/**
* Remove a child. ADDED 9/8/200 to support compilation. TODO: ***** Alternative is "removeMe()
* from my parent if any" ... which is less well checked, but more convenient in some cases. Given
* that we assume only experts are calling this class, it might be preferable. It's less DOMish,
* though.
*
* @param childETE The child to remove. This operation is a no-op if oldChild is not a child of
* this node.
* @return the removed child, or null if the specified node was not a child of this element.
*/
public ElemTemplateElement removeChild(ElemTemplateElement childETE) {
if (childETE == null || childETE.m_parentNode != this) return null;
// Pointers to the child
if (childETE == m_firstChild) m_firstChild = childETE.m_nextSibling;
else {
ElemTemplateElement prev = childETE.getPreviousSiblingElem();
prev.m_nextSibling = childETE.m_nextSibling;
}
// Pointers from the child
childETE.m_parentNode = null;
childETE.m_nextSibling = null;
return childETE;
}
/**
* Get a variable based on it's qualified name. This is for external use only.
*
* @param xctxt The XPath context, which must be passed in order to lazy evaluate variables.
* @param qname The qualified name of the variable.
* @return The evaluated value of the variable.
* @throws javax.xml.transform.TransformerException
*/
public XObject getVariableOrParam(XPathContext xctxt, org.apache.xml.utils.QName qname)
throws javax.xml.transform.TransformerException {
org.apache.xml.utils.PrefixResolver prefixResolver = xctxt.getNamespaceContext();
// Get the current ElemTemplateElement, which must be pushed in as the
// prefix resolver, and then walk backwards in document order, searching
// for an xsl:param element or xsl:variable element that matches our
// qname. If we reach the top level, use the StylesheetRoot's composed
// list of top level variables and parameters.
if (prefixResolver instanceof org.apache.xalan.templates.ElemTemplateElement) {
org.apache.xalan.templates.ElemVariable vvar;
org.apache.xalan.templates.ElemTemplateElement prev =
(org.apache.xalan.templates.ElemTemplateElement) prefixResolver;
if (!(prev instanceof org.apache.xalan.templates.Stylesheet)) {
while (!(prev.getParentNode() instanceof org.apache.xalan.templates.Stylesheet)) {
org.apache.xalan.templates.ElemTemplateElement savedprev = prev;
while (null != (prev = prev.getPreviousSiblingElem())) {
if (prev instanceof org.apache.xalan.templates.ElemVariable) {
vvar = (org.apache.xalan.templates.ElemVariable) prev;
if (vvar.getName().equals(qname)) return getLocalVariable(xctxt, vvar.getIndex());
}
}
prev = savedprev.getParentElem();
}
}
vvar = prev.getStylesheetRoot().getVariableOrParamComposed(qname);
if (null != vvar) return getGlobalVariable(xctxt, vvar.getIndex());
}
throw new javax.xml.transform.TransformerException(
XSLMessages.createXPATHMessage(
XPATHErrorResources.ER_VAR_NOT_RESOLVABLE,
new Object[] {qname.toString()})); // "Variable not resolvable: " + qname);
}
/**
* Replace the old child with a new child.
*
* @param newChildElem New child to replace with
* @param oldChildElem Old child to be replaced
* @return The new child
* @throws DOMException
*/
public ElemTemplateElement replaceChild(
ElemTemplateElement newChildElem, ElemTemplateElement oldChildElem) {
if (oldChildElem == null || oldChildElem.getParentElem() != this) return null;
// Fix up previous sibling.
ElemTemplateElement prev = oldChildElem.getPreviousSiblingElem();
if (null != prev) prev.m_nextSibling = newChildElem;
// Fix up parent (this)
if (m_firstChild == oldChildElem) m_firstChild = newChildElem;
newChildElem.m_parentNode = this;
oldChildElem.m_parentNode = null;
newChildElem.m_nextSibling = oldChildElem.m_nextSibling;
oldChildElem.m_nextSibling = null;
// newChildElem.m_stylesheet = oldChildElem.m_stylesheet;
// oldChildElem.m_stylesheet = null;
return newChildElem;
}
