content: package org.apache.lucene.queryparser.flexible.aqp.config;
  
  /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import org.apache.lucene.queryparser.flexible.aqp.config.AqpFeedbackEventHandler.ACTION;
  import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
  import org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessor;
  import org.apache.lucene.util.AttributeImpl;
  import org.apache.lucene.util.AttributeReflector;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class AqpFeedbackImpl extends AttributeImpl implements AqpFeedback {
  
      private static final long serialVersionUID = 5178148416076100953L;
  
      private final List<AqpFeedbackEvent> events = new ArrayList<AqpFeedbackEvent>();
      private final List<AqpFeedbackEventHandler> handlers = new ArrayList<AqpFeedbackEventHandler>();
  
      @Override
      public void clear() {
          events.clear();
      }
  
      @Override
      public void copyTo(AttributeImpl target) {
          throw new UnsupportedOperationException();
      }
  
      public void registerEventHandler(AqpFeedbackEventHandler handler) {
          handlers.add(handler);
      }
  
      public AqpFeedbackEvent createEvent(TYPE level,
                                          Class<? extends QueryNodeProcessor> qnClass, QueryNode node, String msg,
                                          Object... args) {
          return new AqpFeedbackEventImpl(level, qnClass, node, msg, args);
      }
  
      public void sendEvent(AqpFeedbackEvent event) {
          for (AqpFeedbackEventHandler handler : handlers) {
              ACTION r = handler.handle(event);
              if (r == ACTION.STOP) {
                  return;
              } else if (r == ACTION.SAVE_EVENT) {
                  if (!events.contains(event)) {
                      events.add(event);
                  }
              }
          }
      }
  
      @Override
      public void reflectWith(AttributeReflector reflector) {
          for (AqpFeedbackEvent ev : events) {
              reflector.reflect(AqpFeedback.class, "feedback", ev.getType());
          }
      }
  
  }
  