/*
    * Copyright 2016 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.commons.ihe.fhir;
  
  import ca.uhn.fhir.model.primitive.InstantDt;
  import ca.uhn.fhir.rest.api.server.IBundleProvider;
  import org.hl7.fhir.instance.model.api.IBaseResource;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Base class of a {@link IBundleProvider} delegating to a {@link RequestConsumer} instance
   */
  public abstract class AbstractBundleProvider implements IBundleProvider {
  
      private final RequestConsumer consumer;
      private Object payload;
      private Map<String, Object> headers;
  
      public AbstractBundleProvider(RequestConsumer consumer, Object payload, Map<String, Object> headers) {
          this.consumer = consumer;
          this.payload = payload;
          this.headers = headers;
      }
  
      @Override
      public InstantDt getPublished() {
          return InstantDt.withCurrentTime();
      }
  
      @Override
      public Integer preferredPageSize() {
          return null;
      }
  
      protected List<IBaseResource> obtainResources(Object payload, Map<String, Object> parameters) {
          return consumer.handleBundleRequest(payload, parameters);
      }
  
      protected RequestConsumer getConsumer() {
          return consumer;
      }
  
      /**
       * @return a copy of the original query parameters
       */
      protected Map<String, Object> getHeaders() {
          return new HashMap<>(headers);
      }
  
      protected Object getPayload() {
          return payload;
      }
  
      @Override
      public String getUuid() {
          return null;
      }
  }