public InternalNode(int d, Node p0, int k1, Node p1, Node n, Node p) {
super(d, n, p);
ptrs[0] = p0;
keys[1] = k1;
ptrs[1] = p1;
lastindex = 1;
if (p0 != null) p0.setParent(new Reference(this, 0, false));
if (p1 != null) p1.setParent(new Reference(this, 1, false));
}
public void insert(int val, Node ptr) {
// find correct position to insert
int p = this.findKeyIndex(val);
// if node is not full
if (!full()) {
// if val is larger than last key, increment p
if (val > this.getKey(this.getLast())) {
p++;
}
// insertion for simple case
this.insertSimple(val, ptr, p);
} else {
// create a neighbor node with val and ptr
Node split = new InternalNode(degree, null, val, ptr, this.getNext(), this);
// set split to be next node of current node
this.setNext(split);
// get val to be inserted into parent
int parentVal = this.redistribute();
// if current node has a parent, insert value into parent
if (this.getParent() != null) {
this.getParent().getNode().insert(parentVal, split);
// if no parent for current node, create a new root
} else {
Node newRoot = new InternalNode(degree, this, parentVal, split, null, null);
// set parent references
this.setParent(new Reference(newRoot, 0, false));
split.setParent(new Reference(newRoot, 1, false));
}
}
}