/**
* Dumps the current NodeToken to the output stream being used.
*
* @throws IllegalStateException if the token position is invalid relative to the current
* position, i.e. its location places it before the previous token.
*/
public void visit(NodeToken n) {
if (n.beginLine == -1 || n.beginColumn == -1) {
printToken(n.tokenImage);
return;
}
//
// Handle special tokens
//
if (printSpecials && n.numSpecials() > 0)
for (Enumeration<NodeToken> e = n.specialTokens.elements(); e.hasMoreElements(); )
visit(e.nextElement());
//
// Handle startAtNextToken option
//
if (startAtNextToken) {
curLine = n.beginLine;
curColumn = 1;
startAtNextToken = false;
if (n.beginColumn < curColumn) out.println();
}
//
// Check for invalid token position relative to current position.
//
if (n.beginLine < curLine)
throw new IllegalStateException(
"at token \""
+ n.tokenImage
+ "\", n.beginLine = "
+ Integer.toString(n.beginLine)
+ ", curLine = "
+ Integer.toString(curLine));
else if (n.beginLine == curLine && n.beginColumn < curColumn)
throw new IllegalStateException(
"at token \""
+ n.tokenImage
+ "\", n.beginColumn = "
+ Integer.toString(n.beginColumn)
+ ", curColumn = "
+ Integer.toString(curColumn));
//
// Move output "cursor" to proper location, then print the token
//
if (curLine < n.beginLine) {
curColumn = 1;
for (; curLine < n.beginLine; ++curLine) out.println();
}
for (; curColumn < n.beginColumn; ++curColumn) out.print(" ");
printToken(n.tokenImage);
}
private void printToken(String s) {
for (int i = 0; i < s.length(); ++i) {
if (s.charAt(i) == '\n') {
++curLine;
curColumn = 1;
} else curColumn++;
out.print(s.charAt(i));
}
out.flush();
}
/** Flushes the OutputStream or Writer that this TreeDumper is using. */
public void flushWriter() {
out.flush();
}