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.component.dns;
  
  import org.apache.camel.Endpoint;
  import org.apache.camel.Exchange;
  import org.apache.camel.support.DefaultProducer;
  import org.xbill.DNS.DClass;
  import org.xbill.DNS.Message;
  import org.xbill.DNS.Name;
  import org.xbill.DNS.Record;
  import org.xbill.DNS.SimpleResolver;
  import org.xbill.DNS.Type;
  
  /**
   * A producer for dig-like operations over DNS adresses.
   * <p/>
   * Inspired from Dig.java coming with the distribution of dnsjava, though most if not all options are unsupported.
   */
  public class DnsDigProducer extends DefaultProducer {
  
      public DnsDigProducer(Endpoint endpoint) {
          super(endpoint);
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          String server = exchange.getIn().getHeader(DnsConstants.DNS_SERVER, String.class);
  
          SimpleResolver resolver = new SimpleResolver(server);
          int type = Type.value(exchange.getIn().getHeader(DnsConstants.DNS_TYPE, String.class));
          if (type == -1) {
              // default: if unparsable value given, use A.
              type = Type.A;
          }
  
          String dclassValue = exchange.getIn().getHeader(DnsConstants.DNS_CLASS, String.class);
          if (dclassValue == null) {
              dclassValue = "";
          }
  
          int dclass = DClass.value(dclassValue);
          if (dclass == -1) {
              // by default, value is IN.
              dclass = DClass.IN;
          }
  
          Name name = Name.fromString(exchange.getIn().getHeader(DnsConstants.DNS_NAME, String.class), Name.root);
          Record rec = Record.newRecord(name, type, dclass);
          Message query = Message.newQuery(rec);
          Message response = resolver.send(query);
          exchange.getIn().setBody(response);
      }
  }
  