package ch.qos.logback.access.common.boolex;
   
   import ch.qos.logback.access.common.spi.IAccessEvent;
   import ch.qos.logback.core.boolex.EvaluationException;
   import ch.qos.logback.core.boolex.EventEvaluatorBase;
   
   import java.util.regex.Pattern;
   import java.util.regex.PatternSyntaxException;
   
  /**
   * A very simple {@link ch.qos.logback.core.boolex.EventEvaluator EventEvaluator}
   * which checks whether the status of {@link IAccessEvent access event} is equal
   * to a status code given as a parameter.
   *
   * @since 2.0.6
   */
  public class RequestURIEventEvaluator extends EventEvaluatorBase<IAccessEvent> {
  
      String regex;
      private Pattern pattern;
  
      @Override
      public void start() {
          if (regex == null) {
              addError("regex is required");
              return;
          }
  
          try {
              addInfo("Compiling pattern [" + regex + "]");
              this.pattern = Pattern.compile(regex);
          } catch (PatternSyntaxException e) {
              addError("Invalid regular expression: " + regex);
              return;
          }
          super.start();
      }
  
      @Override
      public boolean evaluate(IAccessEvent iAccessEvent) throws NullPointerException, EvaluationException {
          if (!isStarted()) {
              throw new IllegalStateException("Evaluator [" + this + "] was called in stopped state");
          }
          String requestURI = iAccessEvent.getRequestURI();
          if(requestURI == null) {
              return false;
          }
  
          java.util.regex.Matcher matcher = pattern.matcher(requestURI);
          return matcher.find();
      }
  
      public String getRegex() {
          return regex;
      }
  
      public void setRegex(String regex) {
          this.regex = regex;
      }
  }