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.quarkus.core.languages.it;
  
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.nio.charset.StandardCharsets;
  
  import jakarta.enterprise.context.ApplicationScoped;
  import jakarta.enterprise.inject.Produces;
  import jakarta.inject.Named;
  import jakarta.inject.Singleton;
  import org.apache.camel.Exchange;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.spi.DataFormat;
  import org.apache.camel.support.ExchangeHelper;
  
  @ApplicationScoped
  public class CustomDataFormatRoutes extends RouteBuilder {
  
      @Override
      public void configure() {
          from("direct:customDataFormatMarshal")
                  .marshal().custom("customDataFormat");
          from("direct:customDataFormatUnmarshal")
                  .unmarshal().custom("customDataFormat");
      }
  
      @Singleton
      @Named("customDataFormat")
      @Produces
      public DataFormat myExpression() {
          return new DataFormat() {
  
              @Override
              public void start() {
              }
  
              @Override
              public void stop() {
              }
  
              @Override
              public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
                  String payload = ExchangeHelper.convertToMandatoryType(exchange, String.class, graph);
                  stream.write(("(" + payload + ")").getBytes(StandardCharsets.UTF_8));
                  stream.flush();
              }
  
              @Override
              public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
                  StringBuilder sb = new StringBuilder();
                  try (InputStreamReader in = new InputStreamReader(stream, StandardCharsets.UTF_8)) {
                      int c;
                      while ((c = in.read()) >= 0) {
                          sb.append((char) c);
                      }
                  }
                  if (sb.charAt(0) != '(' || sb.charAt(sb.length() - 1) != ')') {
                      throw new IllegalArgumentException("customDataFormat input must start with ( and end with )");
                  }
                  return sb.substring(1, sb.length() - 1);
              }
          };
      }
  
  }
  