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/**
* @author Stefan Haustein
*
* To change this generated comment edit the template variable "typecomment":
* Window>Preferences>Java>Templates.
*/
import java.io.*;
import org.xmlpull.v1.*;
import org.kxml2.io.*;
class Node {
private String text;
private Node yes; // if null, it's an answer
private Node no;
Node(String answer) {
this.text = answer;
}
Node(String question, Node yes, Node no) {
this.text = question;
this.yes = yes;
this.no = no;
}
void run () throws IOException {
if (yes == null)
System.out.println ("Answer: "+text);
else {
System.out.println (text+ " (y/n)");
while (true) {
int i = System.in.read();
if (i == 'y' || i == 'Y') {
yes.run();
break;
}
else if (i == 'n' || i == 'N') {
no.run();
break;
}
}
}
}
}
public class YesNoGame {
public static Node parseAnswer(XmlPullParser p) throws IOException, XmlPullParserException {
p.require(XmlPullParser.START_TAG, "", "answer");
Node result = new Node (p.nextText());
p.require(XmlPullParser.END_TAG, "", "answer");
return result;
}
public static Node parseQuestion(XmlPullParser p) throws IOException, XmlPullParserException {
p.require(XmlPullParser.START_TAG, "", "question");
String text = p.getAttributeValue("", "text");
Node yes = parseNode (p);
Node no = parseNode (p);
p.nextTag();
p.require(XmlPullParser.END_TAG, "", "question");
return new Node (text, yes, no);
}
public static Node parseNode (XmlPullParser p) throws IOException, XmlPullParserException {
p.nextTag ();
p.require(XmlPullParser.START_TAG, "", null);
if (p.getName().equals("question"))
return parseQuestion(p);
else
return parseAnswer(p);
}
public static void main(String[] args) throws IOException, XmlPullParserException {
String sample = "<question text='Is it round?'>\n"
+ " <question text='Is it bright?'>\n"
+ " <answer>It is the Sun!</answer>\n"
+ " <answer>It is a ball!</answer>\n"
+ " </question>\n"
+ " <answer>I do not know!</answer>\n"
+ "</question>\n";
XmlPullParser p = new KXmlParser();
p.setInput (new StringReader (sample));
Node game = parseNode (p);
game.run();
}
}
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