package org.webslinger.javacc.support;

 import java.util.List;

 import java.util.LinkedList;

 public abstract class AbstractParser {

     protected LinkedList<GenericParseException> errors = new LinkedList<GenericParseException>();

     protected int closeTokens[];

     protected void jjtreeOpenNodeScope(Object n) {

         //System.err.println("open(" + n + ')' + getToken(1));

         //((SimpleNode)n).firstToken = getToken(1);

     }

     protected void jjtreeCloseNodeScope(Object n) {

         //System.err.println("close(" + n + ')' + getToken(0));

         //((SimpleNode)n).lastToken = getToken(0);

         if (n instanceof PostProcessNode) ((PostProcessNode) n).postProcess();

     }

     public List<GenericParseException> getErrors() {

         return errors;

     }

     protected void handleException(GenericParseException e) {

         //System.err.println("=============");

         //e.printStackTrace();

         if (isEOFKind(e.getNextTokenKind())) return;

         errors.add(e);

     }

     protected abstract int getNextTokenKind();

     protected abstract boolean isEOFKind(int kind);

     protected void error_skipto(String location, String message, GenericParseException e, int kind) {

         //System.err.println("error_skipto(" + location + ", " + e.currentToken.kind + ", " + kind + ", " + message + ") " + e.currentToken.next.kind);

         int nextKind;

         int ignoreKind = e.getNextTokenKind();

         do {

             nextKind = getNextTokenKind();

         } while (nextKind != kind && !isEOFKind(nextKind) && nextKind == ignoreKind);

         if (!isEOFKind(nextKind)) errors.add(new LocatedException(location, message, e.getBeginLine(), e.getBeginColumn()));

         while (nextKind != kind && !isEOFKind(nextKind)) {

             nextKind = getNextTokenKind();

         }

     }

     protected void error_skipto(int kind) {

         //System.err.println("error_skipto(" + kind + ')');

         int nextKind;

         do {

             nextKind = getNextTokenKind();

         } while (nextKind != kind && !isEOFKind(nextKind));

     }

     protected void checkCloseToken(int token) throws CloseTokenFoundException {

         System.err.println("isCloseToken(" + token + ") " + closeTokens[token]);

         if (closeTokens[token] != 0) {

             CloseTokenFoundException e = new CloseTokenFoundException(token);

             throw e;

         }

     }

     protected boolean isCloseTokenAllowed(int token) {

         return closeTokens[token] == 0;

     }

     protected void disableCloseToken(int token) {

         closeTokens[token]--;

     }

     protected void enableCloseToken(int token) {

         closeTokens[token]++;

     }

 }