/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.joran.action;
  
  import org.xml.sax.Attributes;
  
  import ch.qos.logback.core.joran.spi.InterpretationContext;
  import ch.qos.logback.core.joran.spi.Pattern;
  import ch.qos.logback.core.util.OptionHelper;
  
  
  public class NewRuleAction extends Action {
    boolean inError = false;
  
    /**
     * Instantiates an layout of the given class and sets its name.
     */
    public void begin(InterpretationContext ec, String localName, Attributes attributes) {
      // Let us forget about previous errors (in this object)
      inError = false;
      String errorMsg;
      String pattern = attributes.getValue(Action.PATTERN_ATTRIBUTE);
      String actionClass = attributes.getValue(Action.ACTION_CLASS_ATTRIBUTE);
  
      if (OptionHelper.isEmpty(pattern)) {
        inError = true;
        errorMsg = "No 'pattern' attribute in <newRule>";
        addError(errorMsg);
        return;
      }
  
      if (OptionHelper.isEmpty(actionClass)) {
        inError = true;
        errorMsg = "No 'actionClass' attribute in <newRule>";
        addError(errorMsg);
        return;
      }
  
      try {
        addInfo("About to add new Joran parsing rule [" + pattern + ","
            + actionClass + "].");
        ec.getJoranInterpreter().getRuleStore().addRule(new Pattern(pattern),
            actionClass);
      } catch (Exception oops) {
        inError = true;
        errorMsg = "Could not add new Joran parsing rule [" + pattern + ","
            + actionClass + "]";
        addError(errorMsg);
      }
    }
  
    /**
     * Once the children elements are also parsed, now is the time to activate the
     * appender options.
     */
    public void end(InterpretationContext ec, String n) {
    }
  
    public void finish(InterpretationContext ec) {
    }
  }