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.wasm;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.json.JsonMapper;
  import org.apache.camel.Exchange;
  
  public final class WasmSupport {
      public static final ObjectMapper MAPPER = JsonMapper.builder().build();
  
      private WasmSupport() {
      }
  
      public static byte[] serialize(Exchange exchange) throws Exception {
          Wrapper env = new Wrapper();
          env.body = exchange.getMessage().getBody(byte[].class);
  
          for (String headerName : exchange.getMessage().getHeaders().keySet()) {
              env.headers.put(headerName, exchange.getMessage().getHeader(headerName, String.class));
          }
  
          return MAPPER.writeValueAsBytes(env);
      }
  
      @SuppressWarnings({ "unchecked", "rawtypes" })
      public static void deserialize(byte[] in, Exchange out) throws Exception {
          // cleanup
          out.getMessage().getHeaders().clear();
          out.getMessage().setBody(null);
  
          Wrapper w = MAPPER.readValue(in, Wrapper.class);
          out.getMessage().setBody(w.body);
  
          if (w.headers != null) {
              out.getMessage().setHeaders((Map) w.headers);
          }
      }
  
      public static class Wrapper {
          @JsonProperty
          public Map<String, String> headers = new HashMap<>();
  
          @JsonProperty
          public byte[] body;
      }
  }
  