a specific tag in an Element
 *
 * @param element {Element}//w w  w  .j av a2  s .c  o m
 * @param tagName {String} name of the tag
 * @return {String} the tags value
 */
public static String getTagValue(Element element, String tagName) {
    try {
        NodeList list = element.getElementsByTagName(tagName);
        Element theElement = (Element) list.item(0);

        NodeList textList = theElement.getChildNodes();
        return textList.item(0).getNodeValue().trim();
    } catch (Exception e) {
    }

    return "";
}

From source file:XMLUtils.java

/**
 * Returns the value of the given node./*ww w .  j  a v  a  2s. c o  m*/
 * @param base the element from where to search.
 * @param name of the element to get.
 * @return the value of this element.
 */
public static String getStringValueElement(final Element base, final String name) {
    String value = null;

    // Get element
    NodeList list = base.getElementsByTagName(name);
    if (list.getLength() == 1) {
        Element element = (Element) list.item(0);
        Node node = element.getFirstChild();
        if (node != null) {
            value = node.getNodeValue();
        }
    } else if (list.getLength() > 1) {
        throw new IllegalStateException("Element '" + name + "' on '" + base
                + "' should be unique but there are '" + list.getLength() + "' elements");
    }

    if (value != null) {
        value = value.trim();
    }
    return value;
}

From source file:Main.java

/**
 * Get the XML children element of an XML element, but only those of a
 * certain type//from w  w w . j  av a  2  s  .  c  o m
 *
 * @param parent
 *            The parent element to get the children from
 * @param elementTag
 *            The tag of the elements to return
 * @return The list of children {@link Element} of the parent
 */
public static List<Element> getChildElements(Element parent, String elementTag) {
    /* get the state providers and find the corresponding one */
    NodeList nodes = parent.getElementsByTagName(elementTag);
    List<Element> childElements = new ArrayList<>();

    for (int i = 0; i < nodes.getLength(); i++) {
        Element node = (Element) nodes.item(i);
        if (node.getParentNode().equals(parent)) {
            childElements.add(node);
        }
    }
    return childElements;
}

From source file:Main.java

public static String getText(Element rootElem, String[] path) {
    NodeList nodes = rootElem.getElementsByTagName(path[0]);
    if (nodes == null || nodes.getLength() < 1) {
        // failsafe if first item is @attribute identifier
        // then read attribute value from rootElement.
        boolean isAttrText = path[0].charAt(0) == '@';
        if (!isAttrText)
            return null;
        Attr attr = rootElem.getAttributeNode(path[0].substring(1));
        return (attr != null ? attr.getValue() : null);
    }//from  w w w .j av  a2  s  .  c  om
    Element element = (Element) nodes.item(0);
    return getText(element, path, 1);
}