// pre-order traversal
private void writeRecursively(DataOutput out, TernaryTreeNode node) throws IOException {
// write out the current node
out.writeString(new String(new char[] {node.splitchar}, 0, 1));
// prepare a mask of kids
byte mask = 0;
if (node.eqKid != null) mask |= EQ_KID;
if (node.loKid != null) mask |= LO_KID;
if (node.hiKid != null) mask |= HI_KID;
if (node.token != null) mask |= HAS_TOKEN;
if (node.val != null) mask |= HAS_VALUE;
out.writeByte(mask);
if (node.token != null) out.writeString(node.token);
if (node.val != null) out.writeLong(((Number) node.val).longValue());
// recurse and write kids
if (node.loKid != null) {
writeRecursively(out, node.loKid);
}
if (node.eqKid != null) {
writeRecursively(out, node.eqKid);
}
if (node.hiKid != null) {
writeRecursively(out, node.hiKid);
}
}
private void writeRecursively(DataOutput out, TSTNode node) throws IOException {
if (node == null) {
return;
}
out.writeString(new String(new char[] {node.splitchar}, 0, 1));
byte mask = 0;
if (node.relatives[TSTNode.LOKID] != null) mask |= LO_KID;
if (node.relatives[TSTNode.EQKID] != null) mask |= EQ_KID;
if (node.relatives[TSTNode.HIKID] != null) mask |= HI_KID;
if (node.data != null) mask |= HAS_VALUE;
out.writeByte(mask);
if (node.data != null) {
out.writeLong(((Number) node.data).longValue());
}
writeRecursively(out, node.relatives[TSTNode.LOKID]);
writeRecursively(out, node.relatives[TSTNode.EQKID]);
writeRecursively(out, node.relatives[TSTNode.HIKID]);
}