private void getAsPennTreebankString(int indent, int numOnLine, StringBuilder sb) {
int numSpaces = indent - numOnLine;
for (int i = 0; i < numSpaces; i++) {
sb.append(" ");
}
if (isLexical) {
sb.append(getSymbolStr());
} else {
sb.append("(");
sb.append(getSymbolStr());
// If this is a constant instead, then we have each depth in one column.
int numNewChars = 1 + getSymbolStr().length();
if (leftChild != null) {
// sb.append("\n");
leftChild.getAsPennTreebankString(indent + numNewChars + 1, indent + numNewChars, sb);
}
if (rightChild != null) {
sb.append("\n");
rightChild.getAsPennTreebankString(indent + numNewChars + 1, 0, sb);
}
sb.append(")");
}
}
/**
* Gets a string representation of this parse that looks like the typical Penn Treebank style
* parse.
*
* <p>Example: ((ROOT (S (NP (NN time)) (VP (VBZ flies) (PP (IN like) (NP (DT an) (NN arrow)))))))
*
* @return A string representing this parse.
*/
public String getAsPennTreebankString() {
StringBuilder sb = new StringBuilder();
sb.append("(");
getAsPennTreebankString(1, 1, sb);
sb.append(")");
return sb.toString();
}