static int getIndexInParent(Node node) {
Node parent = node.jjtGetParent();
for (int ii = 0; ii < parent.jjtGetNumChildren(); ii++) {
if (parent.jjtGetChild(ii) == node) {
return ii;
}
}
throw new IllegalStateException();
}
static Node getNext(Node node) {
Node parent = node.jjtGetParent();
int ii = getIndexInParent(node);
return ii < parent.jjtGetNumChildren() - 1 ? parent.jjtGetChild(ii + 1) : null;
}
static Node getPrev(Node node) {
Node parent = node.jjtGetParent();
int ii = getIndexInParent(node);
return ii > 0 ? parent.jjtGetChild(ii - 1) : null;
}
static Node getLastSibling(Node node) {
Node parent = node.jjtGetParent();
return parent.jjtGetChild(parent.jjtGetNumChildren() - 1);
}
static Node getFirstSibling(Node node) {
return node.jjtGetParent().jjtGetChild(0);
}