/**
* Find the current dasextension::query::sites element or create a new one in the proper place in
* the given dasextension element.
*
* @param dasExt - mandatory - must be a valid dasextension Element
* @return
*/
public ExtensibleElement getSites(ExtensibleElement dasExt) {
// get reference to the dasextension::query element in feed
ExtensibleElement query = this.getQuery(dasExt);
// get reference to the dasextension::query::sites element in feed
QName sitesQname = new QName(this.dasextensionNamespace, "sites");
ExtensibleElement sites = query.getExtension(sitesQname);
if (NullChecker.isEmpty(sites)) {
ExtensibleElement queryFirstChild = query.getFirstChild();
if (NullChecker.isEmpty(queryFirstChild)) {
// no children in query, so merely add sites element
sites = query.addExtension(sitesQname);
} else {
QName fCQname = queryFirstChild.getQName();
if ("parameters".equals(fCQname.getLocalPart())) {
ExtensibleElement querySecondChild = query.getNextSibling();
if (NullChecker.isEmpty(querySecondChild)) {
// no second child in query, so add sites after parameters
sites = query.addExtension(sitesQname);
} else {
// add sites after parameters, and before the second child
QName sCQname = querySecondChild.getQName();
sites = query.addExtension(sitesQname, sCQname);
}
} else {
// another element besides parameters is first child,
// so add sites before this
sites = dasExt.addExtension(sitesQname, fCQname);
}
}
}
return sites;
}
/**
* Find the current dasextension::query element or create a new one in the proper place in the
* given dasextension element.
*
* @param dasExt - mandatory - must be a valid dasextension Element
* @return
*/
private ExtensibleElement getQuery(ExtensibleElement dasExt) {
QName queryQname = new QName(this.dasextensionNamespace, "query");
// attempt to get query element
ExtensibleElement query = dasExt.getExtension(queryQname);
if (NullChecker.isEmpty(query)) {
// there is no query element, so create one in the proper place
ExtensibleElement firstChild = dasExt.getFirstChild();
if (NullChecker.isEmpty(firstChild)) {
// no children, so merely add query
query = dasExt.addExtension(queryQname);
} else {
QName fCQname = firstChild.getQName();
if ("path".equals(fCQname.getLocalPart())) {
// path is the firstChild, so get the second child
ExtensibleElement secondChild = firstChild.getNextSibling();
if (NullChecker.isEmpty(secondChild)) {
// no second child, so add query after path
query = dasExt.addExtension(queryQname);
} else {
QName sCQname = secondChild.getQName();
// have a second child, so add query after
// path element and before second child
query = dasExt.addExtension(queryQname, sCQname);
}
} else {
// add query before the first child element
query = dasExt.addExtension(queryQname, fCQname);
}
}
}
return query;
}