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.kafka.trogdor.basic;
  
  import org.apache.kafka.trogdor.common.Node;
  import org.apache.kafka.trogdor.common.Topology;
  
  import com.fasterxml.jackson.databind.JsonNode;
  
  import java.util.Iterator;
  import java.util.NavigableMap;
  import java.util.TreeMap;
  
  public class BasicTopology implements Topology {
      private final NavigableMap<String, Node> nodes;
  
      public BasicTopology(NavigableMap<String, Node> nodes) {
          this.nodes = nodes;
      }
  
      public BasicTopology(JsonNode configRoot) {
          if (!configRoot.isObject()) {
              throw new RuntimeException("Expected the 'nodes' element to be " +
                  "a JSON object.");
          }
          nodes = new TreeMap<>();
          for (Iterator<String> iter = configRoot.fieldNames(); iter.hasNext(); ) {
              String nodeName = iter.next();
              JsonNode nodeConfig = configRoot.get(nodeName);
              BasicNode node = new BasicNode(nodeName, nodeConfig);
              nodes.put(nodeName, node);
          }
      }
  
      @Override
      public Node node(String id) {
          return nodes.get(id);
      }
  
      @Override
      public NavigableMap<String, Node> nodes() {
          return nodes;
      }
  }
  