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.nio.charset.StandardCharsets;
  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 CamelJMSHeadersSpanContextPropagationExtractor implements SpanContextPropagationExtractor {
  
      private final Map<String, Object> map = new CaseInsensitiveMap();
  
      public CamelJMSHeadersSpanContextPropagationExtractor(final Map<String, Object> map) {
          map.entrySet().stream().filter(e -> e.getValue() instanceof String || e.getValue() instanceof byte[]).forEach(e -> {
              if (e.getValue() instanceof byte[] bytes) {
                  this.map.put(decodeDash(e.getKey()), new String(bytes, StandardCharsets.UTF_8));
              } else {
                  this.map.put(decodeDash(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();
      }
  
      /**
       * Decode dashes (encoded in {@link CamelJMSHeadersSpanContextPropagationInjector} Dash encoding and decoding is
       * required by JMS. This is implemented here rather than specifically to JMS so that other Camel messaging endpoints
       * can take part in traces where the peer is using JMS.
       */
      private String decodeDash(String key) {
          if (key != null) {
              return key.replace(CamelJMSHeadersSpanContextPropagationInjector.JMS_DASH, "-");
          }
          return key;
      }
  }
  