Java Utililty Methods XML Duration Add

Duration add(Duration d1, Duration d2)
Add one Duration to another, avoiding the runtime library bug that gives incorrect results when using decimal seconds.

boolean sign1 = d1.getSign() >= 0;
boolean sign2 = d2.getSign() >= 0;
if (sign1 && sign2)
 return addPositiveDurations(d1, d2);
if (!sign1 && !sign2)
 return addPositiveDurations(d1.negate(), d2.negate()).negate();
if (sign1 && !sign2)
 return subtract(d1, d2.negate());
...

Duration add(Duration... durations)
Adds the given list of durations together, returning the result.

Duration result = DATATYPE_FACTORY.newDuration(0);
if (durations != null) {
 for (int i = 0; i < durations.length; i++) {
 if (durations[i] != null) {
 result = result.add(durations[i]);
return result;

Element addElement(Element parent, String name)
Adds a child element to the parent.

return addElement(parent, name, null);

void addElement(Element parent, String tagName)
Add the element to the parent by the node name

Document doc = parent.getOwnerDocument();
Element child = doc.createElement(tagName);
parent.appendChild(child);

Element addElement(final Element parent, final String name, final Object value)
add Element

final Element ele = addElement(parent, name);
if (value != null) {
 ele.setTextContent(value.toString());
return ele;

Element addElement(Node parent, String elementName)
Add an Element node to the supplied parent name.

Element element = null;
if (parent instanceof Document) {
 element = ((Document) parent).createElement(elementName);
} else {
 element = parent.getOwnerDocument().createElement(elementName);
parent.appendChild(element);
return element;
...

Element addElement(Node parent, String name)
add Element

Element node;
if (parent.getOwnerDocument() != null)
 node = parent.getOwnerDocument().createElement(name);
else if (parent instanceof Document)
 node = ((Document) parent).createElement(name);
else
 return null;
parent.appendChild(node);
...

Element addElement(String name, Element parent)
add Element

Element e = parent.getOwnerDocument().createElement(name);
parent.appendChild(e);
return e;

Element addElementFirst(final Element parent, final String name)
Create a new element and add it as the first child

final Element ele = parent.getOwnerDocument().createElement(name);
parent.insertBefore(ele, null);
return ele;

Element addElementFirst(final Element parent, final String name)
add Element First

final Element ele = parent.getOwnerDocument().createElement(name);
parent.insertBefore(ele, null);
return ele;