logback-android/src/main/java/ch/qos/logback/core/joran/action/NewRuleAction.java
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 ElementSelector(pattern),
          actionClass);
    } catch (Exception oops) {
      inError = true;
      errorMsg = "Could not add new Joran parsing rule [" + pattern + ","
          + actionClass + "]";
      addError(errorMsg);
    }
  }
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 ElementSelector(pattern),
          actionClass);
    } catch (Exception oops) {
      inError = true;
      errorMsg = "Could not add new Joran parsing rule [" + pattern + ","
          + actionClass + "]";
      addError(errorMsg);
    }
  }
Instantiates an layout of the given class and sets its name.