/* -----------------------------------------------------------------------------
 * ParserContext.java
 * -----------------------------------------------------------------------------
 *
 * Producer : com.parse2.aparse.Parser 2.0
 * Produced : Wed Jul 27 12:21:32 CDT 2011
 *
 * -----------------------------------------------------------------------------
 */

package gov.nist.syslog.rfc3164Parser;

import java.util.Stack;

public class ParserContext {
    public final String text;
    private final boolean traceOn;
    public int index;
    private Stack<String> callStack = new Stack<String>();
    private Stack<String> errorStack = new Stack<String>();
    private int level = 0;
    private int error = -1;
    private int start = 0;

    public ParserContext(String text, boolean traceOn) {
        this.text = text;
        this.traceOn = traceOn;
        index = 0;
    }

    public void push(String rulename) {
        push(rulename, "");
    }

    public void push(String rulename, String trace) {
        callStack.push(rulename);
        start = index;
        if (traceOn) {
            System.out.println("-> " + ++level + ": " + rulename + "(" + (trace != null ? trace : "") + ")");
            System.out.println(index + ": " + text.substring(index, index + 10 > text.length() ? text.length() : index + 10).replaceAll("[^\\p{Print}]", " "));
        }
    }

    public void pop(String function, boolean result) {
        callStack.pop();
        if (traceOn) {
            System.out.println("<- " + level-- + ": " + function + "(" + (result ? "true," : "false,") + (index - start) + ")");
        }
        if (!result) {
            if (index > error) {
                error = index;
                errorStack = new Stack<String>();
                errorStack.addAll(callStack);
            }
        } else {
            if (index > error) error = -1;
        }
    }

    public Stack<String> getErrorStack() {
        return errorStack;
    }

    public int getErrorIndex() {
        return error;
    }
}

/* -----------------------------------------------------------------------------
 * eof
 * -----------------------------------------------------------------------------
 */