content: /*
   * 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
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  package org.apache.camel.telemetry.propagation;
  
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.camel.telemetry.SpanContextPropagationExtractor;
  import org.apache.camel.util.CaseInsensitiveMap;
  
  public final class CamelHeadersSpanContextPropagationExtractor implements SpanContextPropagationExtractor {
      private final Map<String, Object> map = new CaseInsensitiveMap();
  
      public CamelHeadersSpanContextPropagationExtractor(final Map<String, Object> map) {
          // Extract string valued map entries
          map.entrySet().stream().filter(e -> e.getValue() instanceof String)
                  .forEach(e -> this.map.put(e.getKey(), e.getValue()));
      }
  
      @Override
      public Iterator<Map.Entry<String, Object>> iterator() {
          return map.entrySet().iterator();
      }
  
      @Override
      public Object get(String key) {
          return this.map.get(key);
      }
  
      @Override
      public Set<String> keys() {
          return map.keySet();
      }
  }
  