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 com.fasterxml.jackson.databind.JsonNode;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Set;
  
  public class BasicNode implements Node {
      private final String name;
      private final String hostname;
      private final Map<String, String> config;
      private final Set<String> tags;
  
      public BasicNode(String name, String hostname, Map<String, String> config,
                       Set<String> tags) {
          this.name = name;
          this.hostname = hostname;
          this.config = config;
          this.tags = tags;
      }
  
      public BasicNode(String name, JsonNode root) {
          this.name = name;
          String hostname = "localhost";
          Set<String> tags = Collections.emptySet();
          Map<String, String> config = new HashMap<>();
          for (Map.Entry<String, JsonNode> entry : root.properties()) {
              String key = entry.getKey();
              JsonNode node = entry.getValue();
              if (key.equals("hostname")) {
                  hostname = node.asText();
              } else if (key.equals("tags")) {
                  if (!node.isArray()) {
                      throw new RuntimeException("Expected the 'tags' field to be an " +
                              "array of strings.");
                  }
                  tags = new HashSet<>();
                  for (Iterator<JsonNode> tagIter = node.elements(); tagIter.hasNext(); ) {
                      JsonNode tag = tagIter.next();
                      tags.add(tag.asText());
                  }
              } else {
                  config.put(key, node.asText());
              }
          }
          this.hostname = hostname;
          this.tags = tags;
          this.config = config;
      }
  
      @Override
      public String name() {
          return name;
      }
  
      @Override
      public String hostname() {
          return hostname;
      }
  
      @Override
      public String getConfig(String key) {
          return config.get(key);
      }
  
      @Override
      public Set<String> tags() {
          return tags;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, hostname, config, tags);
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          BasicNode that = (BasicNode) o;
          return Objects.equals(name, that.name) &&
              Objects.equals(hostname, that.hostname) &&
              Objects.equals(config, that.config) &&
              Objects.equals(tags, that.tags);
      }
  }
  