public void preOrderTraversal(LambdaOne<IntBinaryTree> function) {
// Visit this node.
function.call(this);
// Pre-order traversal of each child.
if (leftChild != null) {
leftChild.preOrderTraversal(function);
}
if (rightChild != null) {
rightChild.preOrderTraversal(function);
}
}
public void resetAlphabets(
final Alphabet<String> lexAlphabet, final Alphabet<String> ntAlphabet) {
preOrderTraversal(
new LambdaOne<IntBinaryTree>() {
public void call(IntBinaryTree node) {
String label = node.getSymbolLabel();
node.alphabet = node.isLexical ? lexAlphabet : ntAlphabet;
node.setSymbolLabel(label);
}
});
}