/**
* Unimplemented. See org.w3c.dom.Node
*
* @param newChild New child node to insert
* @param refChild Insert in front of this child
* @return null
* @throws DOMException
*/
public Node insertBefore(Node newChild, Node refChild) throws DOMException {
if (null == refChild) {
appendChild(newChild);
return newChild;
}
if (newChild == refChild) {
// hmm...
return newChild;
}
Node node = m_firstChild;
Node prev = null;
boolean foundit = false;
while (null != node) {
// If the newChild is already in the tree, it is first removed.
if (newChild == node) {
if (null != prev)
((ElemTemplateElement) prev).m_nextSibling = (ElemTemplateElement) node.getNextSibling();
else m_firstChild = (ElemTemplateElement) node.getNextSibling();
node = node.getNextSibling();
continue; // prev remains the same.
}
if (refChild == node) {
if (null != prev) {
((ElemTemplateElement) prev).m_nextSibling = (ElemTemplateElement) newChild;
} else {
m_firstChild = (ElemTemplateElement) newChild;
}
((ElemTemplateElement) newChild).m_nextSibling = (ElemTemplateElement) refChild;
((ElemTemplateElement) newChild).setParentElem(this);
prev = newChild;
node = node.getNextSibling();
foundit = true;
continue;
}
prev = node;
node = node.getNextSibling();
}
if (!foundit)
throw new DOMException(
DOMException.NOT_FOUND_ERR, "refChild was not found in insertBefore method!");
else return newChild;
}
/**
* Add a child to the child list. NOTE: This presumes the child did not previously have a parent.
* Making that assumption makes this a less expensive operation -- but requires that if you *do*
* want to reparent a node, you use removeChild() first to remove it from its previous context.
* Failing to do so will damage the tree.
*
* @param elem Child to be added to child list
* @return Child just added to the child list
*/
public ElemTemplateElement appendChild(ElemTemplateElement elem) {
if (null == elem) {
error(XSLTErrorResources.ER_NULL_CHILD, null); // "Trying to add a null child!");
}
if (null == m_firstChild) {
m_firstChild = elem;
} else {
ElemTemplateElement last = getLastChildElem();
last.m_nextSibling = elem;
}
elem.setParentElem(this);
return elem;
}
/**
* Set the parent as an ElemTemplateElement.
*
* @param p This node's parent as an ElemTemplateElement
*/
public void setParentElem(ElemTemplateElement p) {
super.setParentElem(p);
p.m_hasVariableDecl = true;
}
/**
* Set the parent of this node.
*
* @param n Must be a ElemTemplateElement.
*/
public void exprSetParent(ExpressionNode n) {
// This obviously requires that only a ElemTemplateElement can
// parent a node of this type.
setParentElem((ElemTemplateElement) n);
}