Java Utililty Methods XML Element Children

List of utility methods to do XML Element Children

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Description

The list of methods to do XML Element Children are organized into topic(s).

Method

Elementclear(Element node, String subElement)
clear 
Element child = findFirst(node, subElement);
if (child == null) {
    child = node.getOwnerDocument().createElement(subElement);
    node.appendChild(child);
child.setTextContent(null); 
return child;
ListfindAll(Element node, String subElement)
Returns all 'subElement' of 'node'. 
if (node != null) {
    NodeList nl = node.getElementsByTagName(subElement);
    if (nl != null && nl.getLength() > 0) {
        int n = nl.getLength();
        ArrayList<Element> ans = new ArrayList<Element>(n);
        for (int i = 0; i < n; ++i)
            ans.add((Element) nl.item(i));
        return ans;
...
ElementgetFirstSubElement(Element element)
get First Sub Element 
NodeList childNodes = element.getChildNodes();
for (int i = 0; i < childNodes.getLength(); i++) {
    switch (childNodes.item(i).getNodeType()) {
    case Node.ELEMENT_NODE:
        return (Element) childNodes.item(i);
return null;
...
ListgetImmediateSubElements(Element element, String name)
get Immediate Sub Elements 
NodeList nl = element.getChildNodes();
List<Element> els = new ArrayList<Element>();
for (int i = 0; i < nl.getLength(); i++) {
    Node n = nl.item(i);
    if (n == null || n.getNodeType() != Node.ELEMENT_NODE)
        continue;
    if (!n.getNodeName().equals(name))
        continue;
...
StringgetRelationUri(Element subject, Element object, String defaultBaseUri)
get Relation Uri 
return getSchemaUri(subject, defaultBaseUri) + "." + object.getNodeName();
ElementgetSubElement(Element ele, String tagName)
get Sub Element 
NodeList list = ele.getElementsByTagName(tagName);
if (list.getLength() > 0) {
    return (Element) list.item(0);
} else
    return null;
StringgetSubElement(Element element, String subTagName)
get Sub Element 
return getSubElement(element, subTagName, 0);
booleangetSubelementBoolean(final Element element, final String element_name, final boolean default_value)
Locate a sub-element tagged 'name', return its boolean value. 
final String s = getSubelementString(element, element_name);
if (s.equalsIgnoreCase("true"))
    return true;
if (s.equalsIgnoreCase("false"))
    return false;
return default_value;
doublegetSubelementDouble(final Element element, final String element_name)
Locate a sub-element tagged 'name', return its double value. 
final String s = getSubelementString(element, element_name);
try {
    return Double.parseDouble(s);
} catch (NumberFormatException ex) {
    throw new Exception("Missing numeric value for '" + element_name + "'");
doublegetSubelementDouble(final Element element, final String name, final double default_value)
Locate a sub-element tagged 'name', return its value. 
final String text = getSubelementString(element, name, "").trim();
if (text.isEmpty())
    return default_value;
try {
    return Double.parseDouble(text);
} catch (NumberFormatException ex) {
    throw new Exception("Invalid number for <" + name + ">", ex);