/*
    * Copyright 2008 the original author or authors.
    * 
    * Licensed 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.openehealth.ipf.platform.camel.core.adapter;
  
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.spi.DataFormat;
  import org.openehealth.ipf.commons.core.modules.api.Converter;
  import org.openehealth.ipf.commons.core.modules.api.Parser;
  import org.openehealth.ipf.commons.core.modules.api.Renderer;
  
  /**
   * @author Martin Krasser
   */
  public class DataFormatAdapter extends AdapterSupport implements DataFormat {
  
      private final Parser parser;
      private final Renderer renderer;
      
      public DataFormatAdapter(Parser parser) {
          this(parser, null);
      }
      
      public DataFormatAdapter(Renderer renderer) {
          this(null, renderer);
      }
      
      public DataFormatAdapter(Parser parser, Renderer renderer) {
          this.parser = parser;
          this.renderer = renderer;
      }
      
      public DataFormatAdapter(Converter converter) {
          parser = converter;
          renderer = converter;
      }
      
      @Override
      public void marshal(Exchange exchange, Object graph, OutputStream stream) throws Exception {
          Object input = adaptInput(exchange);
          Object params = adaptParams(exchange);
          renderer.render(input, stream, params);
      }
  
      @Override
      public Object unmarshal(Exchange exchange, InputStream stream) throws Exception {
          Object params = adaptParams(exchange);
          return parser.parse(stream, params);
      }
  
  }