protected void toStringWork(Object p, Object stop, StringBuffer buf) {
if (!adaptor.isNil(p)) {
String text = adaptor.getText(p);
if (text == null) {
text = " " + String.valueOf(adaptor.getType(p));
}
buf.append(text); // ask the node to go to string
}
if (p == stop) {
return;
}
int n = adaptor.getChildCount(p);
if (n > 0 && !adaptor.isNil(p)) {
buf.append(" ");
buf.append(Token.DOWN);
}
for (int c = 0; c < n; c++) {
Object child = adaptor.getChild(p, c);
toStringWork(child, stop, buf);
}
if (n > 0 && !adaptor.isNil(p)) {
buf.append(" ");
buf.append(Token.UP);
}
}
public int LA(int i) {
Object t = LT(i);
if (t == null) {
return Token.INVALID_TOKEN_TYPE;
}
return adaptor.getType(t);
}
public String toString(Object start, Object stop) {
if (start == null) {
return null;
}
// if we have the token stream, use that to dump text in order
if (tokens != null) {
// don't trust stop node as it's often an UP node etc...
// walk backwards until you find a non-UP, non-DOWN node
// and ask for it's token index.
int beginTokenIndex = adaptor.getTokenStartIndex(start);
int endTokenIndex = adaptor.getTokenStopIndex(stop);
if (stop != null && adaptor.getType(stop) == Token.UP) {
endTokenIndex = adaptor.getTokenStopIndex(start);
} else {
endTokenIndex = size() - 1;
}
return tokens.toString(beginTokenIndex, endTokenIndex);
}
StringBuffer buf = new StringBuffer();
toStringWork(start, stop, buf);
return buf.toString();
}
