Example usage for org.w3c.dom Element getChildNodes

List of usage examples for org.w3c.dom Element getChildNodes

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Introduction

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

Prototype

public NodeList getChildNodes();

Source Link

Document

A NodeList that contains all children of this node.

Usage

From source file:Main.java

/**
 * Get all child elements of the specified (root) element, that are named by the specified name. If the root is null,
 * an illegal argument exception is thrown. If the root has no children by the specified name, an empty array is
 * returned.//from w  ww .ja  va 2s . co m
 * 
 * @param root The element to search.
 * @param name The name of the child elements to look for.
 * @return An array of the child elements named by the specified name, of the root.
 */
public static ArrayList<Element> getElements(Element root, String name) {
    if (root == null || name == null || name.length() <= 0)
        throw new IllegalArgumentException("Null or invalid root element or name!");
    NodeList lst = root.getChildNodes();
    int size = lst.getLength();
    ArrayList<Element> a = new ArrayList<Element>(size / 2);
    name = localName(name);
    for (int i = 0; i < size; i++) {
        Node node = lst.item(i);
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            String nodeName = localName(node);
            if (name.equals(nodeName))
                a.add((Element) node);
        }
    }
    return a;
}

From source file:Main.java

public static List<Element> getAllElementsWithAttrId(final Element element, final String namespace) {
    List<Element> list = new LinkedList<Element>();
    if (elementHasId(element, namespace)) {
        list.add(element);//from   w ww . jav a  2  s .c om
    }

    NodeList children = element.getChildNodes();
    for (int i = 0; i < children.getLength(); i++) {
        Node child = children.item(i);
        if (child instanceof Element == false) {
            continue;
        }

        addAllElementsWithAttrId(list, (Element) child, namespace);
    }

    return list;
}

From source file:no.kantega.commons.util.XMLHelper.java

public static void removeChild(Element parent, String name) {
    NodeList children = parent.getChildNodes();
    if (children == null)
        return;/* www . j a v  a  2s. com*/

    for (int i = 0; i < children.getLength(); i++) {
        Node child = children.item(i);
        if (child.getNodeName().equalsIgnoreCase(name)) {
            parent.removeChild(child);
        }
    }
}

From source file:Main.java

public static Element getFirstChildElementNS(Element elm, String tns, String localName) {
    if (tns == null && localName == null)
        return getFirstChildElement(elm);

    if (tns == null)
        return getFirstChildElement(elm, localName);

    NodeList nl = elm.getChildNodes();
    for (int c = 0; c < nl.getLength(); c++) {
        Node node = nl.item(c);//from   w w  w  .jav a2s  .  c  o m
        if (node.getNodeType() != Node.ELEMENT_NODE)
            continue;

        if (localName == null && tns.equals(node.getNamespaceURI()))
            return (Element) node;

        if (localName != null && tns.equals(node.getNamespaceURI()) && localName.equals(node.getLocalName()))
            return (Element) node;
    }

    return null;
}

From source file:Main.java

private static List<RSSChannel> readChannels(NodeList nodes) {
    List<RSSChannel> result = new ArrayList<RSSChannel>();
    for (int i = 0; i < nodes.getLength(); ++i) {
        Node node = nodes.item(i);
        if (node instanceof Element) {
            Element elem = (Element) node;
            if (elem.getTagName().equalsIgnoreCase("channel")) {
                result.add(readChannel(elem.getChildNodes()));
            }/*from  w w  w  .  jav a 2  s . c o m*/
        }
    }
    return result;
}

From source file:Main.java

/**
 * For compatibility reasons the following is required:
 * If the value of a text node is to be changed, but a CDATA section with this name
 * already exists, the CDATA section is removed an a text node is created or changed.
 *
 * If the value of a CDATA section is to be changed, but a text node with this name
 * already exists, the text node is removed an a CDATA section is created or changed.
 *
 */// w ww.j  a  v a  2 s  .  c o m
public static void setElementText(Element e, String newValue, boolean cdata) {
    if (e == null) {
        return;
    }

    Node node = null;

    NodeList children = e.getChildNodes();

    if (children != null) {
        Node childToRemove = null;
        boolean changed = false;

        int listLength = children.getLength();

        for (int i = 0; i < listLength; i++) {
            node = children.item(i);

            int nodeType = node.getNodeType();

            if (nodeType == Node.TEXT_NODE) {
                if (cdata) {
                    childToRemove = node;
                } else {
                    node.setNodeValue(newValue);
                    changed = true;
                }
            }

            if (nodeType == Node.CDATA_SECTION_NODE) {
                if (!cdata) {
                    childToRemove = node;
                } else {
                    node.setNodeValue(newValue);
                    changed = true;
                }

            }
        }

        if (childToRemove != null) {
            // System.out.println("removing child " + childToRemove.getNodeValue());
            childToRemove.setNodeValue("");
            e.removeChild(childToRemove);
        }

        if (changed) {
            return;
        }
    }

    Document doc = e.getOwnerDocument();

    if (cdata) {
        node = doc.createCDATASection(newValue);
    } else {
        node = doc.createTextNode(newValue);
    }

    e.appendChild(node);
}

From source file:no.kantega.commons.util.XMLHelper.java

public static Element getChildByName(Element parent, String name) {
    NodeList children = parent.getChildNodes();
    if (children == null)
        return null;

    for (int i = 0; i < children.getLength(); i++) {
        Node child = children.item(i);
        if (child.getNodeName().equalsIgnoreCase(name)) {
            return (Element) child;
        }//  www .j a va 2 s  .  c o m
    }

    return null;
}

From source file:Main.java

public static Element getChildWithAttributeValue(Element element, String attributeName, String attributeValue) {

    if (element == null) {
        return null;
    }/*  w ww . j  a v  a2  s . com*/

    NodeList children;

    try {
        children = element.getChildNodes();
    } catch (IllegalArgumentException e) {
        // We've seen this throw a IllegalArgumentException from
        // com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.getNodeObject(DeferredDocumentImpl.java:1081)
        // under GWT 1.7

        return null;
    }

    int length;

    try {
        length = children.getLength();
    } catch (NullPointerException e) {
        // We've seen this throw a NullPointerException from
        // com.sun.org.apache.xerces.internal.dom.ParentNode.nodeListGetLength(ParentNode.java:696)
        // under GWT 1.7

        return null;
    }

    for (int loop = 0; loop < length; loop++) {
        Node node;

        try {
            node = children.item(loop);
        } catch (NullPointerException e) {
            // We've seen this throw a NullPointerException from
            // com.sun.org.apache.xerces.internal.dom.ParentNode.nodeListItem(ParentNode.java:780)
            // under GWT 1.7

            continue;
        }

        if (!(node instanceof Element)) {
            continue;
        }

        Element child = (Element) node;

        try {
            if (attributeValue.equals(child.getAttribute(attributeName))) {
                return child;
            }
        } catch (NullPointerException e) {
            // We've seen this throw a NullPointerException from
            // com.sun.org.apache.xerces.internal.dom.DeferredAttrNSImpl.synchronizeData(DeferredAttrNSImpl.java:97)
            // under GWT 1.7

            continue;
        }
    }

    return null;
}

From source file:Main.java

/**
 * Returns an iterator over the children of the given element with
 * the given tag name./* w ww  .ja v  a  2  s .  co  m*/
 *
 * @param element The parent element
 * @param tagName The name of the desired child
 * @return An interator of children or null if element is null.
 */
public static Iterator getChildrenByTagName(Element element, String tagName) {
    if (element == null) {
        return null;
    }
    // getElementsByTagName gives the corresponding elements in the whole
    // descendance. We want only children

    NodeList children = element.getChildNodes();
    ArrayList goodChildren = new ArrayList();
    for (int i = 0; i < children.getLength(); i++) {
        Node currentChild = children.item(i);
        if (currentChild.getNodeType() == Node.ELEMENT_NODE
                && ((Element) currentChild).getTagName().equals(tagName)) {
            goodChildren.add(currentChild);
        }
    }
    return goodChildren.iterator();
}

From source file:Main.java

/**
 * This method will find all the parameters under this <code>paramsElement</code> and return them as
 * Map<String, String>. For example,
 * <pre>// w w  w.  ja v  a2  s  .  c  om
 *   <result ... >
 *      <param name="param1">value1</param>
 *      <param name="param2">value2</param>
 *      <param name="param3">value3</param>
 *   </result>
 * </pre>
 * will returns a Map<String, String> with the following key, value pairs :-
 * <ul>
 * <li>param1 - value1</li>
 * <li>param2 - value2</li>
 * <li>param3 - value3</li>
 * </ul>
 *
 * @param paramsElement
 * @return
 */
public static Map<String, String> getParams(Element paramsElement) {
    LinkedHashMap<String, String> params = new LinkedHashMap<String, String>();

    if (paramsElement == null) {
        return params;
    }

    NodeList childNodes = paramsElement.getChildNodes();

    for (int i = 0; i < childNodes.getLength(); i++) {
        Node childNode = childNodes.item(i);

        if ((childNode.getNodeType() == Node.ELEMENT_NODE) && "param".equals(childNode.getNodeName())) {
            Element paramElement = (Element) childNode;
            String paramName = paramElement.getAttribute("name");

            String val = getContent(paramElement);
            if (val.length() > 0) {
                params.put(paramName, val);
            }
        }
    }

    return params;
}